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Unverified Commit 5f6d10c1 authored by Michael Goin's avatar Michael Goin Committed by GitHub
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[CI/Build] Enforce style for C++ and CUDA code with `clang-format` (#4722)

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.clang-format 0 → 100644
View file @ 5f6d10c1
BasedOnStyle: Google
UseTab: Never
IndentWidth: 2
ColumnLimit: 80
# Force pointers to the type for C++.
DerivePointerAlignment: false
PointerAlignment: Left
# Reordering #include statements can (and currently will) introduce errors
SortIncludes: false
# Style choices
AlignConsecutiveAssignments: false
AlignConsecutiveDeclarations: false
IndentPPDirectives: BeforeHash
IncludeCategories:
- Regex: '^<'
Priority: 4
- Regex: '^"(llvm|llvm-c|clang|clang-c|mlir|mlir-c)/'
Priority: 3
- Regex: '^"(qoda|\.\.)/'
Priority: 2
- Regex: '.*'
Priority: 1
.github/workflows/clang-format.yml 0 → 100644
View file @ 5f6d10c1
name: clang-format
on:
# Trigger the workflow on push or pull request,
# but only for the main branch
push:
branches:
- main
pull_request:
branches:
- main
jobs:
clang-format:
runs-on: ubuntu-latest
strategy:
matrix:
python-version: ["3.11"]
steps:
- uses: actions/checkout@v2
- name: Set up Python ${{ matrix.python-version }}
uses: actions/setup-python@v2
with:
python-version: ${{ matrix.python-version }}
- name: Install dependencies
run: |
python -m pip install --upgrade pip
pip install clang-format==18.1.5
- name: Running clang-format
run: |
EXCLUDES=(
'csrc/moe/topk_softmax_kernels.cu'
'csrc/punica/bgmv/bgmv_bf16_bf16_bf16.cu'
'csrc/punica/bgmv/bgmv_config.h'
'csrc/punica/bgmv/bgmv_impl.cuh'
'csrc/punica/bgmv/vec_dtypes.cuh'
'csrc/punica/punica_ops.cu'
'csrc/punica/type_convert.h'
)
find csrc/ \( -name '*.h' -o -name '*.cpp' -o -name '*.cu' -o -name '*.cuh' \) -print \
| grep -vFf <(printf "%s\n" "${EXCLUDES[@]}") \
| xargs clang-format --dry-run --Werror
\ No newline at end of file
csrc/activation_kernels.cu
View file @ 5f6d10c1
......@@ -10,11 +10,11 @@
namespace vllm {
// Activation and gating kernel template.
template<typename scalar_t, scalar_t (*ACT_FN)(const scalar_t&)>
template <typename scalar_t, scalar_t (*ACT_FN)(const scalar_t&)>
__global__ void act_and_mul_kernel(
scalar_t* __restrict__ out, // [..., d]
const scalar_t* __restrict__ input, // [..., 2, d]
const int d) {
scalar_t* __restrict__ out, // [..., d]
const scalar_t* __restrict__ input, // [..., 2, d]
const int d) {
const int64_t token_idx = blockIdx.x;
for (int64_t idx = threadIdx.x; idx < d; idx += blockDim.x) {
const scalar_t x = VLLM_LDG(&input[token_idx * 2 * d + idx]);
......@@ -23,72 +23,66 @@ __global__ void act_and_mul_kernel(
}
}
template<typename T>
template <typename T>
__device__ __forceinline__ T silu_kernel(const T& x) {
// x * sigmoid(x)
return (T) (((float) x) / (1.0f + expf((float) -x)));
return (T)(((float)x) / (1.0f + expf((float)-x)));
}
template<typename T>
template <typename T>
__device__ __forceinline__ T gelu_kernel(const T& x) {
// Equivalent to PyTorch GELU with 'none' approximation.
// Refer to:
// https://github.com/pytorch/pytorch/blob/8ac9b20d4b090c213799e81acf48a55ea8d437d6/aten/src/ATen/native/cuda/ActivationGeluKernel.cu#L36-L38
const float f = (float) x;
const float f = (float)x;
constexpr float ALPHA = M_SQRT1_2;
return (T) (f * 0.5f * (1.0f + ::erf(f * ALPHA)));
return (T)(f * 0.5f * (1.0f + ::erf(f * ALPHA)));
}
template<typename T>
template <typename T>
__device__ __forceinline__ T gelu_tanh_kernel(const T& x) {
// Equivalent to PyTorch GELU with 'tanh' approximation.
// Refer to:
// https://github.com/pytorch/pytorch/blob/8ac9b20d4b090c213799e81acf48a55ea8d437d6/aten/src/ATen/native/cuda/ActivationGeluKernel.cu#L25-L30
const float f = (float) x;
const float f = (float)x;
constexpr float BETA = M_SQRT2 * M_2_SQRTPI * 0.5f;
constexpr float KAPPA = 0.044715;
float x_cube = f * f * f;
float inner = BETA * (f + KAPPA * x_cube);
return (T) (0.5f * f * (1.0f + ::tanhf(inner)));
return (T)(0.5f * f * (1.0f + ::tanhf(inner)));
}
} // namespace vllm
} // namespace vllm
// Launch activation and gating kernel.
#define LAUNCH_ACTIVATION_GATE_KERNEL(KERNEL) \
int d = input.size(-1) / 2; \
int64_t num_tokens = input.numel() / input.size(-1); \
dim3 grid(num_tokens); \
dim3 block(std::min(d, 1024)); \
const at::cuda::OptionalCUDAGuard device_guard(device_of(input)); \
const cudaStream_t stream = at::cuda::getCurrentCUDAStream(); \
VLLM_DISPATCH_FLOATING_TYPES( \
input.scalar_type(), \
"act_and_mul_kernel", \
[&] { \
vllm::act_and_mul_kernel<scalar_t, KERNEL<scalar_t>><<<grid, block, 0, stream>>>( \
out.data_ptr<scalar_t>(), \
input.data_ptr<scalar_t>(), \
d); \
});
void silu_and_mul(
torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
#define LAUNCH_ACTIVATION_GATE_KERNEL(KERNEL) \
int d = input.size(-1) / 2; \
int64_t num_tokens = input.numel() / input.size(-1); \
dim3 grid(num_tokens); \
dim3 block(std::min(d, 1024)); \
const at::cuda::OptionalCUDAGuard device_guard(device_of(input)); \
const cudaStream_t stream = at::cuda::getCurrentCUDAStream(); \
VLLM_DISPATCH_FLOATING_TYPES( \
input.scalar_type(), "act_and_mul_kernel", [&] { \
vllm::act_and_mul_kernel<scalar_t, KERNEL<scalar_t>> \
<<<grid, block, 0, stream>>>(out.data_ptr<scalar_t>(), \
input.data_ptr<scalar_t>(), d); \
});
void silu_and_mul(torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
{
LAUNCH_ACTIVATION_GATE_KERNEL(vllm::silu_kernel);
}
void gelu_and_mul(
torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
void gelu_and_mul(torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
{
LAUNCH_ACTIVATION_GATE_KERNEL(vllm::gelu_kernel);
}
void gelu_tanh_and_mul(
torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
void gelu_tanh_and_mul(torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
{
LAUNCH_ACTIVATION_GATE_KERNEL(vllm::gelu_tanh_kernel);
}
......@@ -96,11 +90,11 @@ void gelu_tanh_and_mul(
namespace vllm {
// Element-wise activation kernel template.
template<typename scalar_t, scalar_t (*ACT_FN)(const scalar_t&)>
template <typename scalar_t, scalar_t (*ACT_FN)(const scalar_t&)>
__global__ void activation_kernel(
scalar_t* __restrict__ out, // [..., d]
const scalar_t* __restrict__ input, // [..., d]
const int d) {
scalar_t* __restrict__ out, // [..., d]
const scalar_t* __restrict__ input, // [..., d]
const int d) {
const int64_t token_idx = blockIdx.x;
for (int64_t idx = threadIdx.x; idx < d; idx += blockDim.x) {
const scalar_t x = VLLM_LDG(&input[token_idx * d + idx]);
......@@ -108,54 +102,49 @@ __global__ void activation_kernel(
}
}
} // namespace vllm
} // namespace vllm
// Launch element-wise activation kernel.
#define LAUNCH_ACTIVATION_KERNEL(KERNEL) \
int d = input.size(-1); \
int64_t num_tokens = input.numel() / d; \
dim3 grid(num_tokens); \
dim3 block(std::min(d, 1024)); \
const at::cuda::OptionalCUDAGuard device_guard(device_of(input)); \
const cudaStream_t stream = at::cuda::getCurrentCUDAStream(); \
VLLM_DISPATCH_FLOATING_TYPES( \
input.scalar_type(), \
"activation_kernel", \
[&] { \
vllm::activation_kernel<scalar_t, KERNEL<scalar_t>><<<grid, block, 0, stream>>>( \
out.data_ptr<scalar_t>(), \
input.data_ptr<scalar_t>(), \
d); \
});
#define LAUNCH_ACTIVATION_KERNEL(KERNEL) \
int d = input.size(-1); \
int64_t num_tokens = input.numel() / d; \
dim3 grid(num_tokens); \
dim3 block(std::min(d, 1024)); \
const at::cuda::OptionalCUDAGuard device_guard(device_of(input)); \
const cudaStream_t stream = at::cuda::getCurrentCUDAStream(); \
VLLM_DISPATCH_FLOATING_TYPES(input.scalar_type(), "activation_kernel", [&] { \
vllm::activation_kernel<scalar_t, KERNEL<scalar_t>> \
<<<grid, block, 0, stream>>>(out.data_ptr<scalar_t>(), \
input.data_ptr<scalar_t>(), d); \
});
namespace vllm {
template<typename T>
template <typename T>
__device__ __forceinline__ T gelu_new_kernel(const T& x) {
const float x3 = (float) (x * x * x);
const T t = (T) tanhf((T) (0.79788456f * (float) (x + (T) (0.044715f * x3))));
return ((T) 0.5) * x * (((T) 1.0) + t);
const float x3 = (float)(x * x * x);
const T t = (T)tanhf((T)(0.79788456f * (float)(x + (T)(0.044715f * x3))));
return ((T)0.5) * x * (((T)1.0) + t);
}
template<typename T>
template <typename T>
__device__ __forceinline__ T gelu_fast_kernel(const T& x) {
const float f = (float) x;
const T t = (T) tanhf(((T) (f * 0.79788456f)) * (((T) 1.0) + (T) (0.044715f * f) * x));
return ((T) 0.5) * x * (((T) 1.0) + t);
const float f = (float)x;
const T t =
(T)tanhf(((T)(f * 0.79788456f)) * (((T)1.0) + (T)(0.044715f * f) * x));
return ((T)0.5) * x * (((T)1.0) + t);
}
} // namespace vllm
} // namespace vllm
void gelu_new(
torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., d]
void gelu_new(torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., d]
{
LAUNCH_ACTIVATION_KERNEL(vllm::gelu_new_kernel);
}
void gelu_fast(
torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., d]
void gelu_fast(torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., d]
{
LAUNCH_ACTIVATION_KERNEL(vllm::gelu_fast_kernel);
}
csrc/attention/attention_generic.cuh
View file @ 5f6d10c1
/*
* Adapted from https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Adapted from
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Copyright (c) 2023, The vLLM team.
* Copyright (c) 2020-2023, NVIDIA CORPORATION. All rights reserved.
*
......@@ -22,31 +23,31 @@
namespace vllm {
// A vector type to store Q, K, V elements.
template<typename T, int VEC_SIZE>
template <typename T, int VEC_SIZE>
struct Vec {};
// A vector type to store FP32 accumulators.
template<typename T>
template <typename T>
struct FloatVec {};
// Template vector operations.
template<typename Acc, typename A, typename B>
template <typename Acc, typename A, typename B>
inline __device__ Acc mul(A a, B b);
template<typename T>
template <typename T>
inline __device__ float sum(T v);
template<typename T>
template <typename T>
inline __device__ float dot(T a, T b) {
return sum(mul<T, T, T>(a, b));
}
template<typename A, typename T>
template <typename A, typename T>
inline __device__ float dot(T a, T b) {
return sum(mul<A, T, T>(a, b));
}
template<typename T>
template <typename T>
inline __device__ void zero(T& dst) {
constexpr int WORDS = sizeof(T) / 4;
union {
......@@ -61,4 +62,4 @@ inline __device__ void zero(T& dst) {
dst = tmp.raw;
}
} // namespace vllm
} // namespace vllm
csrc/attention/attention_kernels.cu
View file @ 5f6d10c1
/*
* Adapted from https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* Adapted from
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* Copyright (c) 2023, The vLLM team.
* Copyright (c) 2020-2023, NVIDIA CORPORATION. All rights reserved.
*
......@@ -27,15 +28,15 @@
#ifdef USE_ROCM
#include <hip/hip_bf16.h>
#include "../quantization/fp8/amd/quant_utils.cuh"
typedef __hip_bfloat16 __nv_bfloat16;
typedef __hip_bfloat16 __nv_bfloat16;
#else
#include "../quantization/fp8/nvidia/quant_utils.cuh"
#endif
#ifndef USE_ROCM
#define WARP_SIZE 32
#define WARP_SIZE 32
#else
#define WARP_SIZE warpSize
#define WARP_SIZE warpSize
#endif
#define MAX(a, b) ((a) > (b) ? (a) : (b))
......@@ -45,7 +46,7 @@
namespace vllm {
// Utility function for attention softmax.
template<int NUM_WARPS>
template <int NUM_WARPS>
inline __device__ float block_sum(float* red_smem, float sum) {
// Decompose the thread index into warp / lane.
int warp = threadIdx.x / WARP_SIZE;
......@@ -82,31 +83,28 @@ inline __device__ float block_sum(float* red_smem, float sum) {
// TODO(woosuk): Merge the last two dimensions of the grid.
// Grid: (num_heads, num_seqs, max_num_partitions).
template<
typename scalar_t,
typename cache_t,
int HEAD_SIZE,
int BLOCK_SIZE,
int NUM_THREADS,
vllm::Fp8KVCacheDataType KV_DTYPE,
int PARTITION_SIZE = 0> // Zero means no partitioning.
template <typename scalar_t, typename cache_t, int HEAD_SIZE, int BLOCK_SIZE,
int NUM_THREADS, vllm::Fp8KVCacheDataType KV_DTYPE,
int PARTITION_SIZE = 0> // Zero means no partitioning.
__device__ void paged_attention_kernel(
float* __restrict__ exp_sums, // [num_seqs, num_heads, max_num_partitions]
float* __restrict__ max_logits, // [num_seqs, num_heads, max_num_partitions]
scalar_t* __restrict__ out, // [num_seqs, num_heads, max_num_partitions, head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const cache_t* __restrict__ k_cache, // [num_blocks, num_kv_heads, head_size/x, block_size, x]
const cache_t* __restrict__ v_cache, // [num_blocks, num_kv_heads, head_size, block_size]
const int num_kv_heads, // [num_heads]
const float scale,
const int* __restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride,
const int kv_block_stride,
const int kv_head_stride,
const float kv_scale) {
float* __restrict__ exp_sums, // [num_seqs, num_heads, max_num_partitions]
float* __restrict__ max_logits, // [num_seqs, num_heads,
// max_num_partitions]
scalar_t* __restrict__ out, // [num_seqs, num_heads, max_num_partitions,
// head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const cache_t* __restrict__ k_cache, // [num_blocks, num_kv_heads,
// head_size/x, block_size, x]
const cache_t* __restrict__ v_cache, // [num_blocks, num_kv_heads,
// head_size, block_size]
const int num_kv_heads, // [num_heads]
const float scale,
const int* __restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride, const int kv_block_stride, const int kv_head_stride,
const float kv_scale) {
const int seq_idx = blockIdx.y;
const int partition_idx = blockIdx.z;
const int max_num_partitions = gridDim.z;
......@@ -118,22 +116,29 @@ __device__ void paged_attention_kernel(
}
const int num_seq_blocks = DIVIDE_ROUND_UP(seq_len, BLOCK_SIZE);
const int num_blocks_per_partition = USE_PARTITIONING ? PARTITION_SIZE / BLOCK_SIZE : num_seq_blocks;
const int num_blocks_per_partition =
USE_PARTITIONING ? PARTITION_SIZE / BLOCK_SIZE : num_seq_blocks;
// [start_block_idx, end_block_idx) is the range of blocks to process.
const int start_block_idx = USE_PARTITIONING ? partition_idx * num_blocks_per_partition : 0;
const int end_block_idx = MIN(start_block_idx + num_blocks_per_partition, num_seq_blocks);
const int start_block_idx =
USE_PARTITIONING ? partition_idx * num_blocks_per_partition : 0;
const int end_block_idx =
MIN(start_block_idx + num_blocks_per_partition, num_seq_blocks);
const int num_blocks = end_block_idx - start_block_idx;
// [start_token_idx, end_token_idx) is the range of tokens to process.
const int start_token_idx = start_block_idx * BLOCK_SIZE;
const int end_token_idx = MIN(start_token_idx + num_blocks * BLOCK_SIZE, seq_len);
const int end_token_idx =
MIN(start_token_idx + num_blocks * BLOCK_SIZE, seq_len);
const int num_tokens = end_token_idx - start_token_idx;
constexpr int THREAD_GROUP_SIZE = MAX(WARP_SIZE / BLOCK_SIZE, 1);
constexpr int NUM_THREAD_GROUPS = NUM_THREADS / THREAD_GROUP_SIZE; // Note: This assumes THREAD_GROUP_SIZE divides NUM_THREADS
constexpr int NUM_THREAD_GROUPS =
NUM_THREADS / THREAD_GROUP_SIZE; // Note: This assumes THREAD_GROUP_SIZE
// divides NUM_THREADS
assert(NUM_THREADS % THREAD_GROUP_SIZE == 0);
constexpr int NUM_TOKENS_PER_THREAD_GROUP = DIVIDE_ROUND_UP(BLOCK_SIZE, WARP_SIZE);
constexpr int NUM_TOKENS_PER_THREAD_GROUP =
DIVIDE_ROUND_UP(BLOCK_SIZE, WARP_SIZE);
constexpr int NUM_WARPS = NUM_THREADS / WARP_SIZE;
const int thread_idx = threadIdx.x;
const int warp_idx = thread_idx / WARP_SIZE;
......@@ -143,13 +148,14 @@ __device__ void paged_attention_kernel(
const int num_heads = gridDim.x;
const int num_queries_per_kv = num_heads / num_kv_heads;
const int kv_head_idx = head_idx / num_queries_per_kv;
const float alibi_slope = alibi_slopes == nullptr ? 0.f : alibi_slopes[head_idx];
const float alibi_slope =
alibi_slopes == nullptr ? 0.f : alibi_slopes[head_idx];
// A vector type to store a part of a key or a query.
// The vector size is configured in such a way that the threads in a thread group
// fetch or compute 16 bytes at a time.
// For example, if the size of a thread group is 4 and the data type is half,
// then the vector size is 16 / (4 * sizeof(half)) == 2.
// The vector size is configured in such a way that the threads in a thread
// group fetch or compute 16 bytes at a time. For example, if the size of a
// thread group is 4 and the data type is half, then the vector size is 16 /
// (4 * sizeof(half)) == 2.
constexpr int VEC_SIZE = MAX(16 / (THREAD_GROUP_SIZE * sizeof(scalar_t)), 1);
using K_vec = typename Vec<scalar_t, VEC_SIZE>::Type;
using Q_vec = typename Vec<scalar_t, VEC_SIZE>::Type;
......@@ -163,18 +169,21 @@ __device__ void paged_attention_kernel(
// Load the query to registers.
// Each thread in a thread group has a different part of the query.
// For example, if the the thread group size is 4, then the first thread in the group
// has 0, 4, 8, ... th vectors of the query, and the second thread has 1, 5, 9, ...
// th vectors of the query, and so on.
// NOTE(woosuk): Because q is split from a qkv tensor, it may not be contiguous.
// For example, if the the thread group size is 4, then the first thread in
// the group has 0, 4, 8, ... th vectors of the query, and the second thread
// has 1, 5, 9, ... th vectors of the query, and so on. NOTE(woosuk): Because
// q is split from a qkv tensor, it may not be contiguous.
const scalar_t* q_ptr = q + seq_idx * q_stride + head_idx * HEAD_SIZE;
__shared__ Q_vec q_vecs[THREAD_GROUP_SIZE][NUM_VECS_PER_THREAD];
#pragma unroll
for (int i = thread_group_idx; i < NUM_VECS_PER_THREAD; i += NUM_THREAD_GROUPS) {
for (int i = thread_group_idx; i < NUM_VECS_PER_THREAD;
i += NUM_THREAD_GROUPS) {
const int vec_idx = thread_group_offset + i * THREAD_GROUP_SIZE;
q_vecs[thread_group_offset][i] = *reinterpret_cast<const Q_vec*>(q_ptr + vec_idx * VEC_SIZE);
q_vecs[thread_group_offset][i] =
*reinterpret_cast<const Q_vec*>(q_ptr + vec_idx * VEC_SIZE);
}
__syncthreads(); // TODO(naed90): possible speedup if this is replaced with a memory wall right before we use q_vecs
__syncthreads(); // TODO(naed90): possible speedup if this is replaced with a
// memory wall right before we use q_vecs
// Memory planning.
extern __shared__ char shared_mem[];
......@@ -193,44 +202,50 @@ __device__ void paged_attention_kernel(
// Each thread group in a warp fetches a key from the block, and computes
// dot product with the query.
const int* block_table = block_tables + seq_idx * max_num_blocks_per_seq;
for (int block_idx = start_block_idx + warp_idx; block_idx < end_block_idx; block_idx += NUM_WARPS) {
// NOTE(woosuk): The block number is stored in int32. However, we cast it to int64
// because int32 can lead to overflow when this variable is multiplied by large numbers
// (e.g., kv_block_stride).
const int64_t physical_block_number = static_cast<int64_t>(block_table[block_idx]);
for (int block_idx = start_block_idx + warp_idx; block_idx < end_block_idx;
block_idx += NUM_WARPS) {
// NOTE(woosuk): The block number is stored in int32. However, we cast it to
// int64 because int32 can lead to overflow when this variable is multiplied
// by large numbers (e.g., kv_block_stride).
const int64_t physical_block_number =
static_cast<int64_t>(block_table[block_idx]);
// Load a key to registers.
// Each thread in a thread group has a different part of the key.
// For example, if the the thread group size is 4, then the first thread in the group
// has 0, 4, 8, ... th vectors of the key, and the second thread has 1, 5, 9, ... th
// vectors of the key, and so on.
// For example, if the the thread group size is 4, then the first thread in
// the group has 0, 4, 8, ... th vectors of the key, and the second thread
// has 1, 5, 9, ... th vectors of the key, and so on.
for (int i = 0; i < NUM_TOKENS_PER_THREAD_GROUP; i++) {
const int physical_block_offset = (thread_group_idx + i * WARP_SIZE) % BLOCK_SIZE;
const int physical_block_offset =
(thread_group_idx + i * WARP_SIZE) % BLOCK_SIZE;
const int token_idx = block_idx * BLOCK_SIZE + physical_block_offset;
K_vec k_vecs[NUM_VECS_PER_THREAD];
#pragma unroll
for (int j = 0; j < NUM_VECS_PER_THREAD; j++) {
const cache_t* k_ptr = k_cache + physical_block_number * kv_block_stride
+ kv_head_idx * kv_head_stride
+ physical_block_offset * x;
const cache_t* k_ptr =
k_cache + physical_block_number * kv_block_stride +
kv_head_idx * kv_head_stride + physical_block_offset * x;
const int vec_idx = thread_group_offset + j * THREAD_GROUP_SIZE;
const int offset1 = (vec_idx * VEC_SIZE) / x;
const int offset2 = (vec_idx * VEC_SIZE) % x;
if constexpr (KV_DTYPE == Fp8KVCacheDataType::kAuto) {
k_vecs[j] = *reinterpret_cast<const K_vec*>(k_ptr + offset1 * BLOCK_SIZE * x + offset2);
k_vecs[j] = *reinterpret_cast<const K_vec*>(
k_ptr + offset1 * BLOCK_SIZE * x + offset2);
} else {
// Vector conversion from Quant_vec to K_vec.
Quant_vec k_vec_quant = *reinterpret_cast<const Quant_vec*>(
k_ptr + offset1 * BLOCK_SIZE * x + offset2);
k_vecs[j] = fp8::scaled_convert<K_vec, Quant_vec, KV_DTYPE>(k_vec_quant, kv_scale);
k_ptr + offset1 * BLOCK_SIZE * x + offset2);
k_vecs[j] = fp8::scaled_convert<K_vec, Quant_vec, KV_DTYPE>(
k_vec_quant, kv_scale);
}
}
// Compute dot product.
// This includes a reduction across the threads in the same thread group.
float qk = scale * Qk_dot<scalar_t, THREAD_GROUP_SIZE>::dot(q_vecs[thread_group_offset], k_vecs);
float qk = scale * Qk_dot<scalar_t, THREAD_GROUP_SIZE>::dot(
q_vecs[thread_group_offset], k_vecs);
// Add the ALiBi bias if slopes are given.
qk += (alibi_slope != 0) ? alibi_slope * (token_idx - seq_len + 1) : 0;
......@@ -285,13 +300,12 @@ __device__ void paged_attention_kernel(
// If partitioning is enabled, store the max logit and exp_sum.
if (USE_PARTITIONING && thread_idx == 0) {
float* max_logits_ptr = max_logits + seq_idx * num_heads * max_num_partitions
+ head_idx * max_num_partitions
+ partition_idx;
float* max_logits_ptr = max_logits +
seq_idx * num_heads * max_num_partitions +
head_idx * max_num_partitions + partition_idx;
*max_logits_ptr = qk_max;
float* exp_sums_ptr = exp_sums + seq_idx * num_heads * max_num_partitions
+ head_idx * max_num_partitions
+ partition_idx;
float* exp_sums_ptr = exp_sums + seq_idx * num_heads * max_num_partitions +
head_idx * max_num_partitions + partition_idx;
*exp_sums_ptr = exp_sum;
}
......@@ -304,7 +318,8 @@ __device__ void paged_attention_kernel(
constexpr int NUM_V_VECS_PER_ROW = BLOCK_SIZE / V_VEC_SIZE;
constexpr int NUM_ROWS_PER_ITER = WARP_SIZE / NUM_V_VECS_PER_ROW;
constexpr int NUM_ROWS_PER_THREAD = DIVIDE_ROUND_UP(HEAD_SIZE, NUM_ROWS_PER_ITER);
constexpr int NUM_ROWS_PER_THREAD =
DIVIDE_ROUND_UP(HEAD_SIZE, NUM_ROWS_PER_ITER);
// NOTE(woosuk): We use FP32 for the accumulator for better accuracy.
float accs[NUM_ROWS_PER_THREAD];
......@@ -315,18 +330,21 @@ __device__ void paged_attention_kernel(
scalar_t zero_value;
zero(zero_value);
for (int block_idx = start_block_idx + warp_idx; block_idx < end_block_idx; block_idx += NUM_WARPS) {
// NOTE(woosuk): The block number is stored in int32. However, we cast it to int64
// because int32 can lead to overflow when this variable is multiplied by large numbers
// (e.g., kv_block_stride).
const int64_t physical_block_number = static_cast<int64_t>(block_table[block_idx]);
for (int block_idx = start_block_idx + warp_idx; block_idx < end_block_idx;
block_idx += NUM_WARPS) {
// NOTE(woosuk): The block number is stored in int32. However, we cast it to
// int64 because int32 can lead to overflow when this variable is multiplied
// by large numbers (e.g., kv_block_stride).
const int64_t physical_block_number =
static_cast<int64_t>(block_table[block_idx]);
const int physical_block_offset = (lane % NUM_V_VECS_PER_ROW) * V_VEC_SIZE;
const int token_idx = block_idx * BLOCK_SIZE + physical_block_offset;
L_vec logits_vec;
from_float(logits_vec, *reinterpret_cast<Float_L_vec*>(logits + token_idx - start_token_idx));
from_float(logits_vec, *reinterpret_cast<Float_L_vec*>(logits + token_idx -
start_token_idx));
const cache_t* v_ptr = v_cache + physical_block_number * kv_block_stride
+ kv_head_idx * kv_head_stride;
const cache_t* v_ptr = v_cache + physical_block_number * kv_block_stride +
kv_head_idx * kv_head_stride;
#pragma unroll
for (int i = 0; i < NUM_ROWS_PER_THREAD; i++) {
const int row_idx = lane / NUM_V_VECS_PER_ROW + i * NUM_ROWS_PER_ITER;
......@@ -337,14 +355,17 @@ __device__ void paged_attention_kernel(
if constexpr (KV_DTYPE == Fp8KVCacheDataType::kAuto) {
v_vec = *reinterpret_cast<const V_vec*>(v_ptr + offset);
} else {
V_quant_vec v_quant_vec = *reinterpret_cast<const V_quant_vec*>(v_ptr + offset);
V_quant_vec v_quant_vec =
*reinterpret_cast<const V_quant_vec*>(v_ptr + offset);
// Vector conversion from V_quant_vec to V_vec.
v_vec = fp8::scaled_convert<V_vec, V_quant_vec, KV_DTYPE>(v_quant_vec, kv_scale);
v_vec = fp8::scaled_convert<V_vec, V_quant_vec, KV_DTYPE>(v_quant_vec,
kv_scale);
}
if (block_idx == num_seq_blocks - 1) {
// NOTE(woosuk): When v_vec contains the tokens that are out of the context,
// we should explicitly zero out the values since they may contain NaNs.
// See https://github.com/vllm-project/vllm/issues/641#issuecomment-1682544472
// NOTE(woosuk): When v_vec contains the tokens that are out of the
// context, we should explicitly zero out the values since they may
// contain NaNs. See
// https://github.com/vllm-project/vllm/issues/641#issuecomment-1682544472
scalar_t* v_vec_ptr = reinterpret_cast<scalar_t*>(&v_vec);
#pragma unroll
for (int j = 0; j < V_VEC_SIZE; j++) {
......@@ -367,8 +388,8 @@ __device__ void paged_attention_kernel(
accs[i] = acc;
}
// NOTE(woosuk): A barrier is required because the shared memory space for logits
// is reused for the output.
// NOTE(woosuk): A barrier is required because the shared memory space for
// logits is reused for the output.
__syncthreads();
// Perform reduction across warps.
......@@ -405,9 +426,9 @@ __device__ void paged_attention_kernel(
// Write the final output.
if (warp_idx == 0) {
scalar_t* out_ptr = out + seq_idx * num_heads * max_num_partitions * HEAD_SIZE
+ head_idx * max_num_partitions * HEAD_SIZE
+ partition_idx * HEAD_SIZE;
scalar_t* out_ptr =
out + seq_idx * num_heads * max_num_partitions * HEAD_SIZE +
head_idx * max_num_partitions * HEAD_SIZE + partition_idx * HEAD_SIZE;
#pragma unroll
for (int i = 0; i < NUM_ROWS_PER_THREAD; i++) {
const int row_idx = lane / NUM_V_VECS_PER_ROW + i * NUM_ROWS_PER_ITER;
......@@ -419,79 +440,75 @@ __device__ void paged_attention_kernel(
}
// Grid: (num_heads, num_seqs, 1).
template<
typename scalar_t,
typename cache_t,
int HEAD_SIZE,
int BLOCK_SIZE,
int NUM_THREADS,
vllm::Fp8KVCacheDataType KV_DTYPE>
template <typename scalar_t, typename cache_t, int HEAD_SIZE, int BLOCK_SIZE,
int NUM_THREADS,
vllm::Fp8KVCacheDataType KV_DTYPE>
__global__ void paged_attention_v1_kernel(
scalar_t* __restrict__ out, // [num_seqs, num_heads, head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const cache_t* __restrict__ k_cache, // [num_blocks, num_kv_heads, head_size/x, block_size, x]
const cache_t* __restrict__ v_cache, // [num_blocks, num_kv_heads, head_size, block_size]
const int num_kv_heads, // [num_heads]
const float scale,
const int* __restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride,
const int kv_block_stride,
const int kv_head_stride,
const float kv_scale) {
paged_attention_kernel<scalar_t, cache_t, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, KV_DTYPE>(
/* exp_sums */ nullptr, /* max_logits */ nullptr,
out, q, k_cache, v_cache, num_kv_heads, scale, block_tables, seq_lens,
max_num_blocks_per_seq, alibi_slopes, q_stride, kv_block_stride, kv_head_stride, kv_scale);
scalar_t* __restrict__ out, // [num_seqs, num_heads, head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const cache_t* __restrict__ k_cache, // [num_blocks, num_kv_heads,
// head_size/x, block_size, x]
const cache_t* __restrict__ v_cache, // [num_blocks, num_kv_heads,
// head_size, block_size]
const int num_kv_heads, // [num_heads]
const float scale,
const int* __restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride, const int kv_block_stride, const int kv_head_stride,
const float kv_scale) {
paged_attention_kernel<scalar_t, cache_t, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS,
KV_DTYPE>(
/* exp_sums */ nullptr, /* max_logits */ nullptr, out, q, k_cache,
v_cache, num_kv_heads, scale, block_tables, seq_lens,
max_num_blocks_per_seq, alibi_slopes, q_stride, kv_block_stride,
kv_head_stride, kv_scale);
}
// Grid: (num_heads, num_seqs, max_num_partitions).
template<
typename scalar_t,
typename cache_t,
int HEAD_SIZE,
int BLOCK_SIZE,
int NUM_THREADS,
vllm::Fp8KVCacheDataType KV_DTYPE,
int PARTITION_SIZE>
template <typename scalar_t, typename cache_t, int HEAD_SIZE, int BLOCK_SIZE,
int NUM_THREADS, vllm::Fp8KVCacheDataType KV_DTYPE,
int PARTITION_SIZE>
__global__ void paged_attention_v2_kernel(
float* __restrict__ exp_sums, // [num_seqs, num_heads, max_num_partitions]
float* __restrict__ max_logits, // [num_seqs, num_heads, max_num_partitions]
scalar_t* __restrict__ tmp_out, // [num_seqs, num_heads, max_num_partitions, head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const cache_t* __restrict__ k_cache, // [num_blocks, num_kv_heads, head_size/x, block_size, x]
const cache_t* __restrict__ v_cache, // [num_blocks, num_kv_heads, head_size, block_size]
const int num_kv_heads, // [num_heads]
const float scale,
const int* __restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride,
const int kv_block_stride,
const int kv_head_stride,
const float kv_scale) {
paged_attention_kernel<scalar_t, cache_t, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, KV_DTYPE, PARTITION_SIZE>(
exp_sums, max_logits, tmp_out, q, k_cache, v_cache, num_kv_heads, scale,
block_tables, seq_lens, max_num_blocks_per_seq, alibi_slopes,
q_stride, kv_block_stride, kv_head_stride, kv_scale);
float* __restrict__ exp_sums, // [num_seqs, num_heads, max_num_partitions]
float* __restrict__ max_logits, // [num_seqs, num_heads,
// max_num_partitions]
scalar_t* __restrict__ tmp_out, // [num_seqs, num_heads,
// max_num_partitions, head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const cache_t* __restrict__ k_cache, // [num_blocks, num_kv_heads,
// head_size/x, block_size, x]
const cache_t* __restrict__ v_cache, // [num_blocks, num_kv_heads,
// head_size, block_size]
const int num_kv_heads, // [num_heads]
const float scale,
const int* __restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride, const int kv_block_stride, const int kv_head_stride,
const float kv_scale) {
paged_attention_kernel<scalar_t, cache_t, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS,
KV_DTYPE, PARTITION_SIZE>(
exp_sums, max_logits, tmp_out, q, k_cache, v_cache, num_kv_heads, scale,
block_tables, seq_lens, max_num_blocks_per_seq, alibi_slopes, q_stride,
kv_block_stride, kv_head_stride, kv_scale);
}
// Grid: (num_heads, num_seqs).
template<
typename scalar_t,
int HEAD_SIZE,
int NUM_THREADS,
int PARTITION_SIZE>
template <typename scalar_t, int HEAD_SIZE, int NUM_THREADS,
int PARTITION_SIZE>
__global__ void paged_attention_v2_reduce_kernel(
scalar_t* __restrict__ out, // [num_seqs, num_heads, head_size]
const float* __restrict__ exp_sums, // [num_seqs, num_heads, max_num_partitions]
const float* __restrict__ max_logits, // [num_seqs, num_heads, max_num_partitions]
const scalar_t* __restrict__ tmp_out, // [num_seqs, num_heads, max_num_partitions, head_size]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_partitions) {
scalar_t* __restrict__ out, // [num_seqs, num_heads, head_size]
const float* __restrict__ exp_sums, // [num_seqs, num_heads,
// max_num_partitions]
const float* __restrict__ max_logits, // [num_seqs, num_heads,
// max_num_partitions]
const scalar_t* __restrict__ tmp_out, // [num_seqs, num_heads,
// max_num_partitions, head_size]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_partitions) {
const int num_heads = gridDim.x;
const int head_idx = blockIdx.x;
const int seq_idx = blockIdx.y;
......@@ -499,9 +516,11 @@ __global__ void paged_attention_v2_reduce_kernel(
const int num_partitions = DIVIDE_ROUND_UP(seq_len, PARTITION_SIZE);
if (num_partitions == 1) {
// No need to reduce. Only copy tmp_out to out.
scalar_t* out_ptr = out + seq_idx * num_heads * HEAD_SIZE + head_idx * HEAD_SIZE;
const scalar_t* tmp_out_ptr = tmp_out + seq_idx * num_heads * max_num_partitions * HEAD_SIZE
+ head_idx * max_num_partitions * HEAD_SIZE;
scalar_t* out_ptr =
out + seq_idx * num_heads * HEAD_SIZE + head_idx * HEAD_SIZE;
const scalar_t* tmp_out_ptr =
tmp_out + seq_idx * num_heads * max_num_partitions * HEAD_SIZE +
head_idx * max_num_partitions * HEAD_SIZE;
for (int i = threadIdx.x; i < HEAD_SIZE; i += blockDim.x) {
out_ptr[i] = tmp_out_ptr[i];
}
......@@ -520,8 +539,9 @@ __global__ void paged_attention_v2_reduce_kernel(
// Load max logits to shared memory.
float* shared_max_logits = reinterpret_cast<float*>(shared_mem);
const float* max_logits_ptr = max_logits + seq_idx * num_heads * max_num_partitions
+ head_idx * max_num_partitions;
const float* max_logits_ptr = max_logits +
seq_idx * num_heads * max_num_partitions +
head_idx * max_num_partitions;
float max_logit = -FLT_MAX;
for (int i = threadIdx.x; i < num_partitions; i += blockDim.x) {
const float l = max_logits_ptr[i];
......@@ -550,9 +570,11 @@ __global__ void paged_attention_v2_reduce_kernel(
max_logit = VLLM_SHFL_SYNC(max_logit, 0);
// Load rescaled exp sums to shared memory.
float* shared_exp_sums = reinterpret_cast<float*>(shared_mem + sizeof(float) * num_partitions);
const float* exp_sums_ptr = exp_sums + seq_idx * num_heads * max_num_partitions
+ head_idx * max_num_partitions;
float* shared_exp_sums =
reinterpret_cast<float*>(shared_mem + sizeof(float) * num_partitions);
const float* exp_sums_ptr = exp_sums +
seq_idx * num_heads * max_num_partitions +
head_idx * max_num_partitions;
float global_exp_sum = 0.0f;
for (int i = threadIdx.x; i < num_partitions; i += blockDim.x) {
float l = shared_max_logits[i];
......@@ -565,61 +587,45 @@ __global__ void paged_attention_v2_reduce_kernel(
const float inv_global_exp_sum = __fdividef(1.0f, global_exp_sum + 1e-6f);
// Aggregate tmp_out to out.
const scalar_t* tmp_out_ptr = tmp_out + seq_idx * num_heads * max_num_partitions * HEAD_SIZE
+ head_idx * max_num_partitions * HEAD_SIZE;
scalar_t* out_ptr = out + seq_idx * num_heads * HEAD_SIZE + head_idx * HEAD_SIZE;
const scalar_t* tmp_out_ptr =
tmp_out + seq_idx * num_heads * max_num_partitions * HEAD_SIZE +
head_idx * max_num_partitions * HEAD_SIZE;
scalar_t* out_ptr =
out + seq_idx * num_heads * HEAD_SIZE + head_idx * HEAD_SIZE;
#pragma unroll
for (int i = threadIdx.x; i < HEAD_SIZE; i += NUM_THREADS) {
float acc = 0.0f;
for (int j = 0; j < num_partitions; ++j) {
acc += to_float(tmp_out_ptr[j * HEAD_SIZE + i]) * shared_exp_sums[j] * inv_global_exp_sum;
acc += to_float(tmp_out_ptr[j * HEAD_SIZE + i]) * shared_exp_sums[j] *
inv_global_exp_sum;
}
from_float(out_ptr[i], acc);
}
}
} // namespace vllm
#define LAUNCH_PAGED_ATTENTION_V1(HEAD_SIZE) \
VLLM_DevFuncAttribute_SET_MaxDynamicSharedMemorySize( \
((void*)vllm::paged_attention_v1_kernel<T, CACHE_T, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, \
KV_DTYPE>), shared_mem_size); \
vllm::paged_attention_v1_kernel<T, CACHE_T, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, \
KV_DTYPE><<<grid, block, shared_mem_size, stream>>>( \
out_ptr, \
query_ptr, \
key_cache_ptr, \
value_cache_ptr, \
num_kv_heads, \
scale, \
block_tables_ptr, \
seq_lens_ptr, \
max_num_blocks_per_seq, \
alibi_slopes_ptr, \
q_stride, \
kv_block_stride, \
kv_head_stride, \
kv_scale);
} // namespace vllm
#define LAUNCH_PAGED_ATTENTION_V1(HEAD_SIZE) \
VLLM_DevFuncAttribute_SET_MaxDynamicSharedMemorySize( \
((void*)vllm::paged_attention_v1_kernel< \
T, CACHE_T, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, KV_DTYPE>), \
shared_mem_size); \
vllm::paged_attention_v1_kernel<T, CACHE_T, HEAD_SIZE, BLOCK_SIZE, \
NUM_THREADS, KV_DTYPE> \
<<<grid, block, shared_mem_size, stream>>>( \
out_ptr, query_ptr, key_cache_ptr, value_cache_ptr, num_kv_heads, \
scale, block_tables_ptr, seq_lens_ptr, max_num_blocks_per_seq, \
alibi_slopes_ptr, q_stride, kv_block_stride, kv_head_stride, \
kv_scale);
// TODO(woosuk): Tune NUM_THREADS.
template<
typename T,
typename CACHE_T,
int BLOCK_SIZE,
vllm::Fp8KVCacheDataType KV_DTYPE,
int NUM_THREADS = 128>
template <typename T, typename CACHE_T, int BLOCK_SIZE,
vllm::Fp8KVCacheDataType KV_DTYPE, int NUM_THREADS = 128>
void paged_attention_v1_launcher(
torch::Tensor& out,
torch::Tensor& query,
torch::Tensor& key_cache,
torch::Tensor& value_cache,
int num_kv_heads,
float scale,
torch::Tensor& block_tables,
torch::Tensor& seq_lens,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
float kv_scale) {
torch::Tensor& out, torch::Tensor& query, torch::Tensor& key_cache,
torch::Tensor& value_cache, int num_kv_heads, float scale,
torch::Tensor& block_tables, torch::Tensor& seq_lens, int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes, float kv_scale) {
int num_seqs = query.size(0);
int num_heads = query.size(1);
int head_size = query.size(2);
......@@ -632,9 +638,10 @@ void paged_attention_v1_launcher(
assert(head_size % thread_group_size == 0);
// NOTE: alibi_slopes is optional.
const float* alibi_slopes_ptr = alibi_slopes ?
reinterpret_cast<const float*>(alibi_slopes.value().data_ptr())
: nullptr;
const float* alibi_slopes_ptr =
alibi_slopes
? reinterpret_cast<const float*>(alibi_slopes.value().data_ptr())
: nullptr;
T* out_ptr = reinterpret_cast<T*>(out.data_ptr());
T* query_ptr = reinterpret_cast<T*>(query.data_ptr());
......@@ -644,7 +651,8 @@ void paged_attention_v1_launcher(
int* seq_lens_ptr = seq_lens.data_ptr<int>();
constexpr int NUM_WARPS = NUM_THREADS / WARP_SIZE;
int padded_max_seq_len = DIVIDE_ROUND_UP(max_seq_len, BLOCK_SIZE) * BLOCK_SIZE;
int padded_max_seq_len =
DIVIDE_ROUND_UP(max_seq_len, BLOCK_SIZE) * BLOCK_SIZE;
int logits_size = padded_max_seq_len * sizeof(float);
int outputs_size = (NUM_WARPS / 2) * head_size * sizeof(float);
// Python-side check in vllm.worker.worker._check_if_can_support_max_seq_len
......@@ -683,19 +691,10 @@ void paged_attention_v1_launcher(
}
}
#define CALL_V1_LAUNCHER(T, CACHE_T, BLOCK_SIZE, KV_DTYPE) \
paged_attention_v1_launcher<T, CACHE_T, BLOCK_SIZE, KV_DTYPE>( \
out, \
query, \
key_cache, \
value_cache, \
num_kv_heads, \
scale, \
block_tables, \
seq_lens, \
max_seq_len, \
alibi_slopes, \
kv_scale);
#define CALL_V1_LAUNCHER(T, CACHE_T, BLOCK_SIZE, KV_DTYPE) \
paged_attention_v1_launcher<T, CACHE_T, BLOCK_SIZE, KV_DTYPE>( \
out, query, key_cache, value_cache, num_kv_heads, scale, block_tables, \
seq_lens, max_seq_len, alibi_slopes, kv_scale);
// NOTE(woosuk): To reduce the compilation time, we omitted block sizes
// 1, 2, 4, 64, 128, 256.
......@@ -716,74 +715,45 @@ void paged_attention_v1_launcher(
}
void paged_attention_v1(
torch::Tensor& out, // [num_seqs, num_heads, head_size]
torch::Tensor& query, // [num_seqs, num_heads, head_size]
torch::Tensor& key_cache, // [num_blocks, num_heads, head_size/x, block_size, x]
torch::Tensor& value_cache, // [num_blocks, num_heads, head_size, block_size]
int num_kv_heads, // [num_heads]
float scale,
torch::Tensor& block_tables, // [num_seqs, max_num_blocks_per_seq]
torch::Tensor& seq_lens, // [num_seqs]
int block_size,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype,
float kv_scale) {
DISPATCH_BY_KV_CACHE_DTYPE(query.dtype(), kv_cache_dtype, CALL_V1_LAUNCHER_BLOCK_SIZE)
}
#define LAUNCH_PAGED_ATTENTION_V2(HEAD_SIZE) \
vllm::paged_attention_v2_kernel<T, CACHE_T, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, \
KV_DTYPE, PARTITION_SIZE> \
<<<grid, block, shared_mem_size, stream>>>( \
exp_sums_ptr, \
max_logits_ptr, \
tmp_out_ptr, \
query_ptr, \
key_cache_ptr, \
value_cache_ptr, \
num_kv_heads, \
scale, \
block_tables_ptr, \
seq_lens_ptr, \
max_num_blocks_per_seq, \
alibi_slopes_ptr, \
q_stride, \
kv_block_stride, \
kv_head_stride, \
kv_scale); \
vllm::paged_attention_v2_reduce_kernel<T, HEAD_SIZE, NUM_THREADS, PARTITION_SIZE> \
<<<reduce_grid, block, reduce_shared_mem_size, stream>>>( \
out_ptr, \
exp_sums_ptr, \
max_logits_ptr, \
tmp_out_ptr, \
seq_lens_ptr, \
max_num_partitions);
template<
typename T,
typename CACHE_T,
int BLOCK_SIZE,
vllm::Fp8KVCacheDataType KV_DTYPE,
int NUM_THREADS = 128,
int PARTITION_SIZE = 512>
torch::Tensor& out, // [num_seqs, num_heads, head_size]
torch::Tensor& query, // [num_seqs, num_heads, head_size]
torch::Tensor&
key_cache, // [num_blocks, num_heads, head_size/x, block_size, x]
torch::Tensor&
value_cache, // [num_blocks, num_heads, head_size, block_size]
int num_kv_heads, // [num_heads]
float scale,
torch::Tensor& block_tables, // [num_seqs, max_num_blocks_per_seq]
torch::Tensor& seq_lens, // [num_seqs]
int block_size, int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype, float kv_scale){
DISPATCH_BY_KV_CACHE_DTYPE(query.dtype(), kv_cache_dtype,
CALL_V1_LAUNCHER_BLOCK_SIZE)}
#define LAUNCH_PAGED_ATTENTION_V2(HEAD_SIZE) \
vllm::paged_attention_v2_kernel<T, CACHE_T, HEAD_SIZE, BLOCK_SIZE, \
NUM_THREADS, KV_DTYPE, PARTITION_SIZE> \
<<<grid, block, shared_mem_size, stream>>>( \
exp_sums_ptr, max_logits_ptr, tmp_out_ptr, query_ptr, key_cache_ptr, \
value_cache_ptr, num_kv_heads, scale, block_tables_ptr, \
seq_lens_ptr, max_num_blocks_per_seq, alibi_slopes_ptr, q_stride, \
kv_block_stride, kv_head_stride, kv_scale); \
vllm::paged_attention_v2_reduce_kernel<T, HEAD_SIZE, NUM_THREADS, \
PARTITION_SIZE> \
<<<reduce_grid, block, reduce_shared_mem_size, stream>>>( \
out_ptr, exp_sums_ptr, max_logits_ptr, tmp_out_ptr, seq_lens_ptr, \
max_num_partitions);
template <typename T, typename CACHE_T, int BLOCK_SIZE,
vllm::Fp8KVCacheDataType KV_DTYPE, int NUM_THREADS = 128,
int PARTITION_SIZE = 512>
void paged_attention_v2_launcher(
torch::Tensor& out,
torch::Tensor& exp_sums,
torch::Tensor& max_logits,
torch::Tensor& tmp_out,
torch::Tensor& query,
torch::Tensor& key_cache,
torch::Tensor& value_cache,
int num_kv_heads,
float scale,
torch::Tensor& block_tables,
torch::Tensor& seq_lens,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
float kv_scale) {
torch::Tensor& out, torch::Tensor& exp_sums, torch::Tensor& max_logits,
torch::Tensor& tmp_out, torch::Tensor& query, torch::Tensor& key_cache,
torch::Tensor& value_cache, int num_kv_heads, float scale,
torch::Tensor& block_tables, torch::Tensor& seq_lens, int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes, float kv_scale) {
int num_seqs = query.size(0);
int num_heads = query.size(1);
int head_size = query.size(2);
......@@ -796,9 +766,10 @@ void paged_attention_v2_launcher(
assert(head_size % thread_group_size == 0);
// NOTE: alibi_slopes is optional.
const float* alibi_slopes_ptr = alibi_slopes ?
reinterpret_cast<const float*>(alibi_slopes.value().data_ptr())
: nullptr;
const float* alibi_slopes_ptr =
alibi_slopes
? reinterpret_cast<const float*>(alibi_slopes.value().data_ptr())
: nullptr;
T* out_ptr = reinterpret_cast<T*>(out.data_ptr());
float* exp_sums_ptr = reinterpret_cast<float*>(exp_sums.data_ptr());
......@@ -853,59 +824,50 @@ void paged_attention_v2_launcher(
}
}
#define CALL_V2_LAUNCHER(T, CACHE_T, BLOCK_SIZE, KV_DTYPE) \
paged_attention_v2_launcher<T, CACHE_T, BLOCK_SIZE, KV_DTYPE>( \
out, \
exp_sums, \
max_logits, \
tmp_out, \
query, \
key_cache, \
value_cache, \
num_kv_heads, \
scale, \
block_tables, \
seq_lens, \
max_seq_len, \
alibi_slopes, \
kv_scale);
#define CALL_V2_LAUNCHER(T, CACHE_T, BLOCK_SIZE, KV_DTYPE) \
paged_attention_v2_launcher<T, CACHE_T, BLOCK_SIZE, KV_DTYPE>( \
out, exp_sums, max_logits, tmp_out, query, key_cache, value_cache, \
num_kv_heads, scale, block_tables, seq_lens, max_seq_len, alibi_slopes, \
kv_scale);
// NOTE(woosuk): To reduce the compilation time, we omitted block sizes
// 1, 2, 4, 64, 128, 256.
#define CALL_V2_LAUNCHER_BLOCK_SIZE(T, CACHE_T, KV_DTYPE) \
switch (block_size) { \
case 8: \
CALL_V2_LAUNCHER(T, CACHE_T, 8, KV_DTYPE); \
break; \
case 16: \
CALL_V2_LAUNCHER(T, CACHE_T, 16, KV_DTYPE); \
break; \
case 32: \
CALL_V2_LAUNCHER(T, CACHE_T, 32, KV_DTYPE); \
break; \
default: \
TORCH_CHECK(false, "Unsupported block size: ", block_size); \
break; \
#define CALL_V2_LAUNCHER_BLOCK_SIZE(T, CACHE_T, KV_DTYPE) \
switch (block_size) { \
case 8: \
CALL_V2_LAUNCHER(T, CACHE_T, 8, KV_DTYPE); \
break; \
case 16: \
CALL_V2_LAUNCHER(T, CACHE_T, 16, KV_DTYPE); \
break; \
case 32: \
CALL_V2_LAUNCHER(T, CACHE_T, 32, KV_DTYPE); \
break; \
default: \
TORCH_CHECK(false, "Unsupported block size: ", block_size); \
break; \
}
void paged_attention_v2(
torch::Tensor& out, // [num_seqs, num_heads, head_size]
torch::Tensor& exp_sums, // [num_seqs, num_heads, max_num_partitions]
torch::Tensor& max_logits, // [num_seqs, num_heads, max_num_partitions]
torch::Tensor& tmp_out, // [num_seqs, num_heads, max_num_partitions, head_size]
torch::Tensor& query, // [num_seqs, num_heads, head_size]
torch::Tensor& key_cache, // [num_blocks, num_heads, head_size/x, block_size, x]
torch::Tensor& value_cache, // [num_blocks, num_heads, head_size, block_size]
int num_kv_heads, // [num_heads]
float scale,
torch::Tensor& block_tables, // [num_seqs, max_num_blocks_per_seq]
torch::Tensor& seq_lens, // [num_seqs]
int block_size,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype,
float kv_scale) {
DISPATCH_BY_KV_CACHE_DTYPE(query.dtype(), kv_cache_dtype, CALL_V2_LAUNCHER_BLOCK_SIZE)
torch::Tensor& out, // [num_seqs, num_heads, head_size]
torch::Tensor& exp_sums, // [num_seqs, num_heads, max_num_partitions]
torch::Tensor& max_logits, // [num_seqs, num_heads, max_num_partitions]
torch::Tensor&
tmp_out, // [num_seqs, num_heads, max_num_partitions, head_size]
torch::Tensor& query, // [num_seqs, num_heads, head_size]
torch::Tensor&
key_cache, // [num_blocks, num_heads, head_size/x, block_size, x]
torch::Tensor&
value_cache, // [num_blocks, num_heads, head_size, block_size]
int num_kv_heads, // [num_heads]
float scale,
torch::Tensor& block_tables, // [num_seqs, max_num_blocks_per_seq]
torch::Tensor& seq_lens, // [num_seqs]
int block_size, int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype, float kv_scale) {
DISPATCH_BY_KV_CACHE_DTYPE(query.dtype(), kv_cache_dtype,
CALL_V2_LAUNCHER_BLOCK_SIZE)
}
#undef WARP_SIZE
......
csrc/attention/attention_utils.cuh
View file @ 5f6d10c1
/*
* Adapted from https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* Adapted from
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* Copyright (c) 2023, The vLLM team.
* Copyright (c) 2020-2023, NVIDIA CORPORATION. All rights reserved.
*
......@@ -26,7 +27,7 @@
namespace vllm {
// Q*K^T operation.
template<int THREAD_GROUP_SIZE, typename Vec, int N>
template <int THREAD_GROUP_SIZE, typename Vec, int N>
inline __device__ float qk_dot_(const Vec (&q)[N], const Vec (&k)[N]) {
using A_vec = typename FloatVec<Vec>::Type;
// Compute the parallel products for Q*K^T (treat vector lanes separately).
......@@ -45,12 +46,12 @@ inline __device__ float qk_dot_(const Vec (&q)[N], const Vec (&k)[N]) {
return qk;
}
template<typename T, int THREAD_GROUP_SIZE>
template <typename T, int THREAD_GROUP_SIZE>
struct Qk_dot {
template<typename Vec, int N>
template <typename Vec, int N>
static inline __device__ float dot(const Vec (&q)[N], const Vec (&k)[N]) {
return qk_dot_<THREAD_GROUP_SIZE>(q, k);
}
};
} // namespace vllm
} // namespace vllm
csrc/attention/dtype_bfloat16.cuh
View file @ 5f6d10c1
/*
* Adapted from https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* and https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Adapted from
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* and
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Copyright (c) 2023, The vLLM team.
* Copyright (c) 2020-2023, NVIDIA CORPORATION. All rights reserved.
*
......@@ -28,8 +30,8 @@
#include <hip/hip_bf16.h>
#include <hip/hip_fp16.h>
typedef __hip_bfloat162 __nv_bfloat162;
typedef __hip_bfloat16 __nv_bfloat16;
typedef __hip_bfloat162 __nv_bfloat162;
typedef __hip_bfloat16 __nv_bfloat16;
#endif
#include <stdint.h>
......@@ -50,37 +52,37 @@ struct bf16_8_t {
};
// BF16 vector types for Q, K, V.
template<>
template <>
struct Vec<__nv_bfloat16, 1> {
using Type = __nv_bfloat16;
};
template<>
template <>
struct Vec<__nv_bfloat16, 2> {
using Type = __nv_bfloat162;
};
template<>
template <>
struct Vec<__nv_bfloat16, 4> {
using Type = bf16_4_t;
};
template<>
template <>
struct Vec<__nv_bfloat16, 8> {
using Type = bf16_8_t;
};
// FP32 accumulator vector types corresponding to Vec.
template<>
template <>
struct FloatVec<__nv_bfloat16> {
using Type = float;
};
template<>
template <>
struct FloatVec<__nv_bfloat162> {
using Type = float2;
};
template<>
template <>
struct FloatVec<bf16_4_t> {
using Type = Float4_;
};
template<>
template <>
struct FloatVec<bf16_8_t> {
using Type = Float8_;
};
......@@ -108,9 +110,9 @@ inline __device__ __nv_bfloat16 add(__nv_bfloat16 a, __nv_bfloat16 b) {
assert(false);
#else
#ifndef USE_ROCM
return a + b;
return a + b;
#else
return __hadd(a, b);
return __hadd(a, b);
#endif
#endif
}
......@@ -161,7 +163,7 @@ inline __device__ Float8_ add(bf16_8_t a, Float8_ fb) {
}
// Vector multiplication.
template<>
template <>
inline __device__ __nv_bfloat16 mul(__nv_bfloat16 a, __nv_bfloat16 b) {
#if defined(__CUDA_ARCH__) && __CUDA_ARCH__ < 800
assert(false);
......@@ -170,7 +172,7 @@ inline __device__ __nv_bfloat16 mul(__nv_bfloat16 a, __nv_bfloat16 b) {
#endif
}
template<>
template <>
inline __device__ __nv_bfloat162 mul(__nv_bfloat162 a, __nv_bfloat162 b) {
#if defined(__CUDA_ARCH__) && __CUDA_ARCH__ < 800
assert(false);
......@@ -179,12 +181,12 @@ inline __device__ __nv_bfloat162 mul(__nv_bfloat162 a, __nv_bfloat162 b) {
#endif
}
template<>
template <>
inline __device__ __nv_bfloat162 mul(__nv_bfloat16 a, __nv_bfloat162 b) {
return mul<__nv_bfloat162, __nv_bfloat162, __nv_bfloat162>(bf162bf162(a), b);
}
template<>
template <>
inline __device__ bf16_4_t mul(bf16_4_t a, bf16_4_t b) {
bf16_4_t c;
c.x = mul<__nv_bfloat162, __nv_bfloat162, __nv_bfloat162>(a.x, b.x);
......@@ -192,7 +194,7 @@ inline __device__ bf16_4_t mul(bf16_4_t a, bf16_4_t b) {
return c;
}
template<>
template <>
inline __device__ bf16_4_t mul(__nv_bfloat16 a, bf16_4_t b) {
__nv_bfloat162 s = bf162bf162(a);
bf16_4_t c;
......@@ -201,7 +203,7 @@ inline __device__ bf16_4_t mul(__nv_bfloat16 a, bf16_4_t b) {
return c;
}
template<>
template <>
inline __device__ bf16_8_t mul(bf16_8_t a, bf16_8_t b) {
bf16_8_t c;
c.x = mul<__nv_bfloat162, __nv_bfloat162, __nv_bfloat162>(a.x, b.x);
......@@ -211,7 +213,7 @@ inline __device__ bf16_8_t mul(bf16_8_t a, bf16_8_t b) {
return c;
}
template<>
template <>
inline __device__ bf16_8_t mul(__nv_bfloat16 a, bf16_8_t b) {
__nv_bfloat162 s = bf162bf162(a);
bf16_8_t c;
......@@ -222,26 +224,26 @@ inline __device__ bf16_8_t mul(__nv_bfloat16 a, bf16_8_t b) {
return c;
}
template<>
template <>
inline __device__ float mul(__nv_bfloat16 a, __nv_bfloat16 b) {
float fa = __bfloat162float(a);
float fb = __bfloat162float(b);
return fa * fb;
}
template<>
template <>
inline __device__ float2 mul(__nv_bfloat162 a, __nv_bfloat162 b) {
float2 fa = bf1622float2(a);
float2 fb = bf1622float2(b);
return mul<float2, float2, float2>(fa, fb);
}
template<>
template <>
inline __device__ float2 mul(__nv_bfloat16 a, __nv_bfloat162 b) {
return mul<float2, __nv_bfloat162, __nv_bfloat162>(bf162bf162(a), b);
}
template<>
template <>
inline __device__ Float4_ mul(bf16_4_t a, bf16_4_t b) {
Float4_ fc;
fc.x = mul<float2, __nv_bfloat162, __nv_bfloat162>(a.x, b.x);
......@@ -249,7 +251,7 @@ inline __device__ Float4_ mul(bf16_4_t a, bf16_4_t b) {
return fc;
}
template<>
template <>
inline __device__ Float4_ mul(__nv_bfloat16 a, bf16_4_t b) {
__nv_bfloat162 s = bf162bf162(a);
Float4_ fc;
......@@ -258,7 +260,7 @@ inline __device__ Float4_ mul(__nv_bfloat16 a, bf16_4_t b) {
return fc;
}
template<>
template <>
inline __device__ Float8_ mul(bf16_8_t a, bf16_8_t b) {
Float8_ fc;
fc.x = mul<float2, __nv_bfloat162, __nv_bfloat162>(a.x, b.x);
......@@ -268,7 +270,7 @@ inline __device__ Float8_ mul(bf16_8_t a, bf16_8_t b) {
return fc;
}
template<>
template <>
inline __device__ Float8_ mul(__nv_bfloat16 a, bf16_8_t b) {
__nv_bfloat162 s = bf162bf162(a);
Float8_ fc;
......@@ -280,7 +282,8 @@ inline __device__ Float8_ mul(__nv_bfloat16 a, bf16_8_t b) {
}
// Vector fused multiply-add.
inline __device__ __nv_bfloat162 fma(__nv_bfloat162 a, __nv_bfloat162 b, __nv_bfloat162 c) {
inline __device__ __nv_bfloat162 fma(__nv_bfloat162 a, __nv_bfloat162 b,
__nv_bfloat162 c) {
#if defined(__CUDA_ARCH__) && __CUDA_ARCH__ < 800
assert(false);
#else
......@@ -288,7 +291,8 @@ inline __device__ __nv_bfloat162 fma(__nv_bfloat162 a, __nv_bfloat162 b, __nv_bf
#endif
}
inline __device__ __nv_bfloat162 fma(__nv_bfloat16 a, __nv_bfloat162 b, __nv_bfloat162 c) {
inline __device__ __nv_bfloat162 fma(__nv_bfloat16 a, __nv_bfloat162 b,
__nv_bfloat162 c) {
#if defined(__CUDA_ARCH__) && __CUDA_ARCH__ < 800
assert(false);
#else
......@@ -379,23 +383,23 @@ inline __device__ Float8_ fma(__nv_bfloat16 a, bf16_8_t b, Float8_ fc) {
}
// Vector sum.
template<>
template <>
inline __device__ float sum(__nv_bfloat16 v) {
return __bfloat162float(v);
}
template<>
template <>
inline __device__ float sum(__nv_bfloat162 v) {
float2 vf = bf1622float2(v);
return vf.x + vf.y;
}
template<>
template <>
inline __device__ float sum(bf16_4_t v) {
return sum(v.x) + sum(v.y);
}
template<>
template <>
inline __device__ float sum(bf16_8_t v) {
return sum(v.x) + sum(v.y) + sum(v.z) + sum(v.w);
}
......@@ -448,4 +452,4 @@ inline __device__ void zero(__nv_bfloat16& dst) {
#endif
}
} // namespace vllm
} // namespace vllm
csrc/attention/dtype_float16.cuh
View file @ 5f6d10c1
/*
* Adapted from https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* and https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Adapted from
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* and
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Copyright (c) 2023, The vLLM team.
* Copyright (c) 2020-2023, NVIDIA CORPORATION. All rights reserved.
*
......@@ -30,37 +32,37 @@
namespace vllm {
// FP16 vector types for Q, K, V.
template<>
template <>
struct Vec<uint16_t, 1> {
using Type = uint16_t;
};
template<>
template <>
struct Vec<uint16_t, 2> {
using Type = uint32_t;
};
template<>
template <>
struct Vec<uint16_t, 4> {
using Type = uint2;
};
template<>
template <>
struct Vec<uint16_t, 8> {
using Type = uint4;
};
// FP32 accumulator vector types corresponding to Vec.
template<>
template <>
struct FloatVec<uint16_t> {
using Type = float;
};
template<>
template <>
struct FloatVec<uint32_t> {
using Type = float2;
};
template<>
template <>
struct FloatVec<uint2> {
using Type = Float4_;
};
template<>
template <>
struct FloatVec<uint4> {
using Type = Float8_;
};
......@@ -73,8 +75,8 @@ inline __device__ uint32_t h0_h0(uint16_t a) {
return b;
#else
union {
uint32_t u32;
uint16_t u16[2];
uint32_t u32;
uint16_t u16[2];
} tmp;
tmp.u16[0] = a;
tmp.u16[1] = a;
......@@ -130,10 +132,12 @@ inline __device__ uint32_t float2_to_half2(float2 f) {
} tmp;
#ifndef USE_ROCM
#if defined(__CUDA_ARCH__) && __CUDA_ARCH__ >= 800
asm volatile("cvt.rn.f16x2.f32 %0, %1, %2;\n" : "=r"(tmp.u32) : "f"(f.y), "f"(f.x));
asm volatile("cvt.rn.f16x2.f32 %0, %1, %2;\n"
: "=r"(tmp.u32)
: "f"(f.y), "f"(f.x));
#else
asm volatile("cvt.rn.f16.f32 %0, %1;\n" : "=h"(tmp.u16[0]) : "f"(f.x));
asm volatile("cvt.rn.f16.f32 %0, %1;\n" : "=h"(tmp.u16[1]) : "f"(f.y));
asm volatile("cvt.rn.f16.f32 %0, %1;\n" : "=h"(tmp.u16[0]) : "f"(f.x));
asm volatile("cvt.rn.f16.f32 %0, %1;\n" : "=h"(tmp.u16[1]) : "f"(f.y));
#endif
#else
tmp.u16[0] = float_to_half(f.x);
......@@ -201,7 +205,7 @@ inline __device__ Float8_ add(uint4 a, Float8_ fb) {
}
// Vector multiplication.
template<>
template <>
inline __device__ uint16_t mul(uint16_t a, uint16_t b) {
uint16_t c;
#ifndef USE_ROCM
......@@ -212,7 +216,7 @@ inline __device__ uint16_t mul(uint16_t a, uint16_t b) {
return c;
}
template<>
template <>
inline __device__ uint32_t mul(uint32_t a, uint32_t b) {
uint32_t c;
#ifndef USE_ROCM
......@@ -223,12 +227,12 @@ inline __device__ uint32_t mul(uint32_t a, uint32_t b) {
return c;
}
template<>
template <>
inline __device__ uint32_t mul(uint16_t a, uint32_t b) {
return mul<uint32_t, uint32_t, uint32_t>(h0_h0(a), b);
}
template<>
template <>
inline __device__ uint2 mul(uint2 a, uint2 b) {
uint2 c;
c.x = mul<uint32_t, uint32_t, uint32_t>(a.x, b.x);
......@@ -236,7 +240,7 @@ inline __device__ uint2 mul(uint2 a, uint2 b) {
return c;
}
template<>
template <>
inline __device__ uint2 mul(uint16_t a, uint2 b) {
uint32_t s = h0_h0(a);
uint2 c;
......@@ -245,7 +249,7 @@ inline __device__ uint2 mul(uint16_t a, uint2 b) {
return c;
}
template<>
template <>
inline __device__ uint4 mul(uint4 a, uint4 b) {
uint4 c;
c.x = mul<uint32_t, uint32_t, uint32_t>(a.x, b.x);
......@@ -255,7 +259,7 @@ inline __device__ uint4 mul(uint4 a, uint4 b) {
return c;
}
template<>
template <>
inline __device__ uint4 mul(uint16_t a, uint4 b) {
uint32_t s = h0_h0(a);
uint4 c;
......@@ -266,26 +270,26 @@ inline __device__ uint4 mul(uint16_t a, uint4 b) {
return c;
}
template<>
template <>
inline __device__ float mul(uint16_t a, uint16_t b) {
float fa = half_to_float(a);
float fb = half_to_float(b);
return fa * fb;
}
template<>
template <>
inline __device__ float2 mul(uint32_t a, uint32_t b) {
float2 fa = half2_to_float2(a);
float2 fb = half2_to_float2(b);
return mul<float2, float2, float2>(fa, fb);
}
template<>
template <>
inline __device__ float2 mul(uint16_t a, uint32_t b) {
return mul<float2, uint32_t, uint32_t>(h0_h0(a), b);
}
template<>
template <>
inline __device__ Float4_ mul(uint2 a, uint2 b) {
Float4_ fc;
fc.x = mul<float2, uint32_t, uint32_t>(a.x, b.x);
......@@ -293,7 +297,7 @@ inline __device__ Float4_ mul(uint2 a, uint2 b) {
return fc;
}
template<>
template <>
inline __device__ Float4_ mul(uint16_t a, uint2 b) {
uint32_t s = h0_h0(a);
Float4_ fc;
......@@ -302,7 +306,7 @@ inline __device__ Float4_ mul(uint16_t a, uint2 b) {
return fc;
}
template<>
template <>
inline __device__ Float8_ mul(uint4 a, uint4 b) {
Float8_ fc;
fc.x = mul<float2, uint32_t, uint32_t>(a.x, b.x);
......@@ -312,7 +316,7 @@ inline __device__ Float8_ mul(uint4 a, uint4 b) {
return fc;
}
template<>
template <>
inline __device__ Float8_ mul(uint16_t a, uint4 b) {
uint32_t s = h0_h0(a);
Float8_ fc;
......@@ -327,9 +331,13 @@ inline __device__ Float8_ mul(uint16_t a, uint4 b) {
inline __device__ uint32_t fma(uint32_t a, uint32_t b, uint32_t c) {
uint32_t d;
#ifndef USE_ROCM
asm volatile("fma.rn.f16x2 %0, %1, %2, %3;\n" : "=r"(d) : "r"(a), "r"(b), "r"(c));
asm volatile("fma.rn.f16x2 %0, %1, %2, %3;\n"
: "=r"(d)
: "r"(a), "r"(b), "r"(c));
#else
asm volatile("v_pk_fma_f16 %0, %1, %2, %3;\n" : "=v"(d) : "v"(a), "v"(b), "v"(c));
asm volatile("v_pk_fma_f16 %0, %1, %2, %3;\n"
: "=v"(d)
: "v"(a), "v"(b), "v"(c));
#endif
return d;
}
......@@ -423,24 +431,24 @@ inline __device__ Float8_ fma(uint16_t a, uint4 b, Float8_ fc) {
}
// Vector sum.
template<>
template <>
inline __device__ float sum(uint16_t v) {
return half_to_float(v);
}
template<>
template <>
inline __device__ float sum(uint32_t v) {
float2 tmp = half2_to_float2(v);
return tmp.x + tmp.y;
}
template<>
template <>
inline __device__ float sum(uint2 v) {
uint32_t c = add(v.x, v.y);
return sum(c);
}
template<>
template <>
inline __device__ float sum(uint4 v) {
uint32_t c = add(v.x, v.y);
c = add(c, v.z);
......@@ -470,13 +478,9 @@ inline __device__ void from_float(uint4& dst, Float8_ src) {
}
// From float16 to float32.
inline __device__ float to_float(uint16_t u) {
return half_to_float(u);
}
inline __device__ float to_float(uint16_t u) { return half_to_float(u); }
inline __device__ float2 to_float(uint32_t u) {
return half2_to_float2(u);
}
inline __device__ float2 to_float(uint32_t u) { return half2_to_float2(u); }
inline __device__ Float4_ to_float(uint2 u) {
Float4_ tmp;
......@@ -495,8 +499,6 @@ inline __device__ Float8_ to_float(uint4 u) {
}
// Zero-out a variable.
inline __device__ void zero(uint16_t& dst) {
dst = uint16_t(0);
}
inline __device__ void zero(uint16_t& dst) { dst = uint16_t(0); }
} // namespace vllm
} // namespace vllm
csrc/attention/dtype_float32.cuh
View file @ 5f6d10c1
/*
* Adapted from https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* and https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Adapted from
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention/decoder_masked_multihead_attention_template.hpp
* and
* https://github.com/NVIDIA/FasterTransformer/blob/release/v5.3_tag/src/fastertransformer/kernels/decoder_masked_multihead_attention_utils.h
* Copyright (c) 2023, The vLLM team.
* Copyright (c) 2020-2023, NVIDIA CORPORATION. All rights reserved.
*
......@@ -38,37 +40,35 @@ struct Float8_ {
};
// FP32 vector types for Q, K, V.
template<>
template <>
struct Vec<float, 1> {
using Type = float;
};
template<>
template <>
struct Vec<float, 2> {
using Type = float2;
};
template<>
template <>
struct Vec<float, 4> {
using Type = float4;
};
// FP32 accumulator vector types corresponding to Vec.
template<>
template <>
struct FloatVec<float> {
using Type = float;
};
template<>
template <>
struct FloatVec<float2> {
using Type = float2;
};
template<>
template <>
struct FloatVec<float4> {
using Type = float4;
};
// Vector addition.
inline __device__ float add(float a, float b) {
return a + b;
}
inline __device__ float add(float a, float b) { return a + b; }
inline __device__ float2 add(float2 a, float2 b) {
float2 c;
......@@ -87,12 +87,12 @@ inline __device__ float4 add(float4 a, float4 b) {
}
// Vector multiplication.
template<>
template <>
inline __device__ float mul<float, float>(float a, float b) {
return a * b;
}
template<>
template <>
inline __device__ float2 mul(float2 a, float2 b) {
float2 c;
c.x = a.x * b.x;
......@@ -100,7 +100,7 @@ inline __device__ float2 mul(float2 a, float2 b) {
return c;
}
template<>
template <>
inline __device__ float2 mul(float a, float2 b) {
float2 c;
c.x = a * b.x;
......@@ -108,7 +108,7 @@ inline __device__ float2 mul(float a, float2 b) {
return c;
}
template<>
template <>
inline __device__ float4 mul(float4 a, float4 b) {
float4 c;
c.x = a.x * b.x;
......@@ -118,7 +118,7 @@ inline __device__ float4 mul(float4 a, float4 b) {
return c;
}
template<>
template <>
inline __device__ float4 mul(float a, float4 b) {
float4 c;
c.x = a * b.x;
......@@ -129,9 +129,7 @@ inline __device__ float4 mul(float a, float4 b) {
}
// Vector fused multiply-add.
inline __device__ float fma(float a, float b, float c) {
return a * b + c;
}
inline __device__ float fma(float a, float b, float c) { return a * b + c; }
inline __device__ float2 fma(float2 a, float2 b, float2 c) {
float2 d;
......@@ -182,35 +180,33 @@ inline __device__ Float8_ fma(float a, Float8_ b, Float8_ c) {
}
// Vector sum.
template<>
template <>
inline __device__ float sum(float v) {
return v;
}
template<>
template <>
inline __device__ float sum(float2 v) {
return v.x + v.y;
}
template<>
template <>
inline __device__ float sum(float4 v) {
return v.x + v.y + v.z + v.w;
}
template<>
template <>
inline __device__ float sum(Float4_ v) {
return v.x.x + v.x.y + v.y.x + v.y.y;
}
template<>
template <>
inline __device__ float sum(Float8_ v) {
return v.x.x + v.x.y + v.y.x + v.y.y + v.z.x + v.z.y + v.w.x + v.w.y;
}
// Vector dot product.
inline __device__ float dot(float a, float b) {
return a * b;
}
inline __device__ float dot(float a, float b) { return a * b; }
inline __device__ float dot(float2 a, float2 b) {
float2 c = mul<float2, float2, float2>(a, b);
......@@ -232,42 +228,24 @@ inline __device__ float dot(Float8_ a, Float8_ b) {
}
// From float to float.
inline __device__ void from_float(float& dst, float src) {
dst = src;
}
inline __device__ void from_float(float& dst, float src) { dst = src; }
inline __device__ void from_float(float2& dst, float2 src) {
dst = src;
}
inline __device__ void from_float(float2& dst, float2 src) { dst = src; }
inline __device__ void from_float(float4& dst, float4 src) {
dst = src;
}
inline __device__ void from_float(float4& dst, float4 src) { dst = src; }
// From float to float.
inline __device__ float to_float(float u) {
return u;
}
inline __device__ float to_float(float u) { return u; }
inline __device__ float2 to_float(float2 u) {
return u;
}
inline __device__ float2 to_float(float2 u) { return u; }
inline __device__ float4 to_float(float4 u) {
return u;
}
inline __device__ float4 to_float(float4 u) { return u; }
inline __device__ Float4_ to_float(Float4_ u) {
return u;
}
inline __device__ Float4_ to_float(Float4_ u) { return u; }
inline __device__ Float8_ to_float(Float8_ u) {
return u;
}
inline __device__ Float8_ to_float(Float8_ u) { return u; }
// Zero-out a variable.
inline __device__ void zero(float& dst) {
dst = 0.f;
}
inline __device__ void zero(float& dst) { dst = 0.f; }
} // namespace vllm
} // namespace vllm
csrc/attention/dtype_fp8.cuh
View file @ 5f6d10c1
......@@ -4,38 +4,38 @@
#include <stdint.h>
#ifdef ENABLE_FP8
#ifndef USE_ROCM
#include <cuda_fp8.h>
#endif // USE_ROCM
#endif // ENABLE_FP8
#ifndef USE_ROCM
#include <cuda_fp8.h>
#endif // USE_ROCM
#endif // ENABLE_FP8
namespace vllm {
enum class Fp8KVCacheDataType {
kAuto = 0,
kFp8E4M3 = 1,
kFp8E5M2 = 2,
kAuto = 0,
kFp8E4M3 = 1,
kFp8E5M2 = 2,
};
// fp8 vector types for quantization of kv cache
template<>
template <>
struct Vec<uint8_t, 1> {
using Type = uint8_t;
using Type = uint8_t;
};
template<>
template <>
struct Vec<uint8_t, 2> {
using Type = uint16_t;
using Type = uint16_t;
};
template<>
template <>
struct Vec<uint8_t, 4> {
using Type = uint32_t;
using Type = uint32_t;
};
template<>
template <>
struct Vec<uint8_t, 8> {
using Type = uint2;
using Type = uint2;
};
} // namespace vllm
} // namespace vllm
csrc/cache.h
View file @ 5f6d10c1
......@@ -5,36 +5,24 @@
#include <map>
#include <vector>
void swap_blocks(
torch::Tensor& src,
torch::Tensor& dst,
const torch::Tensor& block_mapping);
void swap_blocks(torch::Tensor& src, torch::Tensor& dst,
const torch::Tensor& block_mapping);
void copy_blocks(
std::vector<torch::Tensor>& key_caches,
std::vector<torch::Tensor>& value_caches,
const torch::Tensor& block_mapping);
void copy_blocks(std::vector<torch::Tensor>& key_caches,
std::vector<torch::Tensor>& value_caches,
const torch::Tensor& block_mapping);
void reshape_and_cache(
torch::Tensor& key,
torch::Tensor& value,
torch::Tensor& key_cache,
torch::Tensor& value_cache,
torch::Tensor& slot_mapping,
const std::string& kv_cache_dtype,
const float kv_scale);
void reshape_and_cache(torch::Tensor& key, torch::Tensor& value,
torch::Tensor& key_cache, torch::Tensor& value_cache,
torch::Tensor& slot_mapping,
const std::string& kv_cache_dtype, const float kv_scale);
void reshape_and_cache_flash(
torch::Tensor& key,
torch::Tensor& value,
torch::Tensor& key_cache,
torch::Tensor& value_cache,
torch::Tensor& slot_mapping,
const std::string& kv_cache_dtype);
void reshape_and_cache_flash(torch::Tensor& key, torch::Tensor& value,
torch::Tensor& key_cache,
torch::Tensor& value_cache,
torch::Tensor& slot_mapping,
const std::string& kv_cache_dtype);
// Just for unittest
void convert_fp8(
torch::Tensor& dst_cache,
torch::Tensor& src_cache,
const float scale,
const std::string& kv_cache_dtype);
void convert_fp8(torch::Tensor& dst_cache, torch::Tensor& src_cache,
const float scale, const std::string& kv_cache_dtype);
csrc/cache_kernels.cu
View file @ 5f6d10c1
......@@ -6,9 +6,9 @@
#include "dispatch_utils.h"
#ifdef USE_ROCM
#include "quantization/fp8/amd/quant_utils.cuh"
#include "quantization/fp8/amd/quant_utils.cuh"
#else
#include "quantization/fp8/nvidia/quant_utils.cuh"
#include "quantization/fp8/nvidia/quant_utils.cuh"
#endif
#include <algorithm>
......@@ -18,20 +18,17 @@
#ifdef USE_ROCM
#include <hip/hip_bf16.h>
typedef __hip_bfloat16 __nv_bfloat16;
typedef __hip_bfloat16 __nv_bfloat16;
#endif
void swap_blocks(
torch::Tensor& src,
torch::Tensor& dst,
const torch::Tensor& block_mapping) {
void swap_blocks(torch::Tensor& src, torch::Tensor& dst,
const torch::Tensor& block_mapping) {
torch::Device src_device = src.device();
torch::Device dst_device = dst.device();
cudaMemcpyKind memcpy_type;
if (src_device.is_cuda() && dst_device.is_cuda()) {
TORCH_CHECK(
src_device.index() == dst_device.index(),
"src and dst must be on the same GPU");
TORCH_CHECK(src_device.index() == dst_device.index(),
"src and dst must be on the same GPU");
memcpy_type = cudaMemcpyDeviceToDevice;
} else if (src_device.is_cuda() && dst_device.is_cpu()) {
memcpy_type = cudaMemcpyDeviceToHost;
......@@ -41,16 +38,17 @@ void swap_blocks(
TORCH_CHECK(false, "Invalid device combination");
}
// NOTE(youkaichao): keep in mind that `block_mapping` should be
// NOTE(youkaichao): keep in mind that `block_mapping` should be
// a cpu tensor, otherwise every `item` call will require a gpu-cpu
// synchronization.
TORCH_CHECK(block_mapping.device().is_cpu(), "block_mapping must be on CPU");
char *src_ptr = static_cast<char*>(src.data_ptr());
char *dst_ptr = static_cast<char*>(dst.data_ptr());
char* src_ptr = static_cast<char*>(src.data_ptr());
char* dst_ptr = static_cast<char*>(dst.data_ptr());
const int64_t block_size_in_bytes = src.element_size() * src[0].numel();
const at::cuda::OptionalCUDAGuard device_guard(src_device.is_cuda() ? src_device : dst_device);
const at::cuda::OptionalCUDAGuard device_guard(
src_device.is_cuda() ? src_device : dst_device);
const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
// NOTE(woosuk): This can be slow if the number of blocks is large.
const int64_t num_blocks = block_mapping.size(0);
......@@ -59,29 +57,25 @@ void swap_blocks(
int64_t dst_block_number = block_mapping[i][1].item<int64_t>();
int64_t src_offset = src_block_number * block_size_in_bytes;
int64_t dst_offset = dst_block_number * block_size_in_bytes;
cudaMemcpyAsync(
dst_ptr + dst_offset,
src_ptr + src_offset,
block_size_in_bytes,
memcpy_type,
stream);
cudaMemcpyAsync(dst_ptr + dst_offset, src_ptr + src_offset,
block_size_in_bytes, memcpy_type, stream);
}
}
namespace vllm {
// Grid: (num_layers, num_pairs)
template<typename scalar_t>
__global__ void copy_blocks_kernel(
int64_t* key_cache_ptrs,
int64_t* value_cache_ptrs,
const int64_t* __restrict__ block_mapping,
const int numel_per_block) {
template <typename scalar_t>
__global__ void copy_blocks_kernel(int64_t* key_cache_ptrs,
int64_t* value_cache_ptrs,
const int64_t* __restrict__ block_mapping,
const int numel_per_block) {
const int layer_idx = blockIdx.x;
const int pair_idx = blockIdx.y;
scalar_t* key_cache = reinterpret_cast<scalar_t*>(key_cache_ptrs[layer_idx]);
scalar_t* value_cache = reinterpret_cast<scalar_t*>(value_cache_ptrs[layer_idx]);
scalar_t* value_cache =
reinterpret_cast<scalar_t*>(value_cache_ptrs[layer_idx]);
int64_t src_block_number = block_mapping[2 * pair_idx];
int64_t dst_block_number = block_mapping[2 * pair_idx + 1];
......@@ -99,12 +93,11 @@ __global__ void copy_blocks_kernel(
}
}
} // namespace vllm
} // namespace vllm
void copy_blocks(
std::vector<torch::Tensor>& key_caches,
std::vector<torch::Tensor>& value_caches,
const torch::Tensor& block_mapping) {
void copy_blocks(std::vector<torch::Tensor>& key_caches,
std::vector<torch::Tensor>& value_caches,
const torch::Tensor& block_mapping) {
int num_layers = key_caches.size();
TORCH_CHECK(num_layers == value_caches.size());
if (num_layers == 0) {
......@@ -118,8 +111,10 @@ void copy_blocks(
int64_t key_cache_ptrs[num_layers];
int64_t value_cache_ptrs[num_layers];
for (int layer_idx = 0; layer_idx < num_layers; ++layer_idx) {
key_cache_ptrs[layer_idx] = reinterpret_cast<int64_t>(key_caches[layer_idx].data_ptr());
value_cache_ptrs[layer_idx] = reinterpret_cast<int64_t>(value_caches[layer_idx].data_ptr());
key_cache_ptrs[layer_idx] =
reinterpret_cast<int64_t>(key_caches[layer_idx].data_ptr());
value_cache_ptrs[layer_idx] =
reinterpret_cast<int64_t>(value_caches[layer_idx].data_ptr());
}
// block_mapping is a 2D tensor with shape (num_pairs, 2).
......@@ -127,10 +122,12 @@ void copy_blocks(
// Move the data structures to the GPU.
// NOTE: This synchronizes the CPU and GPU.
torch::Tensor key_cache_ptrs_tensor = torch::from_blob(
key_cache_ptrs, {num_layers}, torch::kInt64).to(cache_device);
torch::Tensor value_cache_ptrs_tensor = torch::from_blob(
value_cache_ptrs, {num_layers}, torch::kInt64).to(cache_device);
torch::Tensor key_cache_ptrs_tensor =
torch::from_blob(key_cache_ptrs, {num_layers}, torch::kInt64)
.to(cache_device);
torch::Tensor value_cache_ptrs_tensor =
torch::from_blob(value_cache_ptrs, {num_layers}, torch::kInt64)
.to(cache_device);
// Launch the kernel.
const int numel_per_block = key_caches[0][0].numel();
......@@ -139,31 +136,28 @@ void copy_blocks(
const at::cuda::OptionalCUDAGuard device_guard(cache_device);
const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
VLLM_DISPATCH_FLOATING_AND_BYTE_TYPES(
key_caches[0].scalar_type(), "copy_blocks_kernel", ([&] {
vllm::copy_blocks_kernel<scalar_t><<<grid, block, 0, stream>>>(
key_cache_ptrs_tensor.data_ptr<int64_t>(),
value_cache_ptrs_tensor.data_ptr<int64_t>(),
block_mapping.data_ptr<int64_t>(),
numel_per_block);
}));
key_caches[0].scalar_type(), "copy_blocks_kernel", ([&] {
vllm::copy_blocks_kernel<scalar_t><<<grid, block, 0, stream>>>(
key_cache_ptrs_tensor.data_ptr<int64_t>(),
value_cache_ptrs_tensor.data_ptr<int64_t>(),
block_mapping.data_ptr<int64_t>(), numel_per_block);
}));
}
namespace vllm {
template<typename scalar_t, typename cache_t, Fp8KVCacheDataType kv_dt>
template <typename scalar_t, typename cache_t, Fp8KVCacheDataType kv_dt>
__global__ void reshape_and_cache_kernel(
const scalar_t* __restrict__ key, // [num_tokens, num_heads, head_size]
const scalar_t* __restrict__ value, // [num_tokens, num_heads, head_size]
cache_t* __restrict__ key_cache, // [num_blocks, num_heads, head_size/x, block_size, x]
cache_t* __restrict__ value_cache, // [num_blocks, num_heads, head_size, block_size]
const int64_t* __restrict__ slot_mapping, // [num_tokens]
const int key_stride,
const int value_stride,
const int num_heads,
const int head_size,
const int block_size,
const int x,
const float kv_scale) {
const scalar_t* __restrict__ key, // [num_tokens, num_heads, head_size]
const scalar_t* __restrict__ value, // [num_tokens, num_heads, head_size]
cache_t* __restrict__ key_cache, // [num_blocks, num_heads, head_size/x,
// block_size, x]
cache_t* __restrict__ value_cache, // [num_blocks, num_heads, head_size,
// block_size]
const int64_t* __restrict__ slot_mapping, // [num_tokens]
const int key_stride, const int value_stride, const int num_heads,
const int head_size, const int block_size, const int x,
const float kv_scale) {
const int64_t token_idx = blockIdx.x;
const int64_t slot_idx = slot_mapping[token_idx];
if (slot_idx < 0) {
......@@ -184,40 +178,39 @@ __global__ void reshape_and_cache_kernel(
const int x_idx = head_offset / x;
const int x_offset = head_offset % x;
const int64_t tgt_key_idx = block_idx * num_heads * (head_size / x) * block_size * x
+ head_idx * (head_size / x) * block_size * x
+ x_idx * block_size * x
+ block_offset * x
+ x_offset;
const int64_t tgt_value_idx = block_idx * num_heads * head_size * block_size
+ head_idx * head_size * block_size
+ head_offset * block_size
+ block_offset;
const int64_t tgt_key_idx =
block_idx * num_heads * (head_size / x) * block_size * x +
head_idx * (head_size / x) * block_size * x + x_idx * block_size * x +
block_offset * x + x_offset;
const int64_t tgt_value_idx =
block_idx * num_heads * head_size * block_size +
head_idx * head_size * block_size + head_offset * block_size +
block_offset;
scalar_t tgt_key = key[src_key_idx];
scalar_t tgt_value = value[src_value_idx];
if constexpr (kv_dt == Fp8KVCacheDataType::kAuto) {
key_cache[tgt_key_idx] = tgt_key;
value_cache[tgt_value_idx] = tgt_value;
} else {
key_cache[tgt_key_idx] = fp8::scaled_convert<cache_t, scalar_t, kv_dt>(tgt_key, kv_scale);
value_cache[tgt_value_idx] = fp8::scaled_convert<cache_t, scalar_t, kv_dt>(tgt_value, kv_scale);
key_cache[tgt_key_idx] =
fp8::scaled_convert<cache_t, scalar_t, kv_dt>(tgt_key, kv_scale);
value_cache[tgt_value_idx] =
fp8::scaled_convert<cache_t, scalar_t, kv_dt>(tgt_value, kv_scale);
}
}
}
template<typename scalar_t>
template <typename scalar_t>
__global__ void reshape_and_cache_flash_kernel(
const scalar_t* __restrict__ key, // [num_tokens, num_heads, head_size]
const scalar_t* __restrict__ value, // [num_tokens, num_heads, head_size]
scalar_t* __restrict__ k_cache, // [num_blocks, block_size, num_heads, head_size]
scalar_t* __restrict__ v_cache, // [num_blocks, block_size, num_heads, head_size]
const int64_t* __restrict__ slot_mapping, // [num_tokens]
const int block_stride,
const int key_stride,
const int value_stride,
const int num_heads,
const int head_size,
const int block_size) {
const scalar_t* __restrict__ key, // [num_tokens, num_heads, head_size]
const scalar_t* __restrict__ value, // [num_tokens, num_heads, head_size]
scalar_t* __restrict__ k_cache, // [num_blocks, block_size, num_heads,
// head_size]
scalar_t* __restrict__ v_cache, // [num_blocks, block_size, num_heads,
// head_size]
const int64_t* __restrict__ slot_mapping, // [num_tokens]
const int block_stride, const int key_stride, const int value_stride,
const int num_heads, const int head_size, const int block_size) {
const int64_t token_idx = blockIdx.x;
const int64_t slot_idx = slot_mapping[token_idx];
// NOTE: slot_idx can be -1 if the token is padded
......@@ -232,43 +225,37 @@ __global__ void reshape_and_cache_flash_kernel(
const int64_t src_value_idx = token_idx * value_stride + i;
const int head_idx = i / head_size;
const int head_offset = i % head_size;
const int64_t tgt_value_idx = block_idx * block_stride
+ block_offset * num_heads * head_size
+ head_idx * head_size
+ head_offset;
const int64_t tgt_value_idx = block_idx * block_stride +
block_offset * num_heads * head_size +
head_idx * head_size + head_offset;
k_cache[tgt_value_idx] = key[src_key_idx];
v_cache[tgt_value_idx] = value[src_value_idx];
}
}
} // namespace vllm
} // namespace vllm
// KV_T is the stored data type of kv-cache.
// CACHE_T is the data type of key and value tensors.
// KV_DTYPE is the real data type of kv-cache.
#define CALL_RESHAPE_AND_CACHE(KV_T, CACHE_T, KV_DTYPE) \
vllm::reshape_and_cache_kernel<KV_T, CACHE_T, KV_DTYPE><<<grid, block, 0, stream>>>( \
reinterpret_cast<KV_T*>(key.data_ptr()), \
reinterpret_cast<KV_T*>(value.data_ptr()), \
reinterpret_cast<CACHE_T*>(key_cache.data_ptr()), \
reinterpret_cast<CACHE_T*>(value_cache.data_ptr()), \
slot_mapping.data_ptr<int64_t>(), \
key_stride, \
value_stride, \
num_heads, \
head_size, \
block_size, \
x, \
kv_scale);
#define CALL_RESHAPE_AND_CACHE(KV_T, CACHE_T, KV_DTYPE) \
vllm::reshape_and_cache_kernel<KV_T, CACHE_T, KV_DTYPE> \
<<<grid, block, 0, stream>>>( \
reinterpret_cast<KV_T*>(key.data_ptr()), \
reinterpret_cast<KV_T*>(value.data_ptr()), \
reinterpret_cast<CACHE_T*>(key_cache.data_ptr()), \
reinterpret_cast<CACHE_T*>(value_cache.data_ptr()), \
slot_mapping.data_ptr<int64_t>(), key_stride, value_stride, \
num_heads, head_size, block_size, x, kv_scale);
void reshape_and_cache(
torch::Tensor& key, // [num_tokens, num_heads, head_size]
torch::Tensor& value, // [num_tokens, num_heads, head_size]
torch::Tensor& key_cache, // [num_blocks, num_heads, head_size/x, block_size, x]
torch::Tensor& value_cache, // [num_blocks, num_heads, head_size, block_size]
torch::Tensor& slot_mapping, // [num_tokens]
const std::string& kv_cache_dtype,
const float kv_scale)
{
torch::Tensor& key, // [num_tokens, num_heads, head_size]
torch::Tensor& value, // [num_tokens, num_heads, head_size]
torch::Tensor&
key_cache, // [num_blocks, num_heads, head_size/x, block_size, x]
torch::Tensor&
value_cache, // [num_blocks, num_heads, head_size, block_size]
torch::Tensor& slot_mapping, // [num_tokens]
const std::string& kv_cache_dtype, const float kv_scale) {
int num_tokens = key.size(0);
int num_heads = key.size(1);
int head_size = key.size(2);
......@@ -283,17 +270,17 @@ void reshape_and_cache(
const at::cuda::OptionalCUDAGuard device_guard(device_of(key));
const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
DISPATCH_BY_KV_CACHE_DTYPE(key.dtype(), kv_cache_dtype, CALL_RESHAPE_AND_CACHE)
DISPATCH_BY_KV_CACHE_DTYPE(key.dtype(), kv_cache_dtype,
CALL_RESHAPE_AND_CACHE)
}
void reshape_and_cache_flash(
torch::Tensor& key, // [num_tokens, num_heads, head_size]
torch::Tensor& value, // [num_tokens, num_heads, head_size]
torch::Tensor& k_cache, // [num_blocks, block_size, num_heads, head_size]
torch::Tensor& v_cache, // [num_blocks, block_size, num_heads, head_size]
torch::Tensor& slot_mapping, // [num_tokens]
const std::string& kv_cache_dtype)
{
torch::Tensor& key, // [num_tokens, num_heads, head_size]
torch::Tensor& value, // [num_tokens, num_heads, head_size]
torch::Tensor& k_cache, // [num_blocks, block_size, num_heads, head_size]
torch::Tensor& v_cache, // [num_blocks, block_size, num_heads, head_size]
torch::Tensor& slot_mapping, // [num_tokens]
const std::string& kv_cache_dtype) {
// FIXME: only support auto datatype, does not support fp8
if (kv_cache_dtype != "auto") {
TORCH_CHECK(false, "Unsupported data type of kv cache: ", kv_cache_dtype);
......@@ -313,62 +300,47 @@ void reshape_and_cache_flash(
const at::cuda::OptionalCUDAGuard device_guard(device_of(key));
const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
VLLM_DISPATCH_FLOATING_TYPES(
key.scalar_type(),
"reshape_and_cache_flash",
[&] {
vllm::reshape_and_cache_flash_kernel<scalar_t><<<grid, block, 0, stream>>>(
key.data_ptr<scalar_t>(),
value.data_ptr<scalar_t>(),
k_cache.data_ptr<scalar_t>(),
v_cache.data_ptr<scalar_t>(),
slot_mapping.data_ptr<int64_t>(),
block_stride,
key_stride,
value_stride,
num_heads,
head_size,
block_size);
});
key.scalar_type(), "reshape_and_cache_flash", [&] {
vllm::reshape_and_cache_flash_kernel<scalar_t>
<<<grid, block, 0, stream>>>(
key.data_ptr<scalar_t>(), value.data_ptr<scalar_t>(),
k_cache.data_ptr<scalar_t>(), v_cache.data_ptr<scalar_t>(),
slot_mapping.data_ptr<int64_t>(), block_stride, key_stride,
value_stride, num_heads, head_size, block_size);
});
}
namespace vllm {
template<typename Tout, typename Tin, Fp8KVCacheDataType kv_dt>
__global__ void convert_fp8_kernel(
const Tin* __restrict__ src_cache,
Tout* __restrict__ dst_cache,
const float kv_scale,
const int64_t block_stride) {
template <typename Tout, typename Tin, Fp8KVCacheDataType kv_dt>
__global__ void convert_fp8_kernel(const Tin* __restrict__ src_cache,
Tout* __restrict__ dst_cache,
const float kv_scale,
const int64_t block_stride) {
const int64_t block_idx = blockIdx.x;
for (int i = threadIdx.x; i < block_stride; i += blockDim.x) {
int64_t idx = block_idx * block_stride + i;
dst_cache[idx] = fp8::scaled_convert<Tout, Tin, kv_dt>(src_cache[idx], kv_scale);
dst_cache[idx] =
fp8::scaled_convert<Tout, Tin, kv_dt>(src_cache[idx], kv_scale);
}
}
} // namespace vllm
} // namespace vllm
#define CALL_CONVERT_FP8(Tout, Tin, KV_DTYPE) \
vllm::convert_fp8_kernel<Tout, Tin, KV_DTYPE><<<grid, block, 0, stream>>>( \
reinterpret_cast<Tin*>(src_cache.data_ptr()), \
reinterpret_cast<Tout*>(dst_cache.data_ptr()), \
kv_scale, \
block_stride);
#define CALL_CONVERT_FP8(Tout, Tin, KV_DTYPE) \
vllm::convert_fp8_kernel<Tout, Tin, KV_DTYPE><<<grid, block, 0, stream>>>( \
reinterpret_cast<Tin*>(src_cache.data_ptr()), \
reinterpret_cast<Tout*>(dst_cache.data_ptr()), kv_scale, block_stride);
// Only for testing.
void convert_fp8(
torch::Tensor& dst_cache,
torch::Tensor& src_cache,
const float kv_scale,
const std::string& kv_cache_dtype)
{
void convert_fp8(torch::Tensor& dst_cache, torch::Tensor& src_cache,
const float kv_scale, const std::string& kv_cache_dtype) {
torch::Device src_device = src_cache.device();
torch::Device dst_device = dst_cache.device();
TORCH_CHECK(src_device.is_cuda(), "src must be on a GPU")
TORCH_CHECK(dst_device.is_cuda(), "dst must be on a GPU")
TORCH_CHECK(
src_device.index() == dst_device.index(),
"src and dst must be on the same GPU");
TORCH_CHECK(src_device.index() == dst_device.index(),
"src and dst must be on the same GPU");
at::cuda::OptionalCUDAGuard device_guard(src_device);
int64_t num_blocks = src_cache.size(0);
......@@ -398,13 +370,15 @@ void convert_fp8(
} else if (src_cache.dtype() == at::ScalarType::Half) {
CALL_CONVERT_FP8(uint8_t, uint16_t, vllm::Fp8KVCacheDataType::kFp8E4M3);
} else if (src_cache.dtype() == at::ScalarType::BFloat16) {
CALL_CONVERT_FP8(uint8_t, __nv_bfloat16, vllm::Fp8KVCacheDataType::kFp8E4M3);
CALL_CONVERT_FP8(uint8_t, __nv_bfloat16,
vllm::Fp8KVCacheDataType::kFp8E4M3);
} else if (dst_cache.dtype() == at::ScalarType::Float) {
CALL_CONVERT_FP8(float, uint8_t, vllm::Fp8KVCacheDataType::kFp8E4M3);
} else if (dst_cache.dtype() == at::ScalarType::Half) {
CALL_CONVERT_FP8(uint16_t, uint8_t, vllm::Fp8KVCacheDataType::kFp8E4M3);
} else if (dst_cache.dtype() == at::ScalarType::BFloat16) {
CALL_CONVERT_FP8(__nv_bfloat16, uint8_t, vllm::Fp8KVCacheDataType::kFp8E4M3);
CALL_CONVERT_FP8(__nv_bfloat16, uint8_t,
vllm::Fp8KVCacheDataType::kFp8E4M3);
}
} else {
TORCH_CHECK(false, "Unsupported data type: ", kv_cache_dtype);
......
csrc/cpu/activation.cpp
View file @ 5f6d10c1
#include "cpu_types.hpp"
namespace {
template <typename scalar_t, vec_op::FP32Vec8 (*func)(const vec_op::FP32Vec8 &),
template <typename scalar_t, vec_op::FP32Vec8 (*func)(const vec_op::FP32Vec8&),
bool is_gated>
void activation_kernel(int num_tokens, int d, scalar_t *__restrict__ input,
scalar_t *__restrict__ output) {
void activation_kernel(int num_tokens, int d, scalar_t* __restrict__ input,
scalar_t* __restrict__ output) {
using scalar_vec_t = vec_op::vec_t<scalar_t>;
constexpr int VEC_ELEM_NUM = scalar_vec_t::get_elem_num();
......@@ -34,13 +34,13 @@ void activation_kernel(int num_tokens, int d, scalar_t *__restrict__ input,
}
}
FORCE_INLINE vec_op::FP32Vec8 silu_act(const vec_op::FP32Vec8 &x) {
FORCE_INLINE vec_op::FP32Vec8 silu_act(const vec_op::FP32Vec8& x) {
const vec_op::FP32Vec8 zeros(0.0);
const vec_op::FP32Vec8 ones(1.0);
return x / (ones + (zeros - x).exp());
}
FORCE_INLINE vec_op::FP32Vec8 gelu_new_act(const vec_op::FP32Vec8 &x) {
FORCE_INLINE vec_op::FP32Vec8 gelu_new_act(const vec_op::FP32Vec8& x) {
const vec_op::FP32Vec8 ones(1.0);
const vec_op::FP32Vec8 w1(0.79788456f);
const vec_op::FP32Vec8 w2(0.044715f);
......@@ -50,7 +50,7 @@ FORCE_INLINE vec_op::FP32Vec8 gelu_new_act(const vec_op::FP32Vec8 &x) {
return w3 * x * (ones + t);
}
FORCE_INLINE vec_op::FP32Vec8 gelu_fast_act(const vec_op::FP32Vec8 &x) {
FORCE_INLINE vec_op::FP32Vec8 gelu_fast_act(const vec_op::FP32Vec8& x) {
const vec_op::FP32Vec8 ones(1.0);
const vec_op::FP32Vec8 w1(0.79788456f);
const vec_op::FP32Vec8 w2(0.044715f);
......@@ -59,14 +59,14 @@ FORCE_INLINE vec_op::FP32Vec8 gelu_fast_act(const vec_op::FP32Vec8 &x) {
return w3 * x * (ones + t);
}
FORCE_INLINE vec_op::FP32Vec8 gelu_act(const vec_op::FP32Vec8 &x) {
FORCE_INLINE vec_op::FP32Vec8 gelu_act(const vec_op::FP32Vec8& x) {
const vec_op::FP32Vec8 ones(1.0);
const vec_op::FP32Vec8 w1(M_SQRT1_2);
const vec_op::FP32Vec8 w2(0.5);
return x * w2 * (ones + (x * w1).er());
}
FORCE_INLINE vec_op::FP32Vec8 gelu_tanh_act(const vec_op::FP32Vec8 &x) {
FORCE_INLINE vec_op::FP32Vec8 gelu_tanh_act(const vec_op::FP32Vec8& x) {
const vec_op::FP32Vec8 ones(1.0);
const vec_op::FP32Vec8 w1(M_SQRT2 * M_2_SQRTPI * 0.5);
const vec_op::FP32Vec8 w2(0.5);
......@@ -75,40 +75,36 @@ FORCE_INLINE vec_op::FP32Vec8 gelu_tanh_act(const vec_op::FP32Vec8 &x) {
const vec_op::FP32Vec8 inner = w1 * (x + x_3 * w3);
return x * w2 * (ones + inner.tanh());
}
}; // namespace
}; // namespace
void silu_and_mul(torch::Tensor &out, torch::Tensor &input) {
void silu_and_mul(torch::Tensor& out, torch::Tensor& input) {
int num_tokens = input.numel() / input.size(-1);
int d = input.size(-1) / 2;
VLLM_DISPATCH_FLOATING_TYPES(
input.scalar_type(), "silu_and_mul_impl", [&] {
CPU_KERNEL_GUARD_IN(silu_and_mul_impl)
activation_kernel<scalar_t, silu_act, true>(num_tokens, d,
input.data_ptr<scalar_t>(),
out.data_ptr<scalar_t>());
CPU_KERNEL_GUARD_OUT(silu_and_mul_impl)
});
VLLM_DISPATCH_FLOATING_TYPES(input.scalar_type(), "silu_and_mul_impl", [&] {
CPU_KERNEL_GUARD_IN(silu_and_mul_impl)
activation_kernel<scalar_t, silu_act, true>(
num_tokens, d, input.data_ptr<scalar_t>(), out.data_ptr<scalar_t>());
CPU_KERNEL_GUARD_OUT(silu_and_mul_impl)
});
}
void gelu_and_mul(torch::Tensor &out, // [..., d]
torch::Tensor &input) // [..., 2 * d]
void gelu_and_mul(torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
{
int num_tokens = input.numel() / input.size(-1);
int d = input.size(-1) / 2;
VLLM_DISPATCH_FLOATING_TYPES(
input.scalar_type(), "gelu_and_mul_impl", [&] {
CPU_KERNEL_GUARD_IN(gelu_and_mul_impl)
activation_kernel<scalar_t, gelu_act, true>(num_tokens, d,
input.data_ptr<scalar_t>(),
out.data_ptr<scalar_t>());
CPU_KERNEL_GUARD_OUT(gelu_and_mul_impl)
});
VLLM_DISPATCH_FLOATING_TYPES(input.scalar_type(), "gelu_and_mul_impl", [&] {
CPU_KERNEL_GUARD_IN(gelu_and_mul_impl)
activation_kernel<scalar_t, gelu_act, true>(
num_tokens, d, input.data_ptr<scalar_t>(), out.data_ptr<scalar_t>());
CPU_KERNEL_GUARD_OUT(gelu_and_mul_impl)
});
}
void gelu_tanh_and_mul(torch::Tensor &out, // [..., d]
torch::Tensor &input) // [..., 2 * d]
void gelu_tanh_and_mul(torch::Tensor& out, // [..., d]
torch::Tensor& input) // [..., 2 * d]
{
int num_tokens = input.numel() / input.size(-1);
int d = input.size(-1) / 2;
......@@ -123,7 +119,7 @@ void gelu_tanh_and_mul(torch::Tensor &out, // [..., d]
});
}
void gelu_new(torch::Tensor &out, torch::Tensor &input) {
void gelu_new(torch::Tensor& out, torch::Tensor& input) {
int num_tokens = input.numel() / input.size(-1);
int d = input.size(-1);
......@@ -135,7 +131,7 @@ void gelu_new(torch::Tensor &out, torch::Tensor &input) {
});
}
void gelu_fast(torch::Tensor &out, torch::Tensor &input) {
void gelu_fast(torch::Tensor& out, torch::Tensor& input) {
int num_tokens = input.numel() / input.size(-1);
int d = input.size(-1);
......
csrc/cpu/attention.cpp
View file @ 5f6d10c1
......@@ -2,7 +2,8 @@
namespace {
template <typename scalar_t> struct KernelVecType {
template <typename scalar_t>
struct KernelVecType {
using q_load_vec_type = void;
using q_vec_type = void;
using k_load_vec_type = void;
......@@ -11,7 +12,8 @@ template <typename scalar_t> struct KernelVecType {
using v_load_vec_type = void;
};
template <> struct KernelVecType<float> {
template <>
struct KernelVecType<float> {
using q_load_vec_type = vec_op::FP32Vec4;
using q_vec_type = vec_op::FP32Vec16;
using k_load_vec_type = vec_op::FP32Vec16;
......@@ -21,7 +23,8 @@ template <> struct KernelVecType<float> {
};
#ifdef __AVX512BF16__
template <> struct KernelVecType<c10::BFloat16> {
template <>
struct KernelVecType<c10::BFloat16> {
using q_load_vec_type = vec_op::BF16Vec8;
using q_vec_type = vec_op::BF16Vec32;
using k_load_vec_type = vec_op::BF16Vec32;
......@@ -30,7 +33,8 @@ template <> struct KernelVecType<c10::BFloat16> {
using v_load_vec_type = vec_op::BF16Vec16;
};
#else
template <> struct KernelVecType<c10::BFloat16> {
template <>
struct KernelVecType<c10::BFloat16> {
using q_load_vec_type = vec_op::BF16Vec8;
using q_vec_type = vec_op::FP32Vec16;
using k_load_vec_type = vec_op::BF16Vec16;
......@@ -41,7 +45,7 @@ template <> struct KernelVecType<c10::BFloat16> {
#endif
template <typename T>
FORCE_INLINE std::pair<T, T> reduceSoftmax(T *data, const int size,
FORCE_INLINE std::pair<T, T> reduceSoftmax(T* data, const int size,
const int capacity) {
T max = data[0];
for (int i = 1; i < size; ++i) {
......@@ -67,10 +71,11 @@ FORCE_INLINE std::pair<T, T> reduceSoftmax(T *data, const int size,
}
template <typename T>
FORCE_INLINE std::pair<T, T>
reduceSoftmaxAlibi(T *data, const int size, const int capacity,
const float alibi_slope, const int start_index,
const int seq_len) {
FORCE_INLINE std::pair<T, T> reduceSoftmaxAlibi(T* data, const int size,
const int capacity,
const float alibi_slope,
const int start_index,
const int seq_len) {
data[0] += alibi_slope * (start_index - seq_len + 1);
T max = data[0];
for (int i = 1; i < size; ++i) {
......@@ -98,7 +103,7 @@ reduceSoftmaxAlibi(T *data, const int size, const int capacity,
}
template <typename T>
FORCE_INLINE void reducePartitonSoftmax(const T *max_data, T *sum_data,
FORCE_INLINE void reducePartitonSoftmax(const T* max_data, T* sum_data,
const int size) {
T max = max_data[0];
for (int i = 1; i < size; ++i) {
......@@ -132,9 +137,9 @@ struct reduceQKBlockKernel {
static_assert(k_load_vec_type::get_elem_num() % x == 0);
static_assert(q_load_vec_type::get_elem_num() * sizeof(scalar_t) == 16);
FORCE_INLINE static void call(const scalar_t *__restrict__ q,
const scalar_t *__restrict__ k_block,
float *__restrict__ logits, float scale,
FORCE_INLINE static void call(const scalar_t* __restrict__ q,
const scalar_t* __restrict__ k_block,
float* __restrict__ logits, float scale,
const int token_num) {
const int group_num = (token_num + TOKEN_PER_GROUP - 1) / TOKEN_PER_GROUP;
......@@ -196,8 +201,8 @@ struct reduceQKBlockKernel {
template <typename scalar_t, int HEAD_SIZE, int BLOCK_SIZE,
int HEAD_PARTITION_SIZE, typename acc_t>
FORCE_INLINE void reduceValueBlock(const float *prob, const scalar_t *v_block,
acc_t &&acc) {
FORCE_INLINE void reduceValueBlock(const float* prob, const scalar_t* v_block,
acc_t&& acc) {
using v_load_vec_type = typename KernelVecType<scalar_t>::v_load_vec_type;
constexpr int ELEM_NUM = v_load_vec_type::get_elem_num();
static_assert(BLOCK_SIZE == ELEM_NUM);
......@@ -209,27 +214,27 @@ FORCE_INLINE void reduceValueBlock(const float *prob, const scalar_t *v_block,
acc[head_elem_idx] = acc[head_elem_idx] + prob_vec * fp32_v_vec;
});
}
}; // namespace
}; // namespace
// Paged attention v1
namespace {
template <typename scalar_t, int HEAD_SIZE, int BLOCK_SIZE>
struct paged_attention_v1_impl {
static void
call(scalar_t *__restrict__ out, // [num_seqs, num_heads, head_size]
const scalar_t *__restrict__ q, // [num_seqs, num_heads, head_size]
const scalar_t *__restrict__ k_cache, // [num_blocks, num_kv_heads,
static void call(
scalar_t* __restrict__ out, // [num_seqs, num_heads, head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const scalar_t* __restrict__ k_cache, // [num_blocks, num_kv_heads,
// head_size/x, block_size, x]
const scalar_t *__restrict__ v_cache, // [num_blocks, num_kv_heads,
const scalar_t* __restrict__ v_cache, // [num_blocks, num_kv_heads,
// head_size, block_size]
const int num_kv_heads, const float scale,
const int
*__restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int *__restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float *__restrict__ alibi_slopes, // [num_heads]
const int q_stride, const int kv_block_stride, const int kv_head_stride,
const int num_seqs, const int num_heads) {
const int num_kv_heads, const float scale,
const int* __restrict__ block_tables, // [num_seqs,
// max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride, const int kv_block_stride, const int kv_head_stride,
const int num_seqs, const int num_heads) {
constexpr int x = 16 / sizeof(scalar_t);
const int num_queries_per_kv = num_heads / num_kv_heads;
......@@ -243,32 +248,31 @@ struct paged_attention_v1_impl {
size_t logits_bytes =
parallel_work_item_num * max_seq_len_padded * sizeof(float);
float *logits = (float *)std::aligned_alloc(
64, logits_bytes); // Cacheline alignment for each context token.
// [parallel_work_item_num, max_seq_len_padded]
float* logits = (float*)std::aligned_alloc(
64, logits_bytes); // Cacheline alignment for each context token.
// [parallel_work_item_num, max_seq_len_padded]
#pragma omp parallel for collapse(2) schedule(dynamic, 1)
for (int seq_idx = 0; seq_idx < num_seqs; ++seq_idx) {
for (int head_idx = 0; head_idx < num_heads; ++head_idx) {
int seq_len = seq_lens[seq_idx];
const int *seq_block_table =
const int* seq_block_table =
block_tables + max_num_blocks_per_seq * seq_idx;
const int block_num = (seq_len + BLOCK_SIZE - 1) / BLOCK_SIZE;
const int64_t kv_head_idx = head_idx / num_queries_per_kv;
const scalar_t *__restrict__ q_vec_ptr =
const scalar_t* __restrict__ q_vec_ptr =
q + seq_idx * q_stride + head_idx * HEAD_SIZE;
const int last_block_token_num =
seq_len - (block_num - 1) * BLOCK_SIZE;
float *__restrict__ thread_block_logits =
const int last_block_token_num = seq_len - (block_num - 1) * BLOCK_SIZE;
float* __restrict__ thread_block_logits =
logits + omp_get_thread_num() * max_seq_len_padded;
// Compute logits
for (int block_idx = 0; block_idx < block_num; ++block_idx) {
const int64_t physical_block_idx = seq_block_table[block_idx];
const scalar_t *__restrict__ k_block_cache_ptr =
const scalar_t* __restrict__ k_block_cache_ptr =
k_cache + physical_block_idx * kv_block_stride +
kv_head_idx * kv_head_stride;
float *__restrict__ head_block_logits =
float* __restrict__ head_block_logits =
thread_block_logits + block_idx * BLOCK_SIZE;
reduceQKBlockKernel<scalar_t, HEAD_SIZE, BLOCK_SIZE, x>::call(
......@@ -282,8 +286,7 @@ struct paged_attention_v1_impl {
block_num * BLOCK_SIZE, alibi_slopes[head_idx], 0,
seq_len);
} else {
reduceSoftmax(thread_block_logits, seq_len,
block_num * BLOCK_SIZE);
reduceSoftmax(thread_block_logits, seq_len, block_num * BLOCK_SIZE);
}
// Compute value
......@@ -293,14 +296,14 @@ struct paged_attention_v1_impl {
for (int head_part_idx = 0; head_part_idx < head_partition_num;
++head_part_idx) {
vec_op::FP32Vec16 accums[head_elem_num_per_partition];
scalar_t *__restrict__ out_ptr =
scalar_t* __restrict__ out_ptr =
out + seq_idx * num_heads * HEAD_SIZE + head_idx * HEAD_SIZE +
head_part_idx * head_elem_num_per_partition;
for (int block_idx = 0; block_idx < block_num; ++block_idx) {
const int64_t physical_block_idx = seq_block_table[block_idx];
const float *__restrict__ prob_vec_ptr =
const float* __restrict__ prob_vec_ptr =
thread_block_logits + block_idx * BLOCK_SIZE;
const scalar_t *__restrict__ v_block_cache_ptr =
const scalar_t* __restrict__ v_block_cache_ptr =
v_cache + physical_block_idx * kv_block_stride +
kv_head_idx * kv_head_stride +
BLOCK_SIZE * head_part_idx * head_elem_num_per_partition;
......@@ -311,7 +314,7 @@ struct paged_attention_v1_impl {
if (block_idx != block_num - 1) {
const int64_t next_physical_block_idx =
seq_block_table[block_idx + 1];
const scalar_t *__restrict__ next_v_block_cache_ptr =
const scalar_t* __restrict__ next_v_block_cache_ptr =
v_cache + next_physical_block_idx * kv_block_stride +
kv_head_idx * kv_head_stride +
BLOCK_SIZE * head_part_idx * head_elem_num_per_partition;
......@@ -340,16 +343,16 @@ struct paged_attention_v1_impl {
#define LAUNCH_V1_ATTENTION_KERNEL(T, HEAD_SIZE, BLOCK_SIZE) \
paged_attention_v1_impl<T, HEAD_SIZE, BLOCK_SIZE>::call( \
out_ptr, query_ptr, key_cache_ptr, value_cache_ptr, num_kv_heads, scale, \
block_tables_ptr, seq_lens_ptr, max_num_blocks_per_seq, \
block_tables_ptr, seq_lens_ptr, max_num_blocks_per_seq, \
alibi_slopes_ptr, q_stride, kv_block_stride, kv_head_stride, num_seqs, \
num_heads);
template <typename T, int BLOCK_SIZE>
void paged_attention_v1_impl_launcher(
torch::Tensor &out, torch::Tensor &query, torch::Tensor &key_cache,
torch::Tensor &value_cache, int num_kv_heads, float scale,
torch::Tensor &block_tables, torch::Tensor &seq_lens,
int max_seq_len, const c10::optional<torch::Tensor> &alibi_slopes) {
torch::Tensor& out, torch::Tensor& query, torch::Tensor& key_cache,
torch::Tensor& value_cache, int num_kv_heads, float scale,
torch::Tensor& block_tables, torch::Tensor& seq_lens, int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes) {
int num_seqs = query.size(0);
int num_heads = query.size(1);
int head_size = query.size(2);
......@@ -359,67 +362,66 @@ void paged_attention_v1_impl_launcher(
int kv_head_stride = key_cache.stride(1);
// NOTE: alibi_slopes is optional.
const float *alibi_slopes_ptr =
const float* alibi_slopes_ptr =
alibi_slopes
? reinterpret_cast<const float *>(alibi_slopes.value().data_ptr())
? reinterpret_cast<const float*>(alibi_slopes.value().data_ptr())
: nullptr;
T *out_ptr = reinterpret_cast<T *>(out.data_ptr());
T *query_ptr = reinterpret_cast<T *>(query.data_ptr());
T *key_cache_ptr = reinterpret_cast<T *>(key_cache.data_ptr());
T *value_cache_ptr = reinterpret_cast<T *>(value_cache.data_ptr());
int *block_tables_ptr = block_tables.data_ptr<int>();
int *seq_lens_ptr = seq_lens.data_ptr<int>();
T* out_ptr = reinterpret_cast<T*>(out.data_ptr());
T* query_ptr = reinterpret_cast<T*>(query.data_ptr());
T* key_cache_ptr = reinterpret_cast<T*>(key_cache.data_ptr());
T* value_cache_ptr = reinterpret_cast<T*>(value_cache.data_ptr());
int* block_tables_ptr = block_tables.data_ptr<int>();
int* seq_lens_ptr = seq_lens.data_ptr<int>();
switch (head_size) {
case 64:
LAUNCH_V1_ATTENTION_KERNEL(T, 64, BLOCK_SIZE);
break;
case 80:
LAUNCH_V1_ATTENTION_KERNEL(T, 80, BLOCK_SIZE);
break;
case 96:
LAUNCH_V1_ATTENTION_KERNEL(T, 96, BLOCK_SIZE);
break;
case 112:
LAUNCH_V1_ATTENTION_KERNEL(T, 112, BLOCK_SIZE);
break;
case 128:
LAUNCH_V1_ATTENTION_KERNEL(T, 128, BLOCK_SIZE);
break;
case 256:
LAUNCH_V1_ATTENTION_KERNEL(T, 256, BLOCK_SIZE);
break;
default:
TORCH_CHECK(false, "Unsupported head size: ", head_size);
break;
case 64:
LAUNCH_V1_ATTENTION_KERNEL(T, 64, BLOCK_SIZE);
break;
case 80:
LAUNCH_V1_ATTENTION_KERNEL(T, 80, BLOCK_SIZE);
break;
case 96:
LAUNCH_V1_ATTENTION_KERNEL(T, 96, BLOCK_SIZE);
break;
case 112:
LAUNCH_V1_ATTENTION_KERNEL(T, 112, BLOCK_SIZE);
break;
case 128:
LAUNCH_V1_ATTENTION_KERNEL(T, 128, BLOCK_SIZE);
break;
case 256:
LAUNCH_V1_ATTENTION_KERNEL(T, 256, BLOCK_SIZE);
break;
default:
TORCH_CHECK(false, "Unsupported head size: ", head_size);
break;
}
}
#define CALL_V1_KERNEL_LAUNCHER(T, BLOCK_SIZE) \
paged_attention_v1_impl_launcher<T, BLOCK_SIZE>( \
out, query, key_cache, value_cache, num_kv_heads, scale, block_tables, \
#define CALL_V1_KERNEL_LAUNCHER(T, BLOCK_SIZE) \
paged_attention_v1_impl_launcher<T, BLOCK_SIZE>( \
out, query, key_cache, value_cache, num_kv_heads, scale, block_tables, \
seq_lens, max_seq_len, alibi_slopes);
#define CALL_V1_KERNEL_LAUNCHER_BLOCK_SIZE(T) \
switch (block_size) { \
case 16: \
CALL_V1_KERNEL_LAUNCHER(T, 16); \
break; \
default: \
TORCH_CHECK(false, "Unsupported block size: ", block_size); \
break; \
#define CALL_V1_KERNEL_LAUNCHER_BLOCK_SIZE(T) \
switch (block_size) { \
case 16: \
CALL_V1_KERNEL_LAUNCHER(T, 16); \
break; \
default: \
TORCH_CHECK(false, "Unsupported block size: ", block_size); \
break; \
}
} // namespace
} // namespace
void paged_attention_v1(torch::Tensor &out, torch::Tensor &query,
torch::Tensor &key_cache, torch::Tensor &value_cache,
void paged_attention_v1(torch::Tensor& out, torch::Tensor& query,
torch::Tensor& key_cache, torch::Tensor& value_cache,
int num_kv_heads, float scale,
torch::Tensor &block_tables,
torch::Tensor &seq_lens, int block_size,
int max_seq_len,
const c10::optional<torch::Tensor> &alibi_slopes,
const std::string &kv_cache_dtype, float kv_scale) {
torch::Tensor& block_tables, torch::Tensor& seq_lens,
int block_size, int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype, float kv_scale) {
TORCH_CHECK(kv_scale == 1.0f);
VLLM_DISPATCH_FLOATING_TYPES(query.scalar_type(), "paged_attention_v1_impl",
[&] {
......@@ -434,23 +436,24 @@ namespace {
template <typename scalar_t, int HEAD_SIZE, int BLOCK_SIZE, int PARTITION_SIZE>
struct paged_attention_v2_impl {
static void call(
scalar_t *__restrict__ out, // [num_seqs, num_heads, head_size]
float *__restrict__ exp_sums, // [num_seqs, num_heads, max_num_partitions]
float
*__restrict__ max_logits, // [num_seqs, num_heads, max_num_partitions]
scalar_t *__restrict__ tmp_out, // [num_seqs, num_heads,
// max_num_partitions, head_size]
const scalar_t *__restrict__ q, // [num_seqs, num_heads, head_size]
const scalar_t *__restrict__ k_cache, // [num_blocks, num_kv_heads,
// head_size/x, block_size, x]
const scalar_t *__restrict__ v_cache, // [num_blocks, num_kv_heads,
// head_size, block_size]
scalar_t* __restrict__ out, // [num_seqs, num_heads, head_size]
float* __restrict__ exp_sums, // [num_seqs, num_heads,
// max_num_partitions]
float* __restrict__ max_logits, // [num_seqs, num_heads,
// max_num_partitions]
scalar_t* __restrict__ tmp_out, // [num_seqs, num_heads,
// max_num_partitions, head_size]
const scalar_t* __restrict__ q, // [num_seqs, num_heads, head_size]
const scalar_t* __restrict__ k_cache, // [num_blocks, num_kv_heads,
// head_size/x, block_size, x]
const scalar_t* __restrict__ v_cache, // [num_blocks, num_kv_heads,
// head_size, block_size]
const int num_kv_heads, const float scale,
const int
*__restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int *__restrict__ seq_lens, // [num_seqs]
const int* __restrict__ block_tables, // [num_seqs,
// max_num_blocks_per_seq]
const int* __restrict__ seq_lens, // [num_seqs]
const int max_num_blocks_per_seq,
const float *__restrict__ alibi_slopes, // [num_heads]
const float* __restrict__ alibi_slopes, // [num_heads]
const int q_stride, const int kv_block_stride, const int kv_head_stride,
const int num_seqs, const int num_heads, const int max_num_partitions) {
constexpr int x = 16 / sizeof(scalar_t);
......@@ -468,8 +471,7 @@ struct paged_attention_v2_impl {
const int seq_len = seq_lens[seq_idx];
const int start_token_idx = partition_idx * PARTITION_SIZE;
if (start_token_idx >= seq_len)
continue;
if (start_token_idx >= seq_len) continue;
const int partition_num =
(seq_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
......@@ -477,15 +479,14 @@ struct paged_attention_v2_impl {
const int token_num =
(std::min(seq_len, start_token_idx + PARTITION_SIZE) -
start_token_idx);
const int block_num =
(token_num + BLOCK_SIZE - 1) / BLOCK_SIZE;
const int block_num = (token_num + BLOCK_SIZE - 1) / BLOCK_SIZE;
const int last_block_token_num =
token_num - (block_num - 1) * BLOCK_SIZE;
const int *seq_block_table = block_tables +
const int* seq_block_table = block_tables +
max_num_blocks_per_seq * seq_idx +
start_token_idx / BLOCK_SIZE;
const int64_t kv_head_idx = head_idx / num_queries_per_kv;
const scalar_t *__restrict__ q_vec_ptr =
const scalar_t* __restrict__ q_vec_ptr =
q + seq_idx * q_stride + head_idx * HEAD_SIZE;
float logits[PARTITION_SIZE] __attribute__((aligned(64))) = {0};
......@@ -493,10 +494,10 @@ struct paged_attention_v2_impl {
// Compute logits
for (int block_idx = 0; block_idx < block_num; ++block_idx) {
const int64_t physical_block_idx = seq_block_table[block_idx];
const scalar_t *__restrict__ k_block_cache_ptr =
const scalar_t* __restrict__ k_block_cache_ptr =
k_cache + physical_block_idx * kv_block_stride +
kv_head_idx * kv_head_stride;
float *__restrict__ head_block_logits =
float* __restrict__ head_block_logits =
logits + block_idx * BLOCK_SIZE;
reduceQKBlockKernel<scalar_t, HEAD_SIZE, BLOCK_SIZE, x>::call(
......@@ -510,13 +511,13 @@ struct paged_attention_v2_impl {
logits, token_num, block_num * BLOCK_SIZE,
alibi_slopes[head_idx], start_token_idx, seq_len);
} else {
max_and_sum = reduceSoftmax(logits, token_num,
block_num * BLOCK_SIZE);
max_and_sum =
reduceSoftmax(logits, token_num, block_num * BLOCK_SIZE);
}
auto &&[max_logit, exp_sum] = max_and_sum;
auto&& [max_logit, exp_sum] = max_and_sum;
scalar_t *__restrict__ output_buffer = nullptr;
scalar_t* __restrict__ output_buffer = nullptr;
if (!no_reduce) {
auto idx = seq_idx * num_heads * max_num_partitions +
head_idx * max_num_partitions + partition_idx;
......@@ -538,13 +539,13 @@ struct paged_attention_v2_impl {
for (int head_part_idx = 0; head_part_idx < head_partition_num;
++head_part_idx) {
vec_op::FP32Vec16 accums[head_elem_num_per_partition];
scalar_t *__restrict__ out_ptr =
scalar_t* __restrict__ out_ptr =
output_buffer + head_part_idx * head_elem_num_per_partition;
for (int block_idx = 0; block_idx < block_num; ++block_idx) {
const int64_t physical_block_idx = seq_block_table[block_idx];
const float *__restrict__ prob_vec_ptr =
const float* __restrict__ prob_vec_ptr =
logits + block_idx * BLOCK_SIZE;
const scalar_t *__restrict__ v_block_cache_ptr =
const scalar_t* __restrict__ v_block_cache_ptr =
v_cache + physical_block_idx * kv_block_stride +
kv_head_idx * kv_head_stride +
BLOCK_SIZE * head_part_idx * head_elem_num_per_partition;
......@@ -555,7 +556,7 @@ struct paged_attention_v2_impl {
if (block_idx != block_num - 1) {
const int64_t next_physical_block_idx =
seq_block_table[block_idx + 1];
const scalar_t *__restrict__ next_v_block_cache_ptr =
const scalar_t* __restrict__ next_v_block_cache_ptr =
v_cache + next_physical_block_idx * kv_block_stride +
kv_head_idx * kv_head_stride +
BLOCK_SIZE * head_part_idx * head_elem_num_per_partition;
......@@ -587,8 +588,7 @@ struct paged_attention_v2_impl {
const int partition_num =
(seq_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
if (partition_num == 1)
continue;
if (partition_num == 1) continue;
reducePartitonSoftmax(
max_logits + seq_idx * num_heads * max_num_partitions +
......@@ -603,11 +603,11 @@ struct paged_attention_v2_impl {
using v_load_vec_type = typename KernelVecType<scalar_t>::v_load_vec_type;
static_assert(v_load_vec_type::get_elem_num() == BLOCK_SIZE);
constexpr int head_elem_num_per_group =
16; // Note: didn't align with the cacheline size, due to some HEAD_SIZE
// didn't align with 64 bytes
16; // Note: didn't align with the cacheline size, due to some
// HEAD_SIZE didn't align with 64 bytes
static_assert(HEAD_SIZE % head_elem_num_per_group == 0);
constexpr int head_group_num = HEAD_SIZE / head_elem_num_per_group;
const float *__restrict__ rescale_factors = exp_sums;
const float* __restrict__ rescale_factors = exp_sums;
#pragma omp parallel for collapse(3) schedule(static, 1)
for (int seq_idx = 0; seq_idx < num_seqs; ++seq_idx) {
for (int head_idx = 0; head_idx < num_heads; ++head_idx) {
......@@ -616,17 +616,16 @@ struct paged_attention_v2_impl {
const int partition_num =
(seq_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
if (partition_num == 1)
continue;
if (partition_num == 1) continue;
const float *__restrict__ seq_head_rescale_factors =
const float* __restrict__ seq_head_rescale_factors =
rescale_factors + seq_idx * num_heads * max_num_partitions +
head_idx * max_num_partitions;
const scalar_t *__restrict__ seq_head_tmp_out =
const scalar_t* __restrict__ seq_head_tmp_out =
tmp_out + seq_idx * num_heads * max_num_partitions * HEAD_SIZE +
head_idx * max_num_partitions * HEAD_SIZE +
group_idx * head_elem_num_per_group;
scalar_t *__restrict__ seq_head_output =
scalar_t* __restrict__ seq_head_output =
out + seq_idx * num_heads * HEAD_SIZE + head_idx * HEAD_SIZE +
group_idx * head_elem_num_per_group;
......@@ -645,21 +644,21 @@ struct paged_attention_v2_impl {
}
};
#define LAUNCH_V2_ATTENTION_KERNEL(T, HEAD_SIZE, BLOCK_SIZE) \
paged_attention_v2_impl<T, HEAD_SIZE, BLOCK_SIZE, PARTITION_SIZE>::call( \
out_ptr, exp_sums_ptr, max_logits_ptr, tmp_out_ptr, query_ptr, \
key_cache_ptr, value_cache_ptr, num_kv_heads, scale, block_tables_ptr, \
seq_lens_ptr, max_num_blocks_per_seq, alibi_slopes_ptr, q_stride, \
kv_block_stride, kv_head_stride, num_seqs, num_heads, \
#define LAUNCH_V2_ATTENTION_KERNEL(T, HEAD_SIZE, BLOCK_SIZE) \
paged_attention_v2_impl<T, HEAD_SIZE, BLOCK_SIZE, PARTITION_SIZE>::call( \
out_ptr, exp_sums_ptr, max_logits_ptr, tmp_out_ptr, query_ptr, \
key_cache_ptr, value_cache_ptr, num_kv_heads, scale, block_tables_ptr, \
seq_lens_ptr, max_num_blocks_per_seq, alibi_slopes_ptr, q_stride, \
kv_block_stride, kv_head_stride, num_seqs, num_heads, \
max_num_partitions);
template <typename T, int BLOCK_SIZE, int PARTITION_SIZE = 512>
void paged_attention_v2_impl_launcher(
torch::Tensor &out, torch::Tensor &exp_sums, torch::Tensor &max_logits,
torch::Tensor &tmp_out, torch::Tensor &query, torch::Tensor &key_cache,
torch::Tensor &value_cache, int num_kv_heads, float scale,
torch::Tensor &block_tables, torch::Tensor &seq_lens, int block_size,
int max_seq_len, const c10::optional<torch::Tensor> &alibi_slopes) {
torch::Tensor& out, torch::Tensor& exp_sums, torch::Tensor& max_logits,
torch::Tensor& tmp_out, torch::Tensor& query, torch::Tensor& key_cache,
torch::Tensor& value_cache, int num_kv_heads, float scale,
torch::Tensor& block_tables, torch::Tensor& seq_lens, int block_size,
int max_seq_len, const c10::optional<torch::Tensor>& alibi_slopes) {
int num_seqs = query.size(0);
int num_heads = query.size(1);
int head_size = query.size(2);
......@@ -670,72 +669,72 @@ void paged_attention_v2_impl_launcher(
int max_num_partitions = exp_sums.size(-1);
// NOTE: alibi_slopes is optional.
const float *alibi_slopes_ptr =
const float* alibi_slopes_ptr =
alibi_slopes
? reinterpret_cast<const float *>(alibi_slopes.value().data_ptr())
? reinterpret_cast<const float*>(alibi_slopes.value().data_ptr())
: nullptr;
T *out_ptr = reinterpret_cast<T *>(out.data_ptr());
float *exp_sums_ptr = reinterpret_cast<float *>(exp_sums.data_ptr());
float *max_logits_ptr = reinterpret_cast<float *>(max_logits.data_ptr());
T *tmp_out_ptr = reinterpret_cast<T *>(tmp_out.data_ptr());
T *query_ptr = reinterpret_cast<T *>(query.data_ptr());
T *key_cache_ptr = reinterpret_cast<T *>(key_cache.data_ptr());
T *value_cache_ptr = reinterpret_cast<T *>(value_cache.data_ptr());
int *block_tables_ptr = block_tables.data_ptr<int>();
int *seq_lens_ptr = seq_lens.data_ptr<int>();
T* out_ptr = reinterpret_cast<T*>(out.data_ptr());
float* exp_sums_ptr = reinterpret_cast<float*>(exp_sums.data_ptr());
float* max_logits_ptr = reinterpret_cast<float*>(max_logits.data_ptr());
T* tmp_out_ptr = reinterpret_cast<T*>(tmp_out.data_ptr());
T* query_ptr = reinterpret_cast<T*>(query.data_ptr());
T* key_cache_ptr = reinterpret_cast<T*>(key_cache.data_ptr());
T* value_cache_ptr = reinterpret_cast<T*>(value_cache.data_ptr());
int* block_tables_ptr = block_tables.data_ptr<int>();
int* seq_lens_ptr = seq_lens.data_ptr<int>();
switch (head_size) {
case 64:
LAUNCH_V2_ATTENTION_KERNEL(T, 64, BLOCK_SIZE);
break;
case 80:
LAUNCH_V2_ATTENTION_KERNEL(T, 80, BLOCK_SIZE);
break;
case 96:
LAUNCH_V2_ATTENTION_KERNEL(T, 96, BLOCK_SIZE);
break;
case 112:
LAUNCH_V2_ATTENTION_KERNEL(T, 112, BLOCK_SIZE);
break;
case 128:
LAUNCH_V2_ATTENTION_KERNEL(T, 128, BLOCK_SIZE);
break;
case 256:
LAUNCH_V2_ATTENTION_KERNEL(T, 256, BLOCK_SIZE);
break;
default:
TORCH_CHECK(false, "Unsupported head size: ", head_size);
break;
case 64:
LAUNCH_V2_ATTENTION_KERNEL(T, 64, BLOCK_SIZE);
break;
case 80:
LAUNCH_V2_ATTENTION_KERNEL(T, 80, BLOCK_SIZE);
break;
case 96:
LAUNCH_V2_ATTENTION_KERNEL(T, 96, BLOCK_SIZE);
break;
case 112:
LAUNCH_V2_ATTENTION_KERNEL(T, 112, BLOCK_SIZE);
break;
case 128:
LAUNCH_V2_ATTENTION_KERNEL(T, 128, BLOCK_SIZE);
break;
case 256:
LAUNCH_V2_ATTENTION_KERNEL(T, 256, BLOCK_SIZE);
break;
default:
TORCH_CHECK(false, "Unsupported head size: ", head_size);
break;
}
}
#define CALL_V2_KERNEL_LAUNCHER(T, BLOCK_SIZE) \
paged_attention_v2_impl_launcher<T, BLOCK_SIZE>( \
out, exp_sums, max_logits, tmp_out, query, key_cache, value_cache, \
num_kv_heads, scale, block_tables, seq_lens, block_size, \
max_seq_len, alibi_slopes);
#define CALL_V2_KERNEL_LAUNCHER_BLOCK_SIZE(T) \
switch (block_size) { \
case 16: \
CALL_V2_KERNEL_LAUNCHER(T, 16); \
break; \
default: \
TORCH_CHECK(false, "Unsupported block size: ", block_size); \
break; \
#define CALL_V2_KERNEL_LAUNCHER(T, BLOCK_SIZE) \
paged_attention_v2_impl_launcher<T, BLOCK_SIZE>( \
out, exp_sums, max_logits, tmp_out, query, key_cache, value_cache, \
num_kv_heads, scale, block_tables, seq_lens, block_size, max_seq_len, \
alibi_slopes);
#define CALL_V2_KERNEL_LAUNCHER_BLOCK_SIZE(T) \
switch (block_size) { \
case 16: \
CALL_V2_KERNEL_LAUNCHER(T, 16); \
break; \
default: \
TORCH_CHECK(false, "Unsupported block size: ", block_size); \
break; \
}
} // namespace
void paged_attention_v2(torch::Tensor &out, torch::Tensor &exp_sums,
torch::Tensor &max_logits, torch::Tensor &tmp_out,
torch::Tensor &query, torch::Tensor &key_cache,
torch::Tensor &value_cache, int num_kv_heads,
float scale, torch::Tensor &block_tables,
torch::Tensor &seq_lens, int block_size,
} // namespace
void paged_attention_v2(torch::Tensor& out, torch::Tensor& exp_sums,
torch::Tensor& max_logits, torch::Tensor& tmp_out,
torch::Tensor& query, torch::Tensor& key_cache,
torch::Tensor& value_cache, int num_kv_heads,
float scale, torch::Tensor& block_tables,
torch::Tensor& seq_lens, int block_size,
int max_seq_len,
const c10::optional<torch::Tensor> &alibi_slopes,
const std::string &kv_cache_dtype, float kv_scale) {
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype, float kv_scale) {
TORCH_CHECK(kv_scale == 1.0f);
VLLM_DISPATCH_FLOATING_TYPES(query.scalar_type(), "paged_attention_v2_impl",
[&] {
......
csrc/cpu/cache.cpp
View file @ 5f6d10c1
......@@ -5,25 +5,26 @@
namespace {
template <typename scalar_t>
void copy_blocks_cpu_impl(
std::vector<torch::Tensor> &key_caches,
std::vector<torch::Tensor> &value_caches,
const torch::Tensor& mapping_pairs,
const int element_num_per_block, const int layer_num) {
void copy_blocks_cpu_impl(std::vector<torch::Tensor>& key_caches,
std::vector<torch::Tensor>& value_caches,
const torch::Tensor& mapping_pairs,
const int element_num_per_block,
const int layer_num) {
const size_t pair_num = mapping_pairs.size(0);
const size_t block_bytes = sizeof(scalar_t) * element_num_per_block;
#pragma omp parallel for collapse(2)
for (int layer = 0; layer < layer_num; ++layer) {
for (size_t pair = 0; pair < pair_num; ++pair) {
int64_t source_offset = element_num_per_block * mapping_pairs[pair][0].item<int64_t>();
int64_t source_offset =
element_num_per_block * mapping_pairs[pair][0].item<int64_t>();
int64_t target_offset =
element_num_per_block * mapping_pairs[pair][1].item<int64_t>();
scalar_t *key_cache_ptr = key_caches[layer].data_ptr<scalar_t>();
scalar_t *source_ptr = key_cache_ptr + source_offset;
scalar_t *target_ptr = key_cache_ptr + target_offset;
scalar_t* key_cache_ptr = key_caches[layer].data_ptr<scalar_t>();
scalar_t* source_ptr = key_cache_ptr + source_offset;
scalar_t* target_ptr = key_cache_ptr + target_offset;
std::memcpy(target_ptr, source_ptr, block_bytes);
scalar_t *value_cache_ptr = value_caches[layer].data_ptr<scalar_t>();
scalar_t* value_cache_ptr = value_caches[layer].data_ptr<scalar_t>();
source_ptr = value_cache_ptr + source_offset;
target_ptr = value_cache_ptr + target_offset;
std::memcpy(target_ptr, source_ptr, block_bytes);
......@@ -33,9 +34,9 @@ void copy_blocks_cpu_impl(
template <typename scalar_t>
void reshape_and_cache_cpu_impl(
const scalar_t *__restrict__ key, const scalar_t *__restrict__ value,
scalar_t *__restrict__ key_cache, scalar_t *__restrict__ value_cache,
const int64_t *__restrict__ slot_mapping, const int num_tokens,
const scalar_t* __restrict__ key, const scalar_t* __restrict__ value,
scalar_t* __restrict__ key_cache, scalar_t* __restrict__ value_cache,
const int64_t* __restrict__ slot_mapping, const int num_tokens,
const int key_stride, const int value_stride, const int num_heads,
const int head_size, const int block_size, const int x) {
const int block_elem_num = num_heads * head_size * block_size;
......@@ -48,14 +49,14 @@ void reshape_and_cache_cpu_impl(
int src_key_head_idx = token_idx * key_stride + head_idx * head_size;
int src_value_head_idx =
token_idx * value_stride + head_idx * head_size;
const scalar_t *src_key_head_ptr = key + src_key_head_idx;
const scalar_t *src_value_head_ptr = value + src_value_head_idx;
const scalar_t* src_key_head_ptr = key + src_key_head_idx;
const scalar_t* src_value_head_ptr = value + src_value_head_idx;
const int64_t block_index = slot_idx / block_size;
const int64_t block_offset = slot_idx % block_size;
scalar_t *target_key_head_ptr = key_cache +
scalar_t* target_key_head_ptr = key_cache +
block_elem_num * block_index +
head_idx * block_size * head_size;
scalar_t *target_value_head_ptr = value_cache +
scalar_t* target_value_head_ptr = value_cache +
block_elem_num * block_index +
head_idx * block_size * head_size;
......@@ -79,10 +80,10 @@ void reshape_and_cache_cpu_impl(
}
}
}
}; // namespace
}; // namespace
void copy_blocks(std::vector<torch::Tensor> &key_caches,
std::vector<torch::Tensor> &value_caches,
void copy_blocks(std::vector<torch::Tensor>& key_caches,
std::vector<torch::Tensor>& value_caches,
const torch::Tensor& block_mapping) {
unsigned num_layers = key_caches.size();
TORCH_CHECK(num_layers == value_caches.size());
......@@ -100,10 +101,10 @@ void copy_blocks(std::vector<torch::Tensor> &key_caches,
});
}
void reshape_and_cache(torch::Tensor &key, torch::Tensor &value,
torch::Tensor &key_cache, torch::Tensor &value_cache,
torch::Tensor &slot_mapping,
const std::string &kv_cache_dtype, float kv_scale) {
void reshape_and_cache(torch::Tensor& key, torch::Tensor& value,
torch::Tensor& key_cache, torch::Tensor& value_cache,
torch::Tensor& slot_mapping,
const std::string& kv_cache_dtype, float kv_scale) {
TORCH_CHECK(kv_scale == 1.0f);
int num_tokens = key.size(0);
......@@ -127,7 +128,7 @@ void reshape_and_cache(torch::Tensor &key, torch::Tensor &value,
});
}
void swap_blocks(torch::Tensor &src, torch::Tensor &dst,
const torch::Tensor&block_mapping) {
void swap_blocks(torch::Tensor& src, torch::Tensor& dst,
const torch::Tensor& block_mapping) {
TORCH_CHECK(false, "swap_blocks is unsupported on CPU.")
}
csrc/cpu/layernorm.cpp
View file @ 5f6d10c1
......@@ -2,10 +2,10 @@
namespace {
template <typename scalar_t>
void rms_norm_impl(scalar_t *__restrict__ out,
const scalar_t *__restrict__ input,
const scalar_t *__restrict__ weight, const float epsilon,
const int num_tokens, const int hidden_size) {
void rms_norm_impl(scalar_t* __restrict__ out,
const scalar_t* __restrict__ input,
const scalar_t* __restrict__ weight, const float epsilon,
const int num_tokens, const int hidden_size) {
using scalar_vec_t = vec_op::vec_t<scalar_t>;
constexpr int VEC_ELEM_NUM = scalar_vec_t::get_elem_num();
TORCH_CHECK(hidden_size % VEC_ELEM_NUM == 0);
......@@ -41,11 +41,11 @@ void rms_norm_impl(scalar_t *__restrict__ out,
}
template <typename scalar_t>
void fused_add_rms_norm_impl(scalar_t *__restrict__ input,
scalar_t *__restrict__ residual,
const scalar_t *__restrict__ weight,
const float epsilon, const int num_tokens,
const int hidden_size) {
void fused_add_rms_norm_impl(scalar_t* __restrict__ input,
scalar_t* __restrict__ residual,
const scalar_t* __restrict__ weight,
const float epsilon, const int num_tokens,
const int hidden_size) {
using scalar_vec_t = vec_op::vec_t<scalar_t>;
constexpr int VEC_ELEM_NUM = scalar_vec_t::get_elem_num();
TORCH_CHECK(hidden_size % VEC_ELEM_NUM == 0);
......@@ -85,24 +85,24 @@ void fused_add_rms_norm_impl(scalar_t *__restrict__ input,
}
}
}
} // namespace
} // namespace
void rms_norm(torch::Tensor &out, torch::Tensor &input,
torch::Tensor &weight, float epsilon) {
void rms_norm(torch::Tensor& out, torch::Tensor& input, torch::Tensor& weight,
float epsilon) {
int hidden_size = input.size(-1);
int num_tokens = input.numel() / hidden_size;
VLLM_DISPATCH_FLOATING_TYPES(input.scalar_type(), "rms_norm_impl", [&] {
CPU_KERNEL_GUARD_IN(rms_norm_impl)
rms_norm_impl(out.data_ptr<scalar_t>(), input.data_ptr<scalar_t>(),
weight.data_ptr<scalar_t>(), epsilon, num_tokens,
hidden_size);
weight.data_ptr<scalar_t>(), epsilon, num_tokens,
hidden_size);
CPU_KERNEL_GUARD_OUT(rms_norm_impl)
});
}
void fused_add_rms_norm(torch::Tensor &input, torch::Tensor &residual,
torch::Tensor &weight, float epsilon) {
void fused_add_rms_norm(torch::Tensor& input, torch::Tensor& residual,
torch::Tensor& weight, float epsilon) {
int hidden_size = input.size(-1);
int num_tokens = input.numel() / hidden_size;
......
csrc/cpu/pos_encoding.cpp
View file @ 5f6d10c1
......@@ -4,16 +4,16 @@
namespace {
template <typename scalar_t>
void rotary_embedding_impl(
const int64_t
*__restrict__ positions, // [batch_size, seq_len] or [num_tokens]
scalar_t
*__restrict__ query, /// [batch_size, seq_len, num_heads, head_size] or
/// [num_tokens, num_heads, head_size]
scalar_t
*__restrict__ key, // [batch_size, seq_len, num_kv_heads, head_size] or
// [num_tokens, num_kv_heads, head_size]
const scalar_t
*__restrict__ cos_sin_cache, // [max_position, 2, rot_dim // 2]
const int64_t* __restrict__ positions, // [batch_size, seq_len] or
// [num_tokens]
scalar_t* __restrict__ query, /// [batch_size, seq_len, num_heads,
/// head_size] or [num_tokens, num_heads,
/// head_size]
scalar_t* __restrict__ key, // [batch_size, seq_len, num_kv_heads,
// head_size] or [num_tokens, num_kv_heads,
// head_size]
const scalar_t* __restrict__ cos_sin_cache, // [max_position, 2, rot_dim //
// 2]
const int rot_dim, const int64_t query_stride, const int64_t key_stride,
const int num_heads, const int num_kv_heads, const int head_size,
const int num_tokens) {
......@@ -26,7 +26,7 @@ void rotary_embedding_impl(
#pragma omp parallel for
for (int token_idx = 0; token_idx < num_tokens; ++token_idx) {
int64_t pos = positions[token_idx];
const scalar_t *cache_ptr = cos_sin_cache + pos * rot_dim;
const scalar_t* cache_ptr = cos_sin_cache + pos * rot_dim;
for (int i = 0; i < num_heads; ++i) {
const int head_idx = i;
......@@ -94,16 +94,16 @@ void rotary_embedding_impl(
template <typename scalar_t>
void rotary_embedding_gptj_impl(
const int64_t
*__restrict__ positions, // [batch_size, seq_len] or [num_tokens]
scalar_t
*__restrict__ query, /// [batch_size, seq_len, num_heads, head_size] or
/// [num_tokens, num_heads, head_size]
scalar_t
*__restrict__ key, // [batch_size, seq_len, num_kv_heads, head_size] or
// [num_tokens, num_kv_heads, head_size]
const scalar_t
*__restrict__ cos_sin_cache, // [max_position, 2, rot_dim // 2]
const int64_t* __restrict__ positions, // [batch_size, seq_len] or
// [num_tokens]
scalar_t* __restrict__ query, /// [batch_size, seq_len, num_heads,
/// head_size] or [num_tokens, num_heads,
/// head_size]
scalar_t* __restrict__ key, // [batch_size, seq_len, num_kv_heads,
// head_size] or [num_tokens, num_kv_heads,
// head_size]
const scalar_t* __restrict__ cos_sin_cache, // [max_position, 2, rot_dim //
// 2]
const int rot_dim, const int64_t query_stride, const int64_t key_stride,
const int num_heads, const int num_kv_heads, const int head_size,
const int num_tokens) {
......@@ -113,13 +113,13 @@ void rotary_embedding_gptj_impl(
for (int token_idx = 0; token_idx < num_tokens; ++token_idx) {
for (int i = 0; i < num_heads; ++i) {
int64_t pos = positions[token_idx];
const scalar_t *cache_ptr = cos_sin_cache + pos * rot_dim;
const scalar_t *cos_cache_ptr = cache_ptr;
const scalar_t *sin_cache_ptr = cache_ptr + embed_dim;
const scalar_t* cache_ptr = cos_sin_cache + pos * rot_dim;
const scalar_t* cos_cache_ptr = cache_ptr;
const scalar_t* sin_cache_ptr = cache_ptr + embed_dim;
const int head_idx = i;
const int64_t token_head =
token_idx * query_stride + head_idx * head_size;
scalar_t *head_query = token_head + query;
scalar_t* head_query = token_head + query;
for (int j = 0; j < embed_dim; j += 1) {
const int rot_offset = j;
const int x_index = 2 * rot_offset;
......@@ -141,12 +141,12 @@ void rotary_embedding_gptj_impl(
for (int token_idx = 0; token_idx < num_tokens; ++token_idx) {
for (int i = 0; i < num_kv_heads; ++i) {
int64_t pos = positions[token_idx];
const scalar_t *cache_ptr = cos_sin_cache + pos * rot_dim;
const scalar_t *cos_cache_ptr = cache_ptr;
const scalar_t *sin_cache_ptr = cache_ptr + embed_dim;
const scalar_t* cache_ptr = cos_sin_cache + pos * rot_dim;
const scalar_t* cos_cache_ptr = cache_ptr;
const scalar_t* sin_cache_ptr = cache_ptr + embed_dim;
const int head_idx = i;
const int64_t token_head = token_idx * key_stride + head_idx * head_size;
scalar_t *head_key = key + token_head;
scalar_t* head_key = key + token_head;
for (int j = 0; j < embed_dim; j += 1) {
const int rot_offset = j;
const int x_index = 2 * rot_offset;
......@@ -164,11 +164,11 @@ void rotary_embedding_gptj_impl(
}
}
}
}; // namespace
}; // namespace
void rotary_embedding(torch::Tensor &positions, torch::Tensor &query,
torch::Tensor &key, int head_size,
torch::Tensor &cos_sin_cache, bool is_neox) {
void rotary_embedding(torch::Tensor& positions, torch::Tensor& query,
torch::Tensor& key, int head_size,
torch::Tensor& cos_sin_cache, bool is_neox) {
int num_tokens = query.numel() / query.size(-1);
int rot_dim = cos_sin_cache.size(1);
int num_heads = query.size(-1) / head_size;
......
csrc/cpu/pybind.cpp
View file @ 5f6d10c1
......@@ -8,66 +8,37 @@ PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
pybind11::module ops = m.def_submodule("ops", "vLLM custom operators");
// Attention ops
ops.def(
"paged_attention_v1",
&paged_attention_v1,
"Compute the attention between an input query and the cached keys/values using PagedAttention.");
ops.def(
"paged_attention_v2",
&paged_attention_v2,
"PagedAttention V2.");
ops.def("paged_attention_v1", &paged_attention_v1,
"Compute the attention between an input query and the cached "
"keys/values using PagedAttention.");
ops.def("paged_attention_v2", &paged_attention_v2, "PagedAttention V2.");
// Activation ops
ops.def(
"silu_and_mul",
&silu_and_mul,
"Activation function used in SwiGLU.");
ops.def(
"gelu_and_mul",
&gelu_and_mul,
"Activation function used in GeGLU with `none` approximation.");
ops.def(
"gelu_tanh_and_mul",
&gelu_tanh_and_mul,
"Activation function used in GeGLU with `tanh` approximation.");
ops.def(
"gelu_new",
&gelu_new,
"GELU implementation used in GPT-2.");
ops.def(
"gelu_fast",
&gelu_fast,
"Approximate GELU implementation.");
ops.def("silu_and_mul", &silu_and_mul, "Activation function used in SwiGLU.");
ops.def("gelu_and_mul", &gelu_and_mul,
"Activation function used in GeGLU with `none` approximation.");
ops.def("gelu_tanh_and_mul", &gelu_tanh_and_mul,
"Activation function used in GeGLU with `tanh` approximation.");
ops.def("gelu_new", &gelu_new, "GELU implementation used in GPT-2.");
ops.def("gelu_fast", &gelu_fast, "Approximate GELU implementation.");
// Layernorm
ops.def(
"rms_norm",
&rms_norm,
"Apply Root Mean Square (RMS) Normalization to the input tensor.");
ops.def("rms_norm", &rms_norm,
"Apply Root Mean Square (RMS) Normalization to the input tensor.");
ops.def(
"fused_add_rms_norm",
&fused_add_rms_norm,
"In-place fused Add and RMS Normalization");
ops.def("fused_add_rms_norm", &fused_add_rms_norm,
"In-place fused Add and RMS Normalization");
// Rotary embedding
ops.def(
"rotary_embedding",
&rotary_embedding,
"Apply GPT-NeoX or GPT-J style rotary embedding to query and key");
ops.def("rotary_embedding", &rotary_embedding,
"Apply GPT-NeoX or GPT-J style rotary embedding to query and key");
// Cache ops
pybind11::module cache_ops = m.def_submodule("cache_ops", "vLLM cache ops");
cache_ops.def(
"swap_blocks",
&swap_blocks,
"Swap in (out) the cache blocks from src to dst");
cache_ops.def(
"copy_blocks",
&copy_blocks,
"Copy the cache blocks from src to dst");
cache_ops.def(
"reshape_and_cache",
&reshape_and_cache,
"Reshape the key and value tensors and cache them");
cache_ops.def("swap_blocks", &swap_blocks,
"Swap in (out) the cache blocks from src to dst");
cache_ops.def("copy_blocks", &copy_blocks,
"Copy the cache blocks from src to dst");
cache_ops.def("reshape_and_cache", &reshape_and_cache,
"Reshape the key and value tensors and cache them");
}
csrc/cuda_compat.h
View file @ 5f6d10c1
#pragma once
#ifdef USE_ROCM
#include <hip/hip_runtime.h>
#include <hip/hip_runtime.h>
#endif
#ifndef USE_ROCM
......@@ -17,7 +17,8 @@
#endif
#ifndef USE_ROCM
#define VLLM_SHFL_XOR_SYNC(var, lane_mask) __shfl_xor_sync(uint32_t(-1), var, lane_mask)
#define VLLM_SHFL_XOR_SYNC(var, lane_mask) \
__shfl_xor_sync(uint32_t(-1), var, lane_mask)
#else
#define VLLM_SHFL_XOR_SYNC(var, lane_mask) __shfl_xor(var, lane_mask)
#endif
......@@ -29,7 +30,8 @@
#endif
#ifndef USE_ROCM
#define VLLM_SHFL_DOWN_SYNC(var, lane_delta) __shfl_down_sync(uint32_t(-1), var, lane_delta)
#define VLLM_SHFL_DOWN_SYNC(var, lane_delta) \
__shfl_down_sync(uint32_t(-1), var, lane_delta)
#else
#define VLLM_SHFL_DOWN_SYNC(var, lane_delta) __shfl_down(var, lane_delta)
#endif
......@@ -41,4 +43,3 @@
#define VLLM_DevFuncAttribute_SET_MaxDynamicSharedMemorySize(FUNC, VAL) \
hipFuncSetAttribute(FUNC, hipFuncAttributeMaxDynamicSharedMemorySize, VAL)
#endif
csrc/cuda_utils.h
View file @ 5f6d10c1
......@@ -2,9 +2,6 @@
#include <torch/extension.h>
int get_device_attribute(
int attribute,
int device_id);
int get_device_attribute(int attribute, int device_id);
int get_max_shared_memory_per_block_device_attribute(
int device_id);
int get_max_shared_memory_per_block_device_attribute(int device_id);
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