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Commit 1591c68f authored by zhuwenwen's avatar zhuwenwen
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merge v0.4.2

parents 09bcf00b c7f2cf2b
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Showing with 2129 additions and 144 deletions
benchmarks/kernels/benchmark_mixtral_moe.py
View file @ 1591c68f
import argparse
import json
import os
import sys
......@@ -5,6 +6,7 @@ import sys
import torch
import torch.nn.functional as F
import triton
from tqdm import tqdm
from vllm.model_executor.layers.fused_moe import (fused_moe,
get_config_file_name)
......@@ -12,16 +14,16 @@ from vllm.model_executor.layers.fused_moe import (fused_moe,
os.environ['CUDA_VISIBLE_DEVICES'] = '0'
def main():
def main(dtype: str):
method = fused_moe
for bs in [
1, 2, 4, 8, 16, 24, 32, 48, 64, 96, 128, 256, 512, 1024, 1536,
2048, 3072, 4096
]:
run_grid(bs, method=method)
run_grid(bs, method=method, dtype=dtype)
def run_grid(bs, method):
def run_grid(bs, method, dtype: str):
d_model = 4096
num_total_experts = 8
top_k = 2
......@@ -34,39 +36,29 @@ def run_grid(bs, method):
num_trials = 1
configs = []
if bs <= 16:
BLOCK_SIZES_M = [16]
elif bs <= 32:
BLOCK_SIZES_M = [16, 32]
elif bs <= 64:
BLOCK_SIZES_M = [16, 32, 64]
elif bs <= 128:
BLOCK_SIZES_M = [16, 32, 64, 128]
else:
BLOCK_SIZES_M = [16, 32, 64, 128, 256]
for block_size_n in [32, 64, 128, 256]:
for block_size_m in BLOCK_SIZES_M:
for block_size_m in [16, 32, 64, 128, 256]:
for block_size_k in [64, 128, 256]:
for group_size_m in [1, 16, 32, 64]:
for num_warps in [4, 8]:
configs.append({
"BLOCK_SIZE_M": block_size_m,
"BLOCK_SIZE_N": block_size_n,
"BLOCK_SIZE_K": block_size_k,
"GROUP_SIZE_M": group_size_m,
"num_warps": num_warps,
"num_stages": 4,
})
for num_stages in [2, 3, 4, 5]:
configs.append({
"BLOCK_SIZE_M": block_size_m,
"BLOCK_SIZE_N": block_size_n,
"BLOCK_SIZE_K": block_size_k,
"GROUP_SIZE_M": group_size_m,
"num_warps": num_warps,
"num_stages": num_stages,
})
best_config = None
best_time_us = 1e20
for config in configs:
print(f'{tp_size=} {bs=}')
print(f'{config}')
print(f'{tp_size=} {bs=}')
for config in tqdm(configs):
# warmup
print('warming up')
try:
for _ in range(num_warmup_trials):
run_timing(
......@@ -79,12 +71,12 @@ def run_grid(bs, method):
model_intermediate_size=model_intermediate_size,
method=method,
config=config,
dtype=dtype,
)
except triton.runtime.autotuner.OutOfResources:
continue
# trial
print('benchmarking')
for _ in range(num_trials):
kernel_dur_ms = run_timing(
num_calls=num_calls,
......@@ -96,6 +88,7 @@ def run_grid(bs, method):
model_intermediate_size=model_intermediate_size,
method=method,
config=config,
dtype=dtype,
)
kernel_dur_us = 1000 * kernel_dur_ms
......@@ -105,16 +98,18 @@ def run_grid(bs, method):
best_config = config
best_time_us = kernel_dur_us
print(f'{kernel_dur_us=:.1f} {model_dur_ms=:.1f}'
f' {bs=} {tp_size=} {top_k=} {num_total_experts=} '
f'{d_model=} {model_intermediate_size=} {num_layers=}')
tqdm.write(
f'{kernel_dur_us=:.1f} {model_dur_ms=:.1f}'
f' {bs=} {tp_size=} {top_k=} {num_total_experts=} '
f'{d_model=} {model_intermediate_size=} {num_layers=}')
print("best_time_us", best_time_us)
print("best_config", best_config)
# holds Dict[str, Dict[str, int]]
filename = get_config_file_name(num_total_experts,
model_intermediate_size // tp_size)
model_intermediate_size // tp_size,
"float8" if dtype == "float8" else None)
print(f"writing config to file {filename}")
existing_content = {}
if os.path.exists(filename):
......@@ -128,27 +123,48 @@ def run_grid(bs, method):
def run_timing(num_calls: int, bs: int, d_model: int, num_total_experts: int,
top_k: int, tp_size: int, model_intermediate_size: int, method,
config) -> float:
config, dtype: str) -> float:
shard_intermediate_size = model_intermediate_size // tp_size
hidden_states = torch.rand(
(bs, d_model),
device="cuda:0",
dtype=torch.bfloat16,
dtype=torch.float16,
)
ws = torch.rand(
w1 = torch.rand(
(num_total_experts, 2 * shard_intermediate_size, d_model),
device=hidden_states.device,
dtype=hidden_states.dtype,
)
w2s = torch.rand(
w2 = torch.rand(
(num_total_experts, d_model, shard_intermediate_size),
device=hidden_states.device,
dtype=hidden_states.dtype,
)
w1_scale = None
w2_scale = None
a1_scale = None
a2_scale = None
if dtype == "float8":
w1 = w1.to(torch.float8_e4m3fn)
w2 = w2.to(torch.float8_e4m3fn)
w1_scale = torch.ones(num_total_experts,
device=hidden_states.device,
dtype=torch.float32)
w2_scale = torch.ones(num_total_experts,
device=hidden_states.device,
dtype=torch.float32)
a1_scale = torch.ones(1,
device=hidden_states.device,
dtype=torch.float32)
a2_scale = torch.ones(1,
device=hidden_states.device,
dtype=torch.float32)
gating_output = F.softmax(torch.rand(
(num_calls, bs, num_total_experts),
device=hidden_states.device,
......@@ -163,13 +179,18 @@ def run_timing(num_calls: int, bs: int, d_model: int, num_total_experts: int,
for i in range(num_calls):
hidden_states = method(
hidden_states=hidden_states,
w1=ws,
w2=w2s,
w1=w1,
w2=w2,
w1_scale=w1_scale,
w2_scale=w2_scale,
a1_scale=a1_scale,
a2_scale=a2_scale,
gating_output=gating_output[i],
topk=2,
renormalize=True,
inplace=True,
override_config=config,
use_fp8=dtype == "float8",
)
end_event.record()
end_event.synchronize()
......@@ -179,4 +200,16 @@ def run_timing(num_calls: int, bs: int, d_model: int, num_total_experts: int,
if __name__ == "__main__":
sys.exit(main())
parser = argparse.ArgumentParser(
prog='benchmark_mixtral_moe',
description='Benchmark and tune the fused_moe kernel',
)
parser.add_argument(
'--dtype',
type=str,
default='auto',
choices=['float8', 'float16'],
help='Data type used for fused_moe kernel computations',
)
args = parser.parse_args()
sys.exit(main(args.dtype))
benchmarks/kernels/benchmark_paged_attention.py
View file @ 1591c68f
......@@ -16,7 +16,7 @@ PARTITION_SIZE = 512
def main(
version: str,
num_seqs: int,
context_len: int,
seq_len: int,
num_query_heads: int,
num_kv_heads: int,
head_size: int,
......@@ -48,12 +48,12 @@ def main(
dtype=torch.float,
device=device)
context_lens = [context_len for _ in range(num_seqs)]
max_context_len = max(context_lens)
context_lens = torch.tensor(context_lens, dtype=torch.int, device=device)
seq_lens = [seq_len for _ in range(num_seqs)]
max_seq_len = max(seq_lens)
seq_lens = torch.tensor(seq_lens, dtype=torch.int, device=device)
# Create the block tables.
max_num_blocks_per_seq = (max_context_len + block_size - 1) // block_size
max_num_blocks_per_seq = (max_seq_len + block_size - 1) // block_size
block_tables = []
for _ in range(num_seqs):
block_table = [
......@@ -77,8 +77,7 @@ def main(
# Prepare for the paged attention kernel.
output = torch.empty_like(query)
if version == "v2":
num_partitions = ((max_context_len + PARTITION_SIZE - 1) //
PARTITION_SIZE)
num_partitions = ((max_seq_len + PARTITION_SIZE - 1) // PARTITION_SIZE)
tmp_output = torch.empty(
size=(num_seqs, num_query_heads, num_partitions, head_size),
dtype=output.dtype,
......@@ -110,9 +109,9 @@ def main(
num_kv_heads,
scale,
block_tables,
context_lens,
seq_lens,
block_size,
max_context_len,
max_seq_len,
alibi_slopes,
kv_cache_dtype,
kv_scale,
......@@ -129,9 +128,9 @@ def main(
num_kv_heads,
scale,
block_tables,
context_lens,
seq_lens,
block_size,
max_context_len,
max_seq_len,
alibi_slopes,
kv_cache_dtype,
kv_scale,
......@@ -166,7 +165,7 @@ if __name__ == '__main__':
choices=["v1", "v2"],
default="v2")
parser.add_argument("--batch-size", type=int, default=8)
parser.add_argument("--context-len", type=int, default=4096)
parser.add_argument("--seq_len", type=int, default=4096)
parser.add_argument("--num-query-heads", type=int, default=64)
parser.add_argument("--num-kv-heads", type=int, default=8)
parser.add_argument("--head-size",
......@@ -199,7 +198,7 @@ if __name__ == '__main__':
main(
version=args.version,
num_seqs=args.batch_size,
context_len=args.context_len,
seq_len=args.seq_len,
num_query_heads=args.num_query_heads,
num_kv_heads=args.num_kv_heads,
head_size=args.head_size,
......
csrc/attention/attention_kernels.cu
View file @ 1591c68f
......@@ -104,7 +104,7 @@ __device__ void paged_attention_kernel(
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__ context_lens, // [num_seqs]
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,
......@@ -115,23 +115,23 @@ __device__ void paged_attention_kernel(
const int partition_idx = blockIdx.z;
const int max_num_partitions = gridDim.z;
constexpr bool USE_PARTITIONING = PARTITION_SIZE > 0;
const int context_len = context_lens[seq_idx];
if (USE_PARTITIONING && partition_idx * PARTITION_SIZE >= context_len) {
const int seq_len = seq_lens[seq_idx];
if (USE_PARTITIONING && partition_idx * PARTITION_SIZE >= seq_len) {
// No work to do. Terminate the thread block.
return;
}
const int num_context_blocks = DIVIDE_ROUND_UP(context_len, BLOCK_SIZE);
const int num_blocks_per_partition = USE_PARTITIONING ? PARTITION_SIZE / BLOCK_SIZE : num_context_blocks;
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;
// [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_context_blocks);
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, context_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);
......@@ -245,12 +245,12 @@ __device__ void paged_attention_kernel(
// 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);
// Add the ALiBi bias if slopes are given.
qk += (alibi_slope != 0) ? alibi_slope * (token_idx - context_len + 1) : 0;
qk += (alibi_slope != 0) ? alibi_slope * (token_idx - seq_len + 1) : 0;
if (thread_group_offset == 0) {
// Store the partial reductions to shared memory.
// NOTE(woosuk): It is required to zero out the masked logits.
const bool mask = token_idx >= context_len;
const bool mask = token_idx >= seq_len;
logits[token_idx - start_token_idx] = mask ? 0.f : qk;
// Update the max value.
qk_max = mask ? qk_max : fmaxf(qk_max, qk);
......@@ -364,14 +364,14 @@ __device__ void paged_attention_kernel(
} else {
v_vec = *reinterpret_cast<const V_vec*>(v_ptr + offset);
}
if (block_idx == num_context_blocks - 1) {
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
scalar_t* v_vec_ptr = reinterpret_cast<scalar_t*>(&v_vec);
#pragma unroll
for (int j = 0; j < V_VEC_SIZE; j++) {
v_vec_ptr[j] = token_idx + j < context_len ? v_vec_ptr[j] : zero_value;
v_vec_ptr[j] = token_idx + j < seq_len ? v_vec_ptr[j] : zero_value;
}
}
accs[i] += dot(logits_vec, v_vec);
......@@ -457,7 +457,7 @@ __global__ void paged_attention_v1_kernel(
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__ context_lens, // [num_seqs]
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,
......@@ -466,7 +466,7 @@ __global__ void paged_attention_v1_kernel(
const float kv_scale) {
paged_attention_kernel<scalar_t, cache_t, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, IS_FP8_KV_CACHE>(
/* exp_sums */ nullptr, /* max_logits */ nullptr,
out, q, k_cache, v_cache, num_kv_heads, scale, block_tables, context_lens,
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);
}
......@@ -489,7 +489,7 @@ __global__ void paged_attention_v2_kernel(
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__ context_lens, // [num_seqs]
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,
......@@ -498,7 +498,7 @@ __global__ void paged_attention_v2_kernel(
const float kv_scale) {
paged_attention_kernel<scalar_t, cache_t, HEAD_SIZE, BLOCK_SIZE, NUM_THREADS, IS_FP8_KV_CACHE, PARTITION_SIZE>(
exp_sums, max_logits, tmp_out, q, k_cache, v_cache, num_kv_heads, scale,
block_tables, context_lens, max_num_blocks_per_seq, alibi_slopes,
block_tables, seq_lens, max_num_blocks_per_seq, alibi_slopes,
q_stride, kv_block_stride, kv_head_stride, kv_scale);
}
......@@ -513,13 +513,13 @@ __global__ void paged_attention_v2_reduce_kernel(
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__ context_lens, // [num_seqs]
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;
const int context_len = context_lens[seq_idx];
const int num_partitions = DIVIDE_ROUND_UP(context_len, PARTITION_SIZE);
const int seq_len = seq_lens[seq_idx];
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;
......@@ -616,7 +616,7 @@ __global__ void paged_attention_v2_reduce_kernel(
num_kv_heads, \
scale, \
block_tables_ptr, \
context_lens_ptr, \
seq_lens_ptr, \
max_num_blocks_per_seq, \
alibi_slopes_ptr, \
q_stride, \
......@@ -639,8 +639,8 @@ void paged_attention_v1_launcher(
int num_kv_heads,
float scale,
torch::Tensor& block_tables,
torch::Tensor& context_lens,
int max_context_len,
torch::Tensor& seq_lens,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
float kv_scale) {
int num_seqs = query.size(0);
......@@ -664,11 +664,11 @@ void paged_attention_v1_launcher(
CACHE_T* key_cache_ptr = reinterpret_cast<CACHE_T*>(key_cache.data_ptr());
CACHE_T* value_cache_ptr = reinterpret_cast<CACHE_T*>(value_cache.data_ptr());
int* block_tables_ptr = block_tables.data_ptr<int>();
int* context_lens_ptr = context_lens.data_ptr<int>();
int* seq_lens_ptr = seq_lens.data_ptr<int>();
constexpr int NUM_WARPS = NUM_THREADS / WARP_SIZE;
int padded_max_context_len = DIVIDE_ROUND_UP(max_context_len, BLOCK_SIZE) * BLOCK_SIZE;
int logits_size = padded_max_context_len * sizeof(float);
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
// Keep that in sync with the logic here!
......@@ -715,8 +715,8 @@ void paged_attention_v1_launcher(
num_kv_heads, \
scale, \
block_tables, \
context_lens, \
max_context_len, \
seq_lens, \
max_seq_len, \
alibi_slopes, \
kv_scale);
......@@ -746,9 +746,9 @@ void paged_attention_v1(
int num_kv_heads, // [num_heads]
float scale,
torch::Tensor& block_tables, // [num_seqs, max_num_blocks_per_seq]
torch::Tensor& context_lens, // [num_seqs]
torch::Tensor& seq_lens, // [num_seqs]
int block_size,
int max_context_len,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype,
float kv_scale) {
......@@ -790,7 +790,7 @@ void paged_attention_v1(
num_kv_heads, \
scale, \
block_tables_ptr, \
context_lens_ptr, \
seq_lens_ptr, \
max_num_blocks_per_seq, \
alibi_slopes_ptr, \
q_stride, \
......@@ -803,7 +803,7 @@ void paged_attention_v1(
exp_sums_ptr, \
max_logits_ptr, \
tmp_out_ptr, \
context_lens_ptr, \
seq_lens_ptr, \
max_num_partitions);
template<
......@@ -824,8 +824,8 @@ void paged_attention_v2_launcher(
int num_kv_heads,
float scale,
torch::Tensor& block_tables,
torch::Tensor& context_lens,
int max_context_len,
torch::Tensor& seq_lens,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
float kv_scale) {
int num_seqs = query.size(0);
......@@ -852,10 +852,10 @@ void paged_attention_v2_launcher(
CACHE_T* key_cache_ptr = reinterpret_cast<CACHE_T*>(key_cache.data_ptr());
CACHE_T* value_cache_ptr = reinterpret_cast<CACHE_T*>(value_cache.data_ptr());
int* block_tables_ptr = block_tables.data_ptr<int>();
int* context_lens_ptr = context_lens.data_ptr<int>();
int* seq_lens_ptr = seq_lens.data_ptr<int>();
constexpr int NUM_WARPS = NUM_THREADS / WARP_SIZE;
int max_num_partitions = DIVIDE_ROUND_UP(max_context_len, PARTITION_SIZE);
int max_num_partitions = DIVIDE_ROUND_UP(max_seq_len, PARTITION_SIZE);
int logits_size = PARTITION_SIZE * sizeof(float);
int outputs_size = (NUM_WARPS / 2) * head_size * sizeof(float);
......@@ -909,8 +909,8 @@ void paged_attention_v2_launcher(
num_kv_heads, \
scale, \
block_tables, \
context_lens, \
max_context_len, \
seq_lens, \
max_seq_len, \
alibi_slopes, \
kv_scale);
......@@ -943,9 +943,9 @@ void paged_attention_v2(
int num_kv_heads, // [num_heads]
float scale,
torch::Tensor& block_tables, // [num_seqs, max_num_blocks_per_seq]
torch::Tensor& context_lens, // [num_seqs]
torch::Tensor& seq_lens, // [num_seqs]
int block_size,
int max_context_len,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype,
float kv_scale) {
......
csrc/cache.h
View file @ 1591c68f
......@@ -24,6 +24,14 @@ void reshape_and_cache(
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);
// Just for unittest
void convert_fp8(
torch::Tensor& src_cache,
......
csrc/cache_kernels.cu
View file @ 1591c68f
......@@ -215,6 +215,41 @@ __global__ void reshape_and_cache_kernel(
}
}
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 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
if (slot_idx < 0) {
return;
}
const int64_t block_idx = slot_idx / block_size;
const int64_t block_offset = slot_idx % block_size;
const int n = num_heads * head_size;
for (int i = threadIdx.x; i < n; i += blockDim.x) {
const int64_t src_key_idx = token_idx * key_stride + i;
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;
k_cache[tgt_value_idx] = key[src_key_idx];
v_cache[tgt_value_idx] = value[src_value_idx];
}
}
} // namespace vllm
#define CALL_RESHAPE_AND_CACHE(KV_T, CACHE_T, IS_FP8_KV_CACHE) \
......@@ -275,6 +310,51 @@ void 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)
{
// 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);
}
int num_tokens = key.size(0);
int num_heads = key.size(1);
int head_size = key.size(2);
int block_size = k_cache.size(1);
int key_stride = key.stride(0);
int value_stride = value.stride(0);
int block_stride = k_cache.stride(0);
TORCH_CHECK(k_cache.stride(0) == v_cache.stride(0));
dim3 grid(num_tokens);
dim3 block(std::min(num_heads * head_size, 512));
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);
});
}
namespace vllm {
template<typename Tout, typename Tin>
......
csrc/cpu/attention.cpp
View file @ 1591c68f
......@@ -70,11 +70,11 @@ 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 context_len) {
data[0] += alibi_slope * (start_index - context_len + 1);
const int seq_len) {
data[0] += alibi_slope * (start_index - seq_len + 1);
T max = data[0];
for (int i = 1; i < size; ++i) {
T qk = data[i] + alibi_slope * (start_index + i - context_len + 1);
T qk = data[i] + alibi_slope * (start_index + i - seq_len + 1);
data[i] = qk;
max = max >= qk ? max : qk;
}
......@@ -225,7 +225,7 @@ struct paged_attention_v1_impl {
const int num_kv_heads, const float scale,
const int
*__restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int *__restrict__ context_lens, // [num_seqs]
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,
......@@ -235,32 +235,32 @@ struct paged_attention_v1_impl {
static_assert(BLOCK_SIZE == 16);
int max_context_len = max_num_blocks_per_seq * BLOCK_SIZE;
int max_context_len_padded = (max_context_len + 15) & 0xFFFFFFF0;
TORCH_CHECK((max_context_len_padded * sizeof(float)) % 64 == 0);
int max_seq_len = max_num_blocks_per_seq * BLOCK_SIZE;
int max_seq_len_padded = (max_seq_len + 15) & 0xFFFFFFF0;
TORCH_CHECK((max_seq_len_padded * sizeof(float)) % 64 == 0);
const int parallel_work_item_num = omp_get_max_threads();
size_t logits_bytes =
parallel_work_item_num * max_context_len_padded * sizeof(float);
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_context_len_padded]
// [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 context_len = context_lens[seq_idx];
int seq_len = seq_lens[seq_idx];
const int *seq_block_table =
block_tables + max_num_blocks_per_seq * seq_idx;
const int block_num = (context_len + BLOCK_SIZE - 1) / BLOCK_SIZE;
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 =
q + seq_idx * q_stride + head_idx * HEAD_SIZE;
const int last_block_token_num =
context_len - (block_num - 1) * BLOCK_SIZE;
seq_len - (block_num - 1) * BLOCK_SIZE;
float *__restrict__ thread_block_logits =
logits + omp_get_thread_num() * max_context_len_padded;
logits + omp_get_thread_num() * max_seq_len_padded;
// Compute logits
for (int block_idx = 0; block_idx < block_num; ++block_idx) {
......@@ -278,11 +278,11 @@ struct paged_attention_v1_impl {
// Compute softmax
if (alibi_slopes) {
reduceSoftmaxAlibi(thread_block_logits, context_len,
reduceSoftmaxAlibi(thread_block_logits, seq_len,
block_num * BLOCK_SIZE, alibi_slopes[head_idx], 0,
context_len);
seq_len);
} else {
reduceSoftmax(thread_block_logits, context_len,
reduceSoftmax(thread_block_logits, seq_len,
block_num * BLOCK_SIZE);
}
......@@ -340,7 +340,7 @@ 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, context_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);
......@@ -348,8 +348,8 @@ 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 &context_lens,
int max_context_len, const c10::optional<torch::Tensor> &alibi_slopes) {
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);
......@@ -369,7 +369,7 @@ void paged_attention_v1_impl_launcher(
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 *context_lens_ptr = context_lens.data_ptr<int>();
int *seq_lens_ptr = seq_lens.data_ptr<int>();
switch (head_size) {
case 64:
......@@ -399,7 +399,7 @@ void paged_attention_v1_impl_launcher(
#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, \
context_lens, max_context_len, alibi_slopes);
seq_lens, max_seq_len, alibi_slopes);
#define CALL_V1_KERNEL_LAUNCHER_BLOCK_SIZE(T) \
switch (block_size) { \
......@@ -416,8 +416,8 @@ 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 &context_lens, int block_size,
int max_context_len,
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);
......@@ -448,7 +448,7 @@ struct paged_attention_v2_impl {
const int num_kv_heads, const float scale,
const int
*__restrict__ block_tables, // [num_seqs, max_num_blocks_per_seq]
const int *__restrict__ context_lens, // [num_seqs]
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,
......@@ -465,22 +465,22 @@ struct paged_attention_v2_impl {
for (int partition_idx = 0; partition_idx < max_num_partitions;
++partition_idx) {
for (int head_idx = 0; head_idx < num_heads; ++head_idx) {
const int context_len = context_lens[seq_idx];
const int seq_len = seq_lens[seq_idx];
const int start_token_idx = partition_idx * PARTITION_SIZE;
if (start_token_idx >= context_len)
if (start_token_idx >= seq_len)
continue;
const int partition_num =
(context_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
(seq_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
const bool no_reduce = (partition_num == 1);
const int context_token_num =
(std::min(context_len, start_token_idx + PARTITION_SIZE) -
const int token_num =
(std::min(seq_len, start_token_idx + PARTITION_SIZE) -
start_token_idx);
const int block_num =
(context_token_num + BLOCK_SIZE - 1) / BLOCK_SIZE;
(token_num + BLOCK_SIZE - 1) / BLOCK_SIZE;
const int last_block_token_num =
context_token_num - (block_num - 1) * BLOCK_SIZE;
token_num - (block_num - 1) * BLOCK_SIZE;
const int *seq_block_table = block_tables +
max_num_blocks_per_seq * seq_idx +
start_token_idx / BLOCK_SIZE;
......@@ -507,10 +507,10 @@ struct paged_attention_v2_impl {
std::pair<float, float> max_and_sum;
if (alibi_slopes) {
max_and_sum = reduceSoftmaxAlibi(
logits, context_token_num, block_num * BLOCK_SIZE,
alibi_slopes[head_idx], start_token_idx, context_len);
logits, token_num, block_num * BLOCK_SIZE,
alibi_slopes[head_idx], start_token_idx, seq_len);
} else {
max_and_sum = reduceSoftmax(logits, context_token_num,
max_and_sum = reduceSoftmax(logits, token_num,
block_num * BLOCK_SIZE);
}
......@@ -583,9 +583,9 @@ struct paged_attention_v2_impl {
#pragma omp parallel for collapse(2) 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) {
const int context_len = context_lens[seq_idx];
const int seq_len = seq_lens[seq_idx];
const int partition_num =
(context_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
(seq_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
if (partition_num == 1)
continue;
......@@ -612,9 +612,9 @@ struct paged_attention_v2_impl {
for (int seq_idx = 0; seq_idx < num_seqs; ++seq_idx) {
for (int head_idx = 0; head_idx < num_heads; ++head_idx) {
for (int group_idx = 0; group_idx < head_group_num; ++group_idx) {
const int context_len = context_lens[seq_idx];
const int seq_len = seq_lens[seq_idx];
const int partition_num =
(context_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
(seq_len + PARTITION_SIZE - 1) / PARTITION_SIZE;
if (partition_num == 1)
continue;
......@@ -649,7 +649,7 @@ struct paged_attention_v2_impl {
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, \
context_lens_ptr, max_num_blocks_per_seq, alibi_slopes_ptr, q_stride, \
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);
......@@ -658,8 +658,8 @@ 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 &context_lens, int block_size,
int max_context_len, const c10::optional<torch::Tensor> &alibi_slopes) {
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);
......@@ -683,7 +683,7 @@ void paged_attention_v2_impl_launcher(
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 *context_lens_ptr = context_lens.data_ptr<int>();
int *seq_lens_ptr = seq_lens.data_ptr<int>();
switch (head_size) {
case 64:
......@@ -713,8 +713,8 @@ void paged_attention_v2_impl_launcher(
#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, context_lens, block_size, \
max_context_len, alibi_slopes);
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) { \
......@@ -732,8 +732,8 @@ void paged_attention_v2(torch::Tensor &out, torch::Tensor &exp_sums,
torch::Tensor &query, torch::Tensor &key_cache,
torch::Tensor &value_cache, int num_kv_heads,
float scale, torch::Tensor &block_tables,
torch::Tensor &context_lens, int block_size,
int max_context_len,
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);
......
csrc/ops.h
View file @ 1591c68f
......@@ -10,9 +10,9 @@ void paged_attention_v1(
int num_kv_heads,
float scale,
torch::Tensor& block_tables,
torch::Tensor& context_lens,
torch::Tensor& seq_lens,
int block_size,
int max_context_len,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype,
float kv_scale);
......@@ -28,9 +28,9 @@ void paged_attention_v2(
int num_kv_heads,
float scale,
torch::Tensor& block_tables,
torch::Tensor& context_lens,
torch::Tensor& seq_lens,
int block_size,
int max_context_len,
int max_seq_len,
const c10::optional<torch::Tensor>& alibi_slopes,
const std::string& kv_cache_dtype,
float kv_scale);
......@@ -124,6 +124,26 @@ torch::Tensor marlin_gemm(
int64_t size_m,
int64_t size_n,
int64_t size_k);
torch::Tensor gptq_marlin_gemm(
torch::Tensor &a,
torch::Tensor &b_q_weight,
torch::Tensor &b_scales,
torch::Tensor &g_idx,
torch::Tensor &perm,
torch::Tensor &workspace,
int64_t num_bits,
int64_t size_m,
int64_t size_n,
int64_t size_k,
bool is_k_full);
torch::Tensor gptq_marlin_repack(
torch::Tensor &b_q_weight,
torch::Tensor &perm,
int64_t size_k,
int64_t size_n,
int64_t num_bits);
#endif
void squeezellm_gemm(
......@@ -146,7 +166,12 @@ void gptq_shuffle(
torch::Tensor q_perm,
int bit);
void scaled_fp8_quant(
void static_scaled_fp8_quant(
torch::Tensor& out,
torch::Tensor& input,
torch::Tensor& scale);
void dynamic_scaled_fp8_quant(
torch::Tensor& out,
torch::Tensor& input,
torch::Tensor& scale);
......
csrc/punica/bgmv/bgmv_bf16_bf16_bf16.cu
View file @ 1591c68f
......@@ -2,3 +2,4 @@
#include "bgmv_impl.cuh"
FOR_BGMV_WIDE_NARROW(INST_BGMV_TWOSIDE, nv_bfloat16, nv_bfloat16, nv_bfloat16)
FOR_INST_BGMV_WIDE_NARROW(INST_BGMV_ONESIDE, nv_bfloat16, nv_bfloat16, nv_bfloat16)
csrc/punica/bgmv/bgmv_bf16_fp32_bf16.cu
View file @ 1591c68f
......@@ -2,3 +2,4 @@
#include "bgmv_impl.cuh"
FOR_BGMV_WIDE_NARROW(INST_BGMV_TWOSIDE, nv_bfloat16, float, nv_bfloat16)
FOR_INST_BGMV_WIDE_NARROW(INST_BGMV_ONESIDE, nv_bfloat16, float, nv_bfloat16)
csrc/punica/bgmv/bgmv_config.h
View file @ 1591c68f
......@@ -74,6 +74,74 @@ void bgmv_kernel(out_T *__restrict__ Y, const in_T *__restrict__ X,
// Keep above in sync with vllm/lora/layers::LogitsProcessorWithLoRA
// and vllm/tests/lora/test_punica.py
// Used for defining kernels going from the variety of
// dim in to the narrow dim out
// Using it for the fully sharded column
// parallel LoRA A which splits the rank dim
#define FOR_INST_BGMV_NARROW(f, in_T, out_T, W_T, narrow) \
f(in_T, out_T, W_T, 128, narrow) \
f(in_T, out_T, W_T, 256, narrow) \
f(in_T, out_T, W_T, 512, narrow) \
f(in_T, out_T, W_T, 640, narrow) \
f(in_T, out_T, W_T, 768, narrow) \
f(in_T, out_T, W_T, 1024, narrow) \
f(in_T, out_T, W_T, 1152, narrow) \
f(in_T, out_T, W_T, 1280, narrow) \
f(in_T, out_T, W_T, 1536, narrow) \
f(in_T, out_T, W_T, 1728, narrow) \
f(in_T, out_T, W_T, 1792, narrow) \
f(in_T, out_T, W_T, 2048, narrow) \
f(in_T, out_T, W_T, 2304, narrow) \
f(in_T, out_T, W_T, 2560, narrow) \
f(in_T, out_T, W_T, 2752, narrow) \
f(in_T, out_T, W_T, 2816, narrow) \
f(in_T, out_T, W_T, 3072, narrow) \
f(in_T, out_T, W_T, 3456, narrow) \
f(in_T, out_T, W_T, 3584, narrow) \
f(in_T, out_T, W_T, 4096, narrow) \
f(in_T, out_T, W_T, 4608, narrow) \
f(in_T, out_T, W_T, 5120, narrow) \
f(in_T, out_T, W_T, 5504, narrow) \
f(in_T, out_T, W_T, 5632, narrow) \
f(in_T, out_T, W_T, 6144, narrow) \
f(in_T, out_T, W_T, 6848, narrow) \
f(in_T, out_T, W_T, 6912, narrow) \
f(in_T, out_T, W_T, 7168, narrow) \
f(in_T, out_T, W_T, 8192, narrow) \
f(in_T, out_T, W_T, 9216, narrow) \
f(in_T, out_T, W_T, 10240, narrow) \
f(in_T, out_T, W_T, 11008, narrow) \
f(in_T, out_T, W_T, 12288, narrow) \
f(in_T, out_T, W_T, 13696, narrow) \
f(in_T, out_T, W_T, 13824, narrow) \
f(in_T, out_T, W_T, 14336, narrow) \
f(in_T, out_T, W_T, 15360, narrow) \
f(in_T, out_T, W_T, 16384, narrow) \
f(in_T, out_T, W_T, 20480, narrow) \
f(in_T, out_T, W_T, 22016, narrow) \
f(in_T, out_T, W_T, 24576, narrow) \
f(in_T, out_T, W_T, 27392, narrow) \
f(in_T, out_T, W_T, 28672, narrow) \
f(in_T, out_T, W_T, 32000, narrow) \
f(in_T, out_T, W_T, 32256, narrow) \
f(in_T, out_T, W_T, 32512, narrow) \
f(in_T, out_T, W_T, 32768, narrow) \
f(in_T, out_T, W_T, 33024, narrow) \
f(in_T, out_T, W_T, 36864, narrow) \
f(in_T, out_T, W_T, 43264, narrow) \
f(in_T, out_T, W_T, 49152, narrow) \
f(in_T, out_T, W_T, 64000, narrow) \
f(in_T, out_T, W_T, 64256, narrow) \
f(in_T, out_T, W_T, 64512, narrow) \
f(in_T, out_T, W_T, 102400, narrow) \
f(in_T, out_T, W_T, 102656, narrow) \
f(in_T, out_T, W_T, 102912, narrow) \
f(in_T, out_T, W_T, 128000, narrow) \
f(in_T, out_T, W_T, 128256, narrow) \
f(in_T, out_T, W_T, 128512, narrow) \
// Keep above in sync with vllm/lora/layers::SamplerWithLoRA
// Keep this in sync with vllm/config::LoRAConfig
#define FOR_BGMV_WIDE_NARROW(f, in_T, out_T, W_T) \
FOR_BGMV_WIDE(f, in_T, out_T, W_T, 8) \
......@@ -81,4 +149,14 @@ void bgmv_kernel(out_T *__restrict__ Y, const in_T *__restrict__ X,
FOR_BGMV_WIDE(f, in_T, out_T, W_T, 32) \
FOR_BGMV_WIDE(f, in_T, out_T, W_T, 64)
#define FOR_INST_BGMV_WIDE_NARROW(f, in_T, out_T, W_T) \
FOR_INST_BGMV_NARROW(f, in_T, out_T, W_T, 1) \
FOR_INST_BGMV_NARROW(f, in_T, out_T, W_T, 2) \
FOR_INST_BGMV_NARROW(f, in_T, out_T, W_T, 4) \
f(in_T, out_T, W_T, 8, 64) \
f(in_T, out_T, W_T, 16, 64) \
f(in_T, out_T, W_T, 32, 64) \
f(in_T, out_T, W_T, 64, 64)
// clang-format on
csrc/punica/bgmv/bgmv_fp16_fp16_fp16.cu
View file @ 1591c68f
......@@ -2,3 +2,4 @@
#include "bgmv_impl.cuh"
FOR_BGMV_WIDE_NARROW(INST_BGMV_TWOSIDE, nv_half, nv_half, nv_half)
FOR_INST_BGMV_WIDE_NARROW(INST_BGMV_ONESIDE, nv_half, nv_half, nv_half)
csrc/punica/bgmv/bgmv_fp16_fp32_fp16.cu
View file @ 1591c68f
......@@ -2,3 +2,4 @@
#include "bgmv_impl.cuh"
FOR_BGMV_WIDE_NARROW(INST_BGMV_TWOSIDE, nv_half, float, nv_half)
FOR_INST_BGMV_WIDE_NARROW(INST_BGMV_ONESIDE, nv_half, float, nv_half)
csrc/punica/bgmv/bgmv_fp32_bf16_bf16.cu
View file @ 1591c68f
......@@ -2,3 +2,4 @@
#include "bgmv_impl.cuh"
FOR_BGMV_WIDE_NARROW(INST_BGMV_TWOSIDE, float, nv_bfloat16, nv_bfloat16)
FOR_INST_BGMV_WIDE_NARROW(INST_BGMV_ONESIDE, float, nv_bfloat16, nv_bfloat16)
csrc/punica/bgmv/bgmv_fp32_fp16_fp16.cu
View file @ 1591c68f
......@@ -2,3 +2,4 @@
#include "bgmv_impl.cuh"
FOR_BGMV_WIDE_NARROW(INST_BGMV_TWOSIDE, float, nv_half, nv_half)
FOR_INST_BGMV_WIDE_NARROW(INST_BGMV_ONESIDE, float, nv_half, nv_half)
csrc/punica/bgmv/bgmv_impl.cuh
View file @ 1591c68f
......@@ -199,7 +199,7 @@ void bgmv_kernel(out_T *__restrict__ Y, const in_T *__restrict__ X,
constexpr int tz = 4;
const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
if constexpr (feat_in < feat_out) {
if constexpr (feat_in <= feat_out) {
static_assert(feat_in % vec_size == 0);
constexpr int tx = feat_in / vec_size;
......@@ -289,6 +289,9 @@ void bgmv_kernel(out_T *__restrict__ Y, const in_T *__restrict__ X,
int64_t y_offset, int64_t full_y_size, int64_t batch_size, \
int64_t num_layers, int64_t layer_idx, float scale);
#define INST_BGMV_ONESIDE(in_T, out_T, W_T, feat_in, feat_out) \
INST_BGMV(feat_in, feat_out, in_T, out_T, W_T)
#define INST_BGMV_TWOSIDE(in_T, out_T, W_T, narrow, wide) \
INST_BGMV(narrow, wide, in_T, out_T, W_T) \
INST_BGMV(wide, narrow, in_T, out_T, W_T)
csrc/punica/bgmv/generator.py
View file @ 1591c68f
......@@ -10,6 +10,7 @@ TEMPLATE = """
#include "bgmv_impl.cuh"
FOR_BGMV_WIDE_NARROW(INST_BGMV_TWOSIDE, {input_dtype}, {output_dtype}, {weight_dtype})
FOR_INST_BGMV_WIDE_NARROW(INST_BGMV_ONESIDE, {input_dtype}, {output_dtype}, {weight_dtype})
""".lstrip() # noqa: E501
for input_dtype in DTYPES:
......
csrc/punica/punica_ops.cc
View file @ 1591c68f
......@@ -79,12 +79,12 @@ inline bool launch_bgmv_kernel(out_T *Y, const in_T *X, const W_T *W,
CASE_ONESIDE(in_T, out_T, W_T, wide, narrow)
FOR_BGMV_WIDE_NARROW(CASE, _, _, _)
FOR_INST_BGMV_WIDE_NARROW(CASE_ONESIDE, _, _, _)
#undef CASE
#undef CASE_ONESIDE
default:
return false;
}
return true;
}
......
csrc/pybind.cpp
View file @ 1591c68f
......@@ -67,13 +67,16 @@ PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
ops.def("aqlm_dequant", &aqlm_dequant, "Decompression method for AQLM");
ops.def("awq_gemm", &awq_gemm, "Quantized GEMM for AWQ");
ops.def("marlin_gemm", &marlin_gemm, "Marlin Optimized Quantized GEMM for GPTQ");
ops.def("gptq_marlin_gemm", &gptq_marlin_gemm, "gptq_marlin Optimized Quantized GEMM for GPTQ");
ops.def("gptq_marlin_repack", &gptq_marlin_repack, "gptq_marlin repack from GPTQ");
ops.def("awq_dequantize", &awq_dequantize, "Dequantization for AWQ");
#endif
ops.def("gptq_gemm", &gptq_gemm, "Quantized GEMM for GPTQ");
ops.def("gptq_shuffle", &gptq_shuffle, "Post processing for GPTQ");
ops.def("squeezellm_gemm", &squeezellm_gemm, "Quantized GEMM for SqueezeLLM");
ops.def("scaled_fp8_quant", &scaled_fp8_quant, "Compute FP8 quantized tensor and scaling factor");
ops.def("static_scaled_fp8_quant", &static_scaled_fp8_quant, "Compute FP8 quantized tensor for given scaling factor");
ops.def("dynamic_scaled_fp8_quant", &dynamic_scaled_fp8_quant, "Compute FP8 quantized tensor and scaling factor");
ops.def(
"moe_align_block_size",
&moe_align_block_size,
......@@ -93,6 +96,10 @@ PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
"reshape_and_cache",
&reshape_and_cache,
"Reshape the key and value tensors and cache them");
cache_ops.def(
"reshape_and_cache_flash",
&reshape_and_cache_flash,
"Reshape the key and value tensors and cache them");
cache_ops.def(
"convert_fp8",
&convert_fp8,
......
csrc/quantization/fp8/fp8_cuda_kernels.cu
View file @ 1591c68f
......@@ -74,7 +74,30 @@ __global__ void scaled_fp8_quant_kernel(
} // namespace vllm
void scaled_fp8_quant(
void static_scaled_fp8_quant(
torch::Tensor& out, // [..., d]
torch::Tensor& input, // [..., d]
torch::Tensor& scale) // [1]
{
int64_t num_tokens = input.numel() / input.size(-1);
int64_t num_elems = input.numel();
dim3 grid(num_tokens);
dim3 block(1024);
const at::cuda::OptionalCUDAGuard device_guard(device_of(input));
const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
VLLM_DISPATCH_FLOATING_TYPES(
input.scalar_type(),
"scaled_fp8_quant_kernel",
[&] {
vllm::scaled_fp8_quant_kernel<scalar_t><<<grid, block, 0, stream>>>(
out.data_ptr<c10::Float8_e4m3fn>(),
input.data_ptr<scalar_t>(),
scale.data_ptr<float>(),
num_elems);
});
}
void dynamic_scaled_fp8_quant(
torch::Tensor& out, // [..., d]
torch::Tensor& input, // [..., d]
torch::Tensor& scale) // [1]
......
csrc/quantization/gptq_marlin/gptq_marlin.cu 0 → 100644
View file @ 1591c68f
/*
* Modified by Neural Magic
* Copyright (C) Marlin.2024 Elias Frantar
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Adapted from https://github.com/IST-DASLab/marlin
*/
#include "gptq_marlin.cuh"
template <typename T> inline std::string str(T x) { return std::to_string(x); }
namespace gptq_marlin {
#if defined(__CUDA_ARCH__) && __CUDA_ARCH__ < 800
__global__ void permute_cols_kernel(int4 const *__restrict__ a_int4_ptr,
int const *__restrict__ perm_int_ptr,
int4 *__restrict__ out_int4_ptr, int size_m,
int size_k, int block_rows) {}
template <const int num_bits, // number of bits used for weights
const int threads, // number of threads in a threadblock
const int thread_m_blocks, // number of 16x16 blocks in the m
// dimension (batchsize) of the threadblock
const int thread_n_blocks, // same for n dimension (output)
const int thread_k_blocks, // same for k dimension (reduction)
const int stages, // number of stages for the async global->shared
// fetch pipeline
const bool has_act_order, // whether act_order is enabled
const int group_blocks = -1 // number of consecutive 16x16 blocks with
// a separate quantization scale
>
__global__ void
Marlin(const int4 *__restrict__ A, // fp16 input matrix of shape mxk
const int4 *__restrict__ B, // 4bit quantized weight matrix of shape kxn
int4 *__restrict__ C, // fp16 output buffer of shape mxn
const int4 *__restrict__ scales_ptr, // fp16 quantization scales of shape
// (k/groupsize)xn
const int *__restrict__ g_idx, // int32 group indices of shape k
int num_groups, // number of scale groups per output channel
int prob_m, // batch dimension m
int prob_n, // output dimension n
int prob_k, // reduction dimension k
int *locks // extra global storage for barrier synchronization
) {}
} // namespace gptq_marlin
torch::Tensor gptq_marlin_gemm(torch::Tensor &a, torch::Tensor &b_q_weight,
torch::Tensor &b_scales, torch::Tensor &g_idx,
torch::Tensor &perm, torch::Tensor &workspace,
int64_t num_bits, int64_t size_m, int64_t size_n,
int64_t size_k, bool is_k_full) {
TORCH_CHECK_NOT_IMPLEMENTED(false,
"marlin_gemm(..) requires CUDA_ARCH >= 8.0");
return torch::empty({1, 1});
}
#else
// Matrix fragments for tensor core instructions; their precise layout is
// documented here:
// https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#matrix-fragments-for-mma-m16n8k16-with-floating-point-type
using FragA = Vec<half2, 4>;
using FragB = Vec<half2, 2>;
using FragC = Vec<float, 4>;
using FragS = Vec<half2, 1>; // quantization scales
// m16n8k16 tensor core mma instruction with fp16 inputs and fp32
// output/accumulation.
__device__ inline void mma(const FragA &a_frag, const FragB &frag_b,
FragC &frag_c) {
const uint32_t *a = reinterpret_cast<const uint32_t *>(&a_frag);
const uint32_t *b = reinterpret_cast<const uint32_t *>(&frag_b);
float *c = reinterpret_cast<float *>(&frag_c);
asm volatile("mma.sync.aligned.m16n8k16.row.col.f32.f16.f16.f32 "
"{%0,%1,%2,%3}, {%4,%5,%6,%7}, {%8,%9}, {%10,%11,%12,%13};\n"
: "=f"(c[0]), "=f"(c[1]), "=f"(c[2]), "=f"(c[3])
: "r"(a[0]), "r"(a[1]), "r"(a[2]), "r"(a[3]), "r"(b[0]),
"r"(b[1]), "f"(c[0]), "f"(c[1]), "f"(c[2]), "f"(c[3]));
}
// Instruction for loading a full 16x16 matrix fragment of operand A from shared
// memory, directly in tensor core layout.
__device__ inline void ldsm4(FragA &frag_a, const void *smem_ptr) {
uint32_t *a = reinterpret_cast<uint32_t *>(&frag_a);
uint32_t smem = static_cast<uint32_t>(__cvta_generic_to_shared(smem_ptr));
asm volatile("ldmatrix.sync.aligned.m8n8.x4.shared.b16 {%0,%1,%2,%3}, [%4];\n"
: "=r"(a[0]), "=r"(a[1]), "=r"(a[2]), "=r"(a[3])
: "r"(smem));
}
// Lookup-table based 3-input logical operation; explicitly used for
// dequantization as the compiler does not seem to automatically recognize it in
// all cases.
template <int lut> __device__ inline int lop3(int a, int b, int c) {
int res;
asm volatile("lop3.b32 %0, %1, %2, %3, %4;\n"
: "=r"(res)
: "r"(a), "r"(b), "r"(c), "n"(lut));
return res;
}
// Constructs destination register by taking bytes from 2 sources (based on mask)
template <int start_byte, int mask>
__device__ inline uint32_t prmt(uint32_t a) {
uint32_t res;
asm volatile("prmt.b32 %0, %1, %2, %3;\n"
: "=r"(res)
: "r"(a), "n"(start_byte), "n"(mask));
return res;
}
// Efficiently dequantize an int32 value into a full B-fragment of 4 fp16
// values. We mostly follow the strategy in the link below, with some small
// changes:
// https://github.com/NVIDIA/FasterTransformer/blob/main/src/fastertransformer/cutlass_extensions/include/cutlass_extensions/interleaved_numeric_conversion.h
__device__ inline FragB dequant_4bit(int q) {
const int LO = 0x000f000f;
const int HI = 0x00f000f0;
const int EX = 0x64006400;
// Guarantee that the `(a & b) | c` operations are LOP3s.
int lo = lop3<(0xf0 & 0xcc) | 0xaa>(q, LO, EX);
int hi = lop3<(0xf0 & 0xcc) | 0xaa>(q, HI, EX);
// We want signed int4 outputs, hence we fuse the `-8` symmetric zero point
// directly into `SUB` and `ADD`.
const int SUB = 0x64086408;
const int MUL = 0x2c002c00;
const int ADD = 0xd480d480;
FragB frag_b;
frag_b[0] = __hsub2(*reinterpret_cast<half2 *>(&lo),
*reinterpret_cast<const half2 *>(&SUB));
frag_b[1] = __hfma2(*reinterpret_cast<half2 *>(&hi),
*reinterpret_cast<const half2 *>(&MUL),
*reinterpret_cast<const half2 *>(&ADD));
return frag_b;
}
__device__ inline FragB dequant_8bit(int q) {
static constexpr uint32_t mask_for_elt_01 = 0x5250;
static constexpr uint32_t mask_for_elt_23 = 0x5351;
static constexpr uint32_t start_byte_for_fp16 = 0x64646464;
uint32_t lo = prmt<start_byte_for_fp16, mask_for_elt_01>(q);
uint32_t hi = prmt<start_byte_for_fp16, mask_for_elt_23>(q);
static constexpr uint32_t I8s_TO_F16s_MAGIC_NUM = 0x64806480;
FragB frag_b;
frag_b[0] = __hsub2(*reinterpret_cast<half2 *>(&lo),
*reinterpret_cast<const half2 *>(&I8s_TO_F16s_MAGIC_NUM));
frag_b[1] = __hsub2(*reinterpret_cast<half2 *>(&hi),
*reinterpret_cast<const half2 *>(&I8s_TO_F16s_MAGIC_NUM));
return frag_b;
}
// Multiply dequantized values by the corresponding quantization scale; used
// only for grouped quantization.
__device__ inline void scale(FragB &frag_b, FragS &frag_s, int i) {
half2 s = __half2half2(reinterpret_cast<__half *>(&frag_s)[i]);
frag_b[0] = __hmul2(frag_b[0], s);
frag_b[1] = __hmul2(frag_b[1], s);
}
// Same as above, but for act_order (each K is multiplied individually)
__device__ inline void scale4(FragB &frag_b, FragS &frag_s_1, FragS &frag_s_2,
FragS &frag_s_3, FragS &frag_s_4, int i) {
__half2 s_val_1_2;
s_val_1_2.x = reinterpret_cast<__half *>(&frag_s_1)[i];
s_val_1_2.y = reinterpret_cast<__half *>(&frag_s_2)[i];
__half2 s_val_3_4;
s_val_3_4.x = reinterpret_cast<__half *>(&frag_s_3)[i];
s_val_3_4.y = reinterpret_cast<__half *>(&frag_s_4)[i];
frag_b[0] = __hmul2(frag_b[0], s_val_1_2);
frag_b[1] = __hmul2(frag_b[1], s_val_3_4);
}
// Given 2 floats multiply by 2 scales (halves)
__device__ inline void scale_float(float *c, FragS &s) {
__half *s_ptr = reinterpret_cast<__half *>(&s);
c[0] = __fmul_rn(c[0], __half2float(s_ptr[0]));
c[1] = __fmul_rn(c[1], __half2float(s_ptr[1]));
}
// Wait until barrier reaches `count`, then lock for current threadblock.
__device__ inline void barrier_acquire(int *lock, int count) {
if (threadIdx.x == 0) {
int state = -1;
do
// Guarantee that subsequent writes by this threadblock will be visible
// globally.
asm volatile("ld.global.acquire.gpu.b32 %0, [%1];\n"
: "=r"(state)
: "l"(lock));
while (state != count);
}
__syncthreads();
}
// Release barrier and increment visitation count.
__device__ inline void barrier_release(int *lock, bool reset = false) {
__syncthreads();
if (threadIdx.x == 0) {
if (reset) {
lock[0] = 0;
return;
}
int val = 1;
// Make sure that all writes since acquiring this barrier are visible
// globally, while releasing the barrier.
asm volatile("fence.acq_rel.gpu;\n");
asm volatile("red.relaxed.gpu.global.add.s32 [%0], %1;\n"
:
: "l"(lock), "r"(val));
}
}
// For a given "a" of size [M,K] performs a permutation of the K columns based
// on the given "perm" indices.
__global__ void permute_cols_kernel(int4 const *__restrict__ a_int4_ptr,
int const *__restrict__ perm_int_ptr,
int4 *__restrict__ out_int4_ptr, int size_m,
int size_k, int block_rows) {
int start_row = block_rows * blockIdx.x;
int finish_row = start_row + block_rows;
if (finish_row > size_m) {
finish_row = size_m;
}
int cur_block_rows = finish_row - start_row;
int row_stride = size_k * sizeof(half) / 16;
auto permute_row = [&](int row) {
int iters = size_k / default_threads;
int rest = size_k % default_threads;
int offset = row * row_stride;
half const *a_row_half =
reinterpret_cast<half const *>(a_int4_ptr + offset);
half *out_half = reinterpret_cast<half *>(out_int4_ptr + offset);
int base_k = 0;
for (int i = 0; i < iters; i++) {
int cur_k = base_k + threadIdx.x;
int src_pos = perm_int_ptr[cur_k];
out_half[cur_k] = a_row_half[src_pos];
base_k += default_threads;
}
if (rest) {
if (threadIdx.x < rest) {
int cur_k = base_k + threadIdx.x;
int src_pos = perm_int_ptr[cur_k];
out_half[cur_k] = a_row_half[src_pos];
}
}
};
for (int i = 0; i < cur_block_rows; i++) {
int cur_row = start_row + i;
if (cur_row < size_m) {
permute_row(cur_row);
}
}
}
template <const int num_bits, // number of bits used for weights
const int threads, // number of threads in a threadblock
const int thread_m_blocks, // number of 16x16 blocks in the m
// dimension (batchsize) of the threadblock
const int thread_n_blocks, // same for n dimension (output)
const int thread_k_blocks, // same for k dimension (reduction)
const int stages, // number of stages for the async global->shared
// fetch pipeline
const bool has_act_order, // whether act_order is enabled
const int group_blocks = -1 // number of consecutive 16x16 blocks with
// a separate quantization scale
>
__global__ void
Marlin(const int4 *__restrict__ A, // fp16 input matrix of shape mxk
const int4 *__restrict__ B, // 4bit quantized weight matrix of shape kxn
int4 *__restrict__ C, // fp16 output buffer of shape mxn
const int4 *__restrict__ scales_ptr, // fp16 quantization scales of shape
// (k/groupsize)xn
const int *__restrict__ g_idx, // int32 group indices of shape k
int num_groups, // number of scale groups per output channel
int prob_m, // batch dimension m
int prob_n, // output dimension n
int prob_k, // reduction dimension k
int *locks // extra global storage for barrier synchronization
) {
// Each threadblock processes one "stripe" of the B matrix with (roughly) the
// same size, which might involve multiple column "slices" (of width 16 *
// `thread_n_blocks`). Stripes are defined as shown in the 3x3 matrix 5 SM
// example:
// 0 1 3
// 0 2 3
// 1 2 4
// While this kind of partitioning makes things somewhat more complicated, it
// ensures good utilization of all SMs for many kinds of shape and GPU
// configurations, while requiring as few slow global cross-threadblock
// reductions as possible.
constexpr int pack_factor = 32 / num_bits;
// For larger GEMMs we run multiple batchsize 64 versions in parallel for a
// better partitioning with less reductions
int parallel = 1;
if (prob_m > 16 * thread_m_blocks) {
parallel = prob_m / (16 * thread_m_blocks);
prob_m = 16 * thread_m_blocks;
}
int k_tiles = prob_k / 16 / thread_k_blocks;
int n_tiles = prob_n / 16 / thread_n_blocks;
int iters = div_ceil(k_tiles * n_tiles * parallel, gridDim.x);
if constexpr (!has_act_order && group_blocks != -1) {
if (group_blocks >= thread_k_blocks) {
// Ensure that the number of tiles in each stripe is a multiple of the
// groupsize; this avoids an annoying special case where a stripe starts
// in the middle of group.
iters = (group_blocks / thread_k_blocks) *
div_ceil(iters, (group_blocks / thread_k_blocks));
}
}
int slice_row = (iters * blockIdx.x) % k_tiles;
int slice_col_par = (iters * blockIdx.x) / k_tiles;
int slice_col = slice_col_par;
int slice_iters; // number of threadblock tiles in the current slice
int slice_count =
0; // total number of active threadblocks in the current slice
int slice_idx; // index of threadblock in current slice; numbered bottom to
// top
// We can easily implement parallel problem execution by just remapping
// indices and advancing global pointers
if (slice_col_par >= n_tiles) {
A += (slice_col_par / n_tiles) * 16 * thread_m_blocks * prob_k / 8;
C += (slice_col_par / n_tiles) * 16 * thread_m_blocks * prob_n / 8;
locks += (slice_col_par / n_tiles) * n_tiles;
slice_col = slice_col_par % n_tiles;
}
// Compute all information about the current slice which is required for
// synchronization.
auto init_slice = [&]() {
slice_iters =
iters * (blockIdx.x + 1) - (k_tiles * slice_col_par + slice_row);
if (slice_iters < 0 || slice_col_par >= n_tiles * parallel)
slice_iters = 0;
if (slice_iters == 0)
return;
if (slice_row + slice_iters > k_tiles)
slice_iters = k_tiles - slice_row;
slice_count = 1;
slice_idx = 0;
int col_first = iters * div_ceil(k_tiles * slice_col_par, iters);
if (col_first <= k_tiles * (slice_col_par + 1)) {
int col_off = col_first - k_tiles * slice_col_par;
slice_count = div_ceil(k_tiles - col_off, iters);
if (col_off > 0)
slice_count++;
int delta_first = iters * blockIdx.x - col_first;
if (delta_first < 0 || (col_off == 0 && delta_first == 0))
slice_idx = slice_count - 1;
else {
slice_idx = slice_count - 1 - delta_first / iters;
if (col_off > 0)
slice_idx--;
}
}
if (slice_col == n_tiles) {
A += 16 * thread_m_blocks * prob_k / 8;
C += 16 * thread_m_blocks * prob_n / 8;
locks += n_tiles;
slice_col = 0;
}
};
init_slice();
// A sizes/strides
// stride of the A matrix in global memory
int a_gl_stride = prob_k / 8;
// stride of an A matrix tile in shared memory
constexpr int a_sh_stride = 16 * thread_k_blocks / 8;
// delta between subsequent A tiles in global memory
constexpr int a_gl_rd_delta_o = 16 * thread_k_blocks / 8;
// between subsequent accesses within a tile
int a_gl_rd_delta_i = a_gl_stride * (threads / a_gl_rd_delta_o);
// between shared memory writes
constexpr int a_sh_wr_delta = a_sh_stride * (threads / a_gl_rd_delta_o);
// between shared memory tile reads
constexpr int a_sh_rd_delta_o = 2 * ((threads / 32) / (thread_n_blocks / 4));
// within a shared memory tile
constexpr int a_sh_rd_delta_i = a_sh_stride * 16;
// overall size of a tile
constexpr int a_sh_stage = a_sh_stride * (16 * thread_m_blocks);
// number of shared write iterations for a tile
constexpr int a_sh_wr_iters = div_ceil(a_sh_stage, a_sh_wr_delta);
// B sizes/strides
int b_gl_stride = 16 * prob_n / (pack_factor * 4);
constexpr int b_sh_stride = ((thread_n_blocks * 16) * 16 / pack_factor) / 4;
constexpr int b_thread_vecs = num_bits == 4 ? 1 : 2;
constexpr int b_sh_stride_threads = b_sh_stride / b_thread_vecs;
int b_gl_rd_delta_o = b_gl_stride * thread_k_blocks;
int b_gl_rd_delta_i = b_gl_stride * (threads / b_sh_stride_threads);
constexpr int b_sh_wr_delta = threads * b_thread_vecs;
constexpr int b_sh_rd_delta = threads * b_thread_vecs;
constexpr int b_sh_stage = b_sh_stride * thread_k_blocks;
constexpr int b_sh_wr_iters = b_sh_stage / b_sh_wr_delta;
// Scale sizes/strides without act_order
int s_gl_stride = prob_n / 8;
constexpr int s_sh_stride = 16 * thread_n_blocks / 8;
constexpr int s_tb_groups =
!has_act_order && group_blocks != -1 && group_blocks < thread_k_blocks
? thread_k_blocks / group_blocks
: 1;
constexpr int s_sh_stage = s_tb_groups * s_sh_stride;
int s_gl_rd_delta = s_gl_stride;
// Scale size/strides with act_order
constexpr int tb_k = 16 * thread_k_blocks;
constexpr int g_idx_stage = has_act_order ? (tb_k * sizeof(int)) / 16 : 0;
// constexpr int act_s_row_stride = 1;
// int act_s_col_stride = act_s_row_stride * num_groups;
int act_s_col_stride = 1;
int act_s_col_warp_stride = act_s_col_stride * 8;
int tb_n_warps = thread_n_blocks / 4;
int act_s_col_tb_stride = act_s_col_warp_stride * tb_n_warps;
// Global A read index of current thread.
int a_gl_rd = a_gl_stride * (threadIdx.x / a_gl_rd_delta_o) +
(threadIdx.x % a_gl_rd_delta_o);
a_gl_rd += a_gl_rd_delta_o * slice_row;
// Shared write index of current thread.
int a_sh_wr = a_sh_stride * (threadIdx.x / a_gl_rd_delta_o) +
(threadIdx.x % a_gl_rd_delta_o);
// Shared read index.
int a_sh_rd =
a_sh_stride * ((threadIdx.x % 32) % 16) + (threadIdx.x % 32) / 16;
a_sh_rd += 2 * ((threadIdx.x / 32) / (thread_n_blocks / 4));
int b_gl_rd = b_gl_stride * (threadIdx.x / b_sh_stride_threads) +
(threadIdx.x % b_sh_stride_threads) * b_thread_vecs;
b_gl_rd += b_sh_stride * slice_col;
b_gl_rd += b_gl_rd_delta_o * slice_row;
int b_sh_wr = threadIdx.x * b_thread_vecs;
int b_sh_rd = threadIdx.x * b_thread_vecs;
// For act_order
constexpr int k_iter_size = tb_k / b_sh_wr_iters;
int slice_k_start = tb_k * slice_row;
int slice_k_finish = slice_k_start + tb_k * slice_iters;
int slice_k_start_shared_fetch = slice_k_start;
int slice_n_offset = act_s_col_tb_stride * slice_col;
// No act_order
int s_gl_rd;
if constexpr (!has_act_order) {
if constexpr (group_blocks == -1) {
s_gl_rd = s_sh_stride * slice_col + threadIdx.x;
} else {
s_gl_rd = s_gl_stride * ((thread_k_blocks * slice_row) / group_blocks) +
s_sh_stride * slice_col + threadIdx.x;
}
}
int s_sh_wr = threadIdx.x;
bool s_sh_wr_pred = threadIdx.x < s_sh_stride;
// We use a different scale layout for grouped and column-wise quantization as
// we scale a `half2` tile in column-major layout in the former and in
// row-major in the latter case.
int s_sh_rd;
if constexpr (group_blocks != -1)
s_sh_rd = 8 * ((threadIdx.x / 32) % (thread_n_blocks / 4)) +
(threadIdx.x % 32) / 4;
else
s_sh_rd = 8 * ((threadIdx.x / 32) % (thread_n_blocks / 4)) +
(threadIdx.x % 32) % 4;
// Precompute which thread should not read memory in which iterations; this is
// needed if there are more threads than required for a certain tilesize or
// when the batchsize is not a multiple of 16.
bool a_sh_wr_pred[a_sh_wr_iters];
#pragma unroll
for (int i = 0; i < a_sh_wr_iters; i++)
a_sh_wr_pred[i] = a_sh_wr_delta * i + a_sh_wr < a_sh_stride * prob_m;
// To ensure that writing and reading A tiles to/from shared memory, the
// latter in fragment format, is fully bank conflict free, we need to use a
// rather fancy XOR-based layout. The key here is that neither reads nor
// writes of the 16-byte `int4` blocks of 8 consecutive threads involve the
// same shared memory banks. Further, it seems (based on NSight-Compute) that
// each warp must also write a consecutive memory segment?
auto transform_a = [&](int i) {
int row = i / a_gl_rd_delta_o;
return a_gl_rd_delta_o * row + (i % a_gl_rd_delta_o) ^ row;
};
// Since the computation of this remapping is non-trivial and, due to our main
// loop unrolls, all shared memory accesses are static, we simply precompute
// both transformed reads and writes.
int a_sh_wr_trans[a_sh_wr_iters];
#pragma unroll
for (int i = 0; i < a_sh_wr_iters; i++)
a_sh_wr_trans[i] = transform_a(a_sh_wr_delta * i + a_sh_wr);
int a_sh_rd_trans[b_sh_wr_iters][thread_m_blocks];
#pragma unroll
for (int i = 0; i < b_sh_wr_iters; i++) {
#pragma unroll
for (int j = 0; j < thread_m_blocks; j++)
a_sh_rd_trans[i][j] =
transform_a(a_sh_rd_delta_o * i + a_sh_rd_delta_i * j + a_sh_rd);
}
// Since B-accesses have non-constant stride they have to be computed at
// runtime; we break dependencies between subsequent accesses with a tile by
// maintining multiple pointers (we have enough registers), a tiny
// optimization.
const int4 *B_ptr[b_sh_wr_iters];
#pragma unroll
for (int i = 0; i < b_sh_wr_iters; i++)
B_ptr[i] = B + b_gl_rd_delta_i * i + b_gl_rd;
extern __shared__ int4 sh[];
// Shared memory storage for global fetch pipelines.
int4 *sh_a = sh;
int4 *sh_b = sh_a + (stages * a_sh_stage);
int4 *sh_g_idx = sh_b + (stages * b_sh_stage);
int4 *sh_s = sh_g_idx + (stages * g_idx_stage);
// Register storage for double buffer of shared memory reads.
FragA frag_a[2][thread_m_blocks];
I4 frag_b_quant[2][b_thread_vecs];
FragC frag_c[thread_m_blocks][4][2];
FragS frag_s[2][4]; // No act-order
FragS act_frag_s[2][4][4]; // For act-order
// Zero accumulators.
auto zero_accums = [&]() {
#pragma unroll
for (int i = 0; i < thread_m_blocks * 4 * 2 * 4; i++)
reinterpret_cast<float *>(frag_c)[i] = 0;
};
int sh_first_group_id = -1;
int sh_num_groups = -1;
constexpr int sh_max_num_groups = 32;
auto fetch_scales_to_shared = [&](bool is_async, int first_group_id,
int last_group_id) {
sh_first_group_id = first_group_id;
sh_num_groups = last_group_id - first_group_id + 1;
if (sh_num_groups < sh_max_num_groups) {
sh_num_groups = sh_max_num_groups;
}
if (sh_first_group_id + sh_num_groups > num_groups) {
sh_num_groups = num_groups - sh_first_group_id;
}
int row_offset = first_group_id * s_gl_stride;
if (is_async) {
for (int i = 0; i < sh_num_groups; i++) {
if (threadIdx.x < s_sh_stride) {
cp_async4_pred(&sh_s[(i * s_sh_stride) + threadIdx.x],
&scales_ptr[row_offset + (i * s_gl_stride) +
slice_n_offset + threadIdx.x]);
}
}
} else {
for (int i = 0; i < sh_num_groups; i++) {
if (threadIdx.x < s_sh_stride) {
sh_s[(i * s_sh_stride) + threadIdx.x] =
scales_ptr[row_offset + (i * s_gl_stride) + slice_n_offset +
threadIdx.x];
}
}
}
};
// Asynchronously fetch the next A, B and s tile from global to the next
// shared memory pipeline location.
auto fetch_to_shared = [&](int pipe, int a_off, bool pred = true) {
if (pred) {
int4 *sh_a_stage = sh_a + a_sh_stage * pipe;
#pragma unroll
for (int i = 0; i < a_sh_wr_iters; i++) {
cp_async4_pred(
&sh_a_stage[a_sh_wr_trans[i]],
&A[a_gl_rd_delta_i * i + a_gl_rd + a_gl_rd_delta_o * a_off],
a_sh_wr_pred[i]);
}
int4 *sh_b_stage = sh_b + b_sh_stage * pipe;
#pragma unroll
for (int i = 0; i < b_sh_wr_iters; i++) {
#pragma unroll
for (int j = 0; j < b_thread_vecs; j++) {
cp_async4(&sh_b_stage[b_sh_wr_delta * i + b_sh_wr + j], B_ptr[i] + j);
}
B_ptr[i] += b_gl_rd_delta_o;
}
if constexpr (has_act_order) {
// Fetch g_idx thread-block portion
int full_pipe = a_off;
int cur_k = slice_k_start_shared_fetch + tb_k * full_pipe;
if (cur_k < prob_k && cur_k < slice_k_finish) {
int4 *sh_g_idx_stage = sh_g_idx + g_idx_stage * pipe;
int4 const *cur_g_idx_stage_ptr =
reinterpret_cast<int4 const *>(&g_idx[cur_k]);
if (threadIdx.x < g_idx_stage) {
cp_async4_pred(&sh_g_idx_stage[threadIdx.x],
&cur_g_idx_stage_ptr[threadIdx.x]);
}
}
} else {
if constexpr (group_blocks != -1) {
int4 *sh_s_stage = sh_s + s_sh_stage * pipe;
if constexpr (group_blocks >= thread_k_blocks) {
// Only fetch scales if this tile starts a new group
if (pipe % (group_blocks / thread_k_blocks) == 0) {
if (s_sh_wr_pred) {
cp_async4(&sh_s_stage[s_sh_wr], &scales_ptr[s_gl_rd]);
}
s_gl_rd += s_gl_rd_delta;
}
} else {
for (int i = 0; i < s_tb_groups; i++) {
if (s_sh_wr_pred) {
cp_async4(&sh_s_stage[i * s_sh_stride + s_sh_wr],
&scales_ptr[s_gl_rd]);
}
s_gl_rd += s_gl_rd_delta;
}
}
}
}
}
// Insert a fence even when we are winding down the pipeline to ensure that
// waiting is also correct at this point.
cp_async_fence();
};
// Wait until the next thread tile has been loaded to shared memory.
auto wait_for_stage = [&]() {
// We only have `stages - 2` active fetches since we are double buffering
// and can only issue the next fetch when it is guaranteed that the previous
// shared memory load is fully complete (as it may otherwise be
// overwritten).
cp_async_wait<stages - 2>();
__syncthreads();
};
// Load the next sub-tile from the current location in the shared memory pipe
// into the current register buffer.
auto fetch_to_registers = [&](int k, int pipe) {
int4 *sh_a_stage = sh_a + a_sh_stage * pipe;
#pragma unroll
for (int i = 0; i < thread_m_blocks; i++)
ldsm4(frag_a[k % 2][i], &sh_a_stage[a_sh_rd_trans[k % b_sh_wr_iters][i]]);
int4 *sh_b_stage = sh_b + b_sh_stage * pipe;
#pragma unroll
for (int i = 0; i < b_thread_vecs; i++) {
frag_b_quant[k % 2][i] = *reinterpret_cast<I4 *>(
&sh_b_stage[b_sh_rd_delta * (k % b_sh_wr_iters) + b_sh_rd + i]);
}
};
bool is_same_group[stages];
int same_group_id[stages];
auto init_same_group = [&](int pipe) {
if constexpr (!has_act_order) {
is_same_group[pipe] = false;
same_group_id[pipe] = 0;
return;
}
int4 *sh_g_idx_stage = sh_g_idx + g_idx_stage * pipe;
int *sh_g_idx_int_ptr = reinterpret_cast<int *>(sh_g_idx_stage);
int group_id_1 = sh_g_idx_int_ptr[0];
int group_id_2 = sh_g_idx_int_ptr[tb_k - 1];
is_same_group[pipe] = group_id_1 == group_id_2;
same_group_id[pipe] = group_id_1;
};
auto fetch_scales_to_registers = [&](int k, int full_pipe) {
int pipe = full_pipe % stages;
if constexpr (!has_act_order) {
// No act-order case
if constexpr (group_blocks != -1) {
if constexpr (group_blocks >= thread_k_blocks) {
int4 *sh_s_stage =
sh_s + s_sh_stage * ((group_blocks / thread_k_blocks) *
(pipe / (group_blocks / thread_k_blocks)));
reinterpret_cast<int4 *>(&frag_s[k % 2])[0] = sh_s_stage[s_sh_rd];
} else {
int warp_id = threadIdx.x / 32;
int n_warps = thread_n_blocks / 4;
int warp_row = warp_id / n_warps;
int cur_k = warp_row * 16;
cur_k += k_iter_size * (k % b_sh_wr_iters);
int k_blocks = cur_k / 16;
int cur_group_id = k_blocks / group_blocks;
int4 *sh_s_stage = sh_s + s_sh_stage * pipe;
reinterpret_cast<int4 *>(&frag_s[k % 2])[0] =
sh_s_stage[s_sh_rd + cur_group_id * s_sh_stride];
}
}
return;
}
// Act-order case
// Determine K of the "current" thread-block
int cur_k = slice_k_start + tb_k * full_pipe;
if (cur_k >= prob_k || cur_k >= slice_k_finish) {
return;
}
// Reset (to current thread-block) since we read g_idx portion from the
// shared memory
cur_k = 0;
// Progress to current iteration
cur_k += k_iter_size * (k % b_sh_wr_iters);
// Determine "position" inside the thread-block (based on warp and
// thread-id)
int warp_id = threadIdx.x / 32;
int n_warps =
thread_n_blocks / 4; // Each warp processes 4 16-size tiles over N
int warp_row = warp_id / n_warps;
int warp_col = warp_id % n_warps;
cur_k += warp_row * 16;
int th_id = threadIdx.x % 32;
cur_k += (th_id % 4) * 2; // Due to tensor-core layout for fp16 B matrix
int s_col_shift =
/*slice_n_offset +*/ (act_s_col_warp_stride * warp_col) +
(th_id / 4) * act_s_col_stride;
if (is_same_group[pipe]) {
if (k % 2 == 0) {
*(reinterpret_cast<int4 *>(&(act_frag_s[k % 2][0][0]))) =
sh_s[(same_group_id[pipe] - sh_first_group_id) * s_sh_stride +
s_col_shift];
} else {
*(reinterpret_cast<int4 *>(&(act_frag_s[k % 2][0][0]))) =
*(reinterpret_cast<int4 *>(&(act_frag_s[(k - 1) % 2][0][0])));
}
for (int i = 1; i < 4; i++) {
*(reinterpret_cast<int4 *>(&(act_frag_s[k % 2][i][0]))) =
*(reinterpret_cast<int4 *>(&(act_frag_s[k % 2][0][0])));
}
return;
}
int4 *sh_g_idx_stage = sh_g_idx + g_idx_stage * pipe;
int *sh_g_idx_int_ptr = reinterpret_cast<int *>(sh_g_idx_stage);
constexpr int k_frag_offsets[4] = {0, 1, 8,
9}; // Tensor core offsets per thread
#pragma unroll
for (int i = 0; i < 4; i++) {
int actual_k = cur_k + k_frag_offsets[i];
int group_id = sh_g_idx_int_ptr[actual_k];
int rel_group_id = group_id - sh_first_group_id;
*(reinterpret_cast<int4 *>(&(act_frag_s[k % 2][i][0]))) =
sh_s[rel_group_id * s_sh_stride + s_col_shift];
}
};
// Execute the actual tensor core matmul of a sub-tile.
auto matmul = [&](int k) {
// We have the m dimension as the inner loop in order to encourage overlapping
// dequantization and matmul operations.
#pragma unroll
for (int j = 0; j < 4; j++) {
FragB frag_b0;
FragB frag_b1;
if constexpr (num_bits == 4) {
int b_quant = frag_b_quant[k % 2][0][j];
int b_quant_shift = b_quant >> 8;
frag_b0 = dequant_4bit(b_quant);
frag_b1 = dequant_4bit(b_quant_shift);
} else {
int *frag_b_quant_ptr = reinterpret_cast<int *>(frag_b_quant[k % 2]);
int b_quant_0 = frag_b_quant_ptr[j * 2 + 0];
int b_quant_1 = frag_b_quant_ptr[j * 2 + 1];
frag_b0 = dequant_8bit(b_quant_0);
frag_b1 = dequant_8bit(b_quant_1);
}
// Apply scale to frag_b0
if constexpr (has_act_order) {
scale4(frag_b0, act_frag_s[k % 2][0][j], act_frag_s[k % 2][1][j],
act_frag_s[k % 2][2][j], act_frag_s[k % 2][3][j], 0);
} else {
if constexpr (group_blocks != -1) {
scale(frag_b0, frag_s[k % 2][j], 0);
}
}
// Apply scale to frag_b1
if constexpr (has_act_order) {
scale4(frag_b1, act_frag_s[k % 2][0][j], act_frag_s[k % 2][1][j],
act_frag_s[k % 2][2][j], act_frag_s[k % 2][3][j], 1);
} else {
if constexpr (group_blocks != -1) {
scale(frag_b1, frag_s[k % 2][j], 1);
}
}
#pragma unroll
for (int i = 0; i < thread_m_blocks; i++) {
mma(frag_a[k % 2][i], frag_b0, frag_c[i][j][0]);
mma(frag_a[k % 2][i], frag_b1, frag_c[i][j][1]);
}
}
};
// Since we slice across the k dimension of a tile in order to increase the
// number of warps while keeping the n dimension of a tile reasonable, we have
// multiple warps that accumulate their partial sums of the same output
// location; which we have to reduce over in the end. We do in shared memory.
auto thread_block_reduce = [&]() {
constexpr int red_off = threads / b_sh_stride_threads / 2;
if (red_off >= 1) {
int red_idx = threadIdx.x / b_sh_stride_threads;
constexpr int red_sh_stride = b_sh_stride_threads * 4 * 2;
constexpr int red_sh_delta = b_sh_stride_threads;
int red_sh_rd = red_sh_stride * (threadIdx.x / b_sh_stride_threads) +
(threadIdx.x % b_sh_stride_threads);
// Parallel logarithmic shared memory reduction. We make sure to avoid any
// unnecessary read or write iterations, e.g., for two warps we write only
// once by warp 1 and read only once by warp 0.
#pragma unroll
for (int m_block = 0; m_block < thread_m_blocks; m_block++) {
#pragma unroll
for (int i = red_off; i > 0; i /= 2) {
if (i <= red_idx && red_idx < 2 * i) {
#pragma unroll
for (int j = 0; j < 4 * 2; j++) {
int red_sh_wr =
red_sh_delta * j + (red_sh_rd - red_sh_stride * i);
if (i < red_off) {
float *c_rd = reinterpret_cast<float *>(
&sh[red_sh_delta * j + red_sh_rd]);
float *c_wr = reinterpret_cast<float *>(&sh[red_sh_wr]);
#pragma unroll
for (int k = 0; k < 4; k++)
reinterpret_cast<FragC *>(frag_c)[4 * 2 * m_block + j][k] +=
c_rd[k] + c_wr[k];
}
sh[red_sh_wr] =
reinterpret_cast<int4 *>(&frag_c)[4 * 2 * m_block + j];
}
}
__syncthreads();
}
if (red_idx == 0) {
#pragma unroll
for (int i = 0; i < 4 * 2; i++) {
float *c_rd =
reinterpret_cast<float *>(&sh[red_sh_delta * i + red_sh_rd]);
#pragma unroll
for (int j = 0; j < 4; j++)
reinterpret_cast<FragC *>(frag_c)[4 * 2 * m_block + i][j] +=
c_rd[j];
}
}
__syncthreads();
}
}
};
// Since multiple threadblocks may process parts of the same column slice, we
// finally have to globally reduce over the results. As the striped partitioning
// minimizes the number of such reductions and our outputs are usually rather
// small, we perform this reduction serially in L2 cache.
auto global_reduce = [&](bool first = false, bool last = false) {
// We are very careful here to reduce directly in the output buffer to
// maximize L2 cache utilization in this step. To do this, we write out
// results in FP16 (but still reduce with FP32 compute).
constexpr int active_threads = 32 * thread_n_blocks / 4;
if (threadIdx.x < active_threads) {
int c_gl_stride = prob_n / 8;
int c_gl_wr_delta_o = 8 * c_gl_stride;
int c_gl_wr_delta_i = 4 * (active_threads / 32);
int c_gl_wr = c_gl_stride * ((threadIdx.x % 32) / 4) +
4 * (threadIdx.x / 32) + threadIdx.x % 4;
c_gl_wr += (2 * thread_n_blocks) * slice_col;
constexpr int c_sh_wr_delta = active_threads;
int c_sh_wr = threadIdx.x;
int row = (threadIdx.x % 32) / 4;
if (!first) {
// Interestingly, doing direct global accesses here really seems to mess up the
// compiler and lead to slowdowns, hence we also use async-copies even though
// these fetches are not actually asynchronous.
#pragma unroll
for (int i = 0; i < thread_m_blocks * 4; i++) {
cp_async4_pred(&sh[c_sh_wr + c_sh_wr_delta * i],
&C[c_gl_wr + c_gl_wr_delta_o * (i / 2) +
c_gl_wr_delta_i * (i % 2)],
i < (thread_m_blocks - 1) * 4 ||
8 * (i / 2) + row < prob_m);
}
cp_async_fence();
cp_async_wait<0>();
}
#pragma unroll
for (int i = 0; i < thread_m_blocks * 4; i++) {
if (i < (thread_m_blocks - 1) * 4 || 8 * (i / 2) + row < prob_m) {
if (!first) {
int4 c_red = sh[c_sh_wr + i * c_sh_wr_delta];
#pragma unroll
for (int j = 0; j < 2 * 4; j++) {
reinterpret_cast<float *>(
&frag_c)[4 * 2 * 4 * (i / 4) + 4 * j + (i % 4)] +=
__half2float(reinterpret_cast<__half *>(&c_red)[j]);
}
}
if (!last) {
int4 c;
#pragma unroll
for (int j = 0; j < 2 * 4; j++) {
reinterpret_cast<__half *>(&c)[j] =
__float2half(reinterpret_cast<float *>(
&frag_c)[4 * 2 * 4 * (i / 4) + 4 * j + (i % 4)]);
}
C[c_gl_wr + c_gl_wr_delta_o * (i / 2) + c_gl_wr_delta_i * (i % 2)] =
c;
}
}
}
}
};
// Write out the reduce final result in the correct layout. We only actually
// reshuffle matrix fragments in this step, the reduction above is performed
// in fragment layout.
auto write_result = [&]() {
int c_gl_stride = prob_n / 8;
constexpr int c_sh_stride = 2 * thread_n_blocks + 1;
int c_gl_wr_delta = c_gl_stride * (threads / (2 * thread_n_blocks));
constexpr int c_sh_rd_delta =
c_sh_stride * (threads / (2 * thread_n_blocks));
int c_gl_wr = c_gl_stride * (threadIdx.x / (2 * thread_n_blocks)) +
(threadIdx.x % (2 * thread_n_blocks));
c_gl_wr += (2 * thread_n_blocks) * slice_col;
int c_sh_wr =
(4 * c_sh_stride) * ((threadIdx.x % 32) / 4) + (threadIdx.x % 32) % 4;
c_sh_wr += 32 * (threadIdx.x / 32);
int c_sh_rd = c_sh_stride * (threadIdx.x / (2 * thread_n_blocks)) +
(threadIdx.x % (2 * thread_n_blocks));
int c_gl_wr_end = c_gl_stride * prob_m;
// We first reorder in shared memory to guarantee the most efficient final
// global write patterns
auto write = [&](int idx, float c0, float c1, FragS &s) {
half2 res = __halves2half2(__float2half(c0), __float2half(c1));
// For per-column quantization we finally apply the scale here (only for
// 4-bit)
if constexpr (!has_act_order && group_blocks == -1 && num_bits == 4) {
res = __hmul2(res, s[0]);
}
((half2 *)sh)[idx] = res;
};
if (threadIdx.x / 32 < thread_n_blocks / 4) {
#pragma unroll
for (int i = 0; i < thread_m_blocks; i++) {
#pragma unroll
for (int j = 0; j < 4; j++) {
int wr = c_sh_wr + 8 * j;
write(wr + (4 * c_sh_stride) * 0 + 0, frag_c[i][j][0][0],
frag_c[i][j][0][1], frag_s[j / 2][2 * (j % 2) + 0]);
write(wr + (4 * c_sh_stride) * 8 + 0, frag_c[i][j][0][2],
frag_c[i][j][0][3], frag_s[j / 2][2 * (j % 2) + 0]);
write(wr + (4 * c_sh_stride) * 0 + 4, frag_c[i][j][1][0],
frag_c[i][j][1][1], frag_s[j / 2][2 * (j % 2) + 1]);
write(wr + (4 * c_sh_stride) * 8 + 4, frag_c[i][j][1][2],
frag_c[i][j][1][3], frag_s[j / 2][2 * (j % 2) + 1]);
}
c_sh_wr += 16 * (4 * c_sh_stride);
}
}
__syncthreads();
#pragma unroll
for (int i = 0;
i < div_ceil(16 * thread_m_blocks, threads / (2 * thread_n_blocks));
i++) {
if (c_gl_wr < c_gl_wr_end) {
C[c_gl_wr] = sh[c_sh_rd];
c_gl_wr += c_gl_wr_delta;
c_sh_rd += c_sh_rd_delta;
}
}
};
// Start global fetch and register load pipelines.
auto start_pipes = [&]() {
#pragma unroll
for (int i = 0; i < stages - 1; i++) {
if (has_act_order && i == 0) {
int last_g_idx = slice_k_start + stages * tb_k * 2;
if (last_g_idx >= prob_k) {
last_g_idx = prob_k - 1;
}
fetch_scales_to_shared(true, g_idx[slice_k_start], g_idx[last_g_idx]);
}
fetch_to_shared(i, i, i < slice_iters);
}
zero_accums();
wait_for_stage();
init_same_group(0);
fetch_to_registers(0, 0);
fetch_scales_to_registers(0, 0);
a_gl_rd += a_gl_rd_delta_o * (stages - 1);
slice_k_start_shared_fetch += tb_k * (stages - 1);
};
if (slice_iters) {
start_pipes();
}
// Main loop.
while (slice_iters) {
// We unroll over both the global fetch and the register load pipeline to
// ensure all shared memory accesses are static. Note that both pipelines
// have even length meaning that the next iteration will always start at
// index 0.
#pragma unroll
for (int pipe = 0; pipe < stages;) {
#pragma unroll
for (int k = 0; k < b_sh_wr_iters; k++) {
fetch_to_registers(k + 1, pipe % stages);
fetch_scales_to_registers(k + 1, pipe);
if (k == b_sh_wr_iters - 2) {
fetch_to_shared((pipe + stages - 1) % stages, pipe,
slice_iters >= stages);
pipe++;
wait_for_stage();
init_same_group(pipe % stages);
}
matmul(k);
}
slice_iters--;
if (slice_iters == 0) {
break;
}
}
a_gl_rd += a_gl_rd_delta_o * stages;
slice_k_start += tb_k * stages;
slice_k_start_shared_fetch += tb_k * stages;
if constexpr (has_act_order) {
int first_group_id = g_idx[slice_k_start];
int last_g_idx = slice_k_start + stages * tb_k * 2;
if (last_g_idx >= prob_k) {
last_g_idx = prob_k - 1;
}
int last_group_id = g_idx[last_g_idx];
if (last_group_id >= sh_first_group_id + sh_num_groups) {
fetch_scales_to_shared(false, first_group_id, last_group_id);
__syncthreads();
}
}
// Process results and, if necessary, proceed to the next column slice.
// While this pattern may not be the most readable, other ways of writing
// the loop seemed to noticeably worse performance after compilation.
if (slice_iters == 0) {
cp_async_wait<0>();
bool last = slice_idx == slice_count - 1;
// For per-column scales, we only fetch them here in the final step before
// write-out
if constexpr (!has_act_order && group_blocks == -1) {
if constexpr (num_bits == 8) {
if (s_sh_wr_pred) {
cp_async4(&sh_s[s_sh_wr], &scales_ptr[s_gl_rd]);
}
cp_async_fence();
} else {
if (last) {
if (s_sh_wr_pred) {
cp_async4(&sh_s[s_sh_wr], &scales_ptr[s_gl_rd]);
}
cp_async_fence();
}
}
}
thread_block_reduce();
if constexpr (!has_act_order && group_blocks == -1) {
if constexpr (num_bits == 8) {
cp_async_wait<0>();
__syncthreads();
if (threadIdx.x / 32 < thread_n_blocks / 4) {
reinterpret_cast<int4 *>(&frag_s)[0] = sh_s[s_sh_rd + 0];
reinterpret_cast<int4 *>(&frag_s)[1] = sh_s[s_sh_rd + 4];
}
} else {
if (last) {
cp_async_wait<0>();
__syncthreads();
if (threadIdx.x / 32 < thread_n_blocks / 4) {
reinterpret_cast<int4 *>(&frag_s)[0] = sh_s[s_sh_rd + 0];
reinterpret_cast<int4 *>(&frag_s)[1] = sh_s[s_sh_rd + 4];
}
}
}
}
// For 8-bit channelwise, we apply the scale before the global reduction
// that converts the fp32 results to fp16 (so that we avoid possible
// overflow in fp16)
if constexpr (!has_act_order && group_blocks == -1 && num_bits == 8) {
if (threadIdx.x / 32 < thread_n_blocks / 4) {
#pragma unroll
for (int i = 0; i < thread_m_blocks; i++) {
#pragma unroll
for (int j = 0; j < 4; j++) {
scale_float(reinterpret_cast<float *>(&frag_c[i][j][0][0]),
frag_s[j / 2][2 * (j % 2) + 0]);
scale_float(reinterpret_cast<float *>(&frag_c[i][j][0][2]),
frag_s[j / 2][2 * (j % 2) + 0]);
scale_float(reinterpret_cast<float *>(&frag_c[i][j][1][0]),
frag_s[j / 2][2 * (j % 2) + 1]);
scale_float(reinterpret_cast<float *>(&frag_c[i][j][1][2]),
frag_s[j / 2][2 * (j % 2) + 1]);
}
}
}
}
if (slice_count > 1) { // only globally reduce if there is more than one
// block in a slice
barrier_acquire(&locks[slice_col], slice_idx);
global_reduce(slice_idx == 0, last);
barrier_release(&locks[slice_col], last);
}
if (last) // only the last block in a slice actually writes the result
write_result();
slice_row = 0;
slice_col_par++;
slice_col++;
init_slice();
if (slice_iters) {
a_gl_rd = a_gl_stride * (threadIdx.x / a_gl_rd_delta_o) +
(threadIdx.x % a_gl_rd_delta_o);
#pragma unroll
for (int i = 0; i < b_sh_wr_iters; i++)
B_ptr[i] += b_sh_stride - b_gl_rd_delta_o * k_tiles;
if (slice_col == 0) {
#pragma unroll
for (int i = 0; i < b_sh_wr_iters; i++)
B_ptr[i] -= b_gl_stride;
}
// Update slice k/n for scales loading
if constexpr (has_act_order) {
slice_k_start = tb_k * slice_row;
slice_k_finish = slice_k_start + tb_k * slice_iters;
slice_k_start_shared_fetch = slice_k_start;
slice_n_offset = act_s_col_tb_stride * slice_col;
} else {
s_gl_rd = s_sh_stride * slice_col + threadIdx.x;
}
start_pipes();
}
}
}
}
#define __CALL_IF(NUM_BITS, THREAD_M_BLOCKS, THREAD_N_BLOCKS, THREAD_K_BLOCKS, \
HAS_ACT_ORDER, GROUP_BLOCKS, NUM_THREADS) \
else if (num_bits == NUM_BITS && thread_m_blocks == THREAD_M_BLOCKS && \
thread_n_blocks == THREAD_N_BLOCKS && \
thread_k_blocks == THREAD_K_BLOCKS && \
has_act_order == HAS_ACT_ORDER && group_blocks == GROUP_BLOCKS && \
num_threads == NUM_THREADS) { \
cudaFuncSetAttribute( \
Marlin<NUM_BITS, NUM_THREADS, THREAD_M_BLOCKS, THREAD_N_BLOCKS, \
THREAD_K_BLOCKS, pipe_stages, HAS_ACT_ORDER, GROUP_BLOCKS>, \
cudaFuncAttributeMaxDynamicSharedMemorySize, max_shared_mem); \
Marlin<NUM_BITS, NUM_THREADS, THREAD_M_BLOCKS, THREAD_N_BLOCKS, \
THREAD_K_BLOCKS, pipe_stages, HAS_ACT_ORDER, GROUP_BLOCKS> \
<<<blocks, NUM_THREADS, max_shared_mem, stream>>>( \
A_ptr, B_ptr, C_ptr, s_ptr, g_idx_ptr, num_groups, prob_m, prob_n, \
prob_k, locks); \
}
typedef struct {
int thread_k;
int thread_n;
int num_threads;
} thread_config_t;
typedef struct {
int max_m_blocks;
thread_config_t tb_cfg;
} exec_config_t;
thread_config_t thread_configs[] = {
// Ordered by priority
// thread_k, thread_n, num_threads
{64, 256, 256}, // Default (max cache usage)
{64, 128, 128}, // Reduce N, reduce warps
{128, 64, 128}, // Reduce N more, but increase K
};
int get_scales_cache_size(thread_config_t const &th_config, int prob_m,
int prob_n, int prob_k, int num_bits, int group_size,
bool has_act_order, bool is_k_full) {
bool cache_scales_chunk = has_act_order && !is_k_full;
int tb_n = th_config.thread_n;
int tb_k = th_config.thread_k;
// Get max scale groups per thread-block
int tb_groups;
if (group_size == -1) {
tb_groups = 1;
} else if (group_size == 0) {
tb_groups = div_ceil(tb_k, 32); // Worst case is 32 group size
} else {
tb_groups = div_ceil(tb_k, group_size);
}
if (cache_scales_chunk) {
int load_groups =
tb_groups * pipe_stages * 2; // Chunk size is 2x pipeline over dim K
load_groups = max(load_groups, 32); // We load at least 32 scale groups
return load_groups * tb_n * 2;
} else {
int tb_scales = tb_groups * tb_n * 2;
return tb_scales * pipe_stages;
}
}
bool is_valid_cache_size(thread_config_t const &th_config, int max_m_blocks,
int prob_m, int prob_n, int prob_k, int num_bits,
int scales_cache_size, int max_shared_mem) {
int pack_factor = 32 / num_bits;
// Get B size
int tb_k = th_config.thread_k;
int tb_n = th_config.thread_n;
int b_size = (tb_k * tb_n / pack_factor) * 4;
// Get A size
int m_blocks = div_ceil(prob_m, 16);
int tb_max_m = 16;
while (true) {
if (m_blocks >= max_m_blocks) {
tb_max_m *= max_m_blocks;
break;
}
max_m_blocks--;
if (max_m_blocks == 0) {
TORCH_CHECK(false, "Unexpected m_blocks = ", m_blocks);
}
}
int a_size = (tb_max_m * tb_k) * 2;
float pipe_size = (a_size + b_size) * pipe_stages;
TORCH_CHECK(max_shared_mem / 2 > scales_cache_size); // Sanity
return pipe_size < 0.95f * (max_shared_mem - scales_cache_size);
}
bool is_valid_config(thread_config_t const &th_config, int max_m_blocks,
int prob_m, int prob_n, int prob_k, int num_bits,
int group_size, bool has_act_order, bool is_k_full,
int max_shared_mem) {
// Sanity
if (th_config.thread_k == -1 || th_config.thread_n == -1 ||
th_config.num_threads == -1) {
return false;
}
// Verify K/N are divisible by thread K/N
if (prob_k % th_config.thread_k != 0 || prob_n % th_config.thread_n != 0) {
return false;
}
// Verify min for thread K/N
if (th_config.thread_n < min_thread_n || th_config.thread_k < min_thread_k) {
return false;
}
// num_threads must be at least 128 (= 4 warps)
if (th_config.num_threads < 128) {
return false;
}
// Determine cache for scales
int scales_cache_size =
get_scales_cache_size(th_config, prob_m, prob_n, prob_k, num_bits,
group_size, has_act_order, is_k_full);
// Check that pipeline fits into cache
if (!is_valid_cache_size(th_config, max_m_blocks, prob_m, prob_n, prob_k,
num_bits, scales_cache_size, max_shared_mem)) {
return false;
}
return true;
}
exec_config_t determine_thread_config(int prob_m, int prob_n, int prob_k,
int num_bits, int group_size,
bool has_act_order, bool is_k_full,
int max_shared_mem) {
int max_m_blocks = 4;
while (max_m_blocks > 0) {
for (auto th_config : thread_configs) {
if (is_valid_config(th_config, max_m_blocks, prob_m, prob_n, prob_k,
num_bits, group_size, has_act_order, is_k_full,
max_shared_mem)) {
return exec_config_t{max_m_blocks, th_config};
}
}
printf("WARNING: Marlin kernel is reducing max_m_blocks due to small SM "
"GPU cache. This may "
"hurt performance. Consider upgrading your GPU.\n");
max_m_blocks--; // Process less M blocks per invocation to reduce cache
// usage
}
return exec_config_t{0, {-1, -1, -1}};
}
#define CALL_IF(NUM_BITS, N_BLOCKS, K_BLOCKS, NUM_THREADS) \
__CALL_IF(NUM_BITS, 1, N_BLOCKS, K_BLOCKS, true, 0, NUM_THREADS) \
__CALL_IF(NUM_BITS, 2, N_BLOCKS, K_BLOCKS, true, 0, NUM_THREADS) \
__CALL_IF(NUM_BITS, 3, N_BLOCKS, K_BLOCKS, true, 0, NUM_THREADS) \
__CALL_IF(NUM_BITS, 4, N_BLOCKS, K_BLOCKS, true, 0, NUM_THREADS) \
\
__CALL_IF(NUM_BITS, 1, N_BLOCKS, K_BLOCKS, false, -1, NUM_THREADS) \
__CALL_IF(NUM_BITS, 1, N_BLOCKS, K_BLOCKS, false, 2, NUM_THREADS) \
__CALL_IF(NUM_BITS, 1, N_BLOCKS, K_BLOCKS, false, 4, NUM_THREADS) \
__CALL_IF(NUM_BITS, 1, N_BLOCKS, K_BLOCKS, false, 8, NUM_THREADS) \
\
__CALL_IF(NUM_BITS, 2, N_BLOCKS, K_BLOCKS, false, -1, NUM_THREADS) \
__CALL_IF(NUM_BITS, 2, N_BLOCKS, K_BLOCKS, false, 2, NUM_THREADS) \
__CALL_IF(NUM_BITS, 2, N_BLOCKS, K_BLOCKS, false, 4, NUM_THREADS) \
__CALL_IF(NUM_BITS, 2, N_BLOCKS, K_BLOCKS, false, 8, NUM_THREADS) \
\
__CALL_IF(NUM_BITS, 3, N_BLOCKS, K_BLOCKS, false, -1, NUM_THREADS) \
__CALL_IF(NUM_BITS, 3, N_BLOCKS, K_BLOCKS, false, 2, NUM_THREADS) \
__CALL_IF(NUM_BITS, 3, N_BLOCKS, K_BLOCKS, false, 4, NUM_THREADS) \
__CALL_IF(NUM_BITS, 3, N_BLOCKS, K_BLOCKS, false, 8, NUM_THREADS) \
\
__CALL_IF(NUM_BITS, 4, N_BLOCKS, K_BLOCKS, false, -1, NUM_THREADS) \
__CALL_IF(NUM_BITS, 4, N_BLOCKS, K_BLOCKS, false, 2, NUM_THREADS) \
__CALL_IF(NUM_BITS, 4, N_BLOCKS, K_BLOCKS, false, 4, NUM_THREADS) \
__CALL_IF(NUM_BITS, 4, N_BLOCKS, K_BLOCKS, false, 8, NUM_THREADS)
void marlin_mm_f16i4(const void *A, const void *B, void *C, void *s,
void *g_idx, void *perm, void *a_tmp, int prob_m,
int prob_n, int prob_k, void *workspace, int num_bits,
bool has_act_order, bool is_k_full, int num_groups,
int group_size, int dev, cudaStream_t stream, int thread_k,
int thread_n, int sms, int max_par) {
TORCH_CHECK(num_bits == 4 || num_bits == 8,
"num_bits must be 4 or 8. Got = ", num_bits);
TORCH_CHECK(prob_m > 0 && prob_n > 0 && prob_k > 0, "Invalid MNK = [", prob_m,
", ", prob_n, ", ", prob_k, "]");
int tot_m = prob_m;
int tot_m_blocks = div_ceil(tot_m, 16);
int pad = 16 * tot_m_blocks - tot_m;
if (sms == -1) {
cudaDeviceGetAttribute(&sms, cudaDevAttrMultiProcessorCount, dev);
}
int max_shared_mem = 0;
cudaDeviceGetAttribute(&max_shared_mem,
cudaDevAttrMaxSharedMemoryPerBlockOptin, dev);
TORCH_CHECK(max_shared_mem > 0);
// Set thread config
exec_config_t exec_cfg;
if (thread_k != -1 && thread_n != -1) {
// User-defined config
exec_cfg =
exec_config_t{4, thread_config_t{thread_k, thread_n, default_threads}};
} else {
// Auto config
exec_cfg =
determine_thread_config(prob_m, prob_n, prob_k, num_bits, group_size,
has_act_order, is_k_full, max_shared_mem);
}
TORCH_CHECK(exec_cfg.max_m_blocks > 0 &&
is_valid_config(exec_cfg.tb_cfg, exec_cfg.max_m_blocks,
prob_m, prob_n, prob_k, num_bits, group_size,
has_act_order, is_k_full, max_shared_mem),
"Invalid thread config: max_m_blocks = ", exec_cfg.max_m_blocks,
", thread_k = ", exec_cfg.tb_cfg.thread_k,
", thread_n = ", exec_cfg.tb_cfg.thread_n,
", num_threads = ", exec_cfg.tb_cfg.num_threads, " for MKN = [",
prob_m, ", ", prob_k, ", ", prob_n, "] and num_bits = ", num_bits,
", group_size = ", group_size,
", has_act_order = ", has_act_order, ", is_k_full = ", is_k_full,
", max_shared_mem = ", max_shared_mem);
int num_threads = exec_cfg.tb_cfg.num_threads;
thread_k = exec_cfg.tb_cfg.thread_k;
thread_n = exec_cfg.tb_cfg.thread_n;
int thread_k_blocks = thread_k / 16;
int thread_n_blocks = thread_n / 16;
int blocks = sms;
TORCH_CHECK(prob_n % thread_n == 0, "prob_n = ", prob_n,
" is not divisible by thread_n = ", thread_n);
TORCH_CHECK(prob_k % thread_k == 0, "prob_k = ", prob_k,
" is not divisible by thread_k = ", thread_k);
int group_blocks = 0;
if (has_act_order) {
if (is_k_full) {
TORCH_CHECK(group_size != -1);
group_blocks = group_size / 16;
TORCH_CHECK(prob_k % group_blocks == 0, "prob_k = ", prob_k,
" is not divisible by group_blocks = ", group_blocks);
} else {
TORCH_CHECK(group_size == 0);
group_blocks = 0;
}
} else {
if (group_size == -1) {
group_blocks = -1;
} else {
group_blocks = group_size / 16;
TORCH_CHECK(prob_k % group_blocks == 0, "prob_k = ", prob_k,
" is not divisible by group_blocks = ", group_blocks);
}
}
const int4 *A_ptr = (const int4 *)A;
const int4 *B_ptr = (const int4 *)B;
int4 *C_ptr = (int4 *)C;
const int4 *s_ptr = (const int4 *)s;
const int *g_idx_ptr = (const int *)g_idx;
const int *perm_ptr = (const int *)perm;
int4 *a_tmp_ptr = (int4 *)a_tmp;
int *locks = (int *)workspace;
if (has_act_order) {
// Permute A columns
int block_rows = div_ceil(prob_m, blocks);
permute_cols_kernel<<<blocks, default_threads, 0, stream>>>(
A_ptr, perm_ptr, a_tmp_ptr, prob_m, prob_k, block_rows);
A_ptr = a_tmp_ptr;
}
// If we have a full K, then we can run the non-act-order version of Marlin
// (since the weight rows are reordered by increasing group ids, and by having
// a full K, we have full original groups)
if (is_k_full) {
has_act_order = false;
}
// Main loop
for (int i = 0; i < tot_m_blocks; i += exec_cfg.max_m_blocks) {
int thread_m_blocks = tot_m_blocks - i;
prob_m = tot_m - 16 * i;
int par = 1;
if (thread_m_blocks > exec_cfg.max_m_blocks) {
// Note that parallel > 1 currently only works for inputs without any
// padding
par = (16 * thread_m_blocks - pad) / (16 * exec_cfg.max_m_blocks);
if (par > max_par)
par = max_par;
prob_m = (16 * exec_cfg.max_m_blocks) * par;
i += exec_cfg.max_m_blocks * (par - 1);
thread_m_blocks = exec_cfg.max_m_blocks;
}
// Define kernel configurations
if (false) {
}
CALL_IF(4, 32, 2, 256)
CALL_IF(4, 16, 4, 256)
CALL_IF(4, 8, 4, 128)
CALL_IF(4, 4, 8, 128)
CALL_IF(8, 32, 2, 256)
CALL_IF(8, 16, 4, 256)
CALL_IF(8, 8, 4, 128)
CALL_IF(8, 4, 8, 128)
else {
TORCH_CHECK(false, "Unsupported shapes: MNK = [" + str(prob_m) + ", " +
str(prob_n) + ", " + str(prob_k) + "]" +
", has_act_order = " + str(has_act_order) +
", num_groups = " + str(num_groups) +
", group_size = " + str(group_size) +
", thread_m_blocks = " + str(thread_m_blocks) +
", thread_n_blocks = " + str(thread_n_blocks) +
", thread_k_blocks = " + str(thread_k_blocks));
}
A_ptr += 16 * thread_m_blocks * (prob_k / 8) * par;
C_ptr += 16 * thread_m_blocks * (prob_n / 8) * par;
}
}
} // namespace gptq_marlin
torch::Tensor gptq_marlin_gemm(torch::Tensor &a, torch::Tensor &b_q_weight,
torch::Tensor &b_scales, torch::Tensor &g_idx,
torch::Tensor &perm, torch::Tensor &workspace,
int64_t num_bits, int64_t size_m, int64_t size_n,
int64_t size_k, bool is_k_full) {
// Verify num_bits
TORCH_CHECK(num_bits == 4 || num_bits == 8,
"num_bits must be 4 or 8. Got = ", num_bits);
int pack_factor = 32 / num_bits;
// Verify A
TORCH_CHECK(a.size(0) == size_m, "Shape mismatch: a.size(0) = ", a.size(0),
", size_m = ", size_m);
TORCH_CHECK(a.size(1) == size_k, "Shape mismatch: a.size(1) = ", a.size(1),
", size_k = ", size_k);
// Verify B
TORCH_CHECK(size_k % gptq_marlin::tile_size == 0, "size_k = ", size_k,
" is not divisible by tile_size = ", gptq_marlin::tile_size);
TORCH_CHECK((size_k / gptq_marlin::tile_size) == b_q_weight.size(0),
"Shape mismatch: b_q_weight.size(0) = ", b_q_weight.size(0),
", size_k = ", size_k, ", tile_size = ", gptq_marlin::tile_size);
TORCH_CHECK(b_q_weight.size(1) % gptq_marlin::tile_size == 0,
"b_q_weight.size(1) = ", b_q_weight.size(1),
" is not divisible by tile_size = ", gptq_marlin::tile_size);
int actual_size_n =
(b_q_weight.size(1) / gptq_marlin::tile_size) * pack_factor;
TORCH_CHECK(size_n == actual_size_n, "size_n = ", size_n,
", actual_size_n = ", actual_size_n);
// Verify device and strides
TORCH_CHECK(a.device().is_cuda(), "A is not on GPU");
TORCH_CHECK(a.is_contiguous(), "A is not contiguous");
TORCH_CHECK(b_q_weight.device().is_cuda(), "b_q_weight is not on GPU");
TORCH_CHECK(b_q_weight.is_contiguous(), "b_q_weight is not contiguous");
TORCH_CHECK(b_scales.device().is_cuda(), "b_scales is not on GPU");
TORCH_CHECK(b_scales.is_contiguous(), "b_scales is not contiguous");
TORCH_CHECK(g_idx.device().is_cuda(), "g_idx is not on GPU");
TORCH_CHECK(g_idx.is_contiguous(), "g_idx is not contiguous");
TORCH_CHECK(perm.device().is_cuda(), "perm is not on GPU");
TORCH_CHECK(perm.is_contiguous(), "perm is not contiguous");
// Alloc buffers
const at::cuda::OptionalCUDAGuard device_guard(device_of(a));
auto options = torch::TensorOptions().dtype(a.dtype()).device(a.device());
torch::Tensor c = torch::empty({size_m, size_n}, options);
torch::Tensor a_tmp = torch::empty({size_m, size_k}, options);
// thread_k: `k` size of a thread_tile in `weights` (can usually be left as
// auto -1)
int thread_k = -1;
// thread_n: `n` size of a thread_tile in `weights` (can usually be left as
// auto -1)
int thread_n = -1;
// sms: number of SMs to use for the kernel (can usually be left as auto -1)
int sms = -1;
// Verify g_idx and perm
TORCH_CHECK((g_idx.size(0) == 0 && perm.size(0) == 0) ||
(g_idx.size(0) == size_k && perm.size(0) == size_k),
"Unexpected g_idx.size(0) = ", g_idx.size(0),
" and perm.size(0) = ", perm.size(0),
", where size_k = ", size_k);
// Detect groupsize and act_order
int num_groups = -1;
int group_size = -1;
bool has_act_order = g_idx.size(0) != 0;
int b_rank = b_scales.sizes().size();
TORCH_CHECK(b_rank == 2, "b_scales rank = ", b_rank, " is not 2");
TORCH_CHECK(b_scales.size(1) == size_n, "b_scales dim 1 = ", b_scales.size(1),
" is not size_n = ", size_n);
num_groups = b_scales.size(0);
if (has_act_order) {
if (is_k_full) {
TORCH_CHECK(num_groups > 1, "For act_order, num_groups must be > 1");
TORCH_CHECK(size_k % num_groups == 0, "size_k = ", size_k,
", is not divisible by num_groups = ", num_groups);
group_size = size_k / num_groups;
} else {
group_size = 0;
}
} else {
if (num_groups > 1) {
TORCH_CHECK(
size_k % num_groups == 0, "size_k = ", size_k,
", is not divisible by b_scales.size(0) = ", b_scales.size(0));
group_size = size_k / num_groups;
} else {
group_size = -1;
}
}
// Verify workspace size
TORCH_CHECK(
size_n % gptq_marlin::min_thread_n == 0, "size_n = ", size_n,
", is not divisible by min_thread_n = ", gptq_marlin::min_thread_n);
int min_workspace_size =
(size_n / gptq_marlin::min_thread_n) * gptq_marlin::max_par;
TORCH_CHECK(workspace.numel() >= min_workspace_size,
"workspace.numel = ", workspace.numel(),
" is below min_workspace_size = ", min_workspace_size);
int dev = a.get_device();
gptq_marlin::marlin_mm_f16i4(
a.data_ptr(), b_q_weight.data_ptr(), c.data_ptr(), b_scales.data_ptr(),
g_idx.data_ptr(), perm.data_ptr(), a_tmp.data_ptr(), size_m, size_n,
size_k, workspace.data_ptr(), num_bits, has_act_order, is_k_full,
num_groups, group_size, dev, at::cuda::getCurrentCUDAStream(dev),
thread_k, thread_n, sms, gptq_marlin::max_par);
return c;
}
#endif
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