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Commit bb35dc5b authored by Atream's avatar Atream
Browse files

init support for MLA using Attention kernel

parent 62011fd6
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Showing with 531 additions and 242 deletions
ktransformers/models/custom_cache.py
View file @ bb35dc5b
......@@ -51,13 +51,33 @@ class StaticCache(transformers.StaticCache):
cache_shape = (max_batch_size, self.num_key_value_heads, self.max_cache_len, self.head_dim)
if config.architectures[0] == "DeepseekV2ForCausalLM" or config.architectures[0] == "DeepseekV3ForCausalLM":
# TODO: for deepseek, cache_shape is different whether using Absorbed MLA, check it automatically
# key_shape = (max_batch_size, self.num_key_value_heads, self.max_cache_len, config.qk_rope_head_dim + config.qk_nope_head_dim)
# value_shape = (max_batch_size, self.num_key_value_heads, self.max_cache_len, config.v_head_dim)
key_shape = (max_batch_size, 1, self.max_cache_len, config.qk_rope_head_dim)
value_shape = (max_batch_size, 1, self.max_cache_len, config.kv_lora_rank)
self.page_size = 64
self.max_pages = (self.max_cache_len + self.page_size - 1) // self.page_size
key_shape = (self.max_pages, self.page_size, 1, config.qk_rope_head_dim)
value_shape = (self.max_pages, self.page_size, 1, config.kv_lora_rank)
# TODO: support real page table
self.page_table_map = dict()
self.page_table_list = []
for idx in range(config.num_hidden_layers):
if isinstance(device, dict):
target_device = device[f"blk.{idx}.self_attn"]["generate_device"]
else:
target_device = device
if target_device not in self.page_table_map:
page_table = torch.zeros((max_batch_size, self.max_pages), dtype=torch.int32, device=target_device)
for seq_id in range(max_batch_size):
page_table[seq_id, :] = torch.arange(seq_id * self.max_pages, seq_id * self.max_pages + self.max_pages, dtype=torch.int32, device=target_device)
self.page_table_map[target_device] = page_table
self.page_table_list.append(self.page_table_map[target_device])
self.is_MLA = True
self.is_page = True
else:
key_shape = cache_shape
value_shape = cache_shape
self.is_MLA = False
self.past_tokens = []
self.num_hidden_layers = config.num_hidden_layers
......@@ -104,10 +124,19 @@ class StaticCache(transformers.StaticCache):
cache_position = cache_kwargs.get("cache_position")
k_out = self.key_cache[layer_idx]
v_out = self.value_cache[layer_idx]
self.past_tokens[layer_idx] += cache_position.size(0)
#print(cache_position)
if self.is_MLA:
page_idx = cache_position // self.page_size
page_offset = cache_position % self.page_size
#print("page_idx", page_idx)
#print("page_offset", page_offset)
k_out[page_idx, page_offset, ...] = key_states
v_out[page_idx, page_offset, ...] = value_states
return k_out, v_out, self.page_table_list[layer_idx]
else:
k_out[:, :, cache_position] = key_states
v_out[:, :, cache_position] = value_states
self.past_tokens[layer_idx] += cache_position.size(0)
return k_out, v_out
def get_seq_length(self, layer_idx: Optional[int] = 0) -> int:
......
ktransformers/operators/attention.py
View file @ bb35dc5b
......@@ -21,9 +21,13 @@ from ktransformers.util.custom_gguf import GGUFLoader
import logging
from transformers.configuration_utils import PretrainedConfig
from transformers.cache_utils import Cache
from flash_attn import flash_attn_with_kvcache, flash_attn_func
from ktransformers.operators.triton_attention import decode_attention_fwd_grouped
logger = logging.getLogger("attention")
class KDeepseekV3Attention(BaseInjectedModule, DeepseekV3Attention):
# V3 MLA is same to V2
class KDeepseekV2Attention(BaseInjectedModule, DeepseekV2Attention):
"""Multi-headed attention from 'Attention Is All You Need' paper"""
attn_mask: Optional[torch.Tensor] = None
......@@ -39,7 +43,6 @@ class KDeepseekV3Attention(BaseInjectedModule, DeepseekV3Attention):
self.orig_module.__init__(orig_module.config,
orig_module.layer_idx)
self.chunck_size = chunck_size # TODO, generate chunck_size automatically.
self.softmax_scale = self.q_head_dim ** (-0.5)
def get_absorbed(self) -> Tuple[torch.Tensor, torch.Tensor]:
if not (hasattr(self, 'q_absorb') and hasattr(self, 'out_absorb')):
......@@ -52,7 +55,7 @@ class KDeepseekV3Attention(BaseInjectedModule, DeepseekV3Attention):
self.out_absorb = nn.Linear(self.kv_lora_rank, self.num_heads * self.v_head_dim,
bias=False, dtype=out_absorb.dtype, device=out_absorb.device)
self.out_absorb.weight.data = out_absorb
del self.orig_module.kv_b_proj
#del self.orig_module.kv_b_proj
q_absorb = self.q_absorb.weight.view(self.num_heads, self.qk_nope_head_dim, self.kv_lora_rank)
out_absorb = self.out_absorb.weight.view(self.num_heads, self.v_head_dim, self.kv_lora_rank)
return q_absorb, out_absorb
......@@ -96,7 +99,7 @@ class KDeepseekV3Attention(BaseInjectedModule, DeepseekV3Attention):
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
cos, sin = self.rotary_emb(q_pe, position_ids)
q_pe, k_pe = apply_rotary_pos_emb_v3(q_pe, k_pe, cos, sin)
q_pe, k_pe = apply_rotary_pos_emb(q_pe, k_pe, cos, sin)
if past_key_value is not None:
cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position} # Specific to RoPE models
......@@ -151,7 +154,7 @@ class KDeepseekV3Attention(BaseInjectedModule, DeepseekV3Attention):
attn_output = self.o_proj(attn_output)
return attn_output, attn_weights, past_key_value
return attn_output, None, past_key_value
def forward(
self,
......@@ -164,109 +167,9 @@ class KDeepseekV3Attention(BaseInjectedModule, DeepseekV3Attention):
cache_position: Optional[torch.LongTensor] = None,
**kwargs,
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
if "padding_mask" in kwargs:
warnings.warn(
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
)
bsz, q_len, _ = hidden_states.size()
if q_len <= self.chunck_size:
return self.forward_chunck(
hidden_states,
attention_mask,
position_ids,
past_key_value,
output_attentions,
use_cache,
cache_position,
**kwargs
)
assert output_attentions == False, "output_attentions is not supported when using chunked attention"
attn_output = None
attn_weight = None
cur_idx = 0
while cur_idx < q_len:
if attention_mask is not None:
chunk_mask = attention_mask[:, :, cur_idx:min(cur_idx + self.chunck_size, q_len), ...]
else:
# generate chunk_mask automatically.
self.attn_mask = \
torch.zeros(1, 1, self.chunck_size, past_key_value.max_cache_len, device=hidden_states.device) \
if self.attn_mask is None \
else self.attn_mask
self.attn_mask[:, :, :, cur_idx:min(cur_idx+self.chunck_size, past_key_value.max_cache_len)] = \
-1e+38 * torch.triu(torch.ones(self.chunck_size, self.chunck_size, device=hidden_states.device), diagonal=1)\
[:,:min(self.chunck_size, min(past_key_value.max_cache_len-cur_idx, self.chunck_size))]
self.attn_mask[:, :, :, cur_idx+self.chunck_size:] = -1e+38
self.attn_mask[:, :, :, :cur_idx] = 0
chunk_mask = torch.narrow(self.attn_mask, 2, 0, min(self.chunck_size, q_len-cur_idx))
cur_output, cur_attn_weight = self.forward_chunck(
hidden_states[:, cur_idx:min(cur_idx + self.chunck_size, q_len), ...],
chunk_mask,
position_ids[:, cur_idx:min(cur_idx + self.chunck_size, q_len)],
past_key_value,
output_attentions,
use_cache,
cache_position[cur_idx:min(cur_idx + self.chunck_size, q_len)],
**kwargs
)
cur_idx += self.chunck_size
if attn_output is None:
attn_output = cur_output
attn_weight = cur_attn_weight
else:
attn_output = torch.cat((attn_output, cur_output), dim=-2)
attn_weight = torch.cat((attn_weight, cur_attn_weight), dim=-2)
return attn_output, attn_weight, past_key_value
class KDeepseekV2Attention(BaseInjectedModule, DeepseekV2Attention):
"""Multi-headed attention from 'Attention Is All You Need' paper"""
attn_mask: Optional[torch.Tensor] = None
def __init__(self,
key: str,
gguf_loader : GGUFLoader,
config: PretrainedConfig,
orig_module: nn.Module,
device: str = "cuda",
chunck_size: int = 1000,
**kwargs):
BaseInjectedModule.__init__(self, key, gguf_loader, config, orig_module, device, **kwargs)
self.orig_module.__init__(orig_module.config,
orig_module.layer_idx)
self.chunck_size = chunck_size # TODO, generate chunck_size automatically.
def get_absorbed(self) -> Tuple[torch.Tensor, torch.Tensor]:
if not (hasattr(self, 'q_absorb') and hasattr(self, 'out_absorb')):
kv_b_proj = self.kv_b_proj.weight.view(self.num_heads, -1, self.kv_lora_rank)
q_absorb = kv_b_proj[:, :self.qk_nope_head_dim, :].reshape(-1, self.kv_lora_rank)
out_absorb = kv_b_proj[:, self.qk_nope_head_dim:, :].reshape(-1, self.kv_lora_rank)
self.q_absorb = nn.Linear(self.kv_lora_rank, self.num_heads * self.qk_nope_head_dim,
bias=False, dtype=q_absorb.dtype, device=q_absorb.device)
self.q_absorb.weight.data = q_absorb
self.out_absorb = nn.Linear(self.kv_lora_rank, self.num_heads * self.v_head_dim,
bias=False, dtype=out_absorb.dtype, device=out_absorb.device)
self.out_absorb.weight.data = out_absorb
del self.orig_module.kv_b_proj
q_absorb = self.q_absorb.weight.view(self.num_heads, self.qk_nope_head_dim, self.kv_lora_rank)
out_absorb = self.out_absorb.weight.view(self.num_heads, self.v_head_dim, self.kv_lora_rank)
return q_absorb, out_absorb
def forward_chunck(
self,
hidden_states: torch.Tensor,
attention_mask: Optional[torch.Tensor] = None,
position_ids: Optional[torch.LongTensor] = None,
past_key_value: Optional[Cache] = None,
output_attentions: bool = False,
use_cache: bool = False,
cache_position: Optional[torch.LongTensor] = None,
**kwargs
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
bsz, q_len, _ = hidden_states.size()
if self.q_lora_rank is None:
q = self.q_proj(hidden_states)
else:
......@@ -282,140 +185,111 @@ class KDeepseekV2Attention(BaseInjectedModule, DeepseekV2Attention):
)
compressed_kv = self.kv_a_layernorm(compressed_kv)
k_pe = k_pe.view(bsz, q_len, 1, self.qk_rope_head_dim).transpose(1, 2)
kv_seq_len = k_pe.shape[-2]
if past_key_value is not None:
if self.layer_idx is None:
raise ValueError(
f"The cache structure has changed since version v4.36. If you are using {self.__class__.__name__} "
"for auto-regressive decoding with k/v caching, please make sure to initialize the attention class "
"with a layer index."
)
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
compressed_kv = compressed_kv.view(bsz, q_len, 1, self.kv_lora_rank)
cos, sin = self.rotary_emb(q_pe, position_ids)
q_pe, k_pe = apply_rotary_pos_emb(q_pe, k_pe, cos, sin)
k_pe = k_pe.transpose(1, 2) # [bsz, q_len, 1, self.qk_rope_head_dim]
# decode
if q_len == 1:
if past_key_value is not None:
cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position} # Specific to RoPE models
compressed_kv = compressed_kv.unsqueeze(1)
k_pe, compressed_kv = past_key_value.update(k_pe, compressed_kv, self.layer_idx, cache_kwargs)
compressed_kv = compressed_kv.squeeze(1)
#if cache_position is not None:
# compressed_kv = compressed_kv[:,: cache_position[-1] + 1,:]
# k_pe = k_pe[:,:,: cache_position[-1] + 1,:]
q_absorb, out_absorb = self.get_absorbed()
k_pe, compressed_kv, page_table = past_key_value.update(k_pe, compressed_kv, self.layer_idx, cache_kwargs)
q_nope = torch.matmul(q_nope, q_absorb)
attn_weights = (torch.matmul(q_pe, k_pe.mT) + torch.matmul(q_nope, compressed_kv.unsqueeze(-3).mT)) * self.softmax_scale
"""
if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
raise ValueError(
f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
f" {attn_weights.size()}"
# q_nope [bsz, self.num_heads, q_len, self.qk_nope_head_dim]
# q_absorb [self.num_heads, self.qk_nope_head_dim, self.kv_lora_rank]
q_absorb, out_absorb = self.get_absorbed()
q_nope = torch.matmul(q_nope, q_absorb) # batched MM
# q_nope [bsz, self.num_heads, q_len, self.kv_lora_rank]
# q_pe [bsz, self.num_heads, q_len, self.qk_rope_head_dim]
query_states = torch.cat([q_nope, q_pe], dim=-1)
# k_pe [bsz, q_len, 1, self.qk_rope_head_dim]
# compressed_kv [bsz, q_len, 1, self.kv_lora_rank]
key_states = torch.cat([compressed_kv, k_pe], dim=-1)
query_states = query_states.squeeze(2)
attn_output = torch.zeros_like(q_nope)
attn_logits = torch.empty(
(
bsz,
self.num_heads,
1, #num_kv_splits # follow vLLM, fix it TODO
self.kv_lora_rank + 1,
),
dtype=torch.float32,
device = attn_output.device
)
assert attention_mask is not None
"""
if attention_mask is not None:
print("query_states", torch.isnan(query_states).any())
print("key_states", torch.isnan(key_states[:,:,0,:]).any())
print("compressed_kv", torch.isnan(compressed_kv[:,:,0,:]).any())
print("position_ids", torch.isnan(position_ids).any())
"""
if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
raise ValueError(
f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
)
"""
#causal_mask = attention_mask[:, :, :, : kv_seq_len]
attn_weights = attn_weights + attention_mask
# upcast attention to fp32
attn_weights = nn.functional.softmax(
attn_weights, dim=-1, dtype=torch.float32
).to(q_pe.dtype)
attn_weights = nn.functional.dropout(
attn_weights, p=self.attention_dropout, training=self.training
)
attn_output = torch.einsum('bhql,blc->bhqc', attn_weights, compressed_kv)
# flash attn doesn't support head_dim bigger than 256
# use vLLM triton attention kernel for MQA
decode_attention_fwd_grouped(query_states, key_states, compressed_kv, attn_output,
page_table,
position_ids.squeeze(0).to(torch.int32), attn_logits,
1, #num_kv_splits # follow vLLM, fix it TODO
self.softmax_scale,
past_key_value.page_size)
attn_output = torch.matmul(attn_output, out_absorb.mT)
if attn_output.size() != (bsz, self.num_heads, q_len, self.v_head_dim):
raise ValueError(
f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.v_head_dim)}, but is"
f" {attn_output.size()}"
)
attn_output = attn_output.transpose(1, 2).contiguous()
attn_output = attn_output.reshape(bsz, q_len, self.num_heads * self.v_head_dim)
attn_output = self.o_proj(attn_output)
#print("attn_output", torch.isnan(attn_output).any())
return attn_output, None, past_key_value
def forward(
self,
hidden_states: torch.Tensor,
attention_mask: Optional[torch.Tensor] = None,
position_ids: Optional[torch.LongTensor] = None,
past_key_value: Optional[Cache] = None,
output_attentions: bool = False,
use_cache: bool = False,
cache_position: Optional[torch.LongTensor] = None,
**kwargs,
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
if "padding_mask" in kwargs:
warnings.warn(
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
else:
if past_key_value is not None:
cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position} # Specific to RoPE models
k_pe.squeeze(0)
compressed_kv.squeeze(0)
past_key_value.update(k_pe, compressed_kv, self.layer_idx, cache_kwargs)
k_pe.unsqueeze(0)
compressed_kv.unsqueeze(0)
k_pe = k_pe[:, :q_len]
compressed_kv = compressed_kv[:, :q_len]
kv = (
self.kv_b_proj(compressed_kv)
.view(bsz, q_len, self.num_heads, self.qk_nope_head_dim + self.v_head_dim)
)
bsz, q_len, _ = hidden_states.size()
if q_len <= self.chunck_size:
return self.forward_chunck(
hidden_states,
attention_mask,
position_ids,
past_key_value,
output_attentions,
use_cache,
cache_position,
**kwargs
k_nope, value_states = torch.split(kv, [self.qk_nope_head_dim, self.v_head_dim], dim=-1)
query_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
query_states[:, :, :, : self.qk_nope_head_dim] = q_nope
query_states[:, :, :, self.qk_nope_head_dim :] = q_pe
key_states = k_pe.new_empty(bsz, q_len, self.num_heads, self.q_head_dim)
key_states[:, :, :, :self.qk_nope_head_dim] = k_nope
key_states[:, :, :, self.qk_nope_head_dim:] = k_pe
query_states = query_states.transpose(1, 2)
value_states = value_states.view(bsz, q_len, self.num_heads, self.v_head_dim)
value_states_padded = torch.nn.functional.pad(value_states, [0, query_states.shape[-1] - value_states.shape[-1]], value=0)
attn_output = flash_attn_func(
query_states,
key_states,
value_states_padded,
softmax_scale=self.softmax_scale,
causal=True,
)
assert output_attentions == False, "output_attentions is not supported when using chunked attention"
attn_output = None
cur_idx = 0
while cur_idx < q_len:
if attention_mask is not None:
chunk_mask = attention_mask[:, :, cur_idx:min(cur_idx + self.chunck_size, q_len), ...]
else:
# generate chunk_mask automatically.
self.attn_mask = \
torch.zeros(1, 1, self.chunck_size, past_key_value.max_cache_len, device=hidden_states.device) \
if self.attn_mask is None \
else self.attn_mask
self.attn_mask[:, :, :, cur_idx:min(cur_idx+self.chunck_size, past_key_value.max_cache_len)] = \
-1e+38 * torch.triu(torch.ones(self.chunck_size, self.chunck_size, device=hidden_states.device), diagonal=1)\
[:,:min(self.chunck_size, min(past_key_value.max_cache_len-cur_idx, self.chunck_size))]
self.attn_mask[:, :, :, cur_idx+self.chunck_size:] = -1e+38
self.attn_mask[:, :, :, :cur_idx] = 0
chunk_mask = torch.narrow(self.attn_mask, 2, 0, min(self.chunck_size, q_len-cur_idx))
cur_output, _, _ = self.forward_chunck(
hidden_states[:, cur_idx:min(cur_idx + self.chunck_size, q_len), ...],
chunk_mask,
position_ids[:, cur_idx:min(cur_idx + self.chunck_size, q_len)],
past_key_value,
output_attentions,
use_cache,
cache_position[cur_idx:min(cur_idx + self.chunck_size, q_len)],
**kwargs
)
cur_idx += self.chunck_size
if attn_output is None:
attn_output = cur_output
else:
attn_output = torch.cat((attn_output, cur_output), dim=-2)
if self.q_head_dim != self.v_head_dim:
attn_output = attn_output[:, :, :, : self.v_head_dim]
attn_output = attn_output.reshape(
bsz, q_len, self.num_heads * self.v_head_dim
).contiguous()
attn_output = self.o_proj(attn_output)
return attn_output, None, past_key_value
def rotate_half(x):
"""Rotates half the hidden dims of the input."""
x1 = x[..., : x.shape[-1] // 2]
......@@ -423,8 +297,6 @@ def rotate_half(x):
return torch.cat((-x2, x1), dim=-1)
class KLlamaAttention(BaseInjectedModule):
"""Multi-headed attention from 'Attention Is All You Need' paper"""
......
ktransformers/operators/triton_attention.py 0 → 100644
View file @ bb35dc5b
import triton
import triton.language as tl
@triton.jit
def tanh(x):
# Tanh is just a scaled sigmoid
return 2 * tl.sigmoid(2 * x) - 1
@triton.jit
def _fwd_grouped_kernel_stage1(
Q,
K_Buffer,
V_Buffer,
sm_scale,
Req_to_tokens,
B_Seqlen,
Att_Out,
stride_req_to_tokens_b,
stride_qbs,
stride_qh,
stride_buf_kbs,
stride_buf_kh,
stride_buf_vbs,
stride_buf_vh,
stride_mid_ob,
stride_mid_oh,
stride_mid_os,
kv_group_num: tl.constexpr,
q_head_num: tl.constexpr,
BLOCK_DMODEL: tl.constexpr,
BLOCK_DPE: tl.constexpr,
BLOCK_DV: tl.constexpr,
BLOCK_N: tl.constexpr,
BLOCK_H: tl.constexpr,
NUM_KV_SPLITS: tl.constexpr,
PAGE_SIZE: tl.constexpr,
logit_cap: tl.constexpr,
Lk: tl.constexpr,
Lv: tl.constexpr,
):
cur_batch = tl.program_id(0)
cur_head_id = tl.program_id(1)
cur_kv_head = cur_head_id // tl.cdiv(kv_group_num, BLOCK_H)
split_kv_id = tl.program_id(2)
if kv_group_num > BLOCK_H:
VALID_BLOCK_H: tl.constexpr = BLOCK_H
else:
VALID_BLOCK_H: tl.constexpr = kv_group_num
cur_head = cur_head_id * VALID_BLOCK_H + tl.arange(0, BLOCK_H)
mask_h = cur_head < (cur_head_id + 1) * VALID_BLOCK_H
mask_h = mask_h & (cur_head < q_head_num)
offs_d = tl.arange(0, BLOCK_DMODEL)
offs_dv = tl.arange(0, BLOCK_DV)
mask_d = offs_d < Lk
mask_dv = offs_dv < Lv
cur_batch_seq_len = tl.load(B_Seqlen + cur_batch)
cur_batch_req_idx = cur_batch
offs_q = cur_batch * stride_qbs + cur_head[:, None] * stride_qh + offs_d[
None, :]
q = tl.load(Q + offs_q,
mask=(mask_h[:, None]) & (mask_d[None, :]),
other=0.0)
if BLOCK_DPE > 0:
offs_dpe = BLOCK_DMODEL + tl.arange(0, BLOCK_DPE)
mask_dpe = offs_dpe < Lk
off_qpe = (cur_batch * stride_qbs + cur_head[:, None] * stride_qh +
offs_dpe[None, :])
qpe = tl.load(Q + off_qpe,
mask=(mask_h[:, None]) & (mask_dpe[None, :]),
other=0.0)
kv_len_per_split = tl.cdiv(cur_batch_seq_len, NUM_KV_SPLITS)
split_kv_start = kv_len_per_split * split_kv_id
split_kv_end = tl.minimum(split_kv_start + kv_len_per_split,
cur_batch_seq_len)
e_max = tl.zeros([BLOCK_H], dtype=tl.float32) - float("inf")
e_sum = tl.zeros([BLOCK_H], dtype=tl.float32)
acc = tl.zeros([BLOCK_H, BLOCK_DV], dtype=tl.float32)
if split_kv_end > split_kv_start:
for start_n in range(split_kv_start, split_kv_end, BLOCK_N):
offs_n = start_n + tl.arange(0, BLOCK_N)
kv_page_number = tl.load(
Req_to_tokens + stride_req_to_tokens_b * cur_batch_req_idx +
offs_n // PAGE_SIZE,
mask=offs_n < split_kv_end,
other=0,
)
kv_loc = kv_page_number * PAGE_SIZE + offs_n % PAGE_SIZE
offs_buf_k = (kv_loc[None, :] * stride_buf_kbs +
cur_kv_head * stride_buf_kh + offs_d[:, None])
k = tl.load(
K_Buffer + offs_buf_k,
mask=(offs_n[None, :] < split_kv_end) & (mask_d[:, None]),
other=0.0,
)
qk = tl.dot(q, k.to(q.dtype))
if BLOCK_DPE > 0:
offs_buf_kpe = (kv_loc[None, :] * stride_buf_kbs +
cur_kv_head * stride_buf_kh +
offs_dpe[:, None])
kpe = tl.load(
K_Buffer + offs_buf_kpe,
mask=(offs_n[None, :] < split_kv_end) &
(mask_dpe[:, None]),
other=0.0,
)
qk += tl.dot(qpe, kpe.to(qpe.dtype))
qk *= sm_scale
if logit_cap > 0:
qk = logit_cap * tanh(qk / logit_cap)
qk = tl.where(mask_h[:, None] & (offs_n[None, :] < split_kv_end),
qk, float("-inf"))
offs_buf_v = (kv_loc[:, None] * stride_buf_vbs +
cur_kv_head * stride_buf_vh + offs_dv[None, :])
v = tl.load(
V_Buffer + offs_buf_v,
mask=(offs_n[:, None] < split_kv_end) & (mask_dv[None, :]),
other=0.0,
)
n_e_max = tl.maximum(tl.max(qk, 1), e_max)
re_scale = tl.exp(e_max - n_e_max)
p = tl.exp(qk - n_e_max[:, None])
acc *= re_scale[:, None]
acc += tl.dot(p.to(v.dtype), v)
e_sum = e_sum * re_scale + tl.sum(p, 1)
e_max = n_e_max
offs_mid_o = (cur_batch * stride_mid_ob +
cur_head[:, None] * stride_mid_oh +
split_kv_id * stride_mid_os + offs_dv[None, :])
tl.store(
Att_Out + offs_mid_o,
acc / e_sum[:, None],
mask=(mask_h[:, None]) & (mask_dv[None, :]),
)
offs_mid_o_1 = (cur_batch * stride_mid_ob + cur_head * stride_mid_oh +
split_kv_id * stride_mid_os + Lv)
tl.store(
Att_Out + offs_mid_o_1,
e_max + tl.log(e_sum),
mask=mask_h,
)
def _decode_grouped_att_m_fwd(
q,
k_buffer,
v_buffer,
att_out,
Req_to_tokens,
B_Seqlen,
num_kv_splits,
sm_scale,
page_size,
logit_cap,
):
BLOCK = 32
Lk = k_buffer.shape[-1]
Lv = v_buffer.shape[-1]
# [TODO] work around shmem limit on MI3xx
# TODO: support hip
#if is_hip_ and Lk >= 576:
# BLOCK = 16
if Lk == 576:
BLOCK_DMODEL = 512
BLOCK_DPE = 64
elif Lk == 288:
BLOCK_DMODEL = 256
BLOCK_DPE = 32
else:
BLOCK_DMODEL = triton.next_power_of_2(Lk)
BLOCK_DPE = 0
BLOCK_DV = triton.next_power_of_2(Lv)
batch, head_num = q.shape[0], q.shape[1]
kv_group_num = q.shape[1] // k_buffer.shape[-2]
BLOCK_H = 16
NUM_KV_SPLITS = num_kv_splits
grid = (
batch,
triton.cdiv(head_num, min(BLOCK_H, kv_group_num)),
NUM_KV_SPLITS,
)
extra_kargs = {}
# TODO: support hip
"""
if is_hip_:
# https://rocm.docs.amd.com/en/docs-6.2.0/how-to/llm-fine-tuning-optimization/optimizing-triton-kernel.html
# https://github.com/triton-lang/triton/blob/main/third_party/amd/backend/compiler.py
extra_kargs = {
"waves_per_eu": 4,
"matrix_instr_nonkdim": 16,
"kpack": 2
}
"""
_fwd_grouped_kernel_stage1[grid](
q,
k_buffer,
v_buffer,
sm_scale,
Req_to_tokens,
B_Seqlen,
att_out,
Req_to_tokens.stride(0),
q.stride(0),
q.stride(1),
k_buffer.stride(-3), # Assume (..., PAGE_SIZE, NUM_HEADS, HEAD_DIM)
k_buffer.stride(-2), # Assume (..., PAGE_SIZE, NUM_HEADS, HEAD_DIM)
v_buffer.stride(-3), # Assume (..., PAGE_SIZE, NUM_HEADS, HEAD_DIM)
v_buffer.stride(-2), # Assume (..., PAGE_SIZE, NUM_HEADS, HEAD_DIM)
att_out.stride(0),
att_out.stride(1),
att_out.stride(2),
kv_group_num=kv_group_num,
q_head_num=head_num,
BLOCK_DMODEL=BLOCK_DMODEL,
BLOCK_DPE=BLOCK_DPE,
BLOCK_DV=BLOCK_DV,
BLOCK_N=BLOCK,
BLOCK_H=BLOCK_H,
NUM_KV_SPLITS=NUM_KV_SPLITS,
PAGE_SIZE=page_size,
logit_cap=logit_cap,
num_warps=4,
num_stages=2,
Lk=Lk,
Lv=Lv,
**extra_kargs,
)
@triton.jit
def _fwd_kernel_stage2(
Mid_O,
o,
B_Seqlen,
stride_mid_ob,
stride_mid_oh,
stride_mid_os,
stride_obs,
stride_oh,
NUM_KV_SPLITS: tl.constexpr,
BLOCK_DV: tl.constexpr,
Lv: tl.constexpr,
):
cur_batch = tl.program_id(0)
cur_head = tl.program_id(1)
cur_batch_seq_len = tl.load(B_Seqlen + cur_batch)
offs_d = tl.arange(0, BLOCK_DV)
mask_d = offs_d < Lv
e_sum = 0.0
e_max = -float("inf")
acc = tl.zeros([BLOCK_DV], dtype=tl.float32)
offs_v = cur_batch * stride_mid_ob + cur_head * stride_mid_oh + offs_d
offs_logic = cur_batch * stride_mid_ob + cur_head * stride_mid_oh + Lv
for split_kv_id in range(0, NUM_KV_SPLITS):
kv_len_per_split = tl.cdiv(cur_batch_seq_len, NUM_KV_SPLITS)
split_kv_start = kv_len_per_split * split_kv_id
split_kv_end = tl.minimum(split_kv_start + kv_len_per_split,
cur_batch_seq_len)
if split_kv_end > split_kv_start:
tv = tl.load(Mid_O + offs_v + split_kv_id * stride_mid_os,
mask=mask_d,
other=0.0)
tlogic = tl.load(Mid_O + offs_logic + split_kv_id * stride_mid_os)
n_e_max = tl.maximum(tlogic, e_max)
old_scale = tl.exp(e_max - n_e_max)
acc *= old_scale
exp_logic = tl.exp(tlogic - n_e_max)
acc += exp_logic * tv
e_sum = e_sum * old_scale + exp_logic
e_max = n_e_max
tl.store(
o + cur_batch * stride_obs + cur_head * stride_oh + offs_d,
acc / e_sum,
mask=mask_d,
)
def _decode_softmax_reducev_fwd(
logits,
q,
o,
v_buffer,
b_seq_len,
num_kv_splits,
):
batch, head_num = q.shape[0], q.shape[1]
Lv = v_buffer.shape[-1]
BLOCK_DV = triton.next_power_of_2(Lv)
NUM_KV_SPLITS = num_kv_splits
extra_kargs = {}
# TODO: support hip
"""
if is_hip_:
# https://rocm.docs.amd.com/en/docs-6.2.0/how-to/llm-fine-tuning-optimization/optimizing-triton-kernel.html
# https://github.com/triton-lang/triton/blob/main/third_party/amd/backend/compiler.py
extra_kargs = {
"waves_per_eu": 4,
"matrix_instr_nonkdim": 16,
"kpack": 2
}
"""
grid = (batch, head_num)
_fwd_kernel_stage2[grid](
logits,
o,
b_seq_len,
logits.stride(0),
logits.stride(1),
logits.stride(2),
o.stride(0),
o.stride(1),
NUM_KV_SPLITS=NUM_KV_SPLITS,
BLOCK_DV=BLOCK_DV,
Lv=Lv,
num_warps=4,
num_stages=2,
**extra_kargs,
)
def decode_attention_fwd_grouped(
q,
k_buffer,
v_buffer,
o,
req_to_token,
b_seq_len,
attn_logits,
num_kv_splits,
sm_scale,
page_size,
logit_cap=0.0,
):
_decode_grouped_att_m_fwd(
q,
k_buffer,
v_buffer,
attn_logits,
req_to_token,
b_seq_len,
num_kv_splits,
sm_scale,
page_size,
logit_cap,
)
_decode_softmax_reducev_fwd(attn_logits, q, o, v_buffer, b_seq_len,
num_kv_splits)
\ No newline at end of file
ktransformers/util/utils.py
View file @ bb35dc5b
......@@ -133,7 +133,7 @@ def prefill_and_generate(model, tokenizer, inputs, max_new_tokens=10000, use_cud
)
else:
past_key_values = None
cache_position = torch.arange(seq_length, device=torch_device)
cache_position = torch.arange(seq_length, device=torch_device, dtype=torch.long)
generated_ids = torch.zeros(
batch_size, seq_length + max_new_tokens + 1, dtype=torch.int, device=torch_device
)
......@@ -178,7 +178,7 @@ def prefill_and_generate(model, tokenizer, inputs, max_new_tokens=10000, use_cud
generated_ids[:, seq_length] = next_token
tokens.append(int(next_token))
inputs = torch.cat((inputs, next_token.unsqueeze(0)), dim=-1)
cache_position = torch.tensor([seq_length], device=torch_device)
cache_position = torch.tensor([seq_length], device=torch_device, dtype=torch.long)
position_ids = cache_position.unsqueeze(0)
seq_length += 1
......
test_prompt.txt 0 → 100644
View file @ bb35dc5b
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