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Update flash_attention to version 2.0.1 #4323

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Update flash_attention to version 2.0.1 #4323

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12 changes: 6 additions & 6 deletions colossalai/kernel/cuda_native/flash_attention.py
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Original file line number Diff line number Diff line change
Expand Up @@ -190,9 +190,9 @@ def triton_cuda_check():
try:
from flash_attn.flash_attention import FlashAttention
from flash_attn.flash_attn_interface import (
flash_attn_unpadded_func,
flash_attn_unpadded_kvpacked_func,
flash_attn_unpadded_qkvpacked_func,
flash_attn_varlen_func,
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@kurisusnowdeng kurisusnowdeng Jul 25, 2023

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As commented in conversations

flash_attn_varlen_kvpacked_func,
flash_attn_varlen_qkvpacked_func,
)
HAS_FLASH_ATTN = True
except ImportError:
Expand Down Expand Up @@ -577,7 +577,7 @@ def flash_attention_qkv(qkv, sm_scale, batch_size, seq_len, dropout_p=0., causal
"""
max_s = seq_len
cu_seqlens = torch.arange(0, (batch_size + 1) * seq_len, step=seq_len, dtype=torch.int32, device=qkv.device)
out = flash_attn_unpadded_qkvpacked_func(qkv,
out = flash_attn_varlen_qkvpacked_func(qkv,
cu_seqlens,
max_s,
dropout_p,
Expand All @@ -604,7 +604,7 @@ def flash_attention_q_kv(q, kv, sm_scale, batch_size, q_seqlen, kv_seqlen, dropo
step=kv_seqlen,
dtype=torch.int32,
device=kv.device)
out = flash_attn_unpadded_kvpacked_func(q, kv, cu_seqlens_q, cu_seqlens_k, q_seqlen, kv_seqlen, dropout_p,
out = flash_attn_varlen_kvpacked_func(q, kv, cu_seqlens_q, cu_seqlens_k, q_seqlen, kv_seqlen, dropout_p,
sm_scale, causal)
return out

Expand All @@ -628,7 +628,7 @@ def flash_attention_q_k_v(q, k, v, sm_scale, batch_size, q_seqlen, kv_seqlen, dr
step=kv_seqlen,
dtype=torch.int32,
device=k.device)
return flash_attn_unpadded_func(q, k, v, cu_seqlens_q, cu_seqlens_kv, q_seqlen, kv_seqlen, dropout_p, sm_scale,
return flash_attn_varlen_func(q, k, v, cu_seqlens_q, cu_seqlens_kv, q_seqlen, kv_seqlen, dropout_p, sm_scale,
causal)


Expand Down
2 changes: 1 addition & 1 deletion requirements/requirements-test.txt
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Expand Up @@ -13,6 +13,6 @@ torchrec==0.2.0
contexttimer
einops
triton==2.0.0.dev20221202
git+https://github.com/HazyResearch/flash-attention.git@c422fee3776eb3ea24e011ef641fd5fbeb212623#egg=flash_attn
flash_attn==2.0.1
requests==2.27.1 # downgrade to avoid huggingface error https://github.com/huggingface/transformers/issues/17611
SentencePiece