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MErkinSag authored Oct 25, 2024
1 parent 7deb217 commit e0ff08c
Showing 1 changed file with 4 additions and 2 deletions.
6 changes: 4 additions & 2 deletions vllm/attention/backends/rocm_flash_attn.py
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,8 @@
_PARTITION_SIZE_ROCM = 512
_GPU_ARCH = torch.cuda.get_device_properties("cuda").gcnArchName
_ON_NAVI = "gfx1" in _GPU_ARCH
_ON_MI250_MI300 = any(arch in _GPU_ARCH for arch in ["gfx90a", "gfx940", "gfx941", "gfx942"])
_ON_MI250_MI300 = any(arch in _GPU_ARCH
for arch in ["gfx90a", "gfx940", "gfx941", "gfx942"])

class ROCmFlashAttentionBackend(AttentionBackend):

Expand Down Expand Up @@ -663,7 +664,8 @@ def _use_rocm_custom_paged_attention(qtype: torch.dtype, head_size: int,
block_size: int, gqa_ratio: int,
max_seq_len: int) -> bool:
# rocm custom page attention not support on navi (gfx1*)
return (_ON_MI250_MI300 and not _ON_NAVI and (qtype == torch.half or qtype == torch.bfloat16)
return (_ON_MI250_MI300 and not _ON_NAVI
and (qtype == torch.half or qtype == torch.bfloat16)
and (head_size == 64 or head_size == 128)
and (block_size == 16 or block_size == 32)
and (gqa_ratio >= 1 and gqa_ratio <= 16) and max_seq_len <= 32768)

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