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[rocm][V0] fix selection logic for custom PA in V0 #16426

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Merged
merged 2 commits into from
Apr 17, 2025
Merged

[rocm][V0] fix selection logic for custom PA in V0 #16426

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545cd06
enable custom PA for V0
divakar-amd Apr 10, 2025
8e4add0
add comment for paged attn logic
divakar-amd Apr 14, 2025
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3 changes: 2 additions & 1 deletion vllm/platforms/rocm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,8 @@ def use_rocm_custom_paged_attention(qtype: torch.dtype, head_size: int,

# rocm custom page attention not support on navi (gfx1*)
return (ON_MI250_MI300 and not ON_NAVI
and (sliding_window == 0 or sliding_window == (-1, -1))
and (not envs.VLLM_USE_V1 or sliding_window == 0
or sliding_window == (-1, -1))
Comment on lines +115 to +116
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@ProExpertProg ProExpertProg Apr 13, 2025

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Do you mind adding a comment here? Something like: "custom paged attn always supported on V0, only [with(out)...] sliding window on V1" - where the [...] is a short description of why the sliding window checks are there

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@divakar-amd divakar-amd Apr 14, 2025

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Done

and (qtype == torch.half or qtype == torch.bfloat16)
and (head_size == 64 or head_size == 128)
and (block_size == 16 or block_size == 32)
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