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[BugFix] Xlite: Bypass the padding of the graph mode in non-MTP cases to obtain the correct decode num. #5711

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Merged
wangxiyuan merged 1 commit into from
Jan 9, 2026
Merged

[BugFix] Xlite: Bypass the padding of the graph mode in non-MTP cases to obtain the correct decode num. #5711

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15 changes: 11 additions & 4 deletions vllm_ascend/xlite/xlite.py
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Original file line number Diff line number Diff line change
Expand Up @@ -255,7 +255,14 @@ def __call__(
]

if not with_prefill or self.full_mode:
batch = attn_metadata.num_prefills + attn_metadata.num_decodes
# TODO: When vllm_ascend enables graph mode, attn_metadata.num_decodes
# will be padded in decode requests. Therefore, it is first fixed using
# num_decode_tokens. However, in the future, when MTP is enabled, there
# may be cases where a single request involves multiple tokens, which
# will need to be solved.
num_decodes = attn_metadata.num_decode_tokens
num_prefills = attn_metadata.num_prefills
batch = num_prefills + num_decodes
seq_lens = attn_metadata.seq_lens[:batch]
seq_tensor = torch.cat([
torch.tensor([0]),
Expand All @@ -269,9 +276,9 @@ def __call__(
xlite_attn_metadata = ModelAttnMeta()
xlite_attn_metadata.lens = query_lens.tolist()
xlite_attn_metadata.cached_lens = cached_lens.tolist()
xlite_attn_metadata.is_prefills = [
False
] * attn_metadata.num_decodes + [True] * attn_metadata.num_prefills
xlite_attn_metadata.is_prefills = [False] * num_decodes + [
True
] * num_prefills
xlite_attn_metadata.block_tables = attn_metadata.block_tables.cpu(
).tolist()

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