[Bugfix] fix pcp qwen full graph FIA bug#6037
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wangxiyuan merged 1 commit intovllm-project:mainfrom Jan 21, 2026
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This pull request addresses a bug in update_attn_dcp_pcp_params related to handling actual_seq_lengths_q in pcp/dcp attention scenarios. The previous implementation incorrectly sliced and padded this list, which would cause issues in mixed prefill/decode batches and could raise an IndexError with prefill-only batches. The fix removes this logic, aligning the function with others like _update_attn_fia_params, under the assumption that attn_metadata.actual_seq_lengths_q already has the correct length corresponding to runtime_shape. This change is a clear improvement for correctness and robustness.
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Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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### What this PR does / why we need it? [releases/v0.13.0] In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. PR for main branch: #6037 ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? vLLM version: v0.13.0 Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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…to FIA_rebase * 'main' of https://github.com/vllm-project/vllm-ascend: (24 commits) add dispath_ffn_combine_bf16 (vllm-project#5866) [BugFix] Fix input parameter bug of dispatch_gmm_combine_decode[RFC: issue 5476] (vllm-project#5932) [1/N][Feat] Xlite Qwen3 MoE Support (vllm-project#5951) [Bugfix] Fix setting of `speculative_config.enforce_eager` for dsv32 (vllm-project#5945) [bugfix][mm] change get_num_encoder_tokens to get_num_encoder_embeds in recompute_schedule.py (vllm-project#5132) [Bugfix] fix pcp qwen full graph FIA bug (vllm-project#6037) [Bugfix]Fixed precision issues caused by pooled request pooling (vllm-project#6049) 【main】【bugfix】Resolved memory deallocation failure in the pooling layer under re-computation workloads. (vllm-project#6045) [main][Bugfix] Fixed an problem related to embeddings sharing (vllm-project#5967) [Feature]refactor the npugraph_ex config, support online-infer with static kernel (vllm-project#5775) [CI][Lint] Show lint diff on failure (vllm-project#5956) [CI] Add wait logic for each individual case (vllm-project#6036) [CI] Add DeepSeek-V3.2-W8A8 nightly ci test (vllm-project#4633) model runner v2 support triton of penalty (vllm-project#5854) [Docs][Model] Support Qwen3-VL-Embedding & Qwen3-VL-Reranker (vllm-project#6034) [Tests] move qwen3 performance test from nightly to e2e (vllm-project#5980) [Bugfix] fix bug of pcp+mtp+async scheduler (vllm-project#5994) [Main2Main] Upgrade vllm commit to releases/v0.14.0 (vllm-project#5988) [Ops] Add layernorm for qwen3Next (vllm-project#5765) [Doc] Add layer_sharding additional config for DeepSeek-V3.2-W8A8 (vllm-project#5921) ...
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### What this PR does / why we need it? In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? - vLLM version: v0.13.0 - vLLM main: vllm-project/vllm@2c24bc6 Signed-off-by: weiguihua2 <weiguihua2@huawei.com> Signed-off-by: huangning1995 <huangning12@huawei.com>
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This reverts commit c12791c.
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### What this PR does / why we need it? In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? - vLLM version: v0.13.0 - vLLM main: vllm-project/vllm@2c24bc6 Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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### What this PR does / why we need it? [releases/v0.13.0] In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. PR for main branch: vllm-project#6037 ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? vLLM version: v0.13.0 Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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### What this PR does / why we need it? [releases/v0.13.0] In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. PR for main branch: vllm-project#6037 ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? vLLM version: v0.13.0 Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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### What this PR does / why we need it? [releases/v0.13.0] In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. PR for main branch: vllm-project#6037 ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? vLLM version: v0.13.0 Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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### What this PR does / why we need it? In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? - vLLM version: v0.13.0 - vLLM main: vllm-project/vllm@2c24bc6 Signed-off-by: weiguihua2 <weiguihua2@huawei.com> Signed-off-by: zrj026 <zhangrunjiang026@gmail.com>
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### What this PR does / why we need it? In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? - vLLM version: v0.13.0 - vLLM main: vllm-project/vllm@2c24bc6 Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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### What this PR does / why we need it? In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? - vLLM version: v0.13.0 - vLLM main: vllm-project/vllm@2c24bc6 Signed-off-by: weiguihua2 <weiguihua2@huawei.com> Signed-off-by: zrj026 <zhangrunjiang026@gmail.com>
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### What this PR does / why we need it? In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? - vLLM version: v0.13.0 - vLLM main: vllm-project/vllm@2c24bc6 Signed-off-by: weiguihua2 <weiguihua2@huawei.com>
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What this PR does / why we need it?
In the pcp full graph Qwen model scenario, the inconsistency between the Q shape and actual q len of the FIA operator is fixed.
Does this PR introduce any user-facing change?
No
How was this patch tested?