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[Perf][DSV4] Optimize sparse top-k metadata kernels for higher prefill throughput #52084

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chaunceyjiang merged 2 commits into from
Aug 16, 2026
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[Perf][DSV4] Optimize sparse top-k metadata kernels for higher prefill throughput #52084

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[DSV4] Optimize sparse top-k metadata kernels for higher prefill thro…
chaunceyjiang Aug 13, 2026
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[DSV4] Optimize sparse top-k metadata kernels for higher prefill thro…
chaunceyjiang Aug 16, 2026
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2 changes: 1 addition & 1 deletion vllm/models/deepseek_v4/common/ops/cache_utils.py
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Expand Up @@ -580,7 +580,7 @@ def combine_topk_swa_indices(
return combined_indices, combined_lens


_COMBINE_TOPK_SWA_NUM_WORKERS = 128
_COMBINE_TOPK_SWA_NUM_WORKERS = 256


# Representative pointer alignment variants for Triton pointer specialization.
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