Author

Si-Ran Liu

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Review Sep 2026

Sample-Guided Exact Top-K Selection for Long-Context Sparse Attention

HPC-Ops Top-K is presented, a sample-guided exact selector for ragged sparse-attention score rows that outperforms the fastest verified external exact baseline and outperforms the fastest verified external exact baseline on indexer scores from Hy4-Preview.

Si-Ran Liu, Ya-Long Xue, Theo Tang et al. · 0 citations

Jul 2026

CoSA: Accelerating Long-Context Inference via Proxy-Kernel Co-Designed Sparse Attention

CoSA is proposed, a two-stage training-free Sparse Attention under proxy-kernel CO-design, which couples a Kernel-Aware Proxy (KAP) with an Ordered-Skipping Kernel (OSK) and achieves a 4.93% attention speedup and reduces end-to-end Time-to-First-Token by 2.53% with negligible performance degradation.

Yufei Xue, Lin Niu, Hong Liu et al. · arXiv.org · 0 citations