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Author

Christos Kozyrakis

4 papers indexed here

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#artificial intelligence Preprint Sep 2026

PerfReasoning: How Well Do LLMs Reason on Hardware Performance?

PerfReasoning is introduced, a benchmark that evaluates LLMs both as direct performance reasoners and as generators of analytical performance-model code, exposing the gap between plausible architectural reasoning and reliable performance-model construction.

Da Zhao, K. Sankaralingam, Christos Kozyrakis et al. · 0 citations
Preprint Aug 2026

HiSparse: Scaling Sparse-Attention Decoding with Hierarchical KV Cache Management

HiSparse is merged into upstream SGLang and evaluated across three sparse-attention families (DSA, NSA, and Quest) on H200, B200, and GH200 platforms: it improves peak generation throughput by up to 4.7x on long-context workloads while preserving comparable per-token latency and reducing time-to-first-token at high loa...

Zhiqiang Xie, Zhangheng Huang, Ting-Jun Huang et al. · 4 citations · ⚡1
Preprint Aug 2026

Over the Memory Wall, Into the Instruction Wall: The New Bottleneck in GPU Data Processing

Valk, a performance analysis tool that combines data from multiple profilers, shows that when memory bandwidth is increased, kernels become compute bound, and makes three recommendations to fully utilize the GPUs' potential for relational workloads when the memory wall is removed.

S. Hepkema, Bo-Wen Wu, Christos Kozyrakis et al. · 0 citations

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