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Author

Christos Kozyrakis

6 papers indexed here

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#artificial intelligence Preprint Sep 2026

Purlin: Separating Orchestration from the Datapath of Collectives

This work presents Purlin, a scale-up communication framework that separates semantics, orchestration, and the datapath for distributed inference from existing collective implementations, and introduces a shared orchestration protocol, Stage, Notify, And Consume (SNAC), which derives coordination from these specificati...

Osayamen Jonathan Aimuyo, Swapnil Gandhi, Christos Kozyrakis · 0 citations
#artificial intelligence Book Open access Apr 2026

Ave: Guiding Agentic GPU Optimization Using Data-Flow Invariants

Ave, an agentic framework that uses data-flow invariants as compile-time guardrails for kernel optimization and evaluates Ave on AMD MI300X across GEMM, flash attention, and MoE, which together account for up to 90% of GPU time in LLM inference.

Hao-Hui Mai, Xiao-Yang Guo, Xiang-Yun Ding et al. · 1 citation
#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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