nviennot/core-to-core-latency

Health v2 · maintenance only

Adoption not part of the score

1360 stars · 107 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Rust CLI tool that measures the latency of inter-core communication on a CPU by pinning threads to different cores and timing compare-exchange operations through the cache coherence protocol. It publishes a comparison table of median latencies across many modern CPUs.

Use cases

• measure core-to-core latency on my CPU
• benchmark cache coherence latency between CPU cores
• compare inter-core communication latency across processors
• check NUMA and CCX latency penalties on Ryzen or EPYC
• profile how fast cores can exchange messages via atomics
• evaluate CPU interconnect performance before buying hardware

When to choose

• you need empirical inter-core latency numbers for performance tuning or hardware evaluation
• you want a simple installable CLI benchmark with published reference results
• you are comparing hybrid, multi-CCX, or multi-socket CPU topologies

When to avoid

• you need general-purpose CPU benchmarking like throughput or FLOPS
• you want memory bandwidth or single-core performance measurements
• you need a GUI-based system benchmarking suite

Facets

cli-tool · maturity active

benchmarking cli developer-tools performance hardware developer-tools windows cross-platform cli rust cpu-latency cache-coherence microbenchmark cpu-affinity rust command-line linux macos

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For agents

markdown · JSON · MCP: product_card(name="nviennot/core-to-core-latency")