nviennot/core-to-core-latency

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Measuring CPU core-to-core latency We measure the latency it takes for a CPU to send a message to another CPU via its cache coherence protocol. By pinning two threads on two different CPU cores, we can get them to do a bunch of compare-exchange operation, and measure the latency. How to run: $ cargo install core-to-core-latency $ core-to-core-latency Single socket results CPU Median Latency AMD Ryzen 9 7950X, 16 Cores, zen4, 2022-Q3 68ns AMD EPYC 7773X, 64 Cores, Milan-X, 2022-Q1 115ns Intel Xeon...