[CI][Benchmarks] Benches OS setup guide #19577
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| ## Overview | ||
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| Performance benchmarking requires a stable and optimized system environment to produce reliable and reproducible results. This guide covers essential system tuning steps for reducing run-to-run variance in benchmark results and enabling consistent results across different runs. |
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| Performance benchmarking requires a stable and optimized system environment to produce reliable and reproducible results. This guide covers essential system tuning steps for reducing run-to-run variance in benchmark results and enabling consistent results across different runs. | |
| Performance benchmarking requires a stable and optimized system environment to produce reliable and reproducible results. This guide covers essential system tuning steps for reducing run-to-run variance in benchmark results. |
| Add the following to `/etc/default/grub` in `GRUB_CMDLINE_LINUX`: | ||
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| ```bash | ||
| # Disable CPU frequency scaling | ||
| intel_pstate=disable | ||
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| # Isolate CPUs for benchmark workloads (example: reserve cores 2-7), preventing other processes | ||
| # from using them. | ||
| isolcpus=2-7 | ||
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| # Set CPU governor to performance | ||
| sudo cpupower frequency-set --governor performance | ||
| # Apply changes to system | ||
| sudo sysctl --system | ||
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| # Check current governor | ||
| sudo cpupower frequency-info | ||
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| # Example complete line: | ||
| GRUB_CMDLINE_LINUX="intel_pstate=disable isolcpus=2-7" | ||
| ``` |
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This is... malformated? You can't run commands as part of GRUB_CMDLINE_LINUX.
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I've fixed formatting so it is clear what are the actual commands to paste in a terminal
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Actually, maybe you could add another section how to configure perf correctly. Some of the benchmarks (ur submit kernel) requires perf to have permissions to sample hw counters.
(the steps to take is basically what perf tells you to do when you do perf record ls without correct permissions)
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Added the section |
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Preview: https://github.com/PatKamin/llvm/blob/perf-setup-readme/devops/scripts/benchmarks/PERFORMANCE_TUNING.md