[Speed] Linux tip: use isolcpus to have (more) reliable benchmark

[Victor Stinner]

Hi,

I'm sharing with you my notes (tricks) to get more reliable benchmarks
on Linux if your CPU have multiple cores:

https://haypo-notes.readthedocs.org/microbenchmark.html#reliable-micro-benchmarks

FYI perf.py recently got a new --affinity= optional parameter. I plan
to send a patch to automatically use /sys/devices/system/cpu/isolated
if it's not empty.

What are your "tricks" to get reliable benchmarks?

Victor