Variance of performance and CPU/NUMA isolation

[TreeinRandomForest]

There is a large amount of variance in performance metric values which is most likely driven by shared resources.

Use isolcpu, taskset, numactl to pin down these variables and measure the variance.

[TreeinRandomForest]

References:

https://www.codeblueprint.co.uk/2019/10/08/isolcpus-is-deprecated-kinda.html

https://codywu2010.wordpress.com/2015/09/27/isolcpus-numactl-and-taskset

https://access.redhat.com/solutions/2884991

https://lwn.net/Articles/816298/

Run phoronix tests (./phoronix-test-suite list-available-tests) from https://www.phoronix-test-suite.com/ and measure variance.