Re: [PATCH v6 0/4] sched/fair: Improve scan efficiency of SIS

From: Abel Wu
Date: Thu Feb 16 2023 - 08:18:26 EST


Hi Prateek, thanks very much for your solid testings!

On 2/7/23 11:42 AM, K Prateek Nayak wrote:
Hello Abel,

I've retested the patches with on the updated tip and the results
are still promising.

tl;dr

o Hackbench sees improvements when the machine is overloaded.
o tbench shows improvements when the machine is overloaded.
o The unixbench regression seen previously seems to be unrelated
to the patch as the spawn test scores are vastly different
after a reboot/kexec for the same kernel.
o Other benchmarks show slight improvements or are comparable to
the numbers on tip.

Cheers! Yet I still see some minor regressions in the report
below. As we discussed last time, reducing unnecessary updates
on the idle cpumask when LLC is overloaded should help.

Thanks & Best regards,
Abel