Messages in this thread | | | From | Valentin Schneider <> | Subject | Re: [sched/fair] 38ac256d1c: stress-ng.vm-segv.ops_per_sec -13.8% regression | Date | Thu, 22 Apr 2021 21:42:31 +0100 |
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On 22/04/21 10:55, Valentin Schneider wrote: > I'll go find myself some other x86 box and dig into it; > I'd rather not leave this hanging for too long.
So I found myself a dual-socket Xeon Gold 5120 @ 2.20GHz (64 CPUs) and *there* I get a somewhat consistent ~-6% regression. As I'm suspecting cacheline shenanigans, I also ran that with Peter's recent kthread_is_per_cpu() change, and that brings it down to ~-3%
I'll leave it at here for today, but at least that's something I can work with.
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