RE: [LKP] Re: [perf/x86] 81ec3f3c4c: will-it-scale.per_process_ops -5.5% regression

From: Kleen, Andi
Date: Sat Feb 22 2020 - 12:08:24 EST

>Thanks for the suggestion, I tried this and the 5.5 regrssion is gone!
>which also confirms the offset for the bulk of stuff following "pmu"
>causes the performance drop.

Okay that confirms that it is false sharing. Looking at c2c is the right way to
go then.

Peter, could adopt the padding as a workaround for now?