Messages in this thread | | | Date | Tue, 6 Aug 2019 10:04:15 +0200 | From | Michal Hocko <> | Subject | Re: [mm] 755d6edc1a: will-it-scale.per_process_ops -4.1% regression |
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On Tue 06-08-19 15:05:47, kernel test robot wrote: > Greeting, > > FYI, we noticed a -4.1% regression of will-it-scale.per_process_ops due to commit:
I have to confess I cannot make much sense from numbers because they seem to be too volatile and the main contributor doesn't stand up for me. Anyway, regressions on microbenchmarks like this are not all that surprising when a locking is slightly changed and the critical section made shorter. I have seen that in the past already.
That being said I would still love to get to bottom of this bug rather than play with the lock duration by a magic. In other words http://lkml.kernel.org/r/20190730125751.GS9330@dhcp22.suse.cz -- Michal Hocko SUSE Labs
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