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SubjectRe: [PATCH v2 0/4] locking/mutex: Enable optimistic spinning of lock waiter
On Mon, Mar 21, 2016 at 11:19:02PM -0400, Waiman Long wrote:
> Instead, the subject was
>
> [lkp] [locking/mutex] 5267438002: +38.9%
> fileio.time.involuntary_context_switches
>
> 4409 ± 1% +38.9% 6126 ± 2%
> fileio.time.involuntary_context_switches
> 6.00 ± 0% +33.3% 8.00 ± 0%
> fileio.time.percent_of_cpu_this_job_got
> 36.06 ± 0% +43.0% 51.55 ± 0% fileio.time.system_time
> 1828660 ± 0% -92.5% 137258 ± 0%
> fileio.time.voluntary_context_switches
>
> Given that the number of voluntary context switches dropped by 92.5%, an
> increase in involuntary context switches that is order of magnitude less
> than the voluntary context switches should be OK, I think.
>
> Do you know how to report back that this increase is expected and is nothing
> to worry about? Do I just reply it back?

Nah, just ignore.

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