Re: [LKP] [/proc/stat] 3047027b34: reaim.jobs_per_min -4.8% regression

[Alexey Dobriyan]

On Tue, Jan 22, 2019 at 09:02:53AM +1300, Kees Cook wrote:
> On Fri, Jan 18, 2019 at 9:44 PM kernel test robot <rong.a.chen@xxxxxxxxx> wrote:
> >
> > Greeting,
> >
> > FYI, we noticed a -4.8% regression of reaim.jobs_per_min due to commit:
> >
> >
> > commit: 3047027b34b8c6404b509903058b89836093acc7 ("[PATCH 2/2] /proc/stat: Add sysctl parameter to control irq counts latency")
> > url: https://github.com/0day-ci/linux/commits/Waiman-Long/proc-stat-Reduce-irqs-counting-performance-overhead/20190108-104818
> 
> Is this expected? (And it seems like other things in the report below
> are faster? I don't understand why this particular regression was
> called out?)

No, but the sysctl has been dropped, so the point is moot.