From: Alexey Dobriyan <adobriyan@gmail.com>
To: Kees Cook <keescook@chromium.org>
Cc: kernel test robot <rong.a.chen@intel.com>,
Waiman Long <longman@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
LKML <linux-kernel@vger.kernel.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Miklos Szeredi <miklos@szeredi.hu>,
Daniel Colascione <dancol@google.com>,
Dave Chinner <david@fromorbit.com>,
Randy Dunlap <rdunlap@infradead.org>, LKP <lkp@01.org>
Subject: Re: [LKP] [/proc/stat] 3047027b34: reaim.jobs_per_min -4.8% regression
Date: Tue, 22 Jan 2019 00:25:15 +0300 [thread overview]
Message-ID: <20190121212515.GA18118@avx2> (raw)
In-Reply-To: <CAGXu5j+aEs3bq5Ym+VCYGmPQNJZC44vFk9MJDxH1zq=hZ3N4CA@mail.gmail.com>
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@intel.com> 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.
next prev parent reply other threads:[~2019-01-21 21:25 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-07 15:12 [PATCH 0/2] /proc/stat: Reduce irqs counting performance overhead Waiman Long
2019-01-07 15:12 ` [PATCH 1/2] /proc/stat: Extract irqs counting code into show_stat_irqs() Waiman Long
2019-01-07 21:42 ` Kees Cook
2019-01-07 15:12 ` [PATCH 2/2] /proc/stat: Add sysctl parameter to control irq counts latency Waiman Long
2019-01-07 15:58 ` Matthew Wilcox
2019-01-07 16:07 ` Waiman Long
2019-01-07 16:14 ` Matthew Wilcox
2019-01-07 16:19 ` Waiman Long
2019-01-07 16:33 ` Alexey Dobriyan
2019-01-07 16:59 ` Waiman Long
2019-01-18 8:44 ` [LKP] [/proc/stat] 3047027b34: reaim.jobs_per_min -4.8% regression kernel test robot
2019-01-21 20:02 ` Kees Cook
2019-01-21 21:25 ` Alexey Dobriyan [this message]
2019-01-07 22:32 ` [PATCH 0/2] /proc/stat: Reduce irqs counting performance overhead Dave Chinner
2019-01-07 22:41 ` Daniel Colascione
2019-01-07 23:49 ` Alexey Dobriyan
2019-01-07 22:41 ` Waiman Long
2019-01-08 2:04 ` Dave Chinner
2019-01-08 16:11 ` Michal Hocko
2019-01-08 17:05 ` Waiman Long
2019-01-08 17:32 ` Waiman Long
2019-01-08 16:58 ` Waiman Long
2019-01-08 22:27 ` Dave Chinner
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