From: Peter Zijlstra <peterz@infradead.org>
To: kernel test robot <xiaolong.ye@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Mike Galbraith <efault@gmx.de>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
lkp@01.org
Subject: Re: [lkp] [sched/fair] e210bffd39: perf-stat.cpu-migrations -36.0% decrease
Date: Thu, 4 Aug 2016 11:01:24 +0200 [thread overview]
Message-ID: <20160804090124.GK6879@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20160804052423.GA26201@yexl-desktop>
On Thu, Aug 04, 2016 at 01:24:23PM +0800, kernel test robot wrote:
>
> FYI, we noticed perf-stat.cpu-migrations -36.0% decrease due to commit:
>
> commit e210bffd39d01b649c94b820c28ff112673266dd ("sched/fair: Fix and optimize the fork() path")
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>
> in testcase: unixbench
> on test machine: 16 threads Broadwell-DE with 8G memory
> with following parameters:
>
> runtime: 300s
> nr_task: 1
> test: shell8
> cpufreq_governor: performance
>
>
Urgh, I so hate these reports. They're near useless :/
It took me 3 readings to realize it was the unixbench testcase (why
isn't that in the subject!?). But then I still haven't found the primary
performance metric. Does the test improve, degrade or not change
overall?
next prev parent reply other threads:[~2016-08-04 9:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-04 5:24 [lkp] [sched/fair] e210bffd39: perf-stat.cpu-migrations -36.0% decrease kernel test robot
2016-08-04 9:01 ` Peter Zijlstra [this message]
2016-08-04 9:05 ` Vincent Guittot
2016-08-04 13:57 ` Ye Xiaolong
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