From: "Huang\, Ying" <ying.huang@intel.com>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: "Huang\, Ying" <ying.huang@intel.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Andi Kleen <ak@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>, LKP <lkp@01.org>,
LKML <linux-kernel@vger.kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [LKP] [lkp-developer] [sched/fair] 4e5160766f: +149% ftq.noise.50% regression
Date: Tue, 28 Feb 2017 08:33:27 +0800 [thread overview]
Message-ID: <87tw7ff92g.fsf@yhuang-dev.intel.com> (raw)
In-Reply-To: <CAKfTPtBN+NmOXREQK6v-_dfrcDNux-BUG0A7xk3oOj-s7t37Bg@mail.gmail.com> (Vincent Guittot's message of "Mon, 27 Feb 2017 10:44:02 +0100")
Vincent Guittot <vincent.guittot@linaro.org> writes:
> Hi Ying,
>
> On 21 February 2017 at 03:40, Huang, Ying <ying.huang@intel.com> wrote:
>> Hi, Vincent,
>>
>> Vincent Guittot <vincent.guittot@linaro.org> writes:
>>
>
> [snip]
>
>>>>
>>>> Here is the test result,
>>>>
>>>> =========================================================================================
>>>> compiler/cpufreq_governor/freq/kconfig/nr_task/rootfs/samples/tbox_group/test/testcase:
>>>> gcc-6/powersave/20/x86_64-rhel-7.2/100%/debian-x86_64-2016-08-31.cgz/6000ss/lkp-hsw-d01/cache/ftq
>>>>
>>>> commit:
>>>> 4e5160766fcc9f41bbd38bac11f92dce993644aa: first bad commit
>>>> 09a43ace1f986b003c118fdf6ddf1fd685692d49: parent of first bad commit
>>>> b524060933c546fd2410c5a09360ba23a0fef846: with fix patch above
>>>>
>>>> 4e5160766fcc9f41 09a43ace1f986b003c118fdf6d b524060933c546fd2410c5a093
>>>> ---------------- -------------------------- --------------------------
>>>> %stddev %change %stddev %change %stddev
>>>> \ | \ | \
>>>> 3463 ± 10% -61.4% 1335 ± 17% -3.0% 3359 ± 2% ftq.noise.50%
>>>> 1116 ± 23% -73.7% 293.90 ± 30% -23.8% 850.69 ± 17% ftq.noise.75%
>>>
>>> To be honest, I was expecting at least the same level of improvement
>>> as the previous patch if not better but i was not expecting worse
>>> results
>>
>> What's your next plan for this regression? At least your previous patch
>> could recover part of it.
>
> I haven't been able to find better fix than the previous patch so i'm
> going to send a clean version with proper commit message
Great to know this. Could you keep me posted?
Best Regards,
Huang, Ying
> Regards,
> Vincent
>
>>
>> Best Regards,
>> Huang, Ying
next prev parent reply other threads:[~2017-02-28 0:34 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-12 5:43 [lkp-developer] [sched/fair] 4e5160766f: +149% ftq.noise.50% regression kernel test robot
2016-12-12 13:25 ` Vincent Guittot
2016-12-13 1:47 ` [LKP] " Huang, Ying
2016-12-22 15:12 ` Vincent Guittot
2016-12-28 8:17 ` Huang, Ying
2017-01-02 15:42 ` Vincent Guittot
2017-01-03 10:38 ` Dietmar Eggemann
2017-01-03 11:37 ` Vincent Guittot
2017-01-04 3:08 ` Huang, Ying
2017-01-04 14:06 ` Vincent Guittot
2017-02-21 2:40 ` Huang, Ying
2017-02-27 9:44 ` Vincent Guittot
2017-02-28 0:33 ` Huang, Ying [this message]
2017-02-28 9:35 ` Vincent Guittot
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