From: Ye Xiaolong <xiaolong.ye@intel.com>
To: Shakeel Butt <shakeelb@google.com>
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Huang Ying" <ying.huang@intel.com>,
"Tim Chen" <tim.c.chen@linux.intel.com>,
"Michal Hocko" <mhocko@kernel.org>,
"Greg Thelen" <gthelen@google.com>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Balbir Singh" <bsingharora@gmail.com>,
"Minchan Kim" <minchan@kernel.org>, "Shaohua Li" <shli@fb.com>,
"Jan Kara" <jack@suse.cz>, "Nicholas Piggin" <npiggin@gmail.com>,
"Dan Williams" <dan.j.williams@intel.com>,
"Mel Gorman" <mgorman@suse.de>, "Hugh Dickins" <hughd@google.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
lkp@01.org
Subject: Re: [lkp-robot] [mm, mlock, vmscan] 9c4e6b1a70: stress-ng.hdd.ops_per_sec -7.9% regression
Date: Mon, 26 Feb 2018 10:57:28 +0800 [thread overview]
Message-ID: <20180226025728.GA8942@yexl-desktop> (raw)
In-Reply-To: <CALvZod7=kgWDMPbrDUGXznoJgv47fq-PUa97onVhS8x73TR+6g@mail.gmail.com>
Hi, Shakeel
On 02/25, Shakeel Butt wrote:
>On Sun, Feb 25, 2018 at 6:44 AM, kernel test robot
><xiaolong.ye@intel.com> wrote:
>>
>> Greeting,
>>
>> FYI, we noticed a -7.9% regression of stress-ng.hdd.ops_per_sec due to commit:
>>
>>
>> commit: 9c4e6b1a7027f102990c0395296015a812525f4d ("mm, mlock, vmscan: no more skipping pagevecs")
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>>
>> in testcase: stress-ng
>> on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 128G memory
>> with following parameters:
>>
>
>Hi Xiaolong,
>
>Is there a way I can get the output of "perf record -a -g" running in
>parallel to the actual test on this machine. As I have mentioned
>before I am not able to reproduce this issue. However I am trying to
>repro on a VM with 4 vcpus and 4 GiB memory and I don't see any
>difference. I am suspecting that it may repro on a larger machine but
>I don't have access to one.
>
perf.data attached. It was generated via `perf record -q -ag --realtime=1 -m 256`
Thanks,
Xiaolong
>thanks,
>Shakeel
next prev parent reply other threads:[~2018-02-26 2:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-25 14:44 [lkp-robot] [mm, mlock, vmscan] 9c4e6b1a70: stress-ng.hdd.ops_per_sec -7.9% regression kernel test robot
2018-02-25 22:03 ` Shakeel Butt
2018-02-26 2:57 ` Ye Xiaolong [this message]
2018-02-26 4:56 ` [LKP] " Ye Xiaolong
2018-02-26 21:24 ` Shakeel Butt
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