From: Sha Zhengju <handai.szj@gmail.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
Cgroups <cgroups@vger.kernel.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Glauber Costa <glommer@gmail.com>,
Greg Thelen <gthelen@google.com>,
Wu Fengguang <fengguang.wu@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Sha Zhengju <handai.szj@taobao.com>
Subject: Re: [PATCH V5 0/8] Add memcg dirty/writeback page accounting
Date: Sat, 3 Aug 2013 17:30:26 +0800 [thread overview]
Message-ID: <CAFj3OHUy=w=CJkFZ7QLWRS7-UOm0AA5n07Ykzb4wtd6VZ4k9tw@mail.gmail.com> (raw)
In-Reply-To: <20130801144326.GI5198@dhcp22.suse.cz>
On Thu, Aug 1, 2013 at 10:43 PM, Michal Hocko <mhocko@suse.cz> wrote:
> On Thu 01-08-13 19:43:22, Sha Zhengju wrote:
> [...]
>> Some perforcemance numbers got by Mel's pft test (On a 4g memory and 4-core
>> i5 CPU machine):
>
> I am little bit confused what is this testcase actually testing... AFAIU
> it produces a lot of page faults but they are all anonymous and very
> short lived. So neither dirty nor writeback accounting is done.
>
> I would have expected a testcase which generates a lot of IO.
I see. I'm always not good at testing. :(
>
> Also as a general note. It would be better to mention the number of runs
> and standard deviation so that we have an idea about variability of the
> load.
OK. Thanks for the notes!
>
>> vanilla : memcg enabled, patch not applied
>> patched : all patches are patched
>>
>> * Duration numbers:
>> vanilla patched
>> User 385.38 379.47
>> System 65.12 66.46
>> Elapsed 457.46 452.21
>>
>> * Summary numbers:
>> vanilla:
>> Clients User System Elapsed Faults/cpu Faults/sec
>> 1 0.03 0.18 0.21 931682.645 910993.850
>> 2 0.03 0.22 0.13 760431.152 1472985.863
>> 3 0.03 0.29 0.12 600495.043 1620311.084
>> 4 0.04 0.37 0.12 475380.531 1688013.267
>>
>> patched:
>> Clients User System Elapsed Faults/cpu Faults/sec
>> 1 0.02 0.19 0.22 915362.875 898763.732
>> 2 0.03 0.23 0.13 757518.387 1464893.996
>> 3 0.03 0.30 0.12 592113.126 1611873.469
>> 4 0.04 0.38 0.12 472203.393 1680013.271
>>
>> We can see the performance gap is minor.
> [...]
> --
> Michal Hocko
> SUSE Labs
--
Thanks,
Sha
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prev parent reply other threads:[~2013-08-03 9:30 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-01 11:43 [PATCH V5 0/8] Add memcg dirty/writeback page accounting Sha Zhengju
2013-08-01 11:43 ` Sha Zhengju
2013-08-01 11:44 ` [PATCH 1/8] memcg: remove MEMCG_NR_FILE_MAPPED Sha Zhengju
2013-08-01 11:51 ` [PATCH V5 2/8] fs/ceph: vfs __set_page_dirty_nobuffers interface instead of doing it inside filesystem Sha Zhengju
2013-08-01 15:19 ` Yan, Zheng
2013-08-01 18:27 ` Sage Weil
2013-08-02 10:04 ` Sha Zhengju
[not found] ` <CAFj3OHVXvtr5BDMrGatHZi7M9y+dh1ZKRMQZGjZmNBcg3pNQtw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-08-02 20:30 ` Sage Weil
2013-08-02 20:30 ` Sage Weil
2013-08-03 8:58 ` Sha Zhengju
2013-08-02 9:04 ` Sha Zhengju
2013-08-02 9:04 ` Sha Zhengju
2013-08-02 13:11 ` Yan, Zheng
2013-08-01 11:52 ` [PATCH V5 3/8] memcg: check for proper lock held in mem_cgroup_update_page_stat Sha Zhengju
2013-08-01 14:34 ` Michal Hocko
2013-08-01 14:34 ` Michal Hocko
2013-08-04 18:48 ` Greg Thelen
2013-08-04 18:48 ` Greg Thelen
2013-08-01 11:53 ` [PATCH V5 4/8] memcg: add per cgroup dirty pages accounting Sha Zhengju
2013-08-01 11:54 ` [PATCH V5 5/8] memcg: add per cgroup writeback " Sha Zhengju
2013-08-01 14:53 ` Michal Hocko
[not found] ` <20130801145302.GJ5198-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2013-08-03 9:25 ` Sha Zhengju
2013-08-03 9:25 ` Sha Zhengju
[not found] ` <CAFj3OHV-VCKJfe6bv4UMvv+uj4LELDXsieRZFJD06Yrdyy=XxA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-08-04 10:08 ` Michal Hocko
2013-08-04 10:08 ` Michal Hocko
2013-08-22 9:46 ` Fwd: " Sha Zhengju
2013-08-22 9:46 ` Sha Zhengju
2013-08-22 9:50 ` [PATCH 1/4] memcg: remove MEMCG_NR_FILE_MAPPED Sha Zhengju
2013-08-22 9:52 ` [PATCH 2/4] memcg: check for proper lock held in mem_cgroup_update_page_stat Sha Zhengju
2013-08-22 9:53 ` [PATCH 3/4] memcg: add per cgroup writeback pages accounting Sha Zhengju
2013-08-22 22:40 ` Andrew Morton
2013-08-23 16:11 ` Sha Zhengju
2013-08-23 16:11 ` Sha Zhengju
2013-08-22 9:53 ` [PATCH 4/4] memcg: Document cgroup dirty/writeback memory statistics Sha Zhengju
2013-08-04 18:51 ` [PATCH V5 5/8] memcg: add per cgroup writeback pages accounting Greg Thelen
2013-08-04 18:51 ` Greg Thelen
2013-08-01 11:55 ` [PATCH V5 6/8] memcg: make nocpu_base available for non-hotplug Sha Zhengju
2013-08-01 12:00 ` [PATCH V5 7/8] memcg: don't account root memcg page stats if only root exists Sha Zhengju
2013-08-01 16:20 ` Johannes Weiner
2013-08-02 4:32 ` Sha Zhengju
2013-08-02 4:32 ` Sha Zhengju
2013-08-05 21:58 ` Johannes Weiner
2013-08-05 21:58 ` Johannes Weiner
2013-08-01 12:00 ` [PATCH V5 8/8] memcg: Document cgroup dirty/writeback memory statistics Sha Zhengju
2013-08-01 12:00 ` Sha Zhengju
2013-08-01 14:43 ` [PATCH V5 0/8] Add memcg dirty/writeback page accounting Michal Hocko
2013-08-03 9:30 ` Sha Zhengju [this message]
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