From: Michal Hocko <mhocko@suse.cz>
To: Sha Zhengju <handai.szj@gmail.com>
Cc: linux-mm@kvack.org, cgroups@vger.kernel.org,
kamezawa.hiroyu@jp.fujitsu.com, glommer@gmail.com,
gthelen@google.com, fengguang.wu@intel.com,
akpm@linux-foundation.org, Sha Zhengju <handai.szj@taobao.com>
Subject: Re: [PATCH V5 0/8] Add memcg dirty/writeback page accounting
Date: Thu, 1 Aug 2013 16:43:26 +0200 [thread overview]
Message-ID: <20130801144326.GI5198@dhcp22.suse.cz> (raw)
In-Reply-To: <1375357402-9811-1-git-send-email-handai.szj@taobao.com>
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.
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.
> 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
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2013-08-01 14:43 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
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
2013-08-02 20:30 ` Sage Weil
2013-08-03 8:58 ` 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
2013-08-04 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
2013-08-03 9:25 ` Sha Zhengju
2013-08-04 10:08 ` Michal Hocko
2013-08-22 9:46 ` Fwd: " 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
2013-08-22 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
2013-08-01 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
2013-08-05 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 14:43 ` Michal Hocko [this message]
2013-08-03 9:30 ` [PATCH V5 0/8] Add memcg dirty/writeback page accounting Sha Zhengju
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130801144326.GI5198@dhcp22.suse.cz \
--to=mhocko@suse.cz \
--cc=akpm@linux-foundation.org \
--cc=cgroups@vger.kernel.org \
--cc=fengguang.wu@intel.com \
--cc=glommer@gmail.com \
--cc=gthelen@google.com \
--cc=handai.szj@gmail.com \
--cc=handai.szj@taobao.com \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox