From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>
Cc: lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
koverstreet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cl-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
Mike Snitzer <snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"Alasdair G. Kergon"
<agk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
Mikulas Patocka
<mpatocka-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Glauber Costa <glommer-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 11/11] cgroup: use percpu refcnt for cgroup_subsys_states
Date: Fri, 14 Jun 2013 22:35:22 -0700 [thread overview]
Message-ID: <20130615053522.GA7017@htj.dyndns.org> (raw)
In-Reply-To: <20130614223125.GD6593-9pTldWuhBndy/B6EtB590w@public.gmane.org>
On Fri, Jun 14, 2013 at 03:31:25PM -0700, Tejun Heo wrote:
> I'll play with it a bit more on an actual machine and post more
> results. Test program attached.
So, here are the results from the same test on a dual-socket 2-way
NUMA opteron 8 core machine.
Running on one CPU.
copy size atomic percpu diff in pct
0 535964443 616756827 +15.07%
32 399988186 378678713 -5.33%
64 389067476 355073979 -8.74%
128 342192631 315615300 -7.77%
256 281208005 260598931 -7.33%
512 188070912 193225269 +2.74%
Running on all eight cores.
copy size atomic percpu diff in pct
0 121324328 4889425511 +3,930.05%
32 96170193 2999613380 +3,019.07%
64 98139061 2813894184 +2,767.25%
128 112610025 2503229487 +2,122.92%
256 96828114 2069865752 +2,037.67%
512 95858297 1537726109 +1,504.17%
Ration of all cores / single core.
copy size atomic percpu
0 0.23 7.93
32 0.24 7.92
64 0.25 7.92
128 0.33 7.93
256 0.34 7.94
512 0.51 7.96
Note exactly 8 - the cores do share quite a bit of resources after all
- but pretty close.
Thanks.
--
tejun
next prev parent reply other threads:[~2013-06-15 5:35 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-13 4:04 [PATCHSET v2 cgroup/for-3.11] cgroup: convert cgroup_subsys_state refcnt to percpu_ref Tejun Heo
2013-06-13 4:04 ` [PATCH 05/11] cgroup: clean up css_[try]get() and css_put() Tejun Heo
[not found] ` <1371096298-24402-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2013-06-13 4:04 ` [PATCH 01/11] cgroup: remove now unused css_depth() Tejun Heo
2013-06-13 4:04 ` [PATCH 02/11] cgroup: consistently use @cset for struct css_set variables Tejun Heo
2013-06-13 4:04 ` [PATCH 03/11] cgroup: bring some sanity to naming around cg_cgroup_link Tejun Heo
2013-06-13 4:04 ` [PATCH 04/11] cgroup: use kzalloc() instead of kmalloc() Tejun Heo
2013-06-13 4:04 ` [PATCH 06/11] cgroup: rename CGRP_REMOVED to CGRP_DEAD Tejun Heo
2013-06-13 4:04 ` [PATCH 07/11] cgroup: drop unnecessary RCU dancing from __put_css_set() Tejun Heo
2013-06-13 4:04 ` [PATCH 09/11] cgroup: reorder the operations in cgroup_destroy_locked() Tejun Heo
2013-06-13 6:04 ` [PATCHSET v2 cgroup/for-3.11] cgroup: convert cgroup_subsys_state refcnt to percpu_ref Li Zefan
[not found] ` <51B960FF.7070604-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-06-13 17:56 ` Tejun Heo
[not found] ` <20130613175627.GC10799-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2013-06-14 2:41 ` Tejun Heo
2013-06-13 4:04 ` [PATCH 08/11] cgroup: remove cgroup->count and use Tejun Heo
2013-06-13 4:04 ` [PATCH 10/11] cgroup: split cgroup destruction into two steps Tejun Heo
2013-06-13 4:04 ` [PATCH 11/11] cgroup: use percpu refcnt for cgroup_subsys_states Tejun Heo
[not found] ` <1371096298-24402-12-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2013-06-13 23:16 ` Kent Overstreet
2013-06-14 12:55 ` Michal Hocko
[not found] ` <20130614125539.GC10084-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2013-06-14 14:15 ` Glauber Costa
[not found] ` <20130614141510.GA19021-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2013-06-14 14:22 ` Michal Hocko
2013-06-14 13:20 ` Michal Hocko
[not found] ` <20130614132026.GD10084-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2013-06-14 22:31 ` Tejun Heo
[not found] ` <20130614223125.GD6593-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2013-06-15 5:35 ` Tejun Heo [this message]
[not found] ` <20130615053522.GA7017-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2013-06-15 5:39 ` Tejun Heo
2013-06-15 6:31 ` Tejun Heo
2013-06-17 13:27 ` Michal Hocko
[not found] ` <20130617132744.GB5018-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2013-06-17 17:16 ` Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2013-06-12 21:03 [PATCHSET cgroup/for-3.11] cgroup: convert cgroup_subsys_state refcnt to percpu_ref Tejun Heo
2013-06-12 21:03 ` [PATCH 11/11] cgroup: use percpu refcnt for cgroup_subsys_states Tejun Heo
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