From: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Turner <pjt@google.com>,
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
Vladimir Davydov <vdavydov@parallels.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Bharata B Rao <bharata@linux.vnet.ibm.com>,
Dhaval Giani <dhaval.giani@gmail.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Ingo Molnar <mingo@elte.hu>,
Pavel Emelianov <xemul@parallels.com>
Subject: Re: CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinnede
Date: Fri, 9 Sep 2011 18:56:37 +0530 [thread overview]
Message-ID: <20110909132637.GA8724@linux.vnet.ibm.com> (raw)
In-Reply-To: <1315571462.26517.9.camel@twins>
* Peter Zijlstra <a.p.zijlstra@chello.nl> [2011-09-09 14:31:02]:
> > We have setup cgroups and their hard limits so that in theory they should
> > consume the entire capacity available on machine, leading to 0% idle time.
> > That's not what we see. A more detailed description of the setup and the problem
> > is here:
> >
> > https://lkml.org/lkml/2011/6/7/352
>
> That's frigging irrelevant isn't it? A patch should contain its own
> justification.
Agreed my bad. I was (wrongly) setting the problem context by posting
this in response to Paul's email where the problem was discussed.
> > One
> > possibility is to make the idle load balancer become aggressive in
> > pulling tasks across sched-domain boundaries i.e when a CPU becomes idle
> > (after a task got throttled) and invokes the idle load balancer, it
> > should try "harder" at pulling a task from far-off cpus (across
> > package/node boundaries)?
>
> How about we just live with it?
I think we will, unless the load balancer can be improved (which seems unlikely
to me :-()
- vatsa
next prev parent reply other threads:[~2011-09-09 13:27 UTC|newest]
Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-03 9:28 [patch 00/15] CFS Bandwidth Control V6 Paul Turner
2011-05-03 9:28 ` [patch 01/15] sched: (fixlet) dont update shares twice on on_rq parent Paul Turner
2011-05-10 7:14 ` Hidetoshi Seto
2011-05-10 8:32 ` Mike Galbraith
2011-05-11 7:55 ` Hidetoshi Seto
2011-05-11 8:13 ` Paul Turner
2011-05-11 8:45 ` Mike Galbraith
2011-05-11 8:59 ` Hidetoshi Seto
2011-05-03 9:28 ` [patch 02/15] sched: hierarchical task accounting for SCHED_OTHER Paul Turner
2011-05-10 7:17 ` Hidetoshi Seto
2011-05-03 9:28 ` [patch 03/15] sched: introduce primitives to account for CFS bandwidth tracking Paul Turner
2011-05-10 7:18 ` Hidetoshi Seto
2011-05-03 9:28 ` [patch 04/15] sched: validate CFS quota hierarchies Paul Turner
2011-05-10 7:20 ` Hidetoshi Seto
2011-05-11 9:37 ` Paul Turner
2011-05-16 9:30 ` Peter Zijlstra
2011-05-16 9:43 ` Peter Zijlstra
2011-05-16 12:32 ` Paul Turner
2011-05-17 15:26 ` Peter Zijlstra
2011-05-18 7:16 ` Paul Turner
2011-05-18 11:57 ` Peter Zijlstra
2011-05-03 9:28 ` [patch 05/15] sched: add a timer to handle CFS bandwidth refresh Paul Turner
2011-05-10 7:21 ` Hidetoshi Seto
2011-05-11 9:27 ` Paul Turner
2011-05-16 10:18 ` Peter Zijlstra
2011-05-16 12:56 ` Paul Turner
2011-05-03 9:28 ` [patch 06/15] sched: accumulate per-cfs_rq cpu usage and charge against bandwidth Paul Turner
2011-05-10 7:22 ` Hidetoshi Seto
2011-05-11 9:25 ` Paul Turner
2011-05-16 10:27 ` Peter Zijlstra
2011-05-16 12:59 ` Paul Turner
2011-05-17 15:28 ` Peter Zijlstra
2011-05-18 7:02 ` Paul Turner
2011-05-16 10:32 ` Peter Zijlstra
2011-05-03 9:28 ` [patch 07/15] sched: expire invalid runtime Paul Turner
2011-05-10 7:22 ` Hidetoshi Seto
2011-05-16 11:05 ` Peter Zijlstra
2011-05-16 11:07 ` Peter Zijlstra
2011-05-03 9:28 ` [patch 08/15] sched: throttle cfs_rq entities which exceed their local runtime Paul Turner
2011-05-10 7:23 ` Hidetoshi Seto
2011-05-16 15:58 ` Peter Zijlstra
2011-05-16 16:05 ` Peter Zijlstra
2011-05-03 9:28 ` [patch 09/15] sched: unthrottle cfs_rq(s) who ran out of quota at period refresh Paul Turner
2011-05-10 7:24 ` Hidetoshi Seto
2011-05-11 9:24 ` Paul Turner
2011-05-03 9:28 ` [patch 10/15] sched: allow for positional tg_tree walks Paul Turner
2011-05-10 7:24 ` Hidetoshi Seto
2011-05-17 13:31 ` Peter Zijlstra
2011-05-18 7:18 ` Paul Turner
2011-05-03 9:28 ` [patch 11/15] sched: prevent interactions between throttled entities and load-balance Paul Turner
2011-05-10 7:26 ` Hidetoshi Seto
2011-05-11 9:11 ` Paul Turner
2011-05-03 9:28 ` [patch 12/15] sched: migrate throttled tasks on HOTPLUG Paul Turner
2011-05-10 7:27 ` Hidetoshi Seto
2011-05-11 9:10 ` Paul Turner
2011-05-03 9:28 ` [patch 13/15] sched: add exports tracking cfs bandwidth control statistics Paul Turner
2011-05-10 7:27 ` Hidetoshi Seto
2011-05-11 7:56 ` Hidetoshi Seto
2011-05-11 9:09 ` Paul Turner
2011-05-03 9:29 ` [patch 14/15] sched: return unused runtime on voluntary sleep Paul Turner
2011-05-10 7:28 ` Hidetoshi Seto
2011-05-03 9:29 ` [patch 15/15] sched: add documentation for bandwidth control Paul Turner
2011-05-10 7:29 ` Hidetoshi Seto
2011-05-11 9:09 ` Paul Turner
2011-06-07 15:45 ` CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinned Kamalesh Babulal
2011-06-08 3:09 ` Paul Turner
2011-06-08 10:46 ` Vladimir Davydov
2011-06-08 16:32 ` Kamalesh Babulal
2011-06-09 3:25 ` Paul Turner
2011-06-10 18:17 ` Kamalesh Babulal
2011-06-14 0:00 ` Paul Turner
2011-06-15 5:37 ` Kamalesh Babulal
2011-06-21 19:48 ` Paul Turner
2011-06-24 15:05 ` Kamalesh Babulal
2011-09-07 11:00 ` Srivatsa Vaddagiri
2011-09-07 14:54 ` Srivatsa Vaddagiri
2011-09-07 15:20 ` CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinnede Srivatsa Vaddagiri
2011-09-07 19:22 ` Peter Zijlstra
2011-09-08 15:15 ` Srivatsa Vaddagiri
2011-09-09 12:31 ` Peter Zijlstra
2011-09-09 13:26 ` Srivatsa Vaddagiri [this message]
2011-09-12 10:17 ` Srivatsa Vaddagiri
2011-09-12 12:35 ` Peter Zijlstra
2011-09-13 4:15 ` Srivatsa Vaddagiri
2011-09-13 5:03 ` Srivatsa Vaddagiri
2011-09-13 5:05 ` Srivatsa Vaddagiri
2011-09-13 9:39 ` Peter Zijlstra
2011-09-13 11:28 ` Srivatsa Vaddagiri
2011-09-13 14:07 ` Peter Zijlstra
2011-09-13 16:21 ` Srivatsa Vaddagiri
2011-09-13 16:33 ` Peter Zijlstra
2011-09-13 17:41 ` Srivatsa Vaddagiri
2011-09-13 16:36 ` Peter Zijlstra
2011-09-13 17:54 ` Srivatsa Vaddagiri
2011-09-13 18:03 ` Peter Zijlstra
2011-09-13 18:12 ` Srivatsa Vaddagiri
2011-09-13 18:07 ` Peter Zijlstra
2011-09-13 18:19 ` Peter Zijlstra
2011-09-13 18:28 ` Srivatsa Vaddagiri
2011-09-13 18:30 ` Peter Zijlstra
2011-09-13 18:35 ` Srivatsa Vaddagiri
2011-09-15 17:55 ` Kamalesh Babulal
2011-09-15 21:48 ` Peter Zijlstra
2011-09-19 17:51 ` Kamalesh Babulal
2011-09-20 0:38 ` Venki Pallipadi
2011-09-20 11:09 ` Kamalesh Babulal
2011-09-20 13:56 ` Peter Zijlstra
2011-09-20 14:04 ` Peter Zijlstra
2011-09-20 12:55 ` Peter Zijlstra
2011-09-21 17:34 ` Kamalesh Babulal
2011-09-13 14:19 ` Peter Zijlstra
2011-09-13 18:01 ` Srivatsa Vaddagiri
2011-09-13 18:23 ` Peter Zijlstra
2011-09-16 8:14 ` Paul Turner
2011-09-16 8:28 ` Peter Zijlstra
2011-09-19 16:35 ` Srivatsa Vaddagiri
2011-09-16 8:22 ` Paul Turner
2011-06-14 10:16 ` CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinned Hidetoshi Seto
2011-06-14 6:58 ` [patch 00/15] CFS Bandwidth Control V6 Hu Tao
2011-06-14 7:29 ` Hidetoshi Seto
2011-06-14 7:44 ` Hu Tao
2011-06-15 8:37 ` Hu Tao
2011-06-16 0:57 ` Hidetoshi Seto
2011-06-16 9:45 ` Hu Tao
2011-06-17 1:22 ` Hidetoshi Seto
2011-06-17 6:05 ` Hu Tao
2011-06-17 6:25 ` Paul Turner
2011-06-17 9:13 ` Hidetoshi Seto
2011-06-18 0:28 ` Paul Turner
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