From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Vladimir Davydov <vdavydov@parallels.com>
Cc: Paul Turner <pjt@google.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>,
Balbir Singh <bsingharora@gmail.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Srivatsa Vaddagiri <vatsa@in.ibm.com>,
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>,
Ingo Molnar <mingo@elte.hu>,
Pavel Emelianov <xemul@parallels.com>,
Jason Baron <jbaron@redhat.com>
Subject: Re: [patch 00/18] CFS Bandwidth Control v7.2
Date: Tue, 13 Sep 2011 16:00:02 +0200 [thread overview]
Message-ID: <1315922402.5977.10.camel@twins> (raw)
In-Reply-To: <1315915848.1151.26.camel@dhcp-10-30-22-158.sw.ru>
On Tue, 2011-09-13 at 16:10 +0400, Vladimir Davydov wrote:
> In other words, I'd like to know if your code (or the scheduler code)
> tries to gather all tasks of the same cgroup on such a subset of all
> CPUs
No
> so that the tasks can't execute less CPUs without losing quota
> during each period.
what?!
> And if not, are you going to address the issue?
and no.
There is nothing special about being part of a cgroup that warrants
that, as for pipes the scheduler already tries to pull the waking task
to the cpu of the waker if possible (or an idle cache sibling).
next prev parent reply other threads:[~2011-09-13 14:00 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-21 16:43 [patch 00/18] CFS Bandwidth Control v7.2 Paul Turner
2011-07-21 16:43 ` [patch 01/18] sched: (fixlet) dont update shares twice on on_rq parent Paul Turner
2011-07-22 11:06 ` Kamalesh Babulal
2011-07-21 16:43 ` [patch 02/18] sched: hierarchical task accounting for SCHED_OTHER Paul Turner
2011-08-14 16:15 ` [tip:sched/core] sched: Implement " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 03/18] sched: introduce primitives to account for CFS bandwidth tracking Paul Turner
2011-07-22 11:14 ` Kamalesh Babulal
2011-08-14 16:17 ` [tip:sched/core] sched: Introduce " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 04/18] sched: validate CFS quota hierarchies Paul Turner
2011-08-14 16:19 ` [tip:sched/core] sched: Validate " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 05/18] sched: accumulate per-cfs_rq cpu usage and charge against bandwidth Paul Turner
2011-08-14 16:21 ` [tip:sched/core] sched: Accumulate " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 06/18] sched: add a timer to handle CFS bandwidth refresh Paul Turner
2011-08-14 16:23 ` [tip:sched/core] sched: Add " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 07/18] sched: expire invalid runtime Paul Turner
2011-08-14 16:24 ` [tip:sched/core] sched: Expire " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 08/18] sched: add support for throttling group entities Paul Turner
2011-08-08 15:46 ` Lin Ming
2011-08-08 16:00 ` Peter Zijlstra
2011-08-08 16:16 ` Paul Turner
2011-08-14 16:26 ` [tip:sched/core] sched: Add " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 09/18] sched: add support for unthrottling " Paul Turner
2011-08-14 16:27 ` [tip:sched/core] sched: Add " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 10/18] sched: allow for positional tg_tree walks Paul Turner
2011-08-14 16:29 ` [tip:sched/core] sched: Allow " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 11/18] sched: prevent interactions with throttled entities Paul Turner
2011-07-22 11:26 ` Kamalesh Babulal
2011-07-22 11:37 ` Peter Zijlstra
2011-07-22 11:41 ` Kamalesh Babulal
2011-07-22 11:43 ` Peter Zijlstra
2011-07-22 18:16 ` Kamalesh Babulal
2011-08-14 16:30 ` [tip:sched/core] sched: Prevent " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 12/18] sched: prevent buddy " Paul Turner
2011-08-14 16:32 ` [tip:sched/core] sched: Prevent " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 13/18] sched: migrate throttled tasks on HOTPLUG Paul Turner
2011-08-14 16:34 ` [tip:sched/core] sched: Migrate " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 14/18] sched: throttle entities exceeding their allowed bandwidth Paul Turner
2011-08-14 16:35 ` [tip:sched/core] sched: Throttle " tip-bot for Paul Turner
2011-07-21 16:43 ` [patch 15/18] sched: add exports tracking cfs bandwidth control statistics Paul Turner
2011-08-14 16:37 ` [tip:sched/core] sched: Add " tip-bot for Nikhil Rao
2011-07-21 16:43 ` [patch 16/18] sched: return unused runtime on group dequeue Paul Turner
2011-08-14 16:39 ` [tip:sched/core] sched: Return " tip-bot for Paul Turner
2011-07-21 16:43 ` [RFT][patch 17/18] sched: use jump labels to reduce overhead when bandwidth control is inactive Paul Turner
2011-07-21 16:43 ` [patch 18/18] sched: add documentation for bandwidth control Paul Turner
2011-08-14 16:41 ` [tip:sched/core] sched: Add " tip-bot for Bharata B Rao
2011-07-21 23:01 ` [patch 00/18] CFS Bandwidth Control v7.2 Paul Turner
2011-07-25 14:58 ` Peter Zijlstra
2011-07-25 15:00 ` Peter Zijlstra
2011-07-25 16:21 ` Paul E. McKenney
2011-07-25 16:28 ` Peter Zijlstra
2011-07-25 16:46 ` Paul E. McKenney
2011-07-25 17:08 ` Peter Zijlstra
2011-07-25 17:11 ` Dhaval Giani
2011-07-25 17:35 ` Peter Zijlstra
2011-07-28 2:59 ` Paul Turner
2011-09-13 12:10 ` Vladimir Davydov
2011-09-13 14:00 ` Peter Zijlstra [this message]
2011-09-16 8:06 ` Paul Turner
2011-09-19 8:22 ` Vladimir Davydov
2011-09-19 8:33 ` Peter Zijlstra
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