From: Paul Turner <pjt@google.com>
To: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Bharata B Rao <bharata@linux.vnet.ibm.com>,
Dhaval Giani <dhaval.giani@gmail.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Srivatsa Vaddagiri <vatsa@in.ibm.com>,
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
Ingo Molnar <mingo@elte.hu>, Pavel Emelyanov <xemul@openvz.org>
Subject: Re: [patch 00/15] CFS Bandwidth Control V5
Date: Mon, 4 Apr 2011 16:10:11 -0700 [thread overview]
Message-ID: <BANLkTim1rkrXcsFpGJ3oXjQhwgO9oZvs4A@mail.gmail.com> (raw)
In-Reply-To: <4D9433DC.5020008@cn.fujitsu.com>
On Thu, Mar 31, 2011 at 12:57 AM, Xiao Guangrong
<xiaoguangrong@cn.fujitsu.com> wrote:
> On 03/23/2011 11:03 AM, Paul Turner wrote:
>> Hi all,
>>
>> Please find attached the latest version of bandwidth control for the normal
>> scheduling class. This revision has undergone fairly extensive changes since
>> the previous version based largely on the observation that many of the edge
>> conditions requiring special casing around update_curr() were a result of
>> introducing side-effects into that operation. By introducing an interstitial
>> state, where we recognize that the runqueue is over bandwidth, but not marking
>> it throttled until we can actually remove it from the CPU we avoid the
>> previous possible interactions with throttled entities which eliminates some
>> head-scratching corner cases.
>>
>
> Hi Paul,
>
> I have wrote some codes to test this patchset. While run attached test case,
> the test program is blocked, it seams the children tasks can not be killed,
> after one or two hours, the watchdog is expired and triggers box crashed.
>
Sorry, I was out last week.
I'm taking a look at this now, I believe the interaction lies
somewhere within the quota return paths.
Thanks for taking the time to test!
- Paul
next prev parent reply other threads:[~2011-04-04 23:11 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-23 3:03 [patch 00/15] CFS Bandwidth Control V5 Paul Turner
2011-03-23 3:03 ` [patch 01/15] sched: introduce primitives to account for CFS bandwidth tracking Paul Turner
2011-03-24 12:38 ` Kamalesh Babulal
2011-04-05 13:28 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 02/15] sched: validate CFS quota hierarchies Paul Turner
2011-03-23 10:39 ` torbenh
2011-03-23 20:49 ` Paul Turner
2011-03-24 6:31 ` Bharata B Rao
2011-04-08 17:01 ` Peter Zijlstra
2011-03-29 6:57 ` Hidetoshi Seto
2011-04-04 23:10 ` Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 03/15] sched: accumulate per-cfs_rq cpu usage Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-04-06 20:44 ` Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-04-06 20:47 ` Paul Turner
2011-03-23 3:03 ` [patch 04/15] sched: throttle cfs_rq entities which exceed their local quota Paul Turner
2011-03-23 5:09 ` Mike Galbraith
2011-03-23 20:53 ` Paul Turner
2011-03-24 6:36 ` Bharata B Rao
2011-03-24 7:40 ` Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-04-05 23:15 ` Paul Turner
2011-03-23 3:03 ` [patch 05/15] sched: unthrottle cfs_rq(s) who ran out of quota at period refresh Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-04-05 13:33 ` Peter Zijlstra
2011-04-05 13:28 ` Peter Zijlstra
2011-04-05 13:28 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 06/15] sched: allow for positional tg_tree walks Paul Turner
2011-03-23 3:03 ` [patch 07/15] sched: prevent interactions between throttled entities and load-balance Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 08/15] sched: migrate throttled tasks on HOTPLUG Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-04-06 2:31 ` Paul Turner
2011-03-23 3:03 ` [patch 09/15] sched: add exports tracking cfs bandwidth control statistics Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 10/15] sched: (fixlet) dont update shares twice on on_rq parent Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 11/15] sched: hierarchical task accounting for SCHED_OTHER Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 12/15] sched: maintain throttled rqs as a list Paul Turner
2011-04-22 2:50 ` Hidetoshi Seto
2011-04-24 21:23 ` Paul Turner
2011-03-23 3:03 ` [patch 13/15] sched: expire slack quota using generation counters Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-04-06 7:22 ` Paul Turner
2011-04-06 8:15 ` Peter Zijlstra
2011-04-06 11:26 ` Peter Zijlstra
2011-03-23 3:03 ` [patch 14/15] sched: return unused quota on voluntary sleep Paul Turner
2011-04-05 13:28 ` Peter Zijlstra
2011-04-06 2:25 ` Paul Turner
2011-03-23 3:03 ` [patch 15/15] sched: add documentation for bandwidth control Paul Turner
2011-03-24 6:38 ` Bharata B Rao
2011-03-24 16:12 ` [patch 00/15] CFS Bandwidth Control V5 Bharata B Rao
2011-03-31 7:57 ` Xiao Guangrong
2011-04-04 23:10 ` Paul Turner [this message]
2011-04-05 13:28 ` Peter Zijlstra
2011-05-20 2:12 ` Test for CFS Bandwidth Control V6 Xiao Guangrong
2011-05-24 0:53 ` Hidetoshi Seto
2011-05-24 7:56 ` Xiao Guangrong
2011-06-08 2:54 ` Paul Turner
2011-06-08 5:55 ` Hidetoshi Seto
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