From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: bharata@linux.vnet.ibm.com
Cc: Paul Turner <pjt@google.com>,
linux-kernel@vger.kernel.org,
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>,
Herbert Poetzl <herbert@13thfloor.at>,
Avi Kivity <avi@redhat.com>, Chris Friesen <cfriesen@nortel.com>,
Nikhil Rao <ncrao@google.com>
Subject: Re: [CFS Bandwidth Control v4 3/7] sched: throttle cfs_rq entities which exceed their local quota
Date: Thu, 24 Feb 2011 16:52:53 +0100 [thread overview]
Message-ID: <1298562773.2428.230.camel@twins> (raw)
In-Reply-To: <20110224154547.GA3000@in.ibm.com>
On Thu, 2011-02-24 at 21:15 +0530, Bharata B Rao wrote:
> While I admit that our load balancing semantics wrt thorttled entities are
> not consistent (we don't allow pulling of tasks directly from throttled
> cfs_rqs, while allow pulling of tasks from a throttled hierarchy as in the
> above case), I am beginning to think if it works out to be advantageous.
> Is there a chance that the task gets to run on other CPU where the hierarchy
> isn't throttled since runtime is still available ?
Possible yes, but the load-balancer doesn't know about that, not should
it (its complicated, and broken, enough, no need to add more cruft to
it).
I'm starting to think you all should just toss all this and start over,
its just too smelly.
next prev parent reply other threads:[~2011-02-24 15:53 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-16 3:18 [CFS Bandwidth Control v4 0/7] Introduction Paul Turner
2011-02-16 3:18 ` [CFS Bandwidth Control v4 1/7] sched: introduce primitives to account for CFS bandwidth tracking Paul Turner
2011-02-16 16:52 ` Balbir Singh
2011-02-17 2:54 ` Bharata B Rao
2011-02-23 13:32 ` Peter Zijlstra
2011-02-25 3:11 ` Paul Turner
2011-02-25 20:53 ` Paul Turner
2011-02-16 3:18 ` [CFS Bandwidth Control v4 2/7] sched: accumulate per-cfs_rq cpu usage Paul Turner
2011-02-16 17:45 ` Balbir Singh
2011-02-23 13:32 ` Peter Zijlstra
2011-02-25 3:33 ` Paul Turner
2011-02-25 12:31 ` Peter Zijlstra
2011-02-16 3:18 ` [CFS Bandwidth Control v4 3/7] sched: throttle cfs_rq entities which exceed their local quota Paul Turner
2011-02-18 6:52 ` Balbir Singh
2011-02-23 13:32 ` Peter Zijlstra
2011-02-24 5:21 ` Bharata B Rao
2011-02-24 11:05 ` Peter Zijlstra
2011-02-24 15:45 ` Bharata B Rao
2011-02-24 15:52 ` Peter Zijlstra [this message]
2011-02-24 16:39 ` Bharata B Rao
2011-02-24 17:20 ` Peter Zijlstra
2011-02-25 3:59 ` Paul Turner
2011-02-25 3:41 ` Paul Turner
2011-02-25 3:10 ` Paul Turner
2011-02-25 13:58 ` Bharata B Rao
2011-02-25 20:51 ` Paul Turner
2011-02-28 3:50 ` Bharata B Rao
2011-02-28 6:38 ` Paul Turner
2011-02-28 13:48 ` Peter Zijlstra
2011-03-01 8:31 ` Paul Turner
2011-03-02 7:23 ` Bharata B Rao
2011-03-02 8:05 ` Paul Turner
2011-02-16 3:18 ` [CFS Bandwidth Control v4 4/7] sched: unthrottle cfs_rq(s) who ran out of quota at period refresh Paul Turner
2011-02-18 7:19 ` Balbir Singh
2011-02-18 8:10 ` Bharata B Rao
2011-02-23 12:23 ` Peter Zijlstra
2011-02-23 13:32 ` Peter Zijlstra
2011-02-24 7:04 ` Bharata B Rao
2011-02-24 11:14 ` Peter Zijlstra
2011-02-26 0:02 ` Paul Turner
2011-02-16 3:18 ` [CFS Bandwidth Control v4 5/7] sched: add exports tracking cfs bandwidth control statistics Paul Turner
2011-02-22 3:14 ` Balbir Singh
2011-02-22 4:13 ` Bharata B Rao
2011-02-22 4:40 ` Balbir Singh
2011-02-23 8:03 ` Paul Turner
2011-02-23 10:13 ` Balbir Singh
2011-02-23 13:32 ` Peter Zijlstra
2011-02-25 3:26 ` Paul Turner
2011-02-25 8:54 ` Peter Zijlstra
2011-02-16 3:18 ` [CFS Bandwidth Control v4 6/7] sched: hierarchical task accounting for SCHED_OTHER Paul Turner
2011-02-22 3:17 ` Balbir Singh
2011-02-23 8:05 ` Paul Turner
2011-02-23 2:02 ` Hidetoshi Seto
2011-02-23 2:20 ` Paul Turner
2011-02-23 2:43 ` Balbir Singh
2011-02-23 13:32 ` Peter Zijlstra
2011-02-25 3:25 ` Paul Turner
2011-02-25 12:17 ` Peter Zijlstra
2011-02-16 3:18 ` [CFS Bandwidth Control v4 7/7] sched: add documentation for bandwidth control Paul Turner
2011-02-21 2:47 ` [CFS Bandwidth Control v4 0/7] Introduction Xiao Guangrong
2011-02-22 10:28 ` Bharata B Rao
2011-02-23 7:42 ` Paul Turner
2011-02-23 7:51 ` Balbir Singh
2011-02-23 7:56 ` Paul Turner
2011-02-23 8:31 ` Bharata B Rao
[not found] ` <20110224161111.7d83a884@jacob-laptop>
2011-02-25 10:03 ` Paul Turner
2011-02-25 13:06 ` jacob pan
2011-03-08 3:57 ` Balbir Singh
2011-03-08 18:18 ` Jacob Pan
2011-03-09 10:12 ` Paul Turner
2011-03-09 21:57 ` jacob pan
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