From: Peter Zijlstra <peterz@infradead.org>
To: Yuyang Du <yuyang.du@intel.com>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"pjt@google.com" <pjt@google.com>,
"bsegall@google.com" <bsegall@google.com>,
"arjan.van.de.ven@intel.com" <arjan.van.de.ven@intel.com>,
"len.brown@intel.com" <len.brown@intel.com>,
"rafael.j.wysocki@intel.com" <rafael.j.wysocki@intel.com>,
"alan.cox@intel.com" <alan.cox@intel.com>,
"mark.gross@intel.com" <mark.gross@intel.com>,
"fengguang.wu@intel.com" <fengguang.wu@intel.com>
Subject: Re: [PATCH 0/2 v4] sched: Rewrite per entity runnable load average tracking
Date: Mon, 28 Jul 2014 12:38:12 +0200 [thread overview]
Message-ID: <20140728103812.GP6758@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20140727190237.GB22986@intel.com>
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On Mon, Jul 28, 2014 at 03:02:37AM +0800, Yuyang Du wrote:
> > Another thing that might be an issue is that the blocked of a terminated
> > task lives on for quite a while until has decayed away.
>
> Good point. To do so, if I read correctly, we need to hook do_exit(), but probably
> we are gonna encounter rq->lock issue.
>
> What is the opinion/guidance from the maintainers/others?
So the entire point of this per entity tracking was to make sure load
numbers reflect reality. We account migrations etc., it would be weird
to then throw all that out the window and let task exit accumulate crap.
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next prev parent reply other threads:[~2014-07-28 10:38 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-17 23:26 [PATCH 0/2 v4] sched: Rewrite per entity runnable load average tracking Yuyang Du
2014-07-17 23:26 ` [PATCH 1/2 v4] sched: Remove update_rq_runnable_avg Yuyang Du
2014-07-17 23:26 ` [PATCH 2/2 v4] sched: Rewrite per entity runnable load average tracking Yuyang Du
2014-07-18 9:43 ` Vincent Guittot
2014-07-27 17:36 ` Yuyang Du
2014-07-29 9:12 ` Vincent Guittot
2014-07-29 1:43 ` Yuyang Du
2014-07-29 13:17 ` Vincent Guittot
2014-07-29 22:27 ` Yuyang Du
2014-07-30 8:30 ` Peter Zijlstra
2014-07-30 0:40 ` Yuyang Du
2014-07-29 9:39 ` Peter Zijlstra
2014-07-29 1:53 ` Yuyang Du
2014-07-29 13:35 ` Peter Zijlstra
2014-07-29 15:55 ` Peter Zijlstra
2014-07-29 23:08 ` Yuyang Du
2014-07-31 9:40 ` Vincent Guittot
2014-07-31 9:56 ` [PATCH 2/2 v4] sched: Rewrite per entity runnable load average Vincent Guittot
2014-07-31 19:16 ` Yuyang Du
2014-08-01 9:28 ` Vincent Guittot
2014-07-28 10:48 ` [PATCH 2/2 v4] sched: Rewrite per entity runnable load average tracking Peter Zijlstra
2014-07-29 0:56 ` Yuyang Du
2014-07-29 13:15 ` Peter Zijlstra
2014-07-28 11:39 ` Peter Zijlstra
2014-07-29 1:09 ` Yuyang Du
2014-07-29 13:19 ` Peter Zijlstra
2014-07-28 12:01 ` Peter Zijlstra
2014-07-28 13:51 ` Peter Zijlstra
2014-07-28 16:58 ` bsegall
2014-07-28 17:19 ` Peter Zijlstra
2014-07-29 1:13 ` Yuyang Du
2014-07-18 15:39 ` [PATCH 0/2 " Morten Rasmussen
2014-07-27 19:02 ` Yuyang Du
2014-07-28 10:38 ` Peter Zijlstra [this message]
2014-07-29 1:17 ` Yuyang Du
2014-07-29 13:06 ` Peter Zijlstra
2014-07-30 10:13 ` Morten Rasmussen
2014-07-30 10:21 ` Peter Zijlstra
2014-07-30 10:57 ` Morten Rasmussen
2014-07-30 19:17 ` Yuyang Du
2014-07-31 8:54 ` Morten Rasmussen
2014-07-31 2:15 ` Yuyang Du
2014-07-20 5:46 ` Mike Galbraith
2014-07-27 19:34 ` Yuyang Du
2014-07-28 7:49 ` Mike Galbraith
2014-07-28 0:01 ` Yuyang Du
2014-07-28 8:55 ` Peter Zijlstra
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