From: Peter Zijlstra <peterz@infradead.org>
To: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Yuyang Du <yuyang.du@intel.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: Wed, 30 Jul 2014 12:21:28 +0200 [thread overview]
Message-ID: <20140730102128.GJ19379@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20140730101331.GB15761@e103687>
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On Wed, Jul 30, 2014 at 11:13:31AM +0100, Morten Rasmussen wrote:
> It is a very real problem when user-space uses priorities extensively
> like Android does. Tasks related to audio run at very high priorities
> but only for a very short amount of time, but due the to priority
> scaling their load ends up being several times higher than tasks running
> all the time at normal priority. Hence task load is a very poor
> indicator of utilization.
FWIW Android (which I think does this through binder) is utterly insane
in this regard. But yes, we have to live with it.
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next prev parent reply other threads:[~2014-07-30 10:21 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
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 [this message]
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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