From: Alex Shi <alex.shi@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Paul Turner" <pjt@google.com>, "Ingo Molnar" <mingo@redhat.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Borislav Petkov" <bp@alien8.de>,
"Namhyung Kim" <namhyung@kernel.org>,
"Mike Galbraith" <efault@gmx.de>,
"Morten Rasmussen" <morten.rasmussen@arm.com>,
"Vincent Guittot" <vincent.guittot@linaro.org>,
"Preeti U Murthy" <preeti@linux.vnet.ibm.com>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
LKML <linux-kernel@vger.kernel.org>,
"Mel Gorman" <mgorman@suse.de>, "Rik van Riel" <riel@redhat.com>,
"Michael Wang" <wangyun@linux.vnet.ibm.com>,
"Jason Low" <jason.low2@hp.com>,
"Changlong Xie" <changlongx.xie@intel.com>,
sgruszka@redhat.com, "Frédéric Weisbecker" <fweisbec@gmail.com>
Subject: Re: [patch v8 9/9] sched/tg: remove blocked_load_avg in balance
Date: Wed, 19 Jun 2013 17:49:24 +0800 [thread overview]
Message-ID: <51C17EA4.3030401@intel.com> (raw)
In-Reply-To: <20130617140100.GZ3204@twins.programming.kicks-ass.net>
On 06/17/2013 10:01 PM, Peter Zijlstra wrote:
> On Mon, Jun 17, 2013 at 05:20:46AM -0700, Paul Turner wrote:
>> > On Fri, Jun 7, 2013 at 12:20 AM, Alex Shi <alex.shi@intel.com> wrote:
>>> > > blocked_load_avg sometime is too heavy and far bigger than runnable load
>>> > > avg, that make balance make wrong decision. So remove it.
>> >
>> > Ok so this is going to have terrible effects on the correctness of
>> > shares distribution; I'm fairly opposed to it in its present form.
> Should someone take a look at the LTP cgroup tests to make sure they
> cover this properly?
Seems I have no time on this in near future. :(
But I were you, I would picked up this patch, since
1, it is simple and easy revert.
2, it wins in testing.
3, it will motivate Paul to look into this problem. ;)
--
Thanks
Alex
next prev parent reply other threads:[~2013-06-19 9:50 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-07 7:20 [patch 0/9] sched: use runnable load avg in balance Alex Shi
2013-06-07 7:20 ` [patch v8 1/9] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" Alex Shi
2013-06-07 7:20 ` [patch v8 2/9] sched: move few runnable tg variables into CONFIG_SMP Alex Shi
2013-06-17 12:26 ` Paul Turner
2013-06-17 15:32 ` Alex Shi
2013-06-07 7:20 ` [patch v8 3/9] sched: set initial value of runnable avg for new forked task Alex Shi
2013-06-10 1:51 ` Gu Zheng
2013-06-14 10:02 ` Lei Wen
2013-06-14 13:59 ` Alex Shi
2013-06-15 12:09 ` Lei Wen
2013-06-17 0:33 ` Alex Shi
2013-06-20 10:23 ` Morten Rasmussen
2013-06-21 2:57 ` Lei Wen
2013-06-17 9:20 ` Peter Zijlstra
2013-06-17 12:26 ` Lei Wen
2013-06-17 12:33 ` Peter Zijlstra
2013-06-14 11:09 ` Paul Turner
2013-06-14 14:16 ` Alex Shi
2013-06-17 9:21 ` Peter Zijlstra
2013-06-17 9:39 ` Paul Turner
2013-06-17 13:00 ` Peter Zijlstra
2013-06-17 9:57 ` Alex Shi
2013-06-17 13:07 ` Peter Zijlstra
2013-06-17 13:23 ` Alex Shi
2013-06-07 7:20 ` [patch v8 4/9] sched: fix slept time double counting in enqueue entity Alex Shi
2013-06-17 11:51 ` Paul Turner
2013-06-17 15:41 ` Alex Shi
2013-06-20 1:43 ` Lei Wen
2013-06-20 1:46 ` Alex Shi
2013-06-20 2:46 ` Lei Wen
2013-06-20 14:59 ` Alex Shi
2013-06-21 2:30 ` Lei Wen
2013-06-21 2:39 ` Alex Shi
2013-06-21 2:50 ` Lei Wen
2013-06-21 8:56 ` Alex Shi
2013-06-21 9:18 ` Lei Wen
2013-06-21 11:09 ` Alex Shi
2013-06-21 13:26 ` Lei Wen
2013-06-07 7:20 ` [patch v8 5/9] sched: update cpu load after task_tick Alex Shi
2013-06-17 11:54 ` Paul Turner
2013-06-07 7:20 ` [patch v8 6/9] sched: compute runnable load avg in cpu_load and cpu_avg_load_per_task Alex Shi
2013-06-10 1:49 ` Gu Zheng
2013-06-10 2:01 ` Alex Shi
2013-06-10 2:05 ` Gu Zheng
2013-06-17 10:51 ` Paul Turner
2013-06-17 12:17 ` Paul Turner
2013-06-17 13:39 ` Peter Zijlstra
2013-06-17 13:59 ` Alex Shi
2013-06-17 13:57 ` Alex Shi
2013-06-17 23:00 ` Paul Turner
2013-06-18 3:44 ` Alex Shi
2013-06-18 9:44 ` Alex Shi
2013-06-19 8:15 ` Alex Shi
2013-06-20 0:33 ` Alex Shi
2013-06-17 14:57 ` Alex Shi
2013-06-17 15:21 ` Alex Shi
2013-06-07 7:20 ` [patch v8 7/9] math64: add div64_ul macro Alex Shi
2013-06-07 7:20 ` [patch v8 8/9] sched: consider runnable load average in move_tasks Alex Shi
2013-06-17 10:58 ` Paul Turner
2013-06-17 14:01 ` Alex Shi
2013-06-17 14:15 ` Alex Shi
2013-06-17 13:59 ` Peter Zijlstra
2013-06-17 14:29 ` Alex Shi
2013-06-07 7:20 ` [patch v8 9/9] sched/tg: remove blocked_load_avg in balance Alex Shi
2013-06-17 9:38 ` Peter Zijlstra
2013-06-17 12:20 ` Paul Turner
2013-06-17 14:01 ` Peter Zijlstra
2013-06-19 9:49 ` Alex Shi [this message]
2013-06-20 1:33 ` Alex Shi
2013-06-08 2:37 ` [patch 0/9] sched: use runnable load avg " Alex Shi
2013-06-10 1:35 ` Alex Shi
2013-06-10 15:01 ` Peter Zijlstra
2013-06-11 3:30 ` Alex Shi
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