From: Peter Zijlstra <peterz@infradead.org>
To: Alex Shi <alex.shi@intel.com>
Cc: torvalds@linux-foundation.org, mingo@redhat.com,
tglx@linutronix.de, akpm@linux-foundation.org,
arjan@linux.intel.com, bp@alien8.de, pjt@google.com,
namhyung@kernel.org, efault@gmx.de, vincent.guittot@linaro.org,
gregkh@linuxfoundation.org, preeti@linux.vnet.ibm.com,
viresh.kumar@linaro.org, linux-kernel@vger.kernel.org
Subject: Re: [patch v4 11/18] sched: log the cpu utilization at rq
Date: Tue, 12 Feb 2013 11:39:52 +0100 [thread overview]
Message-ID: <1360665592.4485.26.camel@laptop> (raw)
In-Reply-To: <1358996820-23036-12-git-send-email-alex.shi@intel.com>
On Thu, 2013-01-24 at 11:06 +0800, Alex Shi wrote:
>
> The cpu's utilization is to measure how busy is the cpu.
> util = cpu_rq(cpu)->avg.runnable_avg_sum
> / cpu_rq(cpu)->avg.runnable_avg_period;
>
> Since the util is no more than 1, we use its percentage value in later
> caculations. And set the the FULL_UTIL as 100%.
>
> In later power aware scheduling, we are sensitive for how busy of the
> cpu, not how much weight of its load. As to power consuming, it is more
> related with cpu busy time, not the load weight.
I think we can make that argument in general; that is irrespective of
the actual policy. We simply never had anything better to go with.
So please clarify why you think this only applies to power aware
scheduling.
next prev parent reply other threads:[~2013-02-12 10:39 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-24 3:06 [patch v4 0/18] sched: simplified fork, release load avg and power awareness scheduling Alex Shi
2013-01-24 3:06 ` [patch v4 01/18] sched: set SD_PREFER_SIBLING on MC domain to reduce a domain level Alex Shi
2013-02-12 10:11 ` Peter Zijlstra
2013-02-13 13:22 ` Alex Shi
2013-02-15 12:38 ` Peter Zijlstra
2013-02-16 5:16 ` Alex Shi
2013-02-13 14:17 ` Alex Shi
2013-01-24 3:06 ` [patch v4 02/18] sched: select_task_rq_fair clean up Alex Shi
2013-02-12 10:14 ` Peter Zijlstra
2013-02-13 14:44 ` Alex Shi
2013-01-24 3:06 ` [patch v4 03/18] sched: fix find_idlest_group mess logical Alex Shi
2013-02-12 10:16 ` Peter Zijlstra
2013-02-13 15:07 ` Alex Shi
2013-01-24 3:06 ` [patch v4 04/18] sched: don't need go to smaller sched domain Alex Shi
2013-01-24 3:06 ` [patch v4 05/18] sched: quicker balancing on fork/exec/wake Alex Shi
2013-02-12 10:22 ` Peter Zijlstra
2013-02-14 3:13 ` Alex Shi
2013-02-14 8:12 ` Preeti U Murthy
2013-02-14 14:08 ` Alex Shi
2013-02-15 13:00 ` Peter Zijlstra
2013-01-24 3:06 ` [patch v4 06/18] sched: give initial value for runnable avg of sched entities Alex Shi
2013-02-12 10:23 ` Peter Zijlstra
2013-01-24 3:06 ` [patch v4 07/18] sched: set initial load avg of new forked task Alex Shi
2013-02-12 10:26 ` Peter Zijlstra
2013-02-13 15:14 ` Alex Shi
2013-02-13 15:41 ` Paul Turner
2013-02-14 13:07 ` Alex Shi
2013-02-19 11:34 ` Paul Turner
2013-02-20 4:18 ` Preeti U Murthy
2013-02-20 5:13 ` Alex Shi
2013-01-24 3:06 ` [patch v4 08/18] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" Alex Shi
2013-02-12 10:27 ` Peter Zijlstra
2013-02-13 15:23 ` Alex Shi
2013-02-13 15:45 ` Paul Turner
2013-02-14 3:07 ` Preeti U Murthy
2013-01-24 3:06 ` [patch v4 09/18] sched: add sched_policies in kernel Alex Shi
2013-02-12 10:36 ` Peter Zijlstra
2013-02-13 15:41 ` Alex Shi
2013-01-24 3:06 ` [patch v4 10/18] sched: add sysfs interface for sched_policy selection Alex Shi
2013-01-24 3:06 ` [patch v4 11/18] sched: log the cpu utilization at rq Alex Shi
2013-02-12 10:39 ` Peter Zijlstra [this message]
2013-02-14 3:10 ` Alex Shi
2013-01-24 3:06 ` [patch v4 12/18] sched: add power aware scheduling in fork/exec/wake Alex Shi
2013-01-24 3:06 ` [patch v4 13/18] sched: packing small tasks in wake/exec balancing Alex Shi
2013-01-24 3:06 ` [patch v4 14/18] sched: add power/performance balance allowed flag Alex Shi
2013-01-24 3:06 ` [patch v4 15/18] sched: pull all tasks from source group Alex Shi
2013-01-24 3:06 ` [patch v4 16/18] sched: don't care if the local group has capacity Alex Shi
2013-01-24 3:06 ` [patch v4 17/18] sched: power aware load balance, Alex Shi
2013-01-24 3:07 ` [patch v4 18/18] sched: lazy power balance Alex Shi
2013-01-24 9:44 ` [patch v4 0/18] sched: simplified fork, release load avg and power awareness scheduling Borislav Petkov
2013-01-24 15:07 ` Alex Shi
2013-01-27 2:41 ` Alex Shi
2013-01-27 4:36 ` Mike Galbraith
2013-01-27 10:35 ` Borislav Petkov
2013-01-27 13:25 ` Alex Shi
2013-01-27 15:51 ` Mike Galbraith
2013-01-28 5:17 ` Mike Galbraith
2013-01-28 5:51 ` Alex Shi
2013-01-28 6:15 ` Mike Galbraith
2013-01-28 6:42 ` Mike Galbraith
2013-01-28 7:20 ` Mike Galbraith
2013-01-29 1:17 ` Alex Shi
2013-01-28 9:55 ` Borislav Petkov
2013-01-28 10:44 ` Mike Galbraith
2013-01-28 11:29 ` Borislav Petkov
2013-01-28 11:32 ` Mike Galbraith
2013-01-28 11:40 ` Mike Galbraith
2013-01-28 15:22 ` Borislav Petkov
2013-01-28 15:55 ` Mike Galbraith
2013-01-29 1:38 ` Alex Shi
2013-01-29 1:32 ` Alex Shi
2013-01-29 1:36 ` Alex Shi
2013-01-28 15:47 ` Mike Galbraith
2013-01-29 1:45 ` Alex Shi
2013-01-29 4:03 ` Mike Galbraith
2013-01-29 2:27 ` Alex Shi
2013-01-27 10:40 ` Borislav Petkov
2013-01-27 14:03 ` Alex Shi
2013-01-28 5:19 ` Alex Shi
2013-01-28 6:49 ` Mike Galbraith
2013-01-28 7:17 ` Alex Shi
2013-01-28 7:33 ` Mike Galbraith
2013-01-29 6:02 ` Alex Shi
2013-01-28 1:28 ` Alex Shi
2013-02-04 1:35 ` Alex Shi
2013-02-04 11:09 ` Ingo Molnar
2013-02-05 2:26 ` Alex Shi
2013-02-06 5:08 ` Alex Shi
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