From: Alex Shi <alex.shi@intel.com>
To: Alex Shi <alex.shi@intel.com>
Cc: torvalds@linux-foundation.org, mingo@redhat.com,
peterz@infradead.org, 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, morten.rasmussen@arm.com
Subject: Re: [patch v5 0/15] power aware scheduling
Date: Mon, 18 Feb 2013 15:44:04 +0800 [thread overview]
Message-ID: <5121DBC4.9070601@intel.com> (raw)
In-Reply-To: <1361164062-20111-1-git-send-email-alex.shi@intel.com>
On 02/18/2013 01:07 PM, Alex Shi wrote:
> Since the simplification of fork/exec/wake balancing has much arguments,
> I removed that part in the patch set.
>
> This patch set implement/consummate the rough power aware scheduling
> proposal: https://lkml.org/lkml/2012/8/13/139.
Just review the great summary of the conversation on this proposal.
http://lwn.net/Articles/512487/
One of advantage of this patch is that it bases on the general sched
domain/groups architecture, so, if other hardware platforms, like ARM,
has different hardware setting, it can be represented as specific domain
flags. and then be treated specific in scheduling. The scheduling is
natural and easy to expend to that.
And guess the big.LITTLE arch also can be represented by cpu power, if
so, the 'balance' policy just fit them since it judges if the sched
domain/group is full by domain/group's capacity.
Also adding a answer for policy automatic change feature:
---
The 'balance/powersaving' is automatic power friendly scheduling, since
system will auto bypass power scheduling when cpus utilisation in a
sched domain is beyond the domain's cpu weight (powersaving) or beyond
the domain's capacity (balance).
There is no always enabled power scheduling, since the patchset bases on
'race to idle'.
--
Thanks Alex
next prev parent reply other threads:[~2013-02-18 7:44 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-18 5:07 [patch v5 0/15] power aware scheduling Alex Shi
2013-02-18 5:07 ` [patch v5 01/15] sched: set initial value for runnable avg of sched entities Alex Shi
2013-02-18 8:28 ` Joonsoo Kim
2013-02-18 9:16 ` Alex Shi
2013-02-18 5:07 ` [patch v5 02/15] sched: set initial load avg of new forked task Alex Shi
2013-02-20 6:20 ` Alex Shi
2013-02-24 10:57 ` Preeti U Murthy
2013-02-25 6:00 ` Alex Shi
2013-02-28 7:03 ` Preeti U Murthy
2013-02-25 7:12 ` Alex Shi
2013-02-18 5:07 ` [patch v5 03/15] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" Alex Shi
2013-02-18 5:07 ` [patch v5 04/15] sched: add sched balance policies in kernel Alex Shi
2013-02-20 9:37 ` Ingo Molnar
2013-02-20 13:40 ` Alex Shi
2013-02-20 15:41 ` Ingo Molnar
2013-02-21 1:43 ` Alex Shi
2013-02-18 5:07 ` [patch v5 05/15] sched: add sysfs interface for sched_balance_policy selection Alex Shi
2013-02-18 5:07 ` [patch v5 06/15] sched: log the cpu utilization at rq Alex Shi
2013-02-20 9:30 ` Peter Zijlstra
2013-02-20 12:09 ` Preeti U Murthy
2013-02-20 13:34 ` Peter Zijlstra
2013-02-20 14:36 ` Alex Shi
2013-02-20 14:33 ` Alex Shi
2013-02-20 15:20 ` Peter Zijlstra
2013-02-21 1:35 ` Alex Shi
2013-02-20 15:22 ` Peter Zijlstra
2013-02-25 2:26 ` Alex Shi
2013-03-22 8:49 ` Alex Shi
2013-02-20 12:19 ` Preeti U Murthy
2013-02-20 12:39 ` Alex Shi
2013-02-18 5:07 ` [patch v5 07/15] sched: add new sg/sd_lb_stats fields for incoming fork/exec/wake balancing Alex Shi
2013-02-20 9:38 ` Peter Zijlstra
2013-02-20 12:27 ` Alex Shi
2013-02-18 5:07 ` [patch v5 08/15] sched: move sg/sd_lb_stats struct ahead Alex Shi
2013-02-18 5:07 ` [patch v5 09/15] sched: add power aware scheduling in fork/exec/wake Alex Shi
2013-02-20 9:42 ` Peter Zijlstra
2013-02-20 12:09 ` Alex Shi
2013-02-20 13:36 ` Peter Zijlstra
2013-02-20 14:23 ` Alex Shi
2013-02-21 13:33 ` Peter Zijlstra
2013-02-21 14:40 ` Alex Shi
2013-02-22 8:54 ` Peter Zijlstra
2013-02-24 9:27 ` Alex Shi
2013-02-24 9:49 ` Preeti U Murthy
2013-02-24 11:55 ` Alex Shi
2013-02-24 17:51 ` Preeti U Murthy
2013-02-25 2:23 ` Alex Shi
2013-02-25 3:23 ` Mike Galbraith
2013-02-25 9:53 ` Alex Shi
2013-02-25 10:30 ` Mike Galbraith
2013-02-18 5:07 ` [patch v5 10/15] sched: packing transitory tasks in wake/exec power balancing Alex Shi
2013-02-18 8:44 ` Joonsoo Kim
2013-02-18 8:56 ` Alex Shi
2013-02-20 5:55 ` Alex Shi
2013-02-20 7:40 ` Mike Galbraith
2013-02-20 8:11 ` Alex Shi
2013-02-20 8:43 ` Mike Galbraith
2013-02-20 8:54 ` Alex Shi
2013-02-18 5:07 ` [patch v5 11/15] sched: add power/performance balance allow flag Alex Shi
2013-02-20 9:48 ` Peter Zijlstra
2013-02-20 12:04 ` Alex Shi
2013-02-20 13:37 ` Peter Zijlstra
2013-02-20 13:48 ` Peter Zijlstra
2013-02-20 14:08 ` Alex Shi
2013-02-20 13:52 ` Alex Shi
2013-02-20 12:12 ` Borislav Petkov
2013-02-20 14:20 ` Alex Shi
2013-02-20 15:22 ` Borislav Petkov
2013-02-21 1:32 ` Alex Shi
2013-02-21 9:42 ` Borislav Petkov
2013-02-21 14:52 ` Alex Shi
2013-02-18 5:07 ` [patch v5 12/15] sched: pull all tasks from source group Alex Shi
2013-02-18 5:07 ` [patch v5 13/15] sched: no balance for prefer_sibling in power scheduling Alex Shi
2013-02-18 5:07 ` [patch v5 14/15] sched: power aware load balance Alex Shi
2013-03-20 4:57 ` Preeti U Murthy
2013-03-21 7:43 ` Alex Shi
2013-03-21 8:41 ` Preeti U Murthy
2013-03-21 9:27 ` Alex Shi
2013-03-21 10:27 ` Preeti U Murthy
2013-03-22 1:30 ` Alex Shi
2013-03-22 5:14 ` Preeti U Murthy
2013-03-25 4:52 ` Alex Shi
2013-03-29 12:42 ` Preeti U Murthy
2013-03-29 13:39 ` Alex Shi
2013-03-30 11:25 ` Preeti U Murthy
2013-03-30 14:04 ` Alex Shi
2013-03-30 15:31 ` Preeti U Murthy
2013-02-18 5:07 ` [patch v5 15/15] sched: lazy power balance Alex Shi
2013-02-18 7:44 ` Alex Shi [this message]
2013-02-19 12:08 ` [patch v5 0/15] power aware scheduling Paul Turner
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