From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Youquan Song <youquan.song@intel.com>,
linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de,
hpa@zytor.com, akpm@linux-foundation.org, stable@vger.kernel.org,
suresh.b.siddha@intel.com, arjan@linux.intel.com,
len.brown@intel.com, anhua.xu@intel.com, chaohong.guo@intel.com,
Youquan Song <youquan.song@linux.intel.com>,
Paul Turner <pjt@google.com>
Subject: Re: [PATCH] x86,sched: Fix sched_smt_power_savings totally broken
Date: Mon, 09 Jan 2012 15:46:07 +0100 [thread overview]
Message-ID: <1326120367.2442.84.camel@twins> (raw)
In-Reply-To: <CAKfTPtDM-L-AcHr_o44vmR9VYRvQqOyXuwEgnZ61d4pbDOPFUg@mail.gmail.com>
On Mon, 2012-01-09 at 15:29 +0100, Vincent Guittot wrote:
> I'm also using sched_mc level for doing powersaving load balance on
> ARM platform and we have real benefits.
Right, I've never said that power aware balancing was without merit, I
know it matters (quite a lot for some).
> We might modify the way we choose between power or performance mode
> because it's not always a matter of gathering or spreading tasks on
> cpus but until we found a best interface it's the way to enable
> powersaving mode
Sure, it was the only interface available.
But I really want to get rid of the topology based knobs we have now,
preferably I even want to get rid of the multi-value thing.
pjt still needs to post his linsched rework *poke* *poke*, that should
give a good basis to rework most of this without regressing the world
and then some.
But even without that I think we can do better than we do currently.
next prev parent reply other threads:[~2012-01-09 14:46 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-09 8:56 [PATCH] x86,sched: Fix sched_smt_power_savings totally broken Youquan Song
2012-01-09 10:06 ` Peter Zijlstra
2012-01-09 10:28 ` Peter Zijlstra
2012-01-09 10:30 ` Peter Zijlstra
2012-01-09 11:00 ` Vaidyanathan Srinivasan
2012-01-09 14:35 ` Peter Zijlstra
2012-01-09 16:03 ` Vaidyanathan Srinivasan
2012-01-09 16:13 ` Peter Zijlstra
2012-01-09 17:05 ` Vaidyanathan Srinivasan
2012-01-09 14:13 ` Arjan van de Ven
2012-05-18 10:19 ` [tip:sched/core] sched: Remove stale power aware scheduling remnants and dysfunctional knobs tip-bot for Peter Zijlstra
2012-01-10 0:14 ` [PATCH] x86,sched: Fix sched_smt_power_savings totally broken Youquan Song
2012-01-09 11:05 ` Peter Zijlstra
2012-01-10 5:58 ` Youquan Song
2012-01-09 23:52 ` Suresh Siddha
2012-01-10 9:18 ` Ingo Molnar
2012-01-10 14:32 ` Arjan van de Ven
2012-01-10 14:41 ` Peter Zijlstra
2012-01-10 14:54 ` Arjan van de Ven
2012-01-10 15:32 ` Vincent Guittot
2012-01-10 15:32 ` Vincent Guittot
2012-01-10 16:49 ` Vaidyanathan Srinivasan
2012-01-10 19:41 ` Ingo Molnar
2012-01-10 19:44 ` Ingo Molnar
2012-01-10 16:54 ` Youquan Song
2012-01-10 16:51 ` Vaidyanathan Srinivasan
2012-01-10 19:01 ` Suresh Siddha
2012-01-11 3:52 ` Vaidyanathan Srinivasan
2012-01-11 17:37 ` Youquan Song
2012-01-10 16:44 ` Vaidyanathan Srinivasan
2012-01-09 11:12 ` Peter Zijlstra
2012-01-09 14:29 ` Vincent Guittot
2012-01-09 14:29 ` Vincent Guittot
2012-01-09 14:46 ` Peter Zijlstra [this message]
2012-01-10 2:12 ` Indan Zupancic
2012-01-10 9:26 ` Peter Zijlstra
2012-01-10 1:54 ` Suresh Siddha
2012-01-10 8:08 ` Vincent Guittot
2012-01-09 15:37 ` Greg KH
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