From: Peter Zijlstra <peterz@infradead.org>
To: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>,
"mingo@kernel.org" <mingo@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"preeti@linux.vnet.ibm.com" <preeti@linux.vnet.ibm.com>,
"kamalesh@linux.vnet.ibm.com" <kamalesh@linux.vnet.ibm.com>,
"riel@redhat.com" <riel@redhat.com>,
"efault@gmx.de" <efault@gmx.de>,
"nicolas.pitre@linaro.org" <nicolas.pitre@linaro.org>,
Dietmar Eggemann <Dietmar.Eggemann@arm.com>,
"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>
Subject: Re: [PATCH RESEND v9 00/10] sched: consolidation of CPU capacity and usage
Date: Fri, 20 Feb 2015 12:34:47 +0100 [thread overview]
Message-ID: <20150220113447.GO5029@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20150219124940.GA22059@e105550-lin.cambridge.arm.com>
On Thu, Feb 19, 2015 at 12:49:40PM +0000, Morten Rasmussen wrote:
> Also, it still not clear why patch 10 uses relative capacity reduction
> instead of absolute capacity available to CFS tasks.
As present in your asymmetric big and small systems? Yes it would be
unfortunate to migrate a task to an idle small core when the big core is
still faster, even if reduced by rt/irq work.
next prev parent reply other threads:[~2015-02-20 11:34 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-15 10:09 [PATCH RESEND v9 00/10] sched: consolidation of CPU capacity and usage Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 01/10] sched: add utilization_avg_contrib Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 02/10] sched: Track group sched_entity usage contributions Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 03/10] sched: remove frequency scaling from cpu_capacity Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 04/10] sched: Make sched entity usage tracking scale-invariant Vincent Guittot
2015-02-19 16:34 ` Peter Zijlstra
2015-02-19 17:02 ` Morten Rasmussen
2015-02-19 17:05 ` Peter Zijlstra
2015-02-20 9:21 ` Morten Rasmussen
2015-01-15 10:09 ` [PATCH RESEND v9 05/10] sched: make scale_rt invariant with frequency Vincent Guittot
2015-02-19 16:52 ` Peter Zijlstra
2015-02-19 17:18 ` Morten Rasmussen
2015-02-24 10:21 ` Vincent Guittot
2015-02-24 11:33 ` Dietmar Eggemann
2015-01-15 10:09 ` [PATCH RESEND v9 06/10] sched: add per rq cpu_capacity_orig Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 07/10] sched: get CPU's usage statistic Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 08/10] sched: replace capacity_factor by usage Vincent Guittot
2015-02-20 11:14 ` Peter Zijlstra
2015-02-20 13:31 ` Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 09/10] sched: add SD_PREFER_SIBLING for SMT level Vincent Guittot
2015-01-15 10:09 ` [PATCH RESEND v9 10/10] sched: move cfs task on a CPU with higher capacity Vincent Guittot
2015-02-20 11:27 ` Peter Zijlstra
2015-02-20 13:54 ` Vincent Guittot
2015-02-20 16:26 ` Peter Zijlstra
2015-02-19 12:49 ` [PATCH RESEND v9 00/10] sched: consolidation of CPU capacity and usage Morten Rasmussen
2015-02-20 11:34 ` Peter Zijlstra [this message]
2015-02-20 11:52 ` Morten Rasmussen
2015-02-20 14:13 ` Vincent Guittot
2015-02-20 14:35 ` Morten Rasmussen
2015-02-20 14:54 ` Vincent Guittot
2015-02-23 15:45 ` Morten Rasmussen
2015-02-24 10:38 ` Vincent Guittot
2015-02-24 11:29 ` Morten Rasmussen
2015-02-24 12:18 ` Vincent Guittot
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