From: Yuyang Du <yuyang.du@intel.com>
To: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"mingo@kernel.org" <mingo@kernel.org>,
"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
"vincent.guittot@linaro.org" <vincent.guittot@linaro.org>,
"daniel.lezcano@linaro.org" <daniel.lezcano@linaro.org>,
"preeti@linux.vnet.ibm.com" <preeti@linux.vnet.ibm.com>,
Dietmar Eggemann <Dietmar.Eggemann@arm.com>,
"pjt@google.com" <pjt@google.com>
Subject: Re: [RFCv2 PATCH 00/23] sched: Energy cost model for energy-aware scheduling
Date: Tue, 8 Jul 2014 08:23:43 +0800 [thread overview]
Message-ID: <20140708002343.GC25653@intel.com> (raw)
In-Reply-To: <20140707141627.GB4485@e103687>
Hi Morten,
On Mon, Jul 07, 2014 at 03:16:27PM +0100, Morten Rasmussen wrote:
> Could you elaborate on what you mean by 'a general statement'?
The general statement is: higher freq, more cap, and more power. More specific
numbers are not needed, as they are just instances of this general statement.
> cpu_power doesn't tell you anything about energy-efficiency. There is no
> link with frequency scaling.
In general, more cpu_power, more freq, less energy-efficiency, as you said sometime ago.
> No representation of power domains.
Represented by CPU topology?
Thanks,
Yuyang
next prev parent reply other threads:[~2014-07-08 0:23 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-03 16:25 [RFCv2 PATCH 00/23] sched: Energy cost model for energy-aware scheduling Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 01/23] sched: Documentation for scheduler energy cost model Morten Rasmussen
2014-07-24 0:53 ` Rafael J. Wysocki
2014-07-24 7:26 ` Peter Zijlstra
2014-07-24 14:28 ` Rafael J. Wysocki
2014-07-24 17:57 ` Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 02/23] sched: Make energy awareness a sched feature Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 03/23] sched: Introduce energy data structures Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 04/23] sched: Allocate and initialize " Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 05/23] sched: Add energy procfs interface Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 06/23] arm: topology: Define TC2 energy and provide it to the scheduler Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 07/23] sched: Introduce system-wide sched_energy Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 08/23] sched: Aggregate unweighted load contributed by task entities on parenting cfs_rq Morten Rasmussen
2014-07-03 23:50 ` Yuyang Du
2014-07-03 16:25 ` [RFCv2 PATCH 09/23] sched: Maintain the unweighted load contribution of blocked entities Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 10/23] sched: Account for blocked unweighted load waking back up Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 11/23] sched: Introduce an unweighted cpu_load array Morten Rasmussen
2014-07-03 16:25 ` [RFCv2 PATCH 12/23] sched: Rename weighted_cpuload() to cpu_load() Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 13/23] sched: Introduce weighted/unweighted switch in load related functions Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 14/23] sched: Introduce SD_SHARE_CAP_STATES sched_domain flag Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 15/23] sched, cpufreq: Introduce current cpu compute capacity into scheduler Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 16/23] sched, cpufreq: Current compute capacity hack for ARM TC2 Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 17/23] sched: Likely idle state statistics placeholder Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 18/23] sched: Energy model functions Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 19/23] sched: Task wakeup tracking Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 20/23] sched: Take task wakeups into account in energy estimates Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 21/23] sched: Use energy model in select_idle_sibling Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 22/23] sched: Use energy to guide wakeup task placement Morten Rasmussen
2014-07-03 16:26 ` [RFCv2 PATCH 23/23] sched: Use energy model in load balance path Morten Rasmussen
2014-07-03 23:19 ` [RFCv2 PATCH 00/23] sched: Energy cost model for energy-aware scheduling Yuyang Du
2014-07-04 11:06 ` Morten Rasmussen
2014-07-04 16:03 ` Anca Emanuel
2014-07-06 19:05 ` Yuyang Du
2014-07-07 14:16 ` Morten Rasmussen
2014-07-08 0:23 ` Yuyang Du [this message]
2014-07-08 9:28 ` Morten Rasmussen
2014-07-04 16:55 ` Catalin Marinas
2014-07-07 14:00 ` Morten Rasmussen
2014-07-07 15:42 ` Peter Zijlstra
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