From: Peter Zijlstra <peterz@infradead.org>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>,
"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
Nicolas Pitre <nicolas.pitre@linaro.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
Alex Shi <alex.shi@linaro.org>,
Morten Rasmussen <morten.rasmussen@arm.com>
Subject: Re: [RFC PATCHC 0/3] sched/idle : find the idlest cpu with cpuidle info
Date: Tue, 15 Apr 2014 15:13:11 +0200 [thread overview]
Message-ID: <20140415131311.GM11182@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAKfTPtCH0AhxM8TUeqjnnFVmpLd1D39B4gV2SaWmHX21iLNVuA@mail.gmail.com>
On Tue, Apr 01, 2014 at 11:05:16AM +0200, Vincent Guittot wrote:
> >> We are working on a bench which can generate middle load pattern with
> >> idle CPUs but it's not available yet. In the mean time, one bench that
> >> plays with idle time is cyclictest, it will not give you performance
> >> results but only scheduling latency which might be what you are
> >> looking for.
> >
> >
> > Yeah, thanks. I believe I know what is in the rt-tests package :)
> >
> > What I meant is what kind of values would you like to see with this patchset
> > ?
>
> IIUC, you patch tries to improve the wake up latency of a task by
> selecting the CPUs with the shallowest C-state, so this metrics seems
> to be a good candidate
cyclic-test might be too regular to really measure anything though.
next prev parent reply other threads:[~2014-04-15 13:13 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-28 12:29 Daniel Lezcano
2014-03-28 12:29 ` [RFC PATCHC 1/3] cpuidle: encapsulate power info in a separate structure Daniel Lezcano
2014-03-28 18:17 ` Nicolas Pitre
2014-03-28 20:42 ` Daniel Lezcano
2014-03-29 0:00 ` Nicolas Pitre
2014-03-28 12:29 ` [RFC PATCHC 2/3] idle: store the idle state the cpu is Daniel Lezcano
2014-04-15 12:43 ` Peter Zijlstra
2014-04-15 12:44 ` Peter Zijlstra
2014-04-15 14:17 ` Daniel Lezcano
2014-04-15 14:33 ` Peter Zijlstra
2014-04-15 14:39 ` Daniel Lezcano
2014-03-28 12:29 ` [RFC PATCHC 3/3] sched/fair: use the idle state info to choose the idlest cpu Daniel Lezcano
2014-04-02 3:05 ` Nicolas Pitre
2014-04-04 11:57 ` Rafael J. Wysocki
2014-04-04 16:56 ` Nicolas Pitre
2014-04-05 2:01 ` Rafael J. Wysocki
2014-04-17 13:53 ` Daniel Lezcano
2014-04-17 14:47 ` Peter Zijlstra
2014-04-17 15:03 ` Daniel Lezcano
2014-04-18 8:09 ` Ingo Molnar
2014-04-18 8:36 ` Daniel Lezcano
2014-04-17 15:53 ` Nicolas Pitre
2014-04-17 16:05 ` Daniel Lezcano
2014-04-17 16:21 ` Nicolas Pitre
2014-04-18 9:38 ` Peter Zijlstra
2014-04-18 12:13 ` Daniel Lezcano
2014-04-18 12:53 ` Peter Zijlstra
2014-04-18 13:04 ` Daniel Lezcano
2014-04-18 16:00 ` Nicolas Pitre
2014-04-15 13:03 ` Peter Zijlstra
2014-03-31 13:52 ` [RFC PATCHC 0/3] sched/idle : find the idlest cpu with cpuidle info Vincent Guittot
2014-03-31 15:55 ` Daniel Lezcano
2014-04-01 7:16 ` Vincent Guittot
2014-04-01 7:43 ` Daniel Lezcano
2014-04-01 9:05 ` Vincent Guittot
2014-04-15 13:13 ` Peter Zijlstra [this message]
2014-04-01 23:01 ` Rafael J. Wysocki
2014-04-02 3:14 ` Nicolas Pitre
2014-04-04 11:43 ` Rafael J. Wysocki
2014-04-15 13:17 ` Peter Zijlstra
2014-04-15 13:25 ` Peter Zijlstra
2014-04-15 15:27 ` Nicolas Pitre
2014-04-15 15:33 ` Rafael J. Wysocki
2014-04-02 8:26 ` Daniel Lezcano
2014-04-04 11:23 ` Rafael J. Wysocki
2014-04-04 6:29 ` Len Brown
2014-04-04 8:16 ` Daniel Lezcano
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140415131311.GM11182@twins.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=alex.shi@linaro.org \
--cc=daniel.lezcano@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=morten.rasmussen@arm.com \
--cc=nicolas.pitre@linaro.org \
--cc=rjw@rjwysocki.net \
--cc=vincent.guittot@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®