From: Alex Shi <alex.shi@intel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Len Brown <lenb@kernel.org>,
mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de,
akpm@linux-foundation.org, arjan@linux.intel.com, pjt@google.com,
namhyung@kernel.org, efault@gmx.de, morten.rasmussen@arm.com,
vincent.guittot@linaro.org, gregkh@linuxfoundation.org,
preeti@linux.vnet.ibm.com, viresh.kumar@linaro.org,
linux-kernel@vger.kernel.org, len.brown@intel.com,
rafael.j.wysocki@intel.com, jkosina@suse.cz,
clark.williams@gmail.com, tony.luck@intel.com,
keescook@chromium.org, mgorman@suse.de, riel@redhat.com,
Linux PM list <linux-pm@vger.kernel.org>
Subject: Re: [patch v7 0/21] sched: power aware scheduling
Date: Tue, 16 Apr 2013 08:22:19 +0800 [thread overview]
Message-ID: <516C99BB.30309@intel.com> (raw)
In-Reply-To: <20130415231206.GE12144@pd.tnic>
On 04/16/2013 07:12 AM, Borislav Petkov wrote:
> On Mon, Apr 15, 2013 at 09:50:22PM +0800, Alex Shi wrote:
>> For fairness and total threads consideration, powersaving cost quit
>> similar energy on kbuild benchmark, and even better.
>>
>> 17348.850 27400.458 15973.776
>> 13737.493 18487.248 12167.816
>
> Yeah, but those lines don't look good - powersaving needs more energy
> than performance.
>
> And what is even crazier is that fixed 1.2 GHz case. I'd guess in
> the normal case those cores are at triple the freq. - i.e. somewhere
> around 3-4 GHz. And yet, 1.2 GHz eats almost *double* the power than
> performance and powersaving.
yes, the max freq is 2.7 GHZ, plus boost.
>
> So for the x=8 and maybe even the x=16 case we're basically better off
> with performance.
>
> Or could it be that the power measurements are not really that accurate
> and those numbers above are not really correct?
testing has a little variation, but the power data is quite accurate. I
may change to packing tasks per cpu capacity than current cpu weight.
that should has better power efficient value.
>
> Hmm.
>
--
Thanks Alex
next prev parent reply other threads:[~2013-04-16 0:23 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-04 2:00 [patch v7 0/21] sched: power aware scheduling Alex Shi
2013-04-04 2:00 ` [patch v7 01/21] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" Alex Shi
2013-04-04 2:00 ` [patch v7 02/21] sched: set initial value of runnable avg for new forked task Alex Shi
2013-05-06 3:24 ` Preeti U Murthy
2013-04-04 2:00 ` [patch v7 03/21] sched: add sched balance policies in kernel Alex Shi
2013-04-04 2:00 ` [patch v7 04/21] sched: add sysfs interface for sched_balance_policy selection Alex Shi
2013-04-04 2:00 ` [patch v7 05/21] sched: log the cpu utilization at rq Alex Shi
2013-05-06 3:26 ` Preeti U Murthy
2013-05-06 5:22 ` Alex Shi
2013-05-06 12:03 ` Phil Carmody
2013-05-06 12:35 ` Alex Shi
2013-05-06 21:19 ` Paul Turner
2013-04-04 2:00 ` [patch v7 06/21] sched: add new sg/sd_lb_stats fields for incoming fork/exec/wake balancing Alex Shi
2013-04-04 2:00 ` [patch v7 07/21] sched: move sg/sd_lb_stats struct ahead Alex Shi
2013-04-04 2:00 ` [patch v7 08/21] sched: scale_rt_power rename and meaning change Alex Shi
2013-04-04 2:00 ` [patch v7 09/21] sched: get rq potential maximum utilization Alex Shi
2013-04-04 2:00 ` [patch v7 10/21] sched: add power aware scheduling in fork/exec/wake Alex Shi
2013-04-04 2:00 ` [patch v7 11/21] sched: add sched_burst_threshold_ns as wakeup burst indicator Alex Shi
2013-04-04 2:00 ` [patch v7 12/21] sched: using avg_idle to detect bursty wakeup Alex Shi
2013-04-04 2:00 ` [patch v7 13/21] sched: packing transitory tasks in wakeup power balancing Alex Shi
2013-04-04 2:00 ` [patch v7 14/21] sched: add power/performance balance allow flag Alex Shi
2013-04-04 2:00 ` [patch v7 15/21] sched: pull all tasks from source group Alex Shi
2013-04-04 5:59 ` Namhyung Kim
2013-04-06 11:49 ` Alex Shi
2013-04-04 2:00 ` [patch v7 16/21] sched: no balance for prefer_sibling in power scheduling Alex Shi
2013-05-06 3:26 ` Preeti U Murthy
2013-04-04 2:00 ` [patch v7 17/21] sched: add new members of sd_lb_stats Alex Shi
2013-04-04 2:00 ` [patch v7 18/21] sched: power aware load balance Alex Shi
2013-04-04 2:01 ` [patch v7 19/21] sched: lazy power balance Alex Shi
2013-04-04 2:01 ` [patch v7 20/21] sched: don't do power balance on share cpu power domain Alex Shi
2013-04-08 3:17 ` Preeti U Murthy
2013-04-08 3:25 ` Preeti U Murthy
2013-04-08 4:19 ` Alex Shi
2013-04-04 2:01 ` [patch v7 21/21] sched: make sure select_tas_rq_fair get a cpu Alex Shi
2013-04-11 21:02 ` [patch v7 0/21] sched: power aware scheduling Len Brown
2013-04-12 8:46 ` Alex Shi
2013-04-12 16:23 ` Borislav Petkov
2013-04-12 16:48 ` Mike Galbraith
2013-04-12 17:12 ` Borislav Petkov
2013-04-14 1:36 ` Alex Shi
2013-04-17 21:53 ` Len Brown
2013-04-18 1:51 ` Mike Galbraith
2013-04-26 15:11 ` Mike Galbraith
2013-04-30 5:16 ` Mike Galbraith
2013-04-30 8:30 ` Mike Galbraith
2013-04-30 8:41 ` Ingo Molnar
2013-04-30 9:35 ` Mike Galbraith
2013-04-30 9:49 ` Mike Galbraith
2013-04-30 9:56 ` Mike Galbraith
2013-05-17 8:06 ` Preeti U Murthy
2013-05-20 1:01 ` Alex Shi
2013-05-20 2:30 ` Preeti U Murthy
2013-04-14 1:28 ` Alex Shi
2013-04-14 5:10 ` Alex Shi
2013-04-14 15:59 ` Borislav Petkov
2013-04-15 6:04 ` Alex Shi
2013-04-15 6:16 ` Alex Shi
2013-04-15 9:52 ` Borislav Petkov
2013-04-15 13:50 ` Alex Shi
2013-04-15 23:12 ` Borislav Petkov
2013-04-16 0:22 ` Alex Shi [this message]
2013-04-16 10:24 ` Borislav Petkov
2013-04-17 1:18 ` Alex Shi
2013-04-17 7:38 ` Borislav Petkov
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=516C99BB.30309@intel.com \
--to=alex.shi@intel.com \
--cc=akpm@linux-foundation.org \
--cc=arjan@linux.intel.com \
--cc=bp@alien8.de \
--cc=clark.williams@gmail.com \
--cc=efault@gmx.de \
--cc=gregkh@linuxfoundation.org \
--cc=jkosina@suse.cz \
--cc=keescook@chromium.org \
--cc=len.brown@intel.com \
--cc=lenb@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mgorman@suse.de \
--cc=mingo@redhat.com \
--cc=morten.rasmussen@arm.com \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
--cc=pjt@google.com \
--cc=preeti@linux.vnet.ibm.com \
--cc=rafael.j.wysocki@intel.com \
--cc=riel@redhat.com \
--cc=tglx@linutronix.de \
--cc=tony.luck@intel.com \
--cc=vincent.guittot@linaro.org \
--cc=viresh.kumar@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.