From: Jason Low <jason.low2@hp.com>
To: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
Mike Galbraith <efault@gmx.de>,
Thomas Gleixner <tglx@linutronix.de>,
Paul Turner <pjt@google.com>, Alex Shi <alex.shi@intel.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Namhyung Kim <namhyung@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Kees Cook <keescook@chromium.org>, Mel Gorman <mgorman@suse.de>,
Rik van Riel <riel@redhat.com>,
aswin@hp.com, scott.norton@hp.com, chegu_vinod@hp.com,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Subject: Re: [RFC PATCH v2] sched: Limit idle_balance()
Date: Mon, 22 Jul 2013 10:42:23 -0700 [thread overview]
Message-ID: <1374514943.7608.25.camel@j-VirtualBox> (raw)
In-Reply-To: <51EC1B38.8000708@linux.vnet.ibm.com>
On Sun, 2013-07-21 at 23:02 +0530, Preeti U Murthy wrote:
> Hi Json,
>
> With V2 of your patch here are the results for the ebizzy run on
> 3.11-rc1 + patch on a 1 socket, 16 core powerpc machine. Each ebizzy
> run was for 30 seconds.
>
> Number_of_threads %improvement_with_patch
> 4 8.63
> 8 1.29
> 12 9.98
> 16 20.46
>
> Let me know if you want me to profile any of these runs for specific
> statistics.
Hi Preeti,
Other numbers that would be interesting to know are the % improvements
when N = 20. That is when I'm getting the bigger performance boosts on
some of the AIM7 workloads.
Would you like to re-run ebizzy with v2 of my patch except replacing
this line of code:
if (idle_duration / 10 < (sd->avg_idle_balance_cost + cost))
with this line of code:
if (idle_duration / 20 < (sd->avg_idle_balance_cost + cost))
Thanks a lot,
Jason
next prev parent reply other threads:[~2013-07-22 17:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-19 7:50 [RFC PATCH v2] sched: Limit idle_balance() Jason Low
2013-07-19 11:24 ` Preeti U Murthy
2013-07-19 19:28 ` Jason Low
2013-07-21 17:32 ` Preeti U Murthy
2013-07-22 17:42 ` Jason Low [this message]
2013-07-22 7:01 ` Srikar Dronamraju
2013-07-22 18:57 ` Jason Low
2013-07-23 11:03 ` Peter Zijlstra
2013-07-24 7:06 ` Jason Low
2013-07-23 11:06 ` Srikar Dronamraju
2013-07-23 12:05 ` Peter Zijlstra
2013-07-23 12:33 ` Mike Galbraith
2013-07-24 4:24 ` Jason Low
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