linux-kernel - Re: [PATCH 00/46] Automatic NUMA Balancing V4

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Message-ID: <20121122090514.GA17769@gmail.com>
Date:	Thu, 22 Nov 2012 10:05:14 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Turner <pjt@...gle.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Alex Shi <lkml.alex@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/46] Automatic NUMA Balancing V4


* Ingo Molnar <mingo@...nel.org> wrote:

> 
> * Mel Gorman <mgorman@...e.de> wrote:
> 
> > On Wed, Nov 21, 2012 at 06:03:06PM +0100, Ingo Molnar wrote:
> > > 
> > > * Mel Gorman <mgorman@...e.de> wrote:
> > > 
> > > > On Wed, Nov 21, 2012 at 10:21:06AM +0000, Mel Gorman wrote:
> > > > > 
> > > > > I am not including a benchmark report in this but will be posting one
> > > > > shortly in the "Latest numa/core release, v16" thread along with the latest
> > > > > schednuma figures I have available.
> > > > > 
> > > > 
> > > > Report is linked here https://lkml.org/lkml/2012/11/21/202
> > > > 
> > > > I ended up cancelling the remaining tests and restarted with
> > > > 
> > > > 1. schednuma + patches posted since so that works out as
> > > 
> > > Mel, I'd like to ask you to refer to our tree as numa/core or 
> > > 'numacore' in the future. Would such a courtesy to use the 
> > > current name of our tree be possible?
> > > 
> > 
> > Sure, no problem.
> 
> Thanks!
> 
> I ran a quick test with your 'balancenuma v4' tree and while 
> numa02 and numa01-THREAD-ALLOC performance is looking good, 
> numa01 performance does not look very good:
> 
>                     mainline    numa/core      balancenuma-v4
>      numa01:           340.3       139.4          276 secs
> 
> 97% slower than numa/core.

I mean numa/core was 97% faster. That transforms into 
balancenuma-v4 being 50.5% slower.

Your numbers from yesterday showed an even bigger proportion:

AUTONUMA BENCH
                                          3.7.0                 3.7.0                 3.7.0                 3.7.0                 
3.7.0                 3.7.0
                                rc6-stats-v4r12   rc6-schednuma-v16r2 rc6-autonuma-v28fastr3	  rc6-moron-v4r38    rc6-twostage-v4r38  rc6-thpmigrate-v4r38
Elapsed NUMA01                1668.03 (  0.00%)      486.04 ( 70.86%) 	   794.10 ( 52.39%)	 601.19 ( 63.96%)     1575.52 (  5.55%)     1066.67 ( 36.05%)

In your test numa/core was 240% times faster than mainline, 63% 
faster than autonuma and 119% faster than 
balancenuma-"rc6-thpmigrate-v4r38".

Thanks,

	Ingo
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