Date: Fri, 16 Nov 2012 18:49:18 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, Paul Turner <pjt@google.com>,
        Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
        Christoph Lameter <cl@linux.com>, Rik van Riel <riel@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: Benchmark results: "Enhanced NUMA scheduling with adaptive
 affinity"
Message-ID: <20121116174918.GA4723@gmail.com>
References: <20121112160451.189715188@chello.nl>
 <20121112184833.GA17503@gmail.com>
 <20121115100805.GS8218@suse.de>
 <20121116155626.GA4271@gmail.com>
 <20121116162556.GD8218@suse.de>
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* Mel Gorman <mgorman@suse.de> wrote:

> On Fri, Nov 16, 2012 at 04:56:26PM +0100, Ingo Molnar wrote:
> > 
> > * Mel Gorman <mgorman@suse.de> wrote:
> > 
> > > It is important to know how this was configured. I was running 
> > > one JVM per node and the JVMs were sized that they should fit 
> > > in the node. [...]
> > 
> > That is not what I tested: as I described it in the mail I 
> > tested 32 warehouses: i.e. spanning the whole system.
> > 
> 
> Good (sortof) [...]

Not just 'sortof' good but it appears it's unconditionally good: 
meanwhile other testers have reproduced the single-JVM speedup 
with the latest numa/core code as well, so the speedup is not 
just on my system.

Please post your kernel .config so I can check why the 4x JVM 
test does not perform so well on your system. Maybe there's 
something special to your system.

Thanks,

	Ingo
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