linux-kernel - Re: [PATCH 00/27] Latest numa/core release, v16

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Message-ID: <alpine.DEB.2.00.1211200007360.16449@chino.kir.corp.google.com>
Date:	Tue, 20 Nov 2012 00:11:06 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Ingo Molnar <mingo@...nel.org>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Turner <pjt@...gle.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH 00/27] Latest numa/core release, v16

On Tue, 20 Nov 2012, Ingo Molnar wrote:

> > I confirm that numa/core regresses significantly more without 
> > thp than the 6.3% regression I reported with thp in terms of 
> > throughput on the same system.  numa/core at 01aa90068b12 
> > ("sched: Use the best-buddy 'ideal cpu' in balancing 
> > decisions") had 99389.49 SPECjbb2005 bops whereas ec05a2311c35 
> > ("Merge branch 'sched/urgent' into sched/core") had 122246.90 
> > SPECjbb2005 bops, a 23.0% regression.
> 
> What is the base performance figure with THP disabled? Your 
> baseline was:
> 
>    sched/core at ec05a2311c35:    136918.34 SPECjbb2005 
> 
> Would be interesting to see how that kernel reacts to THP off.
> 

In summary, the benchmarks that I've collected thus far are:

THP enabled:

   numa/core at ec05a2311c35:	136918.34 SPECjbb2005 bops
   numa/core at 01aa90068b12:	128315.19 SPECjbb2005 bops (-6.3%)

THP disabled:

   numa/core at ec05a2311c35:	122246.90 SPECjbb2005 bops
   numa/core at 01aa90068b12:	 99389.49 SPECjbb2005 bops (-23.0%)
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