linux-kernel - Re: numa/core regressions fixed

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Date:	Wed, 21 Nov 2012 10:38:00 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	David Rientjes <rientjes@...gle.com>
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: numa/core regressions fixed - more testers wanted


* David Rientjes <rientjes@...gle.com> wrote:

> I started profiling on a new machine that is an exact 
> duplicate of the 16-way, 4 node, 32GB machine I was profiling 
> with earlier to rule out any machine-specific problems.  I 
> pulled master and ran new comparisons with THP enabled at 
> c418de93e398 ("Merge branch 'x86/mm'"):
> 
>   CONFIG_NUMA_BALANCING disabled	136521.55 SPECjbb2005 bops
>   CONFIG_NUMA_BALANCING enabled		132476.07 SPECjbb2005 bops (-3.0%)
> 
> Aside: neither 4739578c3ab3 ("x86/mm: Don't flush the TLB on 
> #WP pmd fixups") nor 01e9c2441eee ("x86/vsyscall: Add Kconfig 
> option to use native vsyscalls and switch to it") 
> significantly improved upon the throughput on this system.

Could you please send an updated profile done with latest -tip? 
The last profile I got from you still had the vsyscall emulation 
page faults in it.

Thanks,

	Ingo
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