linux-kernel - Re: Major regression on hackbench with SLUB (more numbers)

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Message-ID: <Pine.LNX.4.58.0712211751190.6085@gandalf.stny.rr.com>
Date:	Fri, 21 Dec 2007 17:52:44 -0500 (EST)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Christoph Lameter <clameter@....com>
cc:	Pekka Enberg <penberg@...helsinki.fi>, Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Christoph Hellwig <hch@...radead.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Major regression on hackbench with SLUB (more numbers)


On Fri, 21 Dec 2007, Christoph Lameter wrote:

> Actually thanks for pointing that out Pekka.... Here is a patch that takes
> the regression almost completely away (Too much jetlag combined with flu
> seems to have impaired my thinking I should have seen this earlier). I
> still need to run my slab performance tests on this. But hackbench
> improves.
>
>
> SLUB: Improve hackbench speed
>
> Increase the mininum number of partial slabs to keep around and put
> partial slabs to the end of the partial queue so that they can add
> more objects.
>
> Signed-off-by: Christoph Lameter <clameter@....com>
>

FYI, I'm currently on holiday till Jan 2cd, and I also lost access to the
machine I did the orignal benchmarks on.  But I'll try to reserve it again
after the New Year, and I will run the benchmarks including this patch and
report my findings.

Thanks,

-- Steve

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