linux-kernel - Re: 2.6.24-rc2: Network commit causes SLUB performance regression with tbench

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Message-ID: <Pine.LNX.4.64.0711121144001.26936@schroedinger.engr.sgi.com>
Date:	Mon, 12 Nov 2007 11:44:31 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
cc:	linux-netdev@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.24-rc2: Network commit causes SLUB performance regression
 with tbench

On Sat, 10 Nov 2007, Nick Piggin wrote:

> BTW. your size-2048 kmalloc cache is order-1 in the default setup,
> wheras kmalloc(1024) or kmalloc(4096) will be order-0 allocations. And
> SLAB also uses order-0 for size-2048. It would be nice if SLUB did the
> same...

You can try to see the effect that order 0 would have by booting with

slub_max_order=0
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