linux-kernel - Re: [Q] Default SLAB allocator

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Message-ID: <m2391ktxjj.fsf@firstfloor.org>
Date:	Thu, 11 Oct 2012 16:10:40 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Ezequiel Garcia <elezegarcia@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org, Tim Bird <tim.bird@...sony.com>,
	celinux-dev@...ts.celinuxforum.org
Subject: Re: [Q] Default SLAB allocator

David Rientjes <rientjes@...gle.com> writes:

> On Thu, 11 Oct 2012, Andi Kleen wrote:
>
>> > While I've always thought SLUB was the default and recommended allocator,
>> > I'm surprise to find that it's not always the case:
>> 
>> iirc the main performance reasons for slab over slub have mostly
>> disappeared, so in theory slab could be finally deprecated now.
>> 
>
> SLUB is a non-starter for us and incurs a >10% performance degradation in 
> netperf TCP_RR.

When did you last test? Our regressions had disappeared a few kernels
ago.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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