linux-kernel - Re: SMP performance degradation with sysbench

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Message-Id: <200703131240.47785.dada1@cosmosbay.com>
Date:	Tue, 13 Mar 2007 12:40:47 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Andrea Arcangeli <andrea@...e.de>,
	Anton Blanchard <anton@...ba.org>,
	Rik van Riel <riel@...hat.com>,
	Lorenzo Allegrucci <l_allegrucci@...oo.it>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: SMP performance degradation with sysbench

On Tuesday 13 March 2007 12:12, Nick Piggin wrote:
>
> I guess googlemalloc (tcmalloc?) isn't suitable for a general purpose
> glibc allocator. But I wonder if there are other improvements that glibc
> can do here?

I cooked a patch some time ago to speedup threaded apps and got no feedback.

http://lkml.org/lkml/2006/8/9/26

Maybe we have to wait for 32 core cpu before thinking of cache line 
bouncings...

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