From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933084AbXCMLkn (ORCPT ); Tue, 13 Mar 2007 07:40:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933099AbXCMLkn (ORCPT ); Tue, 13 Mar 2007 07:40:43 -0400 Received: from pfx2.jmh.fr ([194.153.89.55]:34085 "EHLO pfx2.jmh.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933084AbXCMLkn (ORCPT ); Tue, 13 Mar 2007 07:40:43 -0400 From: Eric Dumazet To: Nick Piggin Subject: Re: SMP performance degradation with sysbench Date: Tue, 13 Mar 2007 12:40:47 +0100 User-Agent: KMail/1.9.5 Cc: Andrea Arcangeli , Anton Blanchard , Rik van Riel , Lorenzo Allegrucci , linux-kernel@vger.kernel.org, Ingo Molnar , Suparna Bhattacharya , Jens Axboe References: <1172425476.5489.11.camel@odyssey.lan> <20070313105742.GG8992@v2.random> <45F68713.9040608@yahoo.com.au> In-Reply-To: <45F68713.9040608@yahoo.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200703131240.47785.dada1@cosmosbay.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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...