Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757750AbXHUXld (ORCPT ); Tue, 21 Aug 2007 19:41:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754355AbXHUXl0 (ORCPT ); Tue, 21 Aug 2007 19:41:26 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:33307 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753707AbXHUXlZ (ORCPT ); Tue, 21 Aug 2007 19:41:25 -0400 Date: Tue, 21 Aug 2007 16:41:25 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Mathieu Desnoyers cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, mingo@redhat.com Subject: Re: [PATCH] SLUB use cmpxchg_local In-Reply-To: <20070821233938.GD29691@Krystal> Message-ID: References: <20070820204126.GA22507@Krystal> <20070820212922.GA27011@Krystal> <20070820215413.GA28452@Krystal> <20070821173849.GA8360@Krystal> <20070821231216.GA29691@Krystal> <20070821233938.GD29691@Krystal> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 556 Lines: 13 On Tue, 21 Aug 2007, Mathieu Desnoyers wrote: > Using cmpxchg_local vs cmpxchg has a clear impact on the fast paths, as > shown below: it saves about 60 to 70 cycles for kmalloc and 200 cycles > for the kmalloc/kfree pair (test 2). Hmmmm.. I wonder if the AMD processors simply do the same in either version. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/