Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761972AbXHVJj6 (ORCPT ); Wed, 22 Aug 2007 05:39:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750747AbXHVJjt (ORCPT ); Wed, 22 Aug 2007 05:39:49 -0400 Received: from one.firstfloor.org ([213.235.205.2]:52144 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751792AbXHVJjs (ORCPT ); Wed, 22 Aug 2007 05:39:48 -0400 Date: Wed, 22 Aug 2007 11:39:45 +0200 From: Andi Kleen To: Christoph Lameter Cc: Mathieu Desnoyers , Andi Kleen , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, mingo@redhat.com Subject: Re: [PATCH] SLUB use cmpxchg_local Message-ID: <20070822093945.GA7539@one.firstfloor.org> References: <20070821231216.GA29691@Krystal> <20070821233938.GD29691@Krystal> <20070821234702.GE29691@Krystal> <20070822000323.GG29691@Krystal> <20070822003834.GB1400@Krystal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 756 Lines: 17 On Tue, Aug 21, 2007 at 06:06:19PM -0700, Christoph Lameter wrote: > Ok. Measurements vs. simple cmpxchg on a Intel(R) Pentium(R) 4 CPU 3.20GHz Note the P4 is a extreme case in that "unusual" instructions are quite slow (basically anything that falls out of the trace cache). Core2 tends to be much more benign and generally acts more like a K8 in latencies. There are millions and millions of P4s around of course and we shouldn't disregard them, but they're not the future and not highest priority. -Andi - 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/