Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268054AbUIUUOh (ORCPT ); Tue, 21 Sep 2004 16:14:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268052AbUIUUOh (ORCPT ); Tue, 21 Sep 2004 16:14:37 -0400 Received: from cantor.suse.de ([195.135.220.2]:6301 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id S268048AbUIUUOf (ORCPT ); Tue, 21 Sep 2004 16:14:35 -0400 Date: Tue, 21 Sep 2004 22:14:25 +0200 From: Andi Kleen To: Denis Vlasenko Cc: Andi Kleen , Christoph Lameter , akpm@osdl.org, "David S. Miller" , benh@kernel.crashing.org, wli@holomorphy.com, davem@redhat.com, raybry@sgi.com, ak@muc.de, manfred@colorfullife.com, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, vrajesh@umich.edu, hugh@veritas.com Subject: Re: page fault scalability patch V8: [4/7] universally available cmpxchg on i386 Message-ID: <20040921201425.GH18938@wotan.suse.de> References: <200409211841.25507.vda@port.imtp.ilyichevsk.odessa.ua> <20040921154542.GB12132@wotan.suse.de> <200409212306.38800.vda@port.imtp.ilyichevsk.odessa.ua> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200409212306.38800.vda@port.imtp.ilyichevsk.odessa.ua> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 476 Lines: 12 > Looks like indirect jump is only slightly slower (on this CPU). K7/K8 can predict indirect jumps. But most P3 and P4s can't (except for the new Prescotts and Centrinos). And in all cases their jump predictor works worse. -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/