Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261413AbTIKRMP (ORCPT ); Thu, 11 Sep 2003 13:12:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261416AbTIKRMP (ORCPT ); Thu, 11 Sep 2003 13:12:15 -0400 Received: from mail.jlokier.co.uk ([81.29.64.88]:50065 "EHLO mail.jlokier.co.uk") by vger.kernel.org with ESMTP id S261413AbTIKRMM (ORCPT ); Thu, 11 Sep 2003 13:12:12 -0400 Date: Thu, 11 Sep 2003 18:12:05 +0100 From: Jamie Lokier To: Andi Kleen Cc: Matthew Wilcox , linux-kernel@vger.kernel.org Subject: Re: Memory mapped IO vs Port IO Message-ID: <20030911171205.GH29532@mail.jlokier.co.uk> References: <20030911160116.GI21596@parcelfarce.linux.theplanet.co.uk.suse.lists.linux.kernel> <20030911162504.GL21596@parcelfarce.linux.theplanet.co.uk> <20030911183136.01dfeb53.ak@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030911183136.01dfeb53.ak@suse.de> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 406 Lines: 12 Andi Kleen wrote: > Even a memory write is tens to hundres of cycles. Not from the CPU's perspective. It is done in parallel with other instructions. -- Jamie - 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/