Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758157AbXLLACm (ORCPT ); Tue, 11 Dec 2007 19:02:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753854AbXLLACd (ORCPT ); Tue, 11 Dec 2007 19:02:33 -0500 Received: from ug-out-1314.google.com ([66.249.92.172]:35523 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753943AbXLLACc (ORCPT ); Tue, 11 Dec 2007 19:02:32 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding:from; b=wgXADjRtpwrHSapr9YYtweOyVk3JLdv7ULTrec4bM6xFmMvbc9lNdy2MyU0DYgY9QUawA6OXTa6iodocCawPAIKB5EH5AGhplMBC7NcxYatgF6+TvqweCT5jiy908I1KszKsfinlCjutZANgLPumcPPcIleBtvz51CUA/yeoPhQ= Message-ID: <475F24C1.2050807@keyaccess.nl> Date: Wed, 12 Dec 2007 01:01:05 +0100 User-Agent: Thunderbird 2.0.0.9 (X11/20071031) MIME-Version: 1.0 To: nigel@nigel.suspend2.net CC: Linux Kernel , dpreed@reed.com, Alan Cox , pavel@ucw.cz, andi@firstfloor.org, rol@as2917.net, Krzysztof Halasa , david@davidnewall.com, hpa@zytor.com, john@stoffel.org, linux-os@analogic.com Subject: Re: [RFT] Port 0x80 I/O speed References: <475F1DC6.5090403@keyaccess.nl> <475F2358.6060006@nigel.suspend2.net> In-Reply-To: <475F2358.6060006@nigel.suspend2.net> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit From: Rene Herman Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 775 Lines: 23 On 12-12-07 00:55, Nigel Cunningham wrote: > (AMD 1.8GHz Turion, running at 800MHz. ATI RS480 - Mitac 8350 mobo) > > nigel@home:~/Downloads$ gcc port80.c -o port80 > nigel@home:~/Downloads$ sudo ./port80 > cycles: out 1235, in 1207 Looking good. > nigel@home:~/Downloads$ gcc -O2 port80.c -o port80 > nigel@home:~/Downloads$ sudo ./port80 > cycles: out 1844674407370794, in 1844674407369408 Obviously not. I suppose this changes with -m32 on the GCC command line? (sorry for missing that, I have no 64-bit machines). Rene. -- 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/