Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 24 Oct 2002 13:42:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 24 Oct 2002 13:42:42 -0400 Received: from mailhub.fokus.gmd.de ([193.174.154.14]:17899 "EHLO mailhub.fokus.gmd.de") by vger.kernel.org with ESMTP id ; Thu, 24 Oct 2002 13:42:41 -0400 From: Matthias Welk Organization: FhG-FOKUS To: Manfred Spraul , linux-kernel@vger.kernel.org Subject: Re: [CFT] faster athlon/duron memory copy implementation Date: Thu, 24 Oct 2002 19:48:38 +0200 User-Agent: KMail/1.4.7 Cc: arjanv@redhat.com References: <3DB82ABF.8030706@colorfullife.com> In-Reply-To: <3DB82ABF.8030706@colorfullife.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200210241948.38490.matthias.welk@fokus.fraunhofer.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2915 Lines: 65 On Thursday 24 October 2002 19:15, Manfred Spraul wrote: > AMD recommends to perform memory copies with backward read operations > instead of prefetch. > > http://208.15.46.63/events/gdc2002.htm > > Attached is a test app that compares several memory copy implementations. > Could you run it and report the results to me, together with cpu, > chipset and memory type? > > Please run 2 or 3 times. > > -- > Manfred Running on an Athlon XP2000+, ASUS A7V333, 768MB DDR2100: Athlon test program $Id: fast.c,v 1.6 2000/09/23 09:05:45 arjan Exp $ copy_page() tests copy_page function 'warm up run' took 18132 cycles per page copy_page function '2.4 non MMX' took 25200 cycles per page copy_page function '2.4 MMX fallback' took 19369 cycles per page copy_page function '2.4 MMX version' took 18078 cycles per page copy_page function 'faster_copy' took 11343 cycles per page copy_page function 'even_faster' took 11203 cycles per page copy_page function 'no_prefetch' took 7814 cycles per page 1019 [maw] (buruk) /tmp/athlon # athlon_test Athlon test program $Id: fast.c,v 1.6 2000/09/23 09:05:45 arjan Exp $ copy_page() tests copy_page function 'warm up run' took 18081 cycles per page copy_page function '2.4 non MMX' took 19487 cycles per page copy_page function '2.4 MMX fallback' took 19403 cycles per page copy_page function '2.4 MMX version' took 18086 cycles per page copy_page function 'faster_copy' took 11372 cycles per page copy_page function 'even_faster' took 11183 cycles per page copy_page function 'no_prefetch' took 7815 cycles per page 1020 [maw] (buruk) /tmp/athlon # athlon_test Athlon test program $Id: fast.c,v 1.6 2000/09/23 09:05:45 arjan Exp $ copy_page() tests copy_page function 'warm up run' took 18081 cycles per page copy_page function '2.4 non MMX' took 19487 cycles per page copy_page function '2.4 MMX fallback' took 19453 cycles per page copy_page function '2.4 MMX version' took 18063 cycles per page copy_page function 'faster_copy' took 11335 cycles per page copy_page function 'even_faster' took 11154 cycles per page copy_page function 'no_prefetch' took 8332 cycles per page Greeting, Matthias. -- --------------------------------------------------------------- From: Matthias Welk office: +49-30-3463-7272 FhG-FOKUS mobile: +49-179- 1144752 Kaiserin-Augusta-Allee 31 fax : +49-30-3463-8672 10589 Berlin email : matthias.welk@fokus.fraunhofer.de --------------------------------------------------------------- - 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/