Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 24 Oct 2002 15:13:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 24 Oct 2002 15:13:59 -0400 Received: from quark.didntduck.org ([216.43.55.190]:15629 "EHLO quark.didntduck.org") by vger.kernel.org with ESMTP id ; Thu, 24 Oct 2002 15:13:57 -0400 Message-ID: <3DB847DC.4090601@didntduck.org> Date: Thu, 24 Oct 2002 15:19:56 -0400 From: Brian Gerst User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.1) Gecko/20020826 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Manfred Spraul CC: linux-kernel@vger.kernel.org, arjanv@redhat.com Subject: Re: [CFT] faster athlon/duron memory copy implementation References: <3DB82ABF.8030706@colorfullife.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2429 Lines: 60 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. > Athlon XP 1600+ (1400 MHz) 512 MB PC-133 memory Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 03) processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 6 model name : AMD Athlon(tm) Processor stepping : 2 cpu MHz : 1410.668 cache size : 256 KB copy_page() tests copy_page function 'warm up run' took 21428 cycles per page copy_page function '2.4 non MMX' took 22404 cycles per page copy_page function '2.4 MMX fallback' took 22426 cycles per page copy_page function '2.4 MMX version' took 21472 cycles per page copy_page function 'faster_copy' took 13618 cycles per page copy_page function 'even_faster' took 13284 cycles per page copy_page function 'no_prefetch' took 11943 cycles per page copy_page() tests copy_page function 'warm up run' took 21640 cycles per page copy_page function '2.4 non MMX' took 22865 cycles per page copy_page function '2.4 MMX fallback' took 22843 cycles per page copy_page function '2.4 MMX version' took 21597 cycles per page copy_page function 'faster_copy' took 13751 cycles per page copy_page function 'even_faster' took 13407 cycles per page copy_page function 'no_prefetch' took 11952 cycles per page copy_page() tests copy_page function 'warm up run' took 21681 cycles per page copy_page function '2.4 non MMX' took 22900 cycles per page copy_page function '2.4 MMX fallback' took 22999 cycles per page copy_page function '2.4 MMX version' took 21679 cycles per page copy_page function 'faster_copy' took 13782 cycles per page copy_page function 'even_faster' took 13481 cycles per page copy_page function 'no_prefetch' took 11969 cycles per page - 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/