From owner-freebsd-amd64@FreeBSD.ORG Tue Mar 14 10:41:03 2006 Return-Path: X-Original-To: freebsd-amd64@freebsd.org Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5DB2716A400 for ; Tue, 14 Mar 2006 10:41:03 +0000 (UTC) (envelope-from joao@matik.com.br) Received: from msrv.matik.com.br (msrv.matik.com.br [200.152.83.14]) by mx1.FreeBSD.org (Postfix) with ESMTP id 884A043D46 for ; Tue, 14 Mar 2006 10:41:02 +0000 (GMT) (envelope-from joao@matik.com.br) Received: from anb (anb.matik.com.br [200.152.83.34]) by msrv.matik.com.br (8.13.4/8.13.1) with ESMTP id k2EAetN9033171; Tue, 14 Mar 2006 07:40:56 -0300 (BRT) (envelope-from joao@matik.com.br) From: JoaoBR To: kono@kth.se Date: Tue, 14 Mar 2006 07:40:37 -0300 User-Agent: KMail/1.9.1 References: <20060313221836.5491916A420@hub.freebsd.org> <200603141106.13693.kono@kth.se> In-Reply-To: <200603141106.13693.kono@kth.se> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200603140740.38388.joao@matik.com.br> X-Filter-Version: 1.11a (msrv.matik.com.br) X-Virus-Scanned: ClamAV version 0.88, clamav-milter version 0.87 on msrv.matik.com.br X-Virus-Status: Clean Cc: freebsd-amd64@freebsd.org Subject: Re: amd64 slower than i386 on identical AMD 64 system? / How is hyperthreading handled on amd64? X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Mar 2006 10:41:03 -0000 On Tuesday 14 March 2006 07:06, Alexander Konovalenko wrote: > > Hi > > Since some time (>6.0R) I have the impression that amd64 runs slower th= an > > i386. Now I run some tests on identical hardware and using ubench > > confirmes this. Somebody has comments on this? > > I have Dual core AMD64 4400+ and FreeBSD RELENG_5. I don't have FreeBSD > i386 installed but you can just compare benchmarks. > > ubench uses all CPU/cores by default, when one ubench is running, top > shows: > so where is your comparism? My point was that the same hardware is faster=20 running i386 I experience this also on X2 machines but do not have two machines to compa= re I have a X2-4400-SMP running amd64 and a X2-4200-SMP running i386 and it gi= ves=20 me the same numbers running ubench Jo=E3o > PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU > COMMAND 11528 XXXX 111 0 3572K 880K RUN 1 0:12 93.64% > 42.29% ubench 11529 XXXX 111 0 3572K 880K CPU0 1 0:11 > 97.21% 41.16% ubench 11526 XXXX -8 0 3572K 880K piperd 0 =20 > 0:17 41.76% 31.98% ubench > > > one ubench executed (with no -s flag =3D use all CPU, default): > > Unix Benchmark Utility v.0.3 > Copyright (C) July, 1999 PhysTech, Inc. > Author: Sergei Viznyuk > http://www.phystech.com/download/ubench.html > FreeBSD 5.5-PRERELEASE FreeBSD 5.5-PRERELEASE #12: Sun Mar 5 17:34:07 CET > 2006 XXXX@XXXX:/usr/obj/usr/src/sys/DAEMON64SMP amd64 > Ubench CPU: 238149 > Ubench MEM: 255459 > -------------------- > Ubench AVG: 246804 > > > two ubench executed with -s flag (use single CPU only): > > Ubench Single CPU: 120184 (0.40s) > Ubench Single MEM: 126787 (0.39s) > ----------------------------------- > Ubench Single AVG: 123485 > > Ubench Single CPU: 121000 (0.41s) > Ubench Single MEM: 128762 (0.40s) > ----------------------------------- > Ubench Single AVG: 124881 > > > one ubench executed with -s flag (use single CPU only): > > Ubench Single CPU: 123251 (0.40s) > Ubench Single MEM: 161494 (0.40s) > ----------------------------------- > Ubench Single AVG: 142372 > > > /Alexander Konovalenko > > +46-8-5537-8142 (office) > +46-7-3752-2116 > http://daemon.nanophys.kth.se/~kono > > Royal Institute of Technology (KTH) > Nanostructure Physics Department, Albanova > Roslagstullsbacken 21 > 10691 Stockholm > Sweden > > > A mensagem foi scaneada pelo sistema de e-mail e pode ser considerada segura. Service fornecido pelo Datacenter Matik https://datacenter.matik.com.br