From owner-freebsd-current@FreeBSD.ORG Fri Jul 3 00:04:54 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3A3A61065673 for ; Fri, 3 Jul 2009 00:04:54 +0000 (UTC) (envelope-from max@love2party.net) Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.17.8]) by mx1.freebsd.org (Postfix) with ESMTP id C13E28FC13 for ; Fri, 3 Jul 2009 00:04:53 +0000 (UTC) (envelope-from max@love2party.net) Received: from vampire.homelinux.org (dslb-088-066-023-170.pools.arcor-ip.net [88.66.23.170]) by mrelayeu.kundenserver.de (node=mrbap1) with ESMTP (Nemesis) id 0MKt2u-1MMWGq1yRZ-000nnB; Fri, 03 Jul 2009 02:04:52 +0200 Received: (qmail 58090 invoked from network); 3 Jul 2009 00:04:51 -0000 Received: from kvm.laiers.local (HELO kvm.localnet) (192.168.4.200) by mx.laiers.local with SMTP; 3 Jul 2009 00:04:51 -0000 From: Max Laier Organization: FreeBSD To: freebsd-current@freebsd.org Date: Fri, 3 Jul 2009 02:04:50 +0200 User-Agent: KMail/1.11.3 (Linux/2.6.30-rc5-ARCH; KDE/4.2.3; x86_64; ; ) References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200907030204.51415.max@love2party.net> X-Provags-ID: V01U2FsdGVkX1+mjc6h0Tk2S1/niEm7mPXfmsrr6/AORmqRRW+ j9zPFWIrnPl5SpmXPHJSx3+E14C5v72f6vzfAFHkgogvutnRBb v8wNIBYjTb+1owVJ/hYvQ== Cc: Rafal Jaworowski , Jeff Roberson Subject: Re: MD5 test slowdown X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Jul 2009 00:04:54 -0000 On Thursday 02 July 2009 13:32:08 Rafal Jaworowski wrote: > I'm observing some heavy slowdown seen with md5 test on PowerPC: > > 1. On the MPC8572 machine with today's HEAD I'm getting: > > # md5 -t > MD5 time trial. Digesting 100000 10000-byte blocks ... done > Digest = 766a2bb5d24bddae466c572bcabca3ee > Time = 36.930565 seconds > Speed = 27077842.000000 bytes/second > > 2. While a couple of months back it yielded 6x shorter times on this > very same hardware, like this one: > > # md5 -t > MD5 time trial. Digesting 100000 10000-byte blocks ... done > Digest = 766a2bb5d24bddae466c572bcabca3ee > Time = 6.027277 seconds > Speed = 165912400.000000 bytes/second > > Timers work fine, the slowdown is real. I don't know if this is > PowerPC related, and was wondering if anybody observed something > similar on other archs perhaps? Any suggestions what could be causing > this or where to look? I cannot see immediate suspects in the arch/ > platform code. "signifanctly slowdown of FreeBSD 8.0-CURRENT/amd64" to this mailing list reports something that might be related. It seems there is a patch available, but not committed yet. Though I'm not sure about the nature of the problem exactly. Jeff? -- /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News