From owner-freebsd-hackers Wed Sep 9 04:04:25 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id EAA23891 for freebsd-hackers-outgoing; Wed, 9 Sep 1998 04:04:25 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from gilgamesch.bik-gmbh.de (gilgamesch.bik-gmbh.de [194.233.237.91]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id EAA23886 for ; Wed, 9 Sep 1998 04:04:21 -0700 (PDT) (envelope-from cracauer@gilgamesch.bik-gmbh.de) Received: (from cracauer@localhost) by gilgamesch.bik-gmbh.de (8.8.8/8.7.3) id NAA20661; Wed, 9 Sep 1998 13:05:42 +0200 (MET DST) Message-ID: <19980909130542.A20353@cons.org> Date: Wed, 9 Sep 1998 13:05:42 +0200 From: Martin Cracauer To: "Justin T. Gibbs" , hackers@FreeBSD.ORG Subject: Re: Slow rewrite speed in Bonnie References: <199809051721.LAA15549@pluto.plutotech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.93.1i In-Reply-To: <199809051721.LAA15549@pluto.plutotech.com>; from Justin T. Gibbs on Sat, Sep 05, 1998 at 11:15:24AM -0600 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In <199809051721.LAA15549@pluto.plutotech.com>, Justin T. Gibbs wrote: > Can anyone explain this? > > # bonnie -s 1024 > Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done... > -------Sequential Output-------- ---Sequential Input-- --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU > 1024 18766 96.6 55157 89.3 8921 18.2 16883 97.4 62554 70.7 337.9 5.3 Maybe the system doesn't do readahead when it recognizes that the first/every read is immedeatly followed by a lseek? Is this a maschine with > 1024 MB RAM? Nice box, in any case :-) Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer http://www.cons.org/cracauer BSD User Group Hamburg, Germany http://www.bsdhh.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message