From owner-freebsd-current@FreeBSD.ORG Mon Oct 18 14:00:55 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 111D216A4CE for ; Mon, 18 Oct 2004 14:00:55 +0000 (GMT) Received: from mailhub.sweetdreamsracing.biz (mailhub.sweetdreamsracing.biz [66.92.171.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id BB2A543D48 for ; Mon, 18 Oct 2004 14:00:54 +0000 (GMT) (envelope-from culverk@sweetdreamsracing.biz) Received: by mailhub.sweetdreamsracing.biz (Postfix, from userid 80) id 43B2361AA; Mon, 18 Oct 2004 10:00:46 -0400 (EDT) Received: from 141.156.69.109 ([141.156.69.109]) by www.sweetdreamsracing.biz (Horde) with HTTP for ; Mon, 18 Oct 2004 10:00:45 -0400 Message-ID: <20041018100045.f8koww0skcco0woo@www.sweetdreamsracing.biz> Date: Mon, 18 Oct 2004 10:00:45 -0400 From: Kenneth Culver To: fandino@ng.fadesa.es References: <20041015190638.C5A0E5D04@ptavv.es.net> <41715E7F.7060509@ng.fadesa.es> In-Reply-To: <41715E7F.7060509@ng.fadesa.es> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Disposition: inline Content-Transfer-Encoding: 7bit User-Agent: Internet Messaging Program (IMP) 4.0-cvs cc: freebsd-current@freebsd.org Subject: Re: FreeBSD 5.3b7and poor ata performance X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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: Mon, 18 Oct 2004 14:00:55 -0000 Quoting fandino : > Hello Kevin, > > Kevin Oberman wrote: >>> Tests were done win bonnie++ 1.93c and the results were Linux two >>> times faster than FreeBSD using the same hardware. >>> >>> GNU/Linux 2.4.18 with ext2: 56848 K/sec >>> FreeBSD 5.3b7 with default fs: 26347 K/sec >>> FreeBSD 5.3b7 ata raid0* (two disks): 26131 K/sec >>> FreeBSD 5.3b7 geom stripe* (two disks): 30063 K/sec >> >> >> Are you comparing apples with apples? I believe that Linux mounts file >> systems as async by default. To compare with FreeBSD, you should use "-o >> async" when you mount. Of course, this is less reliable. >> >> Also, make sure that disk write-cache is enabled on both or disabled on >> both. > > write-cache was enable on all tests and disks were in UDMA5 mode. > > In this new round of tests I add FreeBSD witch async and OpenBSD (always > using the same hardware). FreeBSD is by far, the worst throughput of all > (about 50% slower than others) :-? > > GNU/Linux 2.4.18 with ext2: 56848 K/sec > FreeBSD 5.3b7 with default fs: 26347 K/sec > FreeBSD 5.3b7 with default fs(async): 26566 K/sec > FreeBSD 5.3b7 ata raid0* (two disks): 26131 K/sec > FreeBSD 5.3b7 geom stripe* (two disks): 30063 K/sec > FreeBSD 5.3b7 geom stripe** (four disks): 31891 K/sec > OpenBSD 3.5 UFS fs: 55277 K/sec > > * Each disk of the raid had a throughput of approx. 15000 K/sec > ** Each disk of the raid had a throughput of approx. 7500 K/sec > Each disk of the read split the throughput by half. > > How is possible that FreeBSD performs as bad? > > If you're still using the GENERIC kernel, that could explain it, and judging from other emails I've seen from you, you're still using the GENERIC kernel. Ken