From owner-freebsd-current@FreeBSD.ORG Wed Sep 2 12:58:56 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 BCF2D1065670 for ; Wed, 2 Sep 2009 12:58:56 +0000 (UTC) (envelope-from 482254ac@razorfever.net) Received: from ironport2-out.teksavvy.com (ironport2-out.teksavvy.com [206.248.154.182]) by mx1.freebsd.org (Postfix) with ESMTP id 7FDC88FC15 for ; Wed, 2 Sep 2009 12:58:56 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ArUEALcInkpMCrCL/2dsb2JhbACBUxrZBYQbBYFXhhk X-IronPort-AV: E=Sophos;i="4.44,318,1249272000"; d="scan'208";a="44965587" Received: from 76-10-176-139.dsl.teksavvy.com (HELO server.razorfever.net) ([76.10.176.139]) by ironport2-out.teksavvy.com with ESMTP; 02 Sep 2009 08:57:45 -0400 Received: from [192.168.0.197] ([192.168.0.197]) by server.razorfever.net (8.13.8/8.13.8) with ESMTP id n82CwdeW016865; Wed, 2 Sep 2009 08:58:39 -0400 (EDT) (envelope-from 482254ac@razorfever.net) Message-ID: <4A9E6C2A.7090305@razorfever.net> Date: Wed, 02 Sep 2009 08:59:22 -0400 From: "Derek (freebsd lists)" <482254ac@razorfever.net> User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: "James R. Van Artsdalen" References: <4A9E5F34.2090700@razorfever.net> <4A9E6759.7090700@jrv.org> In-Reply-To: <4A9E6759.7090700@jrv.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.95.2 at server.razorfever.net X-Virus-Status: Clean Cc: FreeBSD Current Subject: Re: siis/atacam/ata/gmirror 8.0-BETA3 disk performance 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: Wed, 02 Sep 2009 12:58:56 -0000 James R. Van Artsdalen wrote: > Derek (freebsd lists) wrote: >> I get about 40MB/s read, and 30MB/s write. See attached >> bench-*.txt files. > > That's too slow. As I posted on July 31 I got sustained read rates of > 875 MB/s across ten disks, through two 3124 cards and four port multipliers. > Right, so directly to a single disks I see 40/30MB/s read/write respectively. "Benchmarks" on the Internet peg the i/o to be around 100/80MB/s average read on these disks. > The system I tested was a dual processor Opteron 244 (1.8 GHz) running > amd64. Perhaps more important, my disk controllers were on two > different PCI-X buses with ample bandwidth (100 MHz 64-bit and 133 MHz > 64-bit). From the dmesg, this is a dual 1.4Ghz P3, and the controller is standard 32-bit/33Mhz PCI. Mind you, I think even 80MB/s should not saturate the PCI bus, if there's nothing else going on. > Is your disk controller on a PCI bus, and is there any other PCI traffic > at the time? The only traffic would be a little ssh traffic on fxp0, but otherwise, I can't think of any other traffic that would be occurring. - Derek