From owner-freebsd-performance@FreeBSD.ORG Wed Feb 27 11:54:14 2008 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 603411065671 for ; Wed, 27 Feb 2008 11:54:14 +0000 (UTC) (envelope-from stefan.lambrev@moneybookers.com) Received: from blah.sun-fish.com (blah.sun-fish.com [217.18.249.150]) by mx1.freebsd.org (Postfix) with ESMTP id 28D108FC1A for ; Wed, 27 Feb 2008 11:54:14 +0000 (UTC) (envelope-from stefan.lambrev@moneybookers.com) Received: by blah.sun-fish.com (Postfix, from userid 1002) id 1F04C1B10EF2; Wed, 27 Feb 2008 12:54:13 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on blah.cmotd.com X-Spam-Level: X-Spam-Status: No, score=-10.6 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.2.3 Received: from hater.haters.org (hater.cmotd.com [192.168.3.125]) by blah.sun-fish.com (Postfix) with ESMTP id 0195E1B10EE8; Wed, 27 Feb 2008 12:54:06 +0100 (CET) Message-ID: <47C54F5E.4040903@moneybookers.com> Date: Wed, 27 Feb 2008 13:54:06 +0200 From: Stefan Lambrev User-Agent: Thunderbird 2.0.0.9 (X11/20080212) MIME-Version: 1.0 To: Philip Murray References: In-Reply-To: Content-Type: text/plain; charset=windows-1251; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-performance@freebsd.org Subject: Re: Slow iSCSI performance X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Feb 2008 11:54:14 -0000 Greeting, Philip Murray wrote: > Hi, > > I'm trying to use the new iSCSI initiator (thanks!) with 7, but I'm > getting dismal performance. A simple dd will will max out at about > 2MB/sec, and untarring the likes of the ports tree is a painful task. I have similar experience. In my case I was using for initiator Linux host and FreeBSD with iscsi-target from ports. I didn't have enough time to dig where the problem is. > > The target is another FreeBSD 7 machine running the NetBSD target > daemon from ports exporting a ZVOL from ZFS (also tried with a file on > UFS). > > > It'll start off relatively fast and then suddenly dies after a few > seconds, and then eventually will start again: > > tty da0 da1 pass0 > cpu > tin tout KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy > in id > 0 78 63.90 494 30.80 0.00 0 0.00 0.00 0 0.00 0 0 5 > 2 93 > 0 77 63.89 575 35.90 0.00 0 0.00 0.00 0 0.00 0 0 8 > 3 89 > 0 77 63.86 581 36.26 0.00 0 0.00 0.00 0 0.00 0 0 5 > 4 91 > 0 77 63.64 268 16.64 0.00 0 0.00 0.00 0 0.00 0 0 3 > 2 95 > 0 77 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0 0 0 > 0 100 > 0 77 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0 0 0 > 0 100 > > > The two hosts are connected with GbE, and iperf can saturate it > without trouble (~987Mb/sec in both directions). > > Any ideas where to start looking for the culprit? > > Cheers > > Phil > > > > > > > > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to > "freebsd-performance-unsubscribe@freebsd.org" -- Best Wishes, Stefan Lambrev ICQ# 24134177