From owner-freebsd-current@FreeBSD.ORG Wed Mar 30 09:30:35 2005 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 0DA1016A4CE for ; Wed, 30 Mar 2005 09:30:35 +0000 (GMT) Received: from mi.veco.ru (mail.veco.ru [195.161.146.48]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9AB4E43D45 for ; Wed, 30 Mar 2005 09:30:33 +0000 (GMT) (envelope-from aka@veco.ru) Received: from [172.19.73.1] (HELO camel.veco.ru) by mi.veco.ru (CommuniGate Pro SMTP 4.2.7) with SMTP id 57630 for freebsd-current@FreeBSD.org; Wed, 30 Mar 2005 13:30:31 +0400 Date: Wed, 30 Mar 2005 13:30:31 +0400 From: Andrey Koklin To: freebsd-current@FreeBSD.org Message-Id: <20050330133031.56c27ce3.aka@veco.ru> X-Mailer: Sylpheed version 1.0.0rc (GTK+ 1.2.10; i386-portbld-freebsd6.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: ciss(4): speed degradation for Compaq Smart Array 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: Wed, 30 Mar 2005 09:30:35 -0000 We have several Proliants DL380 with integrated Smart Array 5i controller, with installed FreeBSD OS versions 4.11-stable, 5.4-pre and 6.0-current. All systems have disks configured as RAID5. I've noticed there is drastic difference in speed for the systems. While I have linear transfer 45-50 Mb/s (write) and 100 Mb/s (read) for FreeBSD 4.11, there is near two times degradation in speed with 5.4 and 6.0. -- 8< ------------------------------------------------------------------ FreeBSD 4.11: ciss.c,v 1.2.2.21 2005/01/21 # dd if=/dev/zero of=/var/tmp/4G bs=1024 count=$[4*1024*1024] 4294967296 bytes transferred in 107.075789 secs (40111470 bytes/sec) # dd if=/var/tmp/4G of=/dev/zero 4294967296 bytes transferred in 42.394322 secs (101309966 bytes/sec) FreeBSD 5.4-pre: ciss.c,v 1.56.2.1 2005/01/20 # dd if=/dev/zero of=/var/tmp/4G bs=1024 count=$[4*1024*1024] 4294967296 bytes transferred in 163.088095 secs (26335259 bytes/sec) # dd if=/var/tmp/4G of=/dev/zero 4294967296 bytes transferred in 79.773797 secs (53839324 bytes/sec) FreeBSD 6.0: ciss.c,v 1.60 2005/03/29 # dd if=/dev/zero of=/var/tmp/4G bs=1024 count=$[4*1024*1024] 4294967296 bytes transferred in 224.804547 secs (19105340 bytes/sec) # dd if=/var/tmp/4G of=/dev/zero 4294967296 bytes transferred in 94.839699 secs (45286598 bytes/sec) -- 8< ------------------------------------------------------------------ These are simple tests taken on running systems (tests in single user mode are slightly different but of the same order) It seems, there is sensible speed penalty with driver version growing. Andrey