From owner-freebsd-performance@FreeBSD.ORG Thu Jan 26 20:13:08 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8A35316A420 for ; Thu, 26 Jan 2006 20:13:08 +0000 (GMT) (envelope-from Rich@WhiteOakLabs.com) Received: from whiteoaklabs.com (mail.whiteoaklabs.com [69.55.226.191]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2FB1443D45 for ; Thu, 26 Jan 2006 20:13:06 +0000 (GMT) (envelope-from Rich@WhiteOakLabs.com) Received: from xa.home.org (cpe-67-10-34-126.houston.res.rr.com [67.10.34.126]) by whiteoaklabs.com (8.12.11/8.12.11) with ESMTP id k0QKD3oj024481 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 26 Jan 2006 12:13:05 -0800 Received: from [127.0.0.1] (a.home.org [172.16.1.6]) by xa.home.org (8.13.4/8.13.4) with ESMTP id k0QKD2ip032987 for ; Thu, 26 Jan 2006 14:13:03 -0600 (CST) (envelope-from Rich@WhiteOakLabs.com) Message-ID: <43D92D49.4060908@WhiteOakLabs.com> Date: Thu, 26 Jan 2006 14:12:57 -0600 From: Rich Murphey User-Agent: Thunderbird 1.5 (Windows/20051201) MIME-Version: 1.0 To: freebsd-performance@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: mysql performance tuning @ FreeBSD6 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: Thu, 26 Jan 2006 20:13:08 -0000 I'm curious whether Robert's patch might have an effect on samba3 performance as well. This isn't very methodical, but I see about 60% increase samba3 read bandwidth (from 14MB/s to 26Mb/s) when changing from the default kern.timecounter.hardware=i8254 to TSC, which makes me wonder whether it might. Below are details.. Rich Murphey ------------------------------- Server: Samba3 on a dual xeon running FreeBSD 6.0 release. Client: nbench on windows XP SP2. Client and server are using intel pro 1000MT gigabit cards. Here's the nbench output w/comments: w/sysctl kern.timecounter.hardware=TSC: Disk Performance, MBytes/sec File size: 100.0 MBytes thread: 0 write: 7.93 read: 22.94 followed by kern.timecounter.hardware=i8254: Disk Performance, MBytes/sec File size: 100.0 MBytes thread: 0 write: 6.80 read: 14.01 and back to kern.timecounter.hardware=TSC: Disk Performance, MBytes/sec File size: 100.0 MBytes thread: 0 write: 7.77 read: 23.61