From owner-freebsd-performance@FreeBSD.ORG Mon Feb 7 08:36:41 2005 Return-Path: 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 6227616A4CE for ; Mon, 7 Feb 2005 08:36:41 +0000 (GMT) Received: from mx2.mail.ru (mx2.mail.ru [194.67.23.122]) by mx1.FreeBSD.org (Postfix) with ESMTP id DF02943D54 for ; Mon, 7 Feb 2005 08:36:40 +0000 (GMT) (envelope-from samspeed@mail.ru) Received: from [213.129.119.20] (port=2758 helo=192.168.3.7) by mx2.mail.ru with esmtp id 1Cy4Nn-000MPg-00 for freebsd-performance@freebsd.org; Mon, 07 Feb 2005 11:36:36 +0300 Date: Mon, 7 Feb 2005 11:33:40 +0300 From: Andrey Smagin X-Mailer: The Bat! (v1.62r) X-Priority: 3 (Normal) Message-ID: <1189321068.20050207113340@mail.ru> To: freebsd-performance@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Spam: Not detected Subject: My notices about ATA performance X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: samspeed List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Feb 2005 08:36:41 -0000 Hi ALL. I have 2 PC. 1. iP 166 (RAM 48Mb) 2. Duron 1133 (RAM 1Gb) 2 HDD - WD and Seagate (120GB/8Mb cache). Kernels used FreeBSD 4.8 RELEASE FreeBSD 5.1 RELEASE FreeBSD 6.0 CURRENT (1-2 week old) Test speed of copying 1 large (600Mb) file from 1 HDD to another. If put HDD's on PC 1 under 4.8 - 7-10 MBytes/s (UDMA33)(60%CPU Usage) under 5.1 - 2.7-3 MBytes/s (UDMA33)(100%CPU Usage) under 6.0 - 2.7-3 MBytes/s (UDMA33)(100%CPU Usage) If put better CPU K6-2-233 on PC 1 then speed of copying increased under 5.1 - 3.2-4 MBytes/s (UDMA33)(100%CPU Usage) under 6.0 - 3.2-4 MBytes/s (UDMA33)(100%CPU Usage) If put HDD's on PC 2 under 4.8 not tested under 5.1 - 34-41 MBytes/s (UDMA100)(~30%CPU Usage) under 6.0 - 33-41 MBytes/s (UDMA100)(~30%CPU Usage) Why speed of IO operations very depend from CPU power in 5x and 6.x ? -- Best regards, Andrey mailto:samspeed@mail.ru