From owner-freebsd-current@FreeBSD.ORG Tue Oct 19 17:05:49 2004 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 9CF7E16A4CE for ; Tue, 19 Oct 2004 17:05:49 +0000 (GMT) Received: from lariat.org (lariat.org [63.229.157.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id A52AD43D39 for ; Tue, 19 Oct 2004 17:05:48 +0000 (GMT) (envelope-from brett@lariat.org) Received: from runaround.lariat.org (IDENT:ppp1000.lariat.org@lariat.org [63.229.157.2]) by lariat.org (8.9.3/8.9.3) with ESMTP id LAA06774 for ; Tue, 19 Oct 2004 11:05:45 -0600 (MDT) X-message-flag: Warning! Use of Microsoft Outlook renders your system susceptible to Internet worms. Message-Id: <6.1.1.1.2.20041019110051.05b50690@localhost> X-Sender: brett@localhost (Unverified) X-Mailer: QUALCOMM Windows Eudora Version 6.1.1.1 Date: Tue, 19 Oct 2004 11:05:41 -0600 To: current@freebsd.org From: Brett Glass Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Mailman-Approved-At: Wed, 20 Oct 2004 12:12:51 +0000 Subject: Slow disk performance on FreeBSD 5.3 beta 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: Tue, 19 Oct 2004 17:05:49 -0000 I'm benchmarking the latest beta of FreeBSD 5.3 against 4.10, and am finding that disk performance is siginificantly slower. (I've scanned the list archives and have seen that others have reported similar problems.) Yes, I've turned off every debugging option I can find, so it's not that. I have to build a high performance system for disk-intensive tasks this week, and so will use either 4.10 or Dragonfly (a fork of 4.x-STABLE) for it. Has anyone identified the bottleneck? Is it in the ATA drivers themselves, or in another subsystem like geom or UFS2? --Brett Glass