From owner-freebsd-performance@FreeBSD.ORG Fri Feb 13 20:01:23 2009 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 451BB106566B for ; Fri, 13 Feb 2009 20:01:23 +0000 (UTC) (envelope-from ivoras@gmail.com) Received: from fg-out-2122.google.com (fg-out-2122.google.com [72.14.220.26]) by mx1.freebsd.org (Postfix) with ESMTP id D069D8FC17 for ; Fri, 13 Feb 2009 20:01:22 +0000 (UTC) (envelope-from ivoras@gmail.com) Received: by fg-out-2122.google.com with SMTP id 23so76051fge.35 for ; Fri, 13 Feb 2009 12:01:21 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <666B517C-6E30-465D-8BAD-B6266C4D3743@tcbug.org> Received: by 10.86.100.19 with SMTP id x19mr56395fgb.3.1234555281758; Fri, 13 Feb 2009 12:01:21 -0800 (PST) Message-ID: <000e0cd28750065bb80462d24d55@google.com> Date: Fri, 13 Feb 2009 20:01:21 +0000 From: ivoras@gmail.com To: Josh Paetzel , Ivan Voras , Antony Mawer , freebsd-performance@freebsd.org X-Mailman-Approved-At: Fri, 13 Feb 2009 20:42:03 +0000 Content-Type: text/plain; charset=ISO-8859-1; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Re: Re: FreeBSD 7.1 disk performance issue on ESXi 3.5 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: Fri, 13 Feb 2009 20:01:23 -0000 On Feb 13, 2009 8:27pm, Josh Paetzel wrote: > In my limited experience with VMWare linux seems to have near bare metal disk performance. FreeBSD seems to incur a significant performance penalty. For instance on my laptop, running OSX and VMWare Fusion, FreeBSd virtual machines can't saturate 100TX off the disk, raw dd manages about 7 Megs/sec, which is in line with what I get shovelling big files around. Disk is a 7200 RPM SATA2. > You might want to try the patch Scott Long made recently (http://svn.freebsd.org/changeset/base/188570) - I found it doubles the performance in some cases for VMWare (writing mostly, though sequential reading can be similarly improved by the combination of this patch and increasing vfs.read_max), but it's still worse than with Linux (100 MB/s vs 150 MB/s). As for the original thread topic: I've communicated with the OP and it appears his method of benchmarking had an error so the problems that appear in his post are bogus.