From owner-freebsd-emulation@FreeBSD.ORG Sun May 1 05:39:52 2011 Return-Path: Delivered-To: freebsd-emulation@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B9561106566C for ; Sun, 1 May 2011 05:39:52 +0000 (UTC) (envelope-from decke@bluelife.at) Received: from groupware.itac.at (groupware.itac.at [91.205.172.99]) by mx1.freebsd.org (Postfix) with ESMTP id 560AE8FC0C for ; Sun, 1 May 2011 05:39:52 +0000 (UTC) Received: from [90.152.173.99] (90.152.173.99) by groupware.itac.at (Axigen) with (CAMELLIA256-SHA encrypted) ESMTPSA id 1677BC; Sun, 1 May 2011 07:39:54 +0200 From: Bernhard =?ISO-8859-1?Q?Fr=F6hlich?= To: typo W , freebsd-emulation@freebsd.org X-Mailer: Modest 3.90.7 References: <6157936.1304216907022.JavaMail.root@mswamui-blood.atl.sa.earthlink.net> In-Reply-To: <6157936.1304216907022.JavaMail.root@mswamui-blood.atl.sa.earthlink.net> Content-Type: text/plain; charset=utf-8 Content-ID: <1304228386.8814.4.camel@Nokia-N900-42-11> Date: Sun, 01 May 2011 07:39:47 +0200 Message-Id: <1304228387.8814.5.camel@Nokia-N900-42-11> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-AxigenSpam-Level: 1 X-CTCH-RefID: str=0001.0A0B0201.4DBCF227.007D,ss=1,fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown Cc: Subject: Re: virtualbox I/O 3 times slower than KVM? X-BeenThere: freebsd-emulation@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Bernhard =?ISO-8859-1?Q?Fr=F6hlich?= List-Id: Development of Emulators of other operating systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 01 May 2011 05:39:52 -0000 On So.,  1. Mai. 2011 04:28:26 CEST, typo W wrote: > Hi, I'm brand new to virtualbox, so pardon me in case I made stupid > mistakes.  I created a FreeBSD guest out of the regular virtualbox port > (3.2.12) on FreeBSD 8.2, then timed the copying of a 320MB binary file > to another file, which took 4 seconds, ie, 80MB/s.  On an identical > hardware I created a CentOS guest out of KVM running on CentOS, and the > same operation only takes 1 second.  On both hosts, the copy takes 1 > second.  That is, virtualbox slowed the copying to 1/4 speed on my guest > FreeBSD. > > Both hosts are Dell R710, with 6 x 600GB 15K SAS drives forming a RAID6 > with R700 controller with 512MB cache. > > I'm testing in preparation of production servers, so would prefer > regular ports, ie, 4.0.6 tar ball is out of question for now. Virtualbox 4.0 uses async i/o so that will probably improve performance. Please also use the new ahci kernel module in the guest because that also significantly improves i/o performance. Virtualbox 4.0.6 will be committed to the tree next week.