Date: Sun, 01 May 2011 07:39:47 +0200 From: Bernhard =?ISO-8859-1?Q?Fr=F6hlich?= <decke@bluelife.at> To: typo W <aqqa11@earthlink.net>, freebsd-emulation@freebsd.org Subject: Re: virtualbox I/O 3 times slower than KVM? Message-ID: <1304228387.8814.5.camel@Nokia-N900-42-11> In-Reply-To: <6157936.1304216907022.JavaMail.root@mswamui-blood.atl.sa.earthlink.net> References: <6157936.1304216907022.JavaMail.root@mswamui-blood.atl.sa.earthlink.net>
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On So., 1. Mai. 2011 04:28:26 CEST, typo W <aqqa11@earthlink.net> 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.
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