From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gordan Bobic Subject: virtio disk slower than IDE? Date: Sat, 14 Nov 2009 14:23:21 +0000 Message-ID: <4AFEBD59.2090002@bobich.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from 78-86-195-86.zone2.bethere.co.uk ([78.86.195.86]:44677 "EHLO sentinel1.shatteredsilicon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753150AbZKNOc3 (ORCPT ); Sat, 14 Nov 2009 09:32:29 -0500 Received: from ariia.shatteredsilicon.net (ariia.shatteredsilicon.net [10.2.3.1]) by sentinel1.shatteredsilicon.net (Postfix) with ESMTP id 64866158AC1 for ; Sat, 14 Nov 2009 14:23:21 +0000 (GMT) Sender: kvm-owner@vger.kernel.org List-ID: I just tried paravirtualized virtio block devices, and my tests show that they are approximately 30% slower than emulated IDE devices. I'm guessing this isn't normal. Is this a known issue or am I likely to have mosconfigured something? I'm using 64-bit RHEL/CentOS 5 (both host and guest). Thanks. Gordan