From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: kvm-83 write performance raw Date: Mon, 09 Mar 2009 17:09:21 +0200 Message-ID: <49B53121.2030404@redhat.com> References: <49AC42F4.3030101@codemonkey.ws> <49AC4E05.4030805@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Anthony Liguori , Mailing Lists To: AelMalinka@gmail.com Return-path: Received: from mx2.redhat.com ([66.187.237.31]:59454 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751581AbZCIPJb (ORCPT ); Mon, 9 Mar 2009 11:09:31 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: Malinka Rellikwodahs wrote: > Running the kvm-84 install on the qcow image as kvm -m 1024 -drive > file=qcow,boot=on,cache=writethrough, I get similar performance to the > raw performance. > > So it looks like with cache set to writethrough there's a big > performance hit on this setup, any ideas where to look for that? > > Unrelated, but you'll probably improve raw performance somewhat by using cache=none. -- error compiling committee.c: too many arguments to function