From mboxrd@z Thu Jan 1 00:00:00 1970 From: Badari Pulavarty Subject: Re: [RFC] vhost-blk implementation Date: Mon, 22 Mar 2010 19:50:03 -0700 Message-ID: <4BA82C5B.8010808@us.ibm.com> References: <1269306023.7931.72.camel@badari-desktop> <4BA81685.9060809@codemonkey.ws> <4BA81D2F.1020405@us.ibm.com> <4BA820AE.7090803@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Anthony Liguori Return-path: Received: from e5.ny.us.ibm.com ([32.97.182.145]:51512 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753074Ab0CWCtx (ORCPT ); Mon, 22 Mar 2010 22:49:53 -0400 Received: from d01relay06.pok.ibm.com (d01relay06.pok.ibm.com [9.56.227.116]) by e5.ny.us.ibm.com (8.14.3/8.13.1) with ESMTP id o2N2ZRjG016733 for ; Mon, 22 Mar 2010 22:35:27 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay06.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o2N2nqLu1736898 for ; Mon, 22 Mar 2010 22:49:52 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id o2N2nq1w024236 for ; Mon, 22 Mar 2010 22:49:52 -0400 In-Reply-To: <4BA820AE.7090803@codemonkey.ws> Sender: kvm-owner@vger.kernel.org List-ID: Anthony Liguori wrote: > On 03/22/2010 08:45 PM, Badari Pulavarty wrote: >> Anthony Liguori wrote: >>> On 03/22/2010 08:00 PM, Badari Pulavarty wrote: >>>> Forgot to CC: KVM list earlier >>> >>> >>> These virtio results are still with a 2.6.18 kernel with no aio, right? >> Results are on 2.6.33-rc8-net-next kernel. But not using AIO. > > Can you try with aio and cache=none? aio-native,cache=none # time dd if=/dev/vda of=/dev/null bs=128k iflag=direct 640000+0 records in 640000+0 records out 83886080000 bytes (84 GB) copied, 470.588 seconds, 170 MB/s Thanks, Badari