Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757495Ab2HHGWL (ORCPT ); Wed, 8 Aug 2012 02:22:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45363 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756916Ab2HHGWJ (ORCPT ); Wed, 8 Aug 2012 02:22:09 -0400 Message-ID: <50220616.6060508@redhat.com> Date: Wed, 08 Aug 2012 14:24:22 +0800 From: Asias He User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 MIME-Version: 1.0 To: Christoph Hellwig CC: linux-kernel@vger.kernel.org, Jens Axboe , kvm@vger.kernel.org, "Michael S. Tsirkin" , Rusty Russell , Shaohua Li , Tejun Heo , virtualization@lists.linux-foundation.org Subject: Re: [PATCH V6 0/2] Improve virtio-blk performance References: <1344329235-17449-1-git-send-email-asias@redhat.com> <20120807091630.GB2651@lst.de> <5021D87C.4050400@redhat.com> In-Reply-To: <5021D87C.4050400@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1151 Lines: 27 On 08/08/2012 11:09 AM, Asias He wrote: > On 08/07/2012 05:16 PM, Christoph Hellwig wrote: >> On Tue, Aug 07, 2012 at 04:47:13PM +0800, Asias He wrote: >>> 1) Ramdisk device >>> With bio-based IO path, sequential read/write, random read/write >>> IOPS boost : 28%, 24%, 21%, 16% >>> Latency improvement: 32%, 17%, 21%, 16% >>> 2) Fusion IO device >>> With bio-based IO path, sequential read/write, random read/write >>> IOPS boost : 11%, 11%, 13%, 10% >>> Latency improvement: 10%, 10%, 12%, 10% >> >> Do you also have numbers for normal SAS/SATA disks? The changelog should >> have a reall good explanation of why this is optional, and numbers are a >> very important part of that. Yes. I posted the numbers on normal SATA disks a few days ago in the thread with Sasha. Will add that data and explanation of why optional to the changelog -- Asias -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/