From mboxrd@z Thu Jan 1 00:00:00 1970 From: Asias He Subject: Re: [PATCH V6 0/2] Improve virtio-blk performance Date: Wed, 08 Aug 2012 14:24:22 +0800 Message-ID: <50220616.6060508@redhat.com> References: <1344329235-17449-1-git-send-email-asias@redhat.com> <20120807091630.GB2651@lst.de> <5021D87C.4050400@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5021D87C.4050400@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Christoph Hellwig Cc: Jens Axboe , kvm@vger.kernel.org, "Michael S. Tsirkin" , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Tejun Heo , Shaohua Li List-Id: virtualization@lists.linuxfoundation.org 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