linux-kernel - Re: [PATCH V6 0/2] Improve virtio-blk performance

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Date:	Wed, 08 Aug 2012 14:24:22 +0800
From:	Asias He <asias@...hat.com>
To:	Christoph Hellwig <hch@....de>
CC:	linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
	kvm@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Shaohua Li <shli@...nel.org>, Tejun Heo <tj@...nel.org>,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH V6 0/2] Improve virtio-blk performance

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
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