Re: [PATCH 0/3] support appending AIO writes

Sergey Meirovich
2014-02-07T09:40:58Z

On 7 February 2014 00:51, Dave Chinner <david@fromorbit.com> wrote:
> On Thu, Feb 06, 2014 at 06:29:11PM +0200, Sergey Meirovich wrote:
>> On 5 February 2014 16:52, Sergey Meirovich <rathamahata@gmail.com> wrote:
>> > Hi Christoph,
>> >
>> > Thanks a lot! Applied your patches on top of 3.13.1 and they indeed
>> > make a huge difference.
>> >
>> >
>> > Append AIO
>> >
>> > chunk size w/o patches with patches
>> > ===================================================
>> > 4k 6.8834 Mb/sec 1762.15 IOps 31.542 Mb/sec 8074.75 IOps
>> > 8k 15.321 Mb/sec 1961.12 IOps 62.873 Mb/sec 8047.71 IOps
>> > 16k 28.257 Mb/sec 1808.46 IOps 139.35 Mb/sec 8918.45 IOps
>>
>> And with simple wrapper around io_submit() difference for 4 k is even
>> more impressive than with sysbench:
>>
>> without patches:
>> =====================
>> bandwidth (MiB/s): 11.89
>> IOps: 3044.58
>>
>> with patches:
>> =====================
>> bandwidth (MiB/s): 118.16
>> IOps: 30250.17
>
> Thanks for providing numbers, Sergey. It's clear that we need to
> make this change from them. Can I add a "Tested-by: Sergey Meirovich
> <rathamahata@gmail.com>" to the patches?

Sure, Dave. Please do.