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

Sergey Meirovich
2014-02-06T16:29:34Z

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