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

Sergey Meirovich
2014-02-05T14:52:54Z

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

On 4 February 2014 19:24, Christoph Hellwig <hch@infradead.org> wrote:
> At least XFS can support appending AIO writes easily, and Sergey has
> demonstrated a use case for them.
>
> I've not done any performance testing myself, but ensured that xfstests
> already exercises the code path.