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@xxxxxxxxxxxxx> 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. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
