On 5 February 2014 16:52, Sergey Meirovich <rathamahata@xxxxxxxxx> 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 _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
