Hi Olga On Wed, 2019-01-09 at 14:39 -0500, Olga Kornievskaia wrote: > Hi Trond, > > Do you have any plans for this patch set? > > I applied the patches on top of 4.20-rc7 kernel I had and tested it > (linux to linux) with iozone on the hardware (40G link with Mellanox > CX-5 card). > > Results seem to show read IO improvement from 1.9GB to 3.9GB. Write > IO > speed seems to be the same (disk bound I'm guessing). I also tried > mounting tmpfs. Same thing. > > Seems like a useful feature to include? Thanks for testing this. Was this your own port of the original patches, or have you taken my branch from http://git.linux-nfs.org/?p=trondmy/linux-nfs.git;a=shortlog;h=refs/heads/multipath_tcp ? Either way I appreciate the data point. I haven't seen too many other reports of performance improvements, and that's the main reason why this patchset has languished. 3.9GB/s would be about 31Gbps, so that is not quite wire speed, but certainly a big improvement on 1.9GB/s. I'm a little surprised, tbough, that the write performance did not improve with the tmpfs. Was all this using aio+dio on the client? -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@xxxxxxxxxxxxxxx
