On Mon, Sep 21, 2020 at 09:50:19AM +0100, Dr. David Alan Gilbert wrote: > * Vivek Goyal (vgo...@redhat.com) wrote: > > Hi All, > > > > virtiofsd default thread pool size is 64. To me it feels that in most of > > the cases thread pool size 1 performs better than thread pool size 64. > > > > I ran virtiofs-tests. > > > > https://github.com/rhvgoyal/virtiofs-tests > > > > And here are the comparision results. To me it seems that by default > > we should switch to 1 thread (Till we can figure out how to make > > multi thread performance better even when single process is doing > > I/O in client). > > > > I am especially more interested in getting performance better for > > single process in client. If that suffers, then it is pretty bad. > > > > Especially look at randread, randwrite, seqwrite performance. seqread > > seems pretty good anyway. > > > > If I don't run who test suite and just ran randread-psync job, > > my throughput jumps from around 40MB/s to 60MB/s. That's a huge > > jump I would say. > > > > Thoughts? > > What's your host setup; how many cores has the host got and how many did > you give the guest?
Got 2 processors on host with 16 cores in each processor. With hyperthreading enabled, it makes 32 logical cores on each processor and that makes 64 logical cores on host. I have given 32 to guest. Vivek
