On Tue, Apr 19, 2016 at 1:24 AM, qingwei wei <tchengwee@xxxxxxxxx> wrote: > Hi Vijay, > > I rerun the test with gluster 3.7.11and found that the utilization still > high when i use libgfapi. The write performance is also no good. > > Below are the info and results: > > Hypervisor host: > libvirt 1.2.17-13.el7_2.4 > qemu-kvm 2.1.2-23.el7.1 > > > WIndows VM: > Windows 2008R2 > IOmeter > > Ubuntu VM: > Ubuntu 14.04 > fio 2.1.3 > > > Windows VM (libgfapi) > > 4k random read > > IOPS 22920.76 > Avg. response time (ms) 0.65 > CPU utilization total (%) 82.02 > CPU Privilegde time (%) 77.76 > > 4k random write > > IOPS 4526.39 > Avg. response time (ms) 3.26 > CPU utilization total (%) 93.61 > CPU Privilegde time (%) 90.24 > > Windows VM (fuse) > > 4k random read > > IOPS 14662.86 > Avg. response time (ms) 1.08 > CPU utilization total (%) 27.66 > CPU Privilegde time (%) 24.45 > > 4k random write > > IOPS 16911.66 > Avg. response time (ms) 0.94 > CPU utilization total (%) 26.74 > CPU Privilegde time (%) 22.64 > > Ubuntu VM (libgfapi) > > 4k random read > > IOPS 34364 > Avg. response time (ms) 0.46 > CPU utilization total (%) 6.09 > > 4k random write > > IOPS 4531 > Avg. response time (ms) 3.53 > CPU utilization total (%) 1.2 > > Ubuntu VM (fuse) > > 4k random read > > IOPS 17341 > Avg. response time (ms) 0.92 > CPU utilization total (%) 4.22 > > 4k random write > > IOPS 17611 > Avg. response time (ms) 0.91 > CPU utilization total (%) 4.65 > > Any comments on this or things i should try? > Can you please share your gluster volume configuration? It might be worth checking if the tunables in profile virt (extras/group-virt.example) are applied on this volume. Additionally I would also try to: 1 disable write-behind in gluster to see if there is any peformance difference for writes 2 use perf record -p <qemu> followed by perf annotate to observe the hot threads. HTH, Vijay _______________________________________________ Gluster-devel mailing list Gluster-devel@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-devel
