On Fri, 29 Jun 2018 23:33:58 -0700 xiangxia.m.yue@xxxxxxxxx wrote: > From: Tonghao Zhang <xiangxia.m.yue@xxxxxxxxx> > > This patch improves the guest receive and transmit performance. > On the handle_tx side, we poll the sock receive queue at the > same time. handle_rx do that in the same way. > > We set the poll-us=100us and use the iperf3 to test Where/how do you configure poll-us=100us ? Are you talking about /proc/sys/net/core/busy_poll ? p.s. Nice performance boost! :-) > its bandwidth, use the netperf to test throughput and mean > latency. When running the tests, the vhost-net kthread of > that VM, is alway 100% CPU. The commands are shown as below. > > iperf3 -s -D > iperf3 -c IP -i 1 -P 1 -t 20 -M 1400 > > or > netserver > netperf -H IP -t TCP_RR -l 20 -- -O "THROUGHPUT,MEAN_LATENCY" > > host -> guest: > iperf3: > * With the patch: 27.0 Gbits/sec > * Without the patch: 14.4 Gbits/sec > > netperf (TCP_RR): > * With the patch: 48039.56 trans/s, 20.64us mean latency > * Without the patch: 46027.07 trans/s, 21.58us mean latency > > This patch also improves the guest transmit performance. > > guest -> host: > iperf3: > * With the patch: 27.2 Gbits/sec > * Without the patch: 24.4 Gbits/sec > > netperf (TCP_RR): > * With the patch: 47963.25 trans/s, 20.71us mean latency > * Without the patch: 45796.70 trans/s, 21.68us mean latency > > Signed-off-by: Tonghao Zhang <zhangtonghao@xxxxxxxxxxxxxxx> -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
