On Fri, 2010-09-03 at 13:52 +0300, Michael S. Tsirkin wrote: > > When binding vhost thread to cpu3, qemu I/O thread to cpu2, macvtap > zero > > copy patch can get 9.4Gb/s. > > > > TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to > 192.168.10.74 (192.168.10.74) port 0 AF_INET : cpu bind > > Recv Send Send Utilization > Service Demand > > Socket Socket Message Elapsed Send Recv Send > Recv > > Size Size Size Time Throughput local remote local > remote > > bytes bytes bytes secs. 10^6bits/s % S % S us/KB > us/KB > > > > 87380 16384 65536 60.00 9408.19 55.69 8.45 0.970 > 0.589 > > > > Shirley > > OTOH CPU utilization is up too. w/i macvtap zero copy patch, the BW can reach link w/i more cpu usage, w/o macvtap zero copy patch, the BW can't be up to link speed. To achieve same BW, CPU utilization is lower when using zero copy. Shirley -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
