Fresh results: 192.168.0.1 - host (runs netperf) 192.168.0.2 - guest (runs netserver)
host$ src/netperf -H 192.168.0.2 -- -m 200 ioeventfd=on TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.2 (192.168.0.2) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 200 10.00 1759.25 ioeventfd=off TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.2 (192.168.0.2) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 200 10.00 1757.15 The results vary approx +/- 3% between runs. Invocation: $ x86_64-softmmu/qemu-system-x86_64 -m 4096 -enable-kvm -netdev type=tap,id=net0,ifname=tap0,script=no,downscript=no -device virtio-net-pci,netdev=net0,ioeventfd=on|off -vnc :0 -drive if=virtio,cache=none,file=$HOME/rhel6-autobench-raw.img I am running qemu.git with v5 patches, based off 36888c6335422f07bbc50bf3443a39f24b90c7c6. Host: 1 Quad-Core AMD Opteron(tm) Processor 2350 @ 2 GHz 8 GB RAM RHEL 6 host Next I will try the patches on latest qemu-kvm.git Stefan
