[dpdk-users] l2fwd performance in VM with SR-IOV
WBAHACER at 126.com
Sat Dec 19 07:23:20 CET 2015
I have measured performace of example/l2fwd in VM with SR-IOV.
My experiment server: CPU: 32 core Intel Xeon E5-4603 v2 @
2.20GHz, NIC: 10G Intel 82599ES， OS：ubuntu14.04.3.
I started a VM with this command：
# qemu-system-x86_64 -enable-kvm -cpu host -m 4G -smp 4 -net
none -device vfio-pci,host=<vf1-pcie-addr> -device
vfio-pci,host=<vf2-pcie-addr> -hda vm.img -vnc :1
I bound vf1 & vf2 to igb_uio, then started a example/l2fwd in VM.
Then i started a pktgen in another server (same hardware & os with
this server) to send packets (small packet - 64bit).
The results is :
1. when i sent packets with pktgen from only 1 port , the
throughput (measured by pktgen rx/tx rates) was 7.0Gbps.
2. when i sent packets from both 2 port, the throughput was
7.2Gbps (3.6Gbps each port).
But, i have measured l2fwd performance in host with SR-IOV (binding
vf1 & vf2 to vfio-pci & starting l2fwd in host).
The result is :
when i sent packets from both 2 port, the throughput was
14.4Gbps (7.2Gbps each port).
I want to ask when i ran l2fwd in VM, Can i achieve similar
performance with host? or, there are some methods to tune the performance ?
Thanks a lot!
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