The iperf-vsock repository
contains few patches to add the support of VSOCK address family to iperf3.
In this way iperf3 can be used to measure the performance between guest and
host using VSOCK sockets.
The VSOCK address family facilitates communication between virtual machines and the host they are running on.
To test VSOCK sockets (only Linux), you must use the new option --vsock on
both server and client.
Other iperf3 options (e.g. -t, -l, -P, -R, --bidir) are well supported by
VSOCK tests.
Prerequisites
- Linux host kernel >= 4.8
- Linux guest kernel >= 4.8
- QEMU >= 2.8
Build iperf3-vsock from source
Clone repository
git clone https://github.com/stefano-garzarella/iperf-vsock
cd iperf-vsock
Building
mkdir build
cd build
../configure
make
(Note: If configure fails, try running ./bootstrap.sh first)
Example with Fedora 30 (host and guest):
Host: start the VM
GUEST_CID=3
sudo modprobe vhost_vsock
sudo qemu-system-x86_64 -m 1G -smp 2 -cpu host -M accel=kvm \
-drive if=virtio,file=/path/to/fedora.img,format=qcow2 \
-device vhost-vsock-pci,guest-cid=${GUEST_CID}
Guest: start iperf server
# SELinux can block you, so you can write a policy or temporally disable it
sudo setenforce 0
iperf-vsock/build/src/iperf3 --vsock -s
Host: start iperf client
iperf-vsock/build/src/iperf3 --vsock -c ${GUEST_CID}
Output
Connecting to host 3, port 5201
[ 5] local 2 port 4008596529 connected to 3 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 1.30 GBytes 11.2 Gbits/sec
[ 5] 1.00-2.00 sec 1.67 GBytes 14.3 Gbits/sec
[ 5] 2.00-3.00 sec 1.57 GBytes 13.5 Gbits/sec
[ 5] 3.00-4.00 sec 1.49 GBytes 12.8 Gbits/sec
[ 5] 4.00-5.00 sec 971 MBytes 8.15 Gbits/sec
[ 5] 5.00-6.00 sec 1.01 GBytes 8.71 Gbits/sec
[ 5] 6.00-7.00 sec 1.44 GBytes 12.3 Gbits/sec
[ 5] 7.00-8.00 sec 1.62 GBytes 13.9 Gbits/sec
[ 5] 8.00-9.00 sec 1.61 GBytes 13.8 Gbits/sec
[ 5] 9.00-10.00 sec 1.63 GBytes 14.0 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 14.3 GBytes 12.3 Gbits/sec sender
[ 5] 0.00-10.00 sec 14.3 GBytes 12.3 Gbits/sec receiver
iperf Done.