zperf: Network Traffic Generator¶
zperf is a network traffic generator for Zephyr that may be used to evaluate network bandwidth.
Compatible with iPerf_2.0.5. Note that in newer iPerf versions, an error message like this is printed and the server reported statistics are missing.
LAST PACKET NOT RECEIVED!!!
Client or server mode allowed without need to modify the source code.
zperf is board-agnostic. However, to run the zperf sample application, the target platform must provide a network interface supported by Zephyr.
This sample application has been tested on the following platforms:
Freedom Board (FRDM K64F)
Quark SE C1000 Development Board
iPerf 2.0.5 installed on the host machine
Depending on the network technology chosen, extra steps may be required to setup the network environment.
If Zephyr acts as a client, iPerf must be executed in server mode. For example, the following command line must be used for UDP testing:
$ iperf -s -l 1K -u -V -B 2001:db8::2
For TCP testing, the command line would look like this:
$ iperf -s -l 1K -V -B 2001:db8::2
In the Zephyr console, zperf can be executed as follows:
zperf udp upload 2001:db8::2 5001 10 1K 1M
For TCP the zperf command would look like this:
zperf tcp upload 2001:db8::2 5001 10 1K 1M
If the IP addresses of Zephyr and the host machine are specified in the config file, zperf can be started as follows:
zperf udp upload2 v6 10 1K 1M
or like this if you want to test TCP:
zperf tcp upload2 v6 10 1K 1M
If Zephyr is acting as a server, set the download mode as follows for UDP:
zperf udp download 5001
or like this for TCP:
zperf tcp download 5001
and in the host side, iPerf must be executed with the following command line if you are testing UDP:
$ iperf -l 1K -u -V -c 2001:db8::1 -p 5001
and this if you are testing TCP:
$ iperf -l 1K -V -c 2001:db8::1 -p 5001
iPerf output can be limited by using the -b option if Zephyr is not able to receive all the packets in orderly manner.