zperf: Network Traffic Generator¶
zperf is a network traffic generator for Zephyr that may be used to evaluate network bandwidth.
- Compatible with iPerf_2.0.9. Note that UDP uploader (client) testing did not work properly in iPerf_2.0.13: 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
- QEMU x86
- iPerf 2.0.5 installed on the host machine
- Supported board
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.