| .. _zperf: |
| |
| zperf: Network Traffic Generator |
| ################################ |
| |
| .. contents:: |
| :local: |
| :depth: 2 |
| |
| Overview |
| ******** |
| |
| zperf is a shell utility which allows to generate network traffic in Zephyr. The |
| tool may be used to evaluate network bandwidth. |
| |
| zperf is 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. |
| |
| .. code-block:: console |
| |
| LAST PACKET NOT RECEIVED!!! |
| |
| zperf can be enabled in any application, a dedicated sample is also present |
| in Zephyr. See :ref:`zperf sample application <zperf-sample>` for details. |
| |
| Sample Usage |
| ************ |
| |
| 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: |
| |
| .. code-block:: console |
| |
| $ iperf -s -l 1K -u -V -B 2001:db8::2 |
| |
| For TCP testing, the command line would look like this: |
| |
| .. code-block:: console |
| |
| $ iperf -s -l 1K -V -B 2001:db8::2 |
| |
| |
| In the Zephyr console, zperf can be executed as follows: |
| |
| .. code-block:: console |
| |
| zperf udp upload 2001:db8::2 5001 10 1K 1M |
| |
| |
| For TCP the zperf command would look like this: |
| |
| .. code-block:: console |
| |
| 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: |
| |
| .. code-block:: console |
| |
| zperf udp upload2 v6 10 1K 1M |
| |
| |
| or like this if you want to test TCP: |
| |
| .. code-block:: console |
| |
| zperf tcp upload2 v6 10 1K 1M |
| |
| |
| If Zephyr is acting as a server, set the download mode as follows for UDP: |
| |
| .. code-block:: console |
| |
| zperf udp download 5001 |
| |
| |
| or like this for TCP: |
| |
| .. code-block:: console |
| |
| zperf tcp download 5001 |
| |
| |
| and in the host side, iPerf must be executed with the following |
| command line if you are testing UDP: |
| |
| .. code-block:: console |
| |
| $ iperf -l 1K -u -V -c 2001:db8::1 -p 5001 |
| |
| |
| and this if you are testing TCP: |
| |
| .. code-block:: console |
| |
| $ 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. |
