How to calculate the throughput in Cooja simulator - contiki

Question

Hi All,
I work with example/ipv6/rpl-udp files in cooja simulator. How do I measure the amount of throughput in the network?
With the command "powertrace_start(CLOCK_SECOND * 60); " in the client.c code, I get the Powertrace output.
Can I use this method?
throughput= packet received / Simulation time
Simulation time = (ENERGEST_TYPE_TRANSMIT + ENERGEST_TYPE_LISTEN) / 32768
Is the method correct?
Thanks in advance,
Nasrin

Answer 1

No, that is not correct as ENERGEST_TYPE_* are constants.
One way to do it is with Cooja simulator scripts.
For example, let's say you have a C program that prints "Message transmitted" every time the node sends a message to another node and "Message received" every time it receives as message.
A Cooja script can automatically run the simulation for a specific time and count the messages. This code works for me:
TIMEOUT(100000); // simulation duration in milliseconds
num_messages_tx = 0;
num_messages_rx = 0;
timeout_function = function () {
log.log("Script timed out.\n");
log.log("Messages transmitted: " + num_messages_tx + " \n");
log.log("Messages received: " + num_messages_rx + " \n");
log.testOK();
}
while (true) {
if (msg) {
if(msg.startsWith("Message transmitted")) {
num_messages_tx += 1;
}
if(msg.startsWith("Message received")) {
num_messages_rx += 1;
}
}
YIELD();
}
To start using it, save the code (its JavaScript) in a file test.js and add this to your .csc Cooja configuration file:
<plugin>
org.contikios.cooja.plugins.ScriptRunner
<plugin_config>
<scriptfile>[CONFIG_DIR]/test.js</scriptfile>
<active>true</active>
</plugin_config>
<width>457</width>
<z>4</z>
<height>427</height>
<location_x>3</location_x>
<location_y>404</location_y>
</plugin>