use prtg to monitor sun server CPU

I have prtg set up to monitor a sun server. I can see the network statistics (I didn't set up this server). I would like to minitor the CPUs as well, using PRTG. What do I need running on the Sun for PRTG to gather the statistics? If I need to have a particular MIB for it, does anyone know where I can get them?

Thank you

According to PRTG's website, you may add a "Tag Filter" for CPU usage. See for yourself how this is being done at their live demo

Thank you.

I have net-snmp installed on the sun server. According to net-snmp, the latest version (5.4), there is an OID called hrProcessorLoad. I installed the version and the OID is there and snmpwalk returns an integer.

When I add the sensor to prtg and test the OID, it also returns an integer value (which it is supposed to). But the vertical graphs shows units for speed, where it should be an interger representing a percentage.

Any idea what I am doing or not doing?

thanks