Tsung: CPU usage value from munin too high-Collection of common programming errors

I am struggling to get munin reporting working when running a Tsung load test. My set up is as follows.

Web site staging server (staging4):

Tsung server

My Tsung server has an SSH tunnel to staging4 on port 4950 see my tsung.xml configuration below:

When I start my load test I get the following error message every 10 seconds:

   =INFO REPORT==== 16-Nov-2011::16:04:09 ===
        ts_os_mon_munin:(4:) CPU usage value from munin too high, skip (host "ip-10-48-177-212.housetrip.com" , cpu  8761644.1)

I maybe wrong but I think this is because our staging 4 server has 2 CPUs and so the resulting CPU % is greater than 100%. I checked through the Tsung code and their didn’t seem to be an option to set the number of CPUs referenced in the monitoring XML element https://github.com/processone/tsung/blob/master/src/tsung_controller/ts_config.erl

However there does seem to be a CPU setting on the munin plugin wrapper https://github.com/processone/tsung/blob/master/src/tsung_controller/ts_os_mon_munin.erl

Has anyone come across this before? Is there anyway I can get the munin values to be returned in my log file?

Any suggestions would be greatly appreciated.

Many thanks

1. I haven’t worked with munin, but I know that Tsung doesn’t handle multicore CPUs very well.

   To avoid Tsung crashes when running massive Tsung load from a client I used this workaround on a 4 core CPU.

   As you can see, the trick is to set up one client Tsung erlang node per available core. Maybe this trick can solve your munin problem also.