CPU and TMM utilization

Hi,

 

 

I'm trying to get the CPU (0-4) and TMM utilization figures out of our BigIP using iControl. My monitoring application is coded in perl using SOAP::Lite.

 

 

I'm struggling a little bit to see the best was of getting the utilization figures. For CPU 0-4 im using System::SystemInfo::get_all_cpu_usage_extended_information but Im not totally sure how to turn that into something useful.

 

 

I also don't want to have to call that method, sleep for a while and then call the method again so have also looked at System::Statistics::get_performance_graph_csv_statistics

 

 

Could you offer advice on the best way to achieve this, I've been calling this method to retrieve the stats for the last 5 minutes but I'm unsure on how up to date the data from get_performance_graph_csv_statistics is and also get NaN back quite often in the results. What would I expect to see if for arguments sake, something went screwy internally on the BigIP and the stats were not being updated, would I get a null result?

 

 

Thanks in advance.