Monitoring Total Processor / CPU utilization on Windows with UIM

Products

• DX Unified Infrastructure Management (Nimsoft / UIM)

Issue/Introduction

This KB answers few questions about monitoring Processor / CPU utilization on Windows with UIM

•  How does the CDM probe calculate CPU Usage / Processor utilization on Windows?
•  Why Total CPU from the CDM probe does not correspond to the total CPU Shown in the Windows Task Manager?  
•  What probe can we use to monitor different windows CPU counters apart from CDM? How can we monitor the total CPU shown in the Windows Task Manager?

Environment

DX UIM 20.4.x or later

Any version of CDM

Resolution

•  How does the CDM probe calculate CPU Usage / Processor utilization on Windows?


The CDM probe "CPU Usage (Total)" QOS is enabled in the advanced tab in the CDM probe:



The QOS values gathered by the probe will come from the Windows Performance Monitor Counter:

Processor > Processor time, _Total


•  Why Total CPU from the CDM probe does not correspond to the total CPU Shown in the Windows Task Manager?  




While the CDM probe Total CPU will correspond to the counter "Processor > Processor time, _Total" the Total CPU shown in Windows Task Manager Corresponds to a different counter: Processor Information, % Processor Utility, _Total



•  What probe can we use to monitor different windows CPU counters apart from CDM? How can we monitor the total CPU shown in the Windows Task Manager?  


The ntperf probe allows to monitor specific windows performance monitor counters:

Eg. Processor Information, % Processor Utility, _Total