获取与Powershell计数器一起使用的CPU的百分比

Question

I am trying to get with powershell script, the percentage of cpu used by my server. I developp a solution by searching on the net, but I am still a debutant and not sure about the real meaning of the value I get with this solution. I did some research on the net, but answers are still giving me more doubt.

This is my script :

function GetPercentageOfCpuUsed()
{
 $value = Get-Counter "\Processor(_Total)\% Processor Time"
 $Value = $value.CounterSamples[0].CookedValue  
 return $Value
}

Is the "value" returned corresponds to the percentage of cpu used by my server at the time when I run my powershell script ?

Answer 1

\\Processor(_Total)\\% Processor Time is a performance counter that tells you the percentage of time the processors were busy during the sampling interval (Source: http://technet.microsoft.com/en-us/library/cc938593.aspx ). For instance, in a 4-core system, one CPU with 100% usage and the rest of the CPUs running entirely idle should give you 25%. You can also monitor this counter live using the Performance Monitor MMC of Windows to get an impression how it behaves. According to the Technet article above, this figure is also the same as the CPU Usage figure in the Task Manager.