Use Job to measure Processors

(in Powershell)

Checking CPU Percentage with Get-Counter (and a Job)

Checking the processor time or processor percentage, using counters or wmi...

$JobObject = Start-Job -Name "MyJob" -ScriptBlock {
		Get-Counter -Counter "\Processor(_Total)\% Processor Time" -SampleInterval 1 -Continuous
}

Start-Sleep -Seconds 5 # give it time to load
$Result = Receive-Job -Job $JobObject

$Result.Readings | 
	Foreach-Object { ($_ -split ':')[-1].Trim() } |
	Measure-Object -Average | 
	Select-Object @{n='Average';e={"{0:f2}" -f $_.Average}}

From Retrieve average CPU-workload with Get-Counter (by Duke Donnovan and AdminOfThings)

Checking CPU Percentage with WMI...

Get-WmiObject -computer $env:computername -class win32_processor | 
	Measure-Object -property LoadPercentage -Average | 
	Select-Object -ExpandProperty Average