How do I select Process ID (PID) in powershell Get-Counter script? - powershell

Question

This script is giving me the CPU for each node process. Which is great. But I need to know the PID for each process so that I can match specific process to CPU usage.
$ProcessName = "node"
$CpuCores = (Get-WMIObject Win32_ComputerSystem).NumberOfLogicalProcessors
$Samples = (Get-Counter "\Process($Processname*)\% Processor Time").CounterSamples
$Samples | Select InstanceName,#{Name="CPU %";Expression={[Decimal]::Round(($_.CookedValue / $CpuCores), 4)}}
I've searched everywhere I can think. I've tried PID, ID, ProcessID, InstanceID and many other variants.
Seems like it should be simple?

Answer 1

You are dot referencing specific properties and that's all you'll get back. Thus, you cannot ask for what is not supplied.
# Using variable squeezing to output results to the screen while assigning results to the variable.
($ProcessName = "dllhost")
($CpuCores = (Get-WMIObject Win32_ComputerSystem).NumberOfLogicalProcessors)
($Samples = (Get-Counter "\Process($Processname*)\% Processor Time").CounterSamples)
($Samples | Select InstanceName,#{Name="CPU %";Expression={[Decimal]::Round(($_.CookedValue / $CpuCores), 4)}})
# Results
<#
dllhost
8
Path InstanceName CookedValue
---- ------------ -----------
\\lab01\process(dllhost#2)\% processor time dllhost 0
\\lab01\process(dllhost#1)\% processor time dllhost 0
\\lab01\process(dllhost)\% processor time dllhost 0
dllhost
dllhost
dllhost
#>
Get-Process -Name 'dllhost'
# Results
<#
Handles NPM(K) PM(K) WS(K) CPU(s) Id SI ProcessName
------- ------ ----- ----- ------ -- -- -----------
120 7 1580 6760 0.11 8612 2 dllhost
200 17 3620 11332 0.09 14176 0 dllhost
229 16 3984 12216 0.36 15940 2 dllhost
#>
Get-Counter -Counter "\Process($Processname*)\% Processor Time"
# Results
<#
Timestamp CounterSamples
--------- --------------
23-Nov-19 17:52:10 \\lab01\process(dllhost#2)\% processor time :
3.11758575755139
\\lab01\process(dllhost#1)\% processor time :
0
\\lab01\process(dllhost)\% processor time :
0
#>
So, you need to combine the above for a single result. There are differ ways to do this of course, For example:
Clear-Host
Get-Process -Name 'WUDFHost' |
ForEach {
[PSCustomObject]#{
'ProcessName' = $PSItem.ProcessName
'ProcessId' = $PSItem.Id
'Path' = $PSItem.Path
'Cookedvalue' = ((Get-Counter -Counter "\Process($($PSItem.Name))\% Processor Time").CounterSamples).CookedValue
}
}
# Results
<#
ProcessName ProcessId Path Cookedvalue
----------- --------- ---- -----------
WUDFHost 1100 C:\Windows\System32\WUDFHost.exe 21.8216373679803
WUDFHost 4020 C:\Windows\System32\WUDFHost.exe 6.23866621508705
WUDFHost 4644 C:\Windows\System32\WUDFHost.exe 9.36077443109706
WUDFHost 10280 C:\Windows\System32\WUDFHost.exe 3.11837874640775
#>