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问题:

Is it possible to print the current CPU usage for each core in the system?

This is what I have so far using powershell:

Get-WmiObject -Query "select Name, PercentProcessorTime from Win32_PerfFormattedData_PerfOS_Processor"

回答1:

It can be be done using the following powershell command:

(Get-WmiObject -Query "select Name, PercentProcessorTime from Win32_PerfFormattedData_PerfOS_Processor") | foreach-object { write-host "$($_.Name): $($_.PercentProcessorTime)" };

Also you could create a file called get_cpu_usage.ps1 with the contents:

while ($true)
{
    $cores = (Get-WmiObject -Query "select Name, PercentProcessorTime from Win32_PerfFormattedData_PerfOS_Processor")
    $cores | foreach-object { write-host "$($_.Name): $($_.PercentProcessorTime)" }; 
    Start-Sleep -m 200
}

Then run it using:

powershell -executionpolicy bypass "get_cpu_usage.ps1"

回答2:

As an alternative, you can use Get-Counter command.

For example:

Get-Counter -Counter '\Processor(*)\% Processor Time' -Computer $desktop | select -ExpandProperty CounterSamples

~~From my testing it's about 4 times faster (atleast on my machine) than querying WMI.~~

EDIT: After testing some more, repeated uses of the query are faster (got mean of 284 ms) because Get-Counter needs minimum of 1 second to get the samples.

回答3:

In Powershell Core 6 the commands have changed.

(Get-CimInstance -Query "select Name, PercentProcessorTime from Win32_PerfFormattedData_PerfOS_Processor") | foreach-object { write-host "$($_.Name): $($_.PercentProcessorTime)" };

The script would look like this in Powershell Core 6.

while ($true) {
         $cores = (Get-CimInstance -Query "select Name, PercentProcessorTime from Win32_PerfFormattedData_PerfOS_Processor")
         $cores | foreach-object { write-host "$($_.Name): $($_.PercentProcessorTime)" };
         Start-Sleep -m 1000
         [System.Console]::Clear() 
}