Dynamic processor speed function

[erik501]

Good morning I would need a function to detect it dynamic speed of the processor, all the tests I did give me the maximum fixed speed read in the bios and not the speed to which the processor is turning. Any indication to direct me in the right direction? Thank you

[Andreik]

What is dynamic speed of the processor? Are you talking about CPU throttling?

[mistersquirrle]

I believe that they're looking for is the current CPU speed/frequency, which you can see in Task Manager, for example:

I tried several methods, and the best I could get to return was the base speed of 3800 MHz, I could not get it to return the ~4200 MHz that my CPU was actually running at. I tried WMI and registry ways successfully with values. I also tried through pdh.dll (performance counters) and powrprof.dll (CallNtPowerInformation) however I wasn't able to get data back from either.

From what I saw, I don't think that it's really possible from AutoIt at least to get this information.

WMI:

#include <Array.au3>
#include <MsgBoxConstants.au3>
#include <StringConstants.au3>

Local $objWMIService = ObjGet("winmgmts:{impersonationLevel = impersonate}!\\.\root\cimv2")
If Not IsObj($objWMIService) Then
    ConsoleWrite("Failed to retrieve WMI service object." & @CRLF)
    Exit
EndIf

Local $colItems = $objWMIService.ExecQuery("SELECT * FROM Win32_Processor", "WQL", 0x30)
If Not IsObj($colItems) Then
    ConsoleWrite("Failed to query WMI for processor information." & @CRLF)
    Exit
EndIf

For $objItem In $colItems
    ConsoleWrite("Current CPU Frequency: " & $objItem.CurrentClockSpeed & " MHz" & @CRLF)
    ConsoleWrite("CPU MaxClockSpeed: " & $objItem.MaxClockSpeed & " MHz" & @CRLF)
Next

Registry:

#include <WinAPIReg.au3>

Local $cpuFrequency = RegRead("HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0", "~MHz")
If @error Then
    ConsoleWrite("Failed to read CPU frequency from the registry." & @CRLF)
    Exit
EndIf

ConsoleWrite("Current CPU Frequency: " & $cpuFrequency & " MHz" & @CRLF)

 

[Andreik]

As far as I know you can't directly get that info, it's a calculated value. Maybe some approximation value might be obtained using rdtsc but for an accurate value you need a driver with privileges to read MSRs.

[erik501]

Thanks, as I thought, from the tests I've done I can only get the maximum speed of the cpu

[erik501]

 

I made the insertion of the throttling of the CPU and the temperature for my purpose using Coretemp Shared Memory if someone is interested in the entire script.