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Hi guys, thanks to this request, I wrote my version of GetLogicalProcessorInformation UDF for x86 e x64: ; #FUNCTION# ======================================================================================================================== ; Name...........: _WinAPI_GetLogicalProcessorInformation ; Description ...: Retrieves information about logical processors and related hardware. ; Syntax.........: _WinAPI_GetLogicalProcessorInformation() ; Return values .: On success it returns a bidimensional array: on rows there is the list of processor sets, these are the columns: ; |[0] - A logical processor affinity mask, which indicates the logical processors that the information applies to. ; |[1] - If setted, then the specified logical processors share a single processor core. ; |[2] - How many active processors that share functional units are in the relationship ; (it is setted only if the previous element is setted too) ; |[3] - If setted, it identifies the NUMA node (it can be 0). ; |[4] - If setted, the specified logical processors share a physical package. ; |[5] - A bidimensional array: on rows there is the cache list, these are the columns: ; |[0] - The cache level ; |[1] - The cache associativity ; |[2] - The cache line size, in bytes ; |[3] - The cache size, in bytes ; |[4] - The cache type ; On failure it returns -1 and sets @error to non zero: ; |-1 - internal error ; |-2 - missing DLL (Ws2_32.dll) ; Remarks .......: Search GetLogicalProcessorInformation in MSDN Library. ; Author ........: j0kky ; Modified ......: 1.0.0 ; Links .........: https://msdn.microsoft.com/it-it/library/windows/desktop/ms683194(v=vs.85).aspx ; ==================================================================================================================================== Func _WinAPI_GetLogicalProcessorInformation() Local $hDll = DllOpen("kernel32.dll") If @error Then Return SetError(-2, 0, -1) Local Const $ERROR_INSUFFICIENT_BUFFER = 122 Local $aRet = DllCall($hDll, "BOOL", "GetLogicalProcessorInformation", "ptr", Null, "dword*", 0) If @error Or Not (DllCall($hDll, "DWORD", "GetLastError")[0] = $ERROR_INSUFFICIENT_BUFFER) Then DllClose($hDll) Return SetError(-1, 0, -1) EndIf Local $nReturnLength = $aRet[2] Local $tBuffer = DllStructCreate("byte[" & $nReturnLength & "]") Local $pBuffer = DllStructGetPtr($tBuffer) $aRet = DllCall($hDll, "BOOL", "GetLogicalProcessorInformation", "ptr", $pBuffer, "dword*", $nReturnLength) If @error Or Not $aRet[0] Then DllClose($hDll) Return SetError(-1, 0, -1) EndIf Local Const $tagSYSTEM_LOGICAL_PROCESSOR_INFORMATION = "ULONG_PTR ProcessorMask; INT_PTR Relationship; BYTE UnionBuffer[16]" Local $tSYSTEM_LOGICAL_PROCESSOR_INFORMATION = DllStructCreate($tagSYSTEM_LOGICAL_PROCESSOR_INFORMATION, $pBuffer) Local $nSize = DllStructGetSize($tSYSTEM_LOGICAL_PROCESSOR_INFORMATION), $tCACHE_DESCRIPTOR, _ $aResult[1][6], _ ;mask, core, logical, numa, package, cache $aCacheModel[0][5], _ ;level, associativity, line size, size, processor cache type $nOffset = 0, $nArraySize, $aCache, $vProcessor, $nProcessorMask $aResult[0][0] = $tSYSTEM_LOGICAL_PROCESSOR_INFORMATION.ProcessorMask $aResult[0][5] = $aCacheModel Do $tSYSTEM_LOGICAL_PROCESSOR_INFORMATION = DllStructCreate($tagSYSTEM_LOGICAL_PROCESSOR_INFORMATION, $pBuffer + $nOffset) $nProcessorMask = $tSYSTEM_LOGICAL_PROCESSOR_INFORMATION.ProcessorMask $nArraySize = UBound($aResult) For $i = 0 To ($nArraySize - 1) If $aResult[$i][0] = $nProcessorMask Then $vProcessor = $i ExitLoop EndIf Next If $vProcessor = Null Then ReDim $aResult[$nArraySize + 1][6] $aResult[$nArraySize][0] = $nProcessorMask $aResult[$nArraySize][5] = $aCacheModel $vProcessor = $nArraySize EndIf Switch $tSYSTEM_LOGICAL_PROCESSOR_INFORMATION.Relationship Case 0 ;RelationProcessorCore $aResult[$vProcessor][1] += 1 If (DllStructCreate("byte Flags", DllStructGetPtr($tSYSTEM_LOGICAL_PROCESSOR_INFORMATION, "UnionBuffer")).Flags) = 1 Then For $i = 1 To (($nSize = 24) ? 32 : 64) $aResult[$vProcessor][2] += (Mod($nProcessorMask, 2) ? 1 : 0) $nProcessorMask = Floor($nProcessorMask / 2) Next EndIf Case 1 ;RelationNumaNode $aResult[$vProcessor][3] = DllStructCreate("dword NodeNumber", DllStructGetPtr($tSYSTEM_LOGICAL_PROCESSOR_INFORMATION, "UnionBuffer")).NodeNumber Case 2 ;RelationCache $tCACHE_DESCRIPTOR = DllStructCreate("byte Level; byte Associativity; word LineSize; dword Size; INT Type", _ DllStructGetPtr($tSYSTEM_LOGICAL_PROCESSOR_INFORMATION, "UnionBuffer")) $aCache = $aResult[$vProcessor][5] $nArraySize = UBound($aCache) ReDim $aCache[$nArraySize + 1][5] $aCache[$nArraySize][0] = $tCACHE_DESCRIPTOR.Level $aCache[$nArraySize][1] = $tCACHE_DESCRIPTOR.Associativity $aCache[$nArraySize][2] = $tCACHE_DESCRIPTOR.LineSize $aCache[$nArraySize][3] = $tCACHE_DESCRIPTOR.Size $aCache[$nArraySize][4] = $tCACHE_DESCRIPTOR.Type $aResult[$vProcessor][5] = $aCache Case 3 ;RelationProcessorPackage $aResult[$vProcessor][4] += 1 EndSwitch $nOffset += $nSize $vProcessor = Null Until $nOffset = $nReturnLength DllClose($hDll) Return $aResult EndFunc ;==>_WinAPI_GetLogicalProcessorInformation Usage example: #include <array.au3> $array = _WinAPI_GetLogicalProcessorInformation() _ArrayDisplay($array, "Processor set list:") For $i = 0 To UBound($array) - 1 _ArrayDisplay($array[$i][5], "Processor set " & $i + 1 & " cache:") Next