Le but est de pouvoir récupérer les mèmes informations que sur le Gestionnaire de Tâches

wql sur root/CIMV2

Select * from Win32_Processor

instance of Win32_Processor

 show
{
	AddressWidth = 64;
	Architecture = 9;
	AssetTag = “To Be Filled By O.E.M.”;
	Availability = 3;
	Caption = “Intel64 Family 6 Model 158 Stepping 9”;
	Characteristics = 252;
	CpuStatus = 1;
	CreationClassName = “Win32_Processor”;
	CurrentClockSpeed = 3600;
	CurrentVoltage = 10;
	DataWidth = 64;
	Description = “Intel64 Family 6 Model 158 Stepping 9”;
	DeviceID = “CPU0”;
	ExtClock = 100;
	Family = 198;
	L2CacheSize = 1024;
	L3CacheSize = 8192;
	L3CacheSpeed = 0;
	Level = 6;
	LoadPercentage = 2;
	Manufacturer = “GenuineIntel”;
	MaxClockSpeed = 3600;
	Name = “Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz”;
	NumberOfCores = 4;
	NumberOfEnabledCore = 4;
	NumberOfLogicalProcessors = 8;
	PartNumber = “To Be Filled By O.E.M.”;
	PowerManagementSupported = FALSE;
	ProcessorId = “BFEBFBFF000906E9”;
	ProcessorType = 3;
	Role = “CPU”;
	SecondLevelAddressTranslationExtensions = FALSE;
	SerialNumber = “To Be Filled By O.E.M.”;
	SocketDesignation = “U3E1”;
	Status = “OK”;
	StatusInfo = 3;
	SystemCreationClassName = “Win32_ComputerSystem”;
	SystemName = “PC-THIERRY”;
	ThreadCount = 8;
	UpgradeMethod = 1;
	Version = “”;
	VirtualizationFirmwareEnabled = FALSE;
	VMMonitorModeExtensions = FALSE;
};

Avec la requette WMI ci dessous, on récupére CurrentClockSpeed et LoadPercentage.

LoadPercentage retourne l'utilisation du processeur a l'instant T.

CurrentClockSpeed la vitesse du CPU, mais n'a pas l'air de fluctuer comme on pourrait s'y attendre quand on regarde les performances dans le Gestionnaire de Tâches.

wql sur root/CIMV2

Select CurrentClockSpeed,CurrentVoltage,LoadPercentage from Win32_Processor

instance of Win32_Processor
{
	CurrentClockSpeed = 3600;
	CurrentVoltage = 10;
	DeviceID = “CPU0”;
	LoadPercentage = 6;
};

instance of Win32_PerfFormattedData_Counters_ProcessorInformation

 show
{
	AverageIdleTime = “3256073”;
	C1TransitionsPersec = “0”;
	C2TransitionsPersec = “2398”;
	C3TransitionsPersec = “0”;
	ClockInterruptsPersec = 693;
	DPCRate = 5;
	DPCsQueuedPersec = 517;
	IdleBreakEventsPersec = “2414”;
	InterruptsPersec = 2948;
	Name = “_Total”;
	ParkingStatus = 0;
	PercentC1Time = “0”;
	PercentC2Time = “96”;
	PercentC3Time = “0”;
	PercentDPCTime = “0”;
	PercentIdleTime = “100”;
	PercentInterruptTime = “0”;
	PercentofMaximumFrequency = 93;
	PercentPerformanceLimit = 100;
	PercentPriorityTime = “0”;
	PercentPrivilegedTime = “1”;
	PercentPrivilegedUtility = “1”;
	PercentProcessorPerformance = “66”;
	PercentProcessorTime = “0”;
	PercentProcessorUtility = “2”;
	PercentUserTime = “0”;
	PerformanceLimitFlags = 0;
	ProcessorFrequency = 3600;
	ProcessorStateFlags = 0;
};

On peut peut être en déduire la charge du CPU en fonction de PercentIdleTime qui est le pourcentage de temps libre,
donc la charge du CPU devrait être (100-PercentIdleTime)

On peut peut être en déduire la vitesse du CPU grâce a PercentofMaximumFrequency.
Qui est censé être le pourcentage de la vitesse max.
Sachant que la vitesse du CPU est fournie par ProcessorFrequency.

Mais ce ne sont que des suppositions qui mont l'air assez bancales.
En effet le CPU peut dépasser la vitesse fournie par ProcessorFrequency.

Donc indice de fiabilité faible sur les données récupérées par Win32_PerfFormattedData_Counters_ProcessorInformation

wql sur Root/CIMV2

Select * from Win32_PerfFormattedData_PerfOS_Processor  WHERE Name="_Total"

Résultat → instance of Win32_PerfFormattedData_PerfOS_Processor

 show
{
	C1TransitionsPersec = “2974”;
	C2TransitionsPersec = “971”;
	C3TransitionsPersec = “0”;
	DPCRate = 2;
	DPCsQueuedPersec = 403;
	InterruptsPersec = 5750;
	Name = “_Total”;
	PercentC1Time = “13”;
	PercentC2Time = “30”;
	PercentC3Time = “0”;
	PercentDPCTime = “0”;
	PercentIdleTime = “44”;
	PercentInterruptTime = “0”;
	PercentPrivilegedTime = “32”;
	PercentProcessorTime = “52”;
	PercentUserTime = “20”;
};

• Win32_PerfRawData_Counters_ProcessorInformation
• Win32_PerfFormattedData_Counters_ProcessorInformation
• Win32_PerfRawData_GPUPerformanceCounters_GPUProcessMemory
• Win32_PerfFormattedData_PerfOS_Processor
• Win32_PerfRawData_PerfOS_Processor
• root\WMI\ProcessorBiosTStates
• root\WMI\ProcessorPerformance
• root\WMI\ProcessorBiosInfo
• root\CIMV2\Win32_AssociatedProcessorMemory

Source : https://learn.microsoft.com/fr-fr/windows/win32/perfctrs/using-the-pdh-functions-to-consume-counter-data

• https://stackoverflow.com/questions/33571061/get-the-percentage-of-total-cpu-usage
• http://delphiaccess.com/foros/index.php/topic/13894-saber-consumo-cpu-de-proceso-y-total/