// get number of processors in the system status = NtQuerySystemInformation(SystemBasicInformation,&SysBaseInfo,sizeof(SysBaseInfo),NULL); if (status != NO_ERROR) return false;
return true; } int KCpuUsage::GetCpuUsage() { // get new system time status = NtQuerySystemInformation(SystemTimeInformation,&SysTimeInfo,sizeof(SysTimeInfo),0); if (status!=NO_ERROR) return -1;
// get new CPU's idle time status = NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL); if (status != NO_ERROR) return -1;
// if it's a first call - skip it if (liOldIdleTime.QuadPart != 0) { // CurrentValue = NewValue - OldValue dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime); dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime);
// CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5; } // store new CPU's idle and system time liOldIdleTime = SysPerfInfo.liIdleTime; liOldSystemTime = SysTimeInfo.liKeSystemTime; return ( (int) dbIdleTime);
}
from msdn: // cpusagent.cpp (Windows NT/2000) // // Getting the CPU usage in percent on Windows NT/2000 // // (c)2000 Ashot Oganesyan K, SmartLine, Inc // mailto:[email protected], http://www.protect-me.com, http://www.codepile.com#include <windows.h> #include <conio.h> #include <stdio.h>#define SystemBasicInformation 0 #define SystemPerformanceInformation 2 #define SystemTimeInformation 3#define Li2Double(x) ((double)((x).HighPart) * 4.294967296E9 + (double)((x).LowPart)) typedef struct { DWORD dwUnknown1; ULONG uKeMaximumIncrement; ULONG uPageSize; ULONG uMmNumberOfPhysicalPages; ULONG uMmLowestPhysicalPage; ULONG uMmHighestPhysicalPage; ULONG uAllocationGranularity; PVOID pLowestUserAddress; PVOID pMmHighestUserAddress; ULONG uKeActiveProcessors; BYTE bKeNumberProcessors; BYTE bUnknown2; WORD wUnknown3; } SYSTEM_BASIC_INFORMATION; typedef struct { LARGE_INTEGER liIdleTime; DWORD dwSpare[76]; } SYSTEM_PERFORMANCE_INFORMATION; typedef struct { LARGE_INTEGER liKeBootTime; LARGE_INTEGER liKeSystemTime; LARGE_INTEGER liExpTimeZoneBias; ULONG uCurrentTimeZoneId; DWORD dwReserved; } SYSTEM_TIME_INFORMATION; // ntdll!NtQuerySystemInformation (NT specific!) // // The function copies the system information of the // specified type into a buffer // // NTSYSAPI // NTSTATUS // NTAPI // NtQuerySystemInformation( // IN UINT SystemInformationClass, // information type // OUT PVOID SystemInformation, // pointer to buffer // IN ULONG SystemInformationLength, // buffer size in bytes // OUT PULONG ReturnLength OPTIONAL // pointer to a 32-bit // // variable that receives // // the number of bytes // // written to the buffer // ); typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);PROCNTQSI NtQuerySystemInformation; void main(void) { SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo; SYSTEM_TIME_INFORMATION SysTimeInfo; SYSTEM_BASIC_INFORMATION SysBaseInfo; double dbIdleTime; double dbSystemTime; LONG status; LARGE_INTEGER liOldIdleTime = {0,0}; LARGE_INTEGER liOldSystemTime = {0,0}; NtQuerySystemInformation = (PROCNTQSI)GetProcAddress(GetModuleHandle("ntdll"),"NtQuerySystemInformation"); if (!NtQuerySystemInformation) return;// get number of processors in the system status = NtQuerySystemInformation(SystemBasicInformation,&SysBaseInfo,sizeof(SysBaseInfo),NULL); if (status != NO_ERROR) return; printf("\nCPU Usage (press any key to exit): "); while(!_kbhit()) { // get new system time status = NtQuerySystemInformation(SystemTimeInformation,&SysTimeInfo,sizeof(SysTimeInfo),0); if (status!=NO_ERROR) return; // get new CPU's idle time status =NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL); if (status != NO_ERROR) return; // if it's a first call - skip it if (liOldIdleTime.QuadPart != 0) { // CurrentValue = NewValue - OldValue dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime); dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime); // CurrentCpuIdle = IdleTime / SystemTime dbIdleTime = dbIdleTime / dbSystemTime; // CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5; printf("\b\b\b\b%3d%%",(UINT)dbIdleTime); }// store new CPU's idle and system time liOldIdleTime = SysPerfInfo.liIdleTime; liOldSystemTime = SysTimeInfo.liKeSystemTime; // wait one second Sleep(1000); } printf("\n"); }
// cpusagent.cpp (Windows NT/2000) // // Getting the CPU usage in percent on Windows NT/2000 // // (c)2000 Ashot Oganesyan K, SmartLine, Inc // mailto:[email protected], http://www.protect-me.com, http://www.codepile.com#include <windows.h> #include <conio.h> #include <stdio.h>#define SystemBasicInformation 0 #define SystemPerformanceInformation 2 #define SystemTimeInformation 3#define Li2Double(x) ((double)((x).HighPart) * 4.294967296E9 + (double)((x).LowPart))typedef struct { DWORD dwUnknown1; ULONG uKeMaximumIncrement; ULONG uPageSize; ULONG uMmNumberOfPhysicalPages; ULONG uMmLowestPhysicalPage; ULONG uMmHighestPhysicalPage; ULONG uAllocationGranularity; PVOID pLowestUserAddress; PVOID pMmHighestUserAddress; ULONG uKeActiveProcessors; BYTE bKeNumberProcessors; BYTE bUnknown2; WORD wUnknown3; } SYSTEM_BASIC_INFORMATION;typedef struct { LARGE_INTEGER liIdleTime; DWORD dwSpare[76]; } SYSTEM_PERFORMANCE_INFORMATION;typedef struct { LARGE_INTEGER liKeBootTime; LARGE_INTEGER liKeSystemTime; LARGE_INTEGER liExpTimeZoneBias; ULONG uCurrentTimeZoneId; DWORD dwReserved; } SYSTEM_TIME_INFORMATION; // ntdll!NtQuerySystemInformation (NT specific!) // // The function copies the system information of the // specified type into a buffer // // NTSYSAPI // NTSTATUS // NTAPI // NtQuerySystemInformation( // IN UINT SystemInformationClass, // information type // OUT PVOID SystemInformation, // pointer to buffer // IN ULONG SystemInformationLength, // buffer size in bytes // OUT PULONG ReturnLength OPTIONAL // pointer to a 32-bit // // variable that receives // // the number of bytes // // written to the buffer // ); typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);PROCNTQSI NtQuerySystemInformation; void main(void) { SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo; SYSTEM_TIME_INFORMATION SysTimeInfo; SYSTEM_BASIC_INFORMATION SysBaseInfo; double dbIdleTime; double dbSystemTime; LONG status; LARGE_INTEGER liOldIdleTime = {0,0}; LARGE_INTEGER liOldSystemTime = {0,0}; NtQuerySystemInformation = (PROCNTQSI)GetProcAddress( GetModuleHandle("ntdll"), "NtQuerySystemInformation" ); if (!NtQuerySystemInformation) return; // get number of processors in the system status = NtQuerySystemInformation(SystemBasicInformation,&SysBaseInfo,sizeof(SysBaseInfo),NULL); if (status != NO_ERROR) return;
printf("\nCPU Usage (press any key to exit): "); while(!_kbhit()) { // get new system time status = NtQuerySystemInformation(SystemTimeInformation,&SysTimeInfo,sizeof(SysTimeInfo),0); if (status!=NO_ERROR) return; // get new CPU's idle time status = NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL); if (status != NO_ERROR) return; // if it's a first call - skip it if (liOldIdleTime.QuadPart != 0) { // CurrentValue = NewValue - OldValue dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime); dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime); // CurrentCpuIdle = IdleTime / SystemTime dbIdleTime = dbIdleTime / dbSystemTime; // CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5; printf("\b\b\b\b%3d%%",(UINT)dbIdleTime); } // store new CPU's idle and system time liOldIdleTime = SysPerfInfo.liIdleTime; liOldSystemTime = SysTimeInfo.liKeSystemTime;
// KCpuUsage.h: interface for the KCpuUsage class.
//
//////////////////////////////////////////////////////////////////////
#if !defined(AFX_KCPUUSAGE_H__62F8228E_74CD_45FE_9C0A_3EA5F08C1FD4__INCLUDED_)
#define AFX_KCPUUSAGE_H__62F8228E_74CD_45FE_9C0A_3EA5F08C1FD4__INCLUDED_//#include <windows.h>
#include <conio.h>
#include <stdio.h>#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000#define SystemBasicInformation 0
#define SystemPerformanceInformation 2
#define SystemTimeInformation 3#define Li2Double(x) ((double)((x).HighPart) * 4.294967296E9 + (double)((x).LowPart))typedef struct
{
DWORD dwUnknown1;
ULONG uKeMaximumIncrement;
ULONG uPageSize;
ULONG uMmNumberOfPhysicalPages;
ULONG uMmLowestPhysicalPage;
ULONG uMmHighestPhysicalPage;
ULONG uAllocationGranularity;
PVOID pLowestUserAddress;
PVOID pMmHighestUserAddress;
ULONG uKeActiveProcessors;
BYTE bKeNumberProcessors;
BYTE bUnknown2;
WORD wUnknown3;
} SYSTEM_BASIC_INFORMATION;typedef struct
{
LARGE_INTEGER liIdleTime;
DWORD dwSpare[76];
} SYSTEM_PERFORMANCE_INFORMATION;typedef struct
{
LARGE_INTEGER liKeBootTime;
LARGE_INTEGER liKeSystemTime;
LARGE_INTEGER liExpTimeZoneBias;
ULONG uCurrentTimeZoneId;
DWORD dwReserved;
} SYSTEM_TIME_INFORMATION;// ntdll!NtQuerySystemInformation (NT specific!)
//
// The function copies the system information of the
// specified type into a buffer
//
// NTSYSAPI
// NTSTATUS
// NTAPI
// NtQuerySystemInformation(
// IN UINT SystemInformationClass, // information type
// OUT PVOID SystemInformation, // pointer to buffer
// IN ULONG SystemInformationLength, // buffer size in bytes
// OUT PULONG ReturnLength OPTIONAL // pointer to a 32-bit
// // variable that receives
// // the number of bytes
// // written to the buffer
// );
class KCpuUsage
{
public:
KCpuUsage();
virtual ~KCpuUsage();
bool Initialize();
int GetCpuUsage();
SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo;
SYSTEM_TIME_INFORMATION SysTimeInfo;
SYSTEM_BASIC_INFORMATION SysBaseInfo;
double dbIdleTime;
double dbSystemTime;
LONG status;
LARGE_INTEGER liOldIdleTime;
LARGE_INTEGER liOldSystemTime ;};#endif // !defined(AFX_KCPUUSAGE_H__62F8228E_74CD_45FE_9C0A_3EA5F08C1FD4__INCLUDED_)
#include "stdafx.h"
#include "KCpuUsage.h"
typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);
PROCNTQSI NtQuerySystemInformation;
KCpuUsage::KCpuUsage()
{
//liOldIdleTime = {0,0};
//liOldSystemTime = {0,0};
liOldIdleTime.u.HighPart = 0;
liOldIdleTime.u.LowPart = 0;
liOldSystemTime.u.HighPart=0;
liOldSystemTime.u.LowPart=0;
}
KCpuUsage::~KCpuUsage()
{
}
bool KCpuUsage::Initialize()
{
NtQuerySystemInformation = (PROCNTQSI)GetProcAddress(
GetModuleHandle("ntdll"),
"NtQuerySystemInformation"
);
if (!NtQuerySystemInformation)
return false;
// get number of processors in the system
status = NtQuerySystemInformation(SystemBasicInformation,&SysBaseInfo,sizeof(SysBaseInfo),NULL);
if (status != NO_ERROR)
return false;
return true;
}
int KCpuUsage::GetCpuUsage()
{
// get new system time
status = NtQuerySystemInformation(SystemTimeInformation,&SysTimeInfo,sizeof(SysTimeInfo),0);
if (status!=NO_ERROR)
return -1;
// get new CPU's idle time
status = NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL);
if (status != NO_ERROR)
return -1;
// if it's a first call - skip it
if (liOldIdleTime.QuadPart != 0)
{
// CurrentValue = NewValue - OldValue
dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime);
dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime);
// CurrentCpuIdle = IdleTime / SystemTime
dbIdleTime = dbIdleTime / dbSystemTime;
// CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors
dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5;
}
// store new CPU's idle and system time
liOldIdleTime = SysPerfInfo.liIdleTime;
liOldSystemTime = SysTimeInfo.liKeSystemTime;
return ( (int) dbIdleTime);
}
// cpusagent.cpp (Windows NT/2000)
//
// Getting the CPU usage in percent on Windows NT/2000
//
// (c)2000 Ashot Oganesyan K, SmartLine, Inc
// mailto:[email protected], http://www.protect-me.com, http://www.codepile.com#include <windows.h>
#include <conio.h>
#include <stdio.h>#define SystemBasicInformation 0
#define SystemPerformanceInformation 2
#define SystemTimeInformation 3#define Li2Double(x) ((double)((x).HighPart) * 4.294967296E9 + (double)((x).LowPart)) typedef struct
{
DWORD dwUnknown1;
ULONG uKeMaximumIncrement;
ULONG uPageSize;
ULONG uMmNumberOfPhysicalPages;
ULONG uMmLowestPhysicalPage;
ULONG uMmHighestPhysicalPage;
ULONG uAllocationGranularity;
PVOID pLowestUserAddress;
PVOID pMmHighestUserAddress;
ULONG uKeActiveProcessors;
BYTE bKeNumberProcessors;
BYTE bUnknown2;
WORD wUnknown3;
} SYSTEM_BASIC_INFORMATION; typedef struct
{
LARGE_INTEGER liIdleTime;
DWORD dwSpare[76];
} SYSTEM_PERFORMANCE_INFORMATION; typedef struct
{
LARGE_INTEGER liKeBootTime;
LARGE_INTEGER liKeSystemTime;
LARGE_INTEGER liExpTimeZoneBias;
ULONG uCurrentTimeZoneId;
DWORD dwReserved;
} SYSTEM_TIME_INFORMATION;
// ntdll!NtQuerySystemInformation (NT specific!)
//
// The function copies the system information of the
// specified type into a buffer
//
// NTSYSAPI
// NTSTATUS
// NTAPI
// NtQuerySystemInformation(
// IN UINT SystemInformationClass, // information type
// OUT PVOID SystemInformation, // pointer to buffer
// IN ULONG SystemInformationLength, // buffer size in bytes
// OUT PULONG ReturnLength OPTIONAL // pointer to a 32-bit
// // variable that receives
// // the number of bytes
// // written to the buffer
// );
typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);PROCNTQSI NtQuerySystemInformation;
void main(void)
{
SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo;
SYSTEM_TIME_INFORMATION SysTimeInfo;
SYSTEM_BASIC_INFORMATION SysBaseInfo;
double dbIdleTime;
double dbSystemTime;
LONG status;
LARGE_INTEGER liOldIdleTime = {0,0};
LARGE_INTEGER liOldSystemTime = {0,0}; NtQuerySystemInformation = (PROCNTQSI)GetProcAddress(GetModuleHandle("ntdll"),"NtQuerySystemInformation"); if (!NtQuerySystemInformation)
return;// get number of processors in the system
status = NtQuerySystemInformation(SystemBasicInformation,&SysBaseInfo,sizeof(SysBaseInfo),NULL);
if (status != NO_ERROR)
return; printf("\nCPU Usage (press any key to exit): ");
while(!_kbhit())
{
// get new system time
status = NtQuerySystemInformation(SystemTimeInformation,&SysTimeInfo,sizeof(SysTimeInfo),0);
if (status!=NO_ERROR)
return; // get new CPU's idle time
status =NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL);
if (status != NO_ERROR)
return; // if it's a first call - skip it
if (liOldIdleTime.QuadPart != 0)
{
// CurrentValue = NewValue - OldValue
dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime);
dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime); // CurrentCpuIdle = IdleTime / SystemTime
dbIdleTime = dbIdleTime / dbSystemTime; // CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors
dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5; printf("\b\b\b\b%3d%%",(UINT)dbIdleTime);
}// store new CPU's idle and system time
liOldIdleTime = SysPerfInfo.liIdleTime;
liOldSystemTime = SysTimeInfo.liKeSystemTime; // wait one second
Sleep(1000);
}
printf("\n");
}
//
// Getting the CPU usage in percent on Windows NT/2000
//
// (c)2000 Ashot Oganesyan K, SmartLine, Inc
// mailto:[email protected], http://www.protect-me.com, http://www.codepile.com#include <windows.h>
#include <conio.h>
#include <stdio.h>#define SystemBasicInformation 0
#define SystemPerformanceInformation 2
#define SystemTimeInformation 3#define Li2Double(x) ((double)((x).HighPart) * 4.294967296E9 + (double)((x).LowPart))typedef struct
{
DWORD dwUnknown1;
ULONG uKeMaximumIncrement;
ULONG uPageSize;
ULONG uMmNumberOfPhysicalPages;
ULONG uMmLowestPhysicalPage;
ULONG uMmHighestPhysicalPage;
ULONG uAllocationGranularity;
PVOID pLowestUserAddress;
PVOID pMmHighestUserAddress;
ULONG uKeActiveProcessors;
BYTE bKeNumberProcessors;
BYTE bUnknown2;
WORD wUnknown3;
} SYSTEM_BASIC_INFORMATION;typedef struct
{
LARGE_INTEGER liIdleTime;
DWORD dwSpare[76];
} SYSTEM_PERFORMANCE_INFORMATION;typedef struct
{
LARGE_INTEGER liKeBootTime;
LARGE_INTEGER liKeSystemTime;
LARGE_INTEGER liExpTimeZoneBias;
ULONG uCurrentTimeZoneId;
DWORD dwReserved;
} SYSTEM_TIME_INFORMATION;
// ntdll!NtQuerySystemInformation (NT specific!)
//
// The function copies the system information of the
// specified type into a buffer
//
// NTSYSAPI
// NTSTATUS
// NTAPI
// NtQuerySystemInformation(
// IN UINT SystemInformationClass, // information type
// OUT PVOID SystemInformation, // pointer to buffer
// IN ULONG SystemInformationLength, // buffer size in bytes
// OUT PULONG ReturnLength OPTIONAL // pointer to a 32-bit
// // variable that receives
// // the number of bytes
// // written to the buffer
// );
typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);PROCNTQSI NtQuerySystemInformation;
void main(void)
{
SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo;
SYSTEM_TIME_INFORMATION SysTimeInfo;
SYSTEM_BASIC_INFORMATION SysBaseInfo;
double dbIdleTime;
double dbSystemTime;
LONG status;
LARGE_INTEGER liOldIdleTime = {0,0};
LARGE_INTEGER liOldSystemTime = {0,0}; NtQuerySystemInformation = (PROCNTQSI)GetProcAddress(
GetModuleHandle("ntdll"),
"NtQuerySystemInformation"
); if (!NtQuerySystemInformation)
return; // get number of processors in the system
status = NtQuerySystemInformation(SystemBasicInformation,&SysBaseInfo,sizeof(SysBaseInfo),NULL);
if (status != NO_ERROR)
return;
printf("\nCPU Usage (press any key to exit): ");
while(!_kbhit())
{
// get new system time
status = NtQuerySystemInformation(SystemTimeInformation,&SysTimeInfo,sizeof(SysTimeInfo),0);
if (status!=NO_ERROR)
return; // get new CPU's idle time
status = NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL);
if (status != NO_ERROR)
return; // if it's a first call - skip it
if (liOldIdleTime.QuadPart != 0)
{
// CurrentValue = NewValue - OldValue
dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime);
dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime); // CurrentCpuIdle = IdleTime / SystemTime
dbIdleTime = dbIdleTime / dbSystemTime; // CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors
dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5; printf("\b\b\b\b%3d%%",(UINT)dbIdleTime);
} // store new CPU's idle and system time
liOldIdleTime = SysPerfInfo.liIdleTime;
liOldSystemTime = SysTimeInfo.liKeSystemTime;
// wait one second
Sleep(1000);
}
printf("\n");
}