cpu.rar_CPU 率_CPU使用率_cpu_cpu 使用率_visual c

#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}; // 本文转自 C++Builder 研究 - http://www.ccrun.com/article.asp?i=424&d=7jw23a 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"); } //------------------------------------------------------------- /* //W9X: #include <windows.h> #include <conio.h> #include <stdio.h> void main(void) { HKEY hkey; DWORD dwDataSize; DWORD dwType; DWORD dwCpuUsage; // starting the counter if ( RegOpenKeyEx( HKEY_DYN_DATA, "PerfStats\\StartStat", 0,KEY_ALL_ACCESS, &hkey ) != ERROR_SUCCESS) return ; dwDataSize=sizeof(DWORD); RegQueryValueEx( hkey, "KERNEL\\CPUUsage", NULL,&dwType, (LPBYTE)&dwCpuUsage, &dwDataSize ); RegCloseKey(hkey); // geting current counter's value if ( RegOpenKeyEx( HKEY_DYN_DATA, "PerfStats\\StatData", 0,KEY_READ, &hkey ) != ERROR_SUCCESS) return; printf("\nCPU Usage (press any key to exit): "); while(!_kbhit()) { dwDataSize=sizeof(DWORD); RegQueryValueEx( hkey, "KERNEL\\CPUUsage", NULL,&dwType, (LPBYTE)&dwCpuUsage, &dwDataSize ); Sleep(500); printf("\b\b\b\b%3d%%",dwCpuUsage); } printf("\n"); RegCloseKey(hkey); // stoping the counter if ( RegOpenKeyEx( HKEY_DYN_DATA, "PerfStats\\StopStat", 0,KEY_ALL_ACCESS, &hkey ) != ERROR_SUCCESS) return; dwDataSize=sizeof(DWORD); RegQueryValueEx( hkey, "KERNEL\\CPUUsage", NULL,&dwType, (LPBYTE)&dwCpuUsage, &dwDataSize ); RegCloseKey(hkey); } */