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Sir_Yaro

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phranzee Newbie

phranzee

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Here is a document I got from a web site:The one of most popular question I see in the newsgroups is a question aboutreceiving and calculating the CPU usage, so I've decided to describe it inthis trick. At first, I should say that there is a big difference betweengetting the CPU usage on Windows 95/98 and on Windows NT/2000, in thisarticle I'll show you a method that perfectly works on Windows 9x (forexample in my free screen saver - CPU Indicator SS ). About getting the CPUusage on NT you'll read in my next trick.Like NT the Windows 9x has the Performance Counters but on Windows 9x theyare more easy to use so we will use one of these counters to receive the CPUusage.Our first step is starting selected counter because by default all countersare stoped. To start the counter we should read the corresponding registrykey:HKEY hkey;RegOpenKeyEx ( HKEY_DYN_DATA,"PerfStats\\StartStat",0,KEY_ALL_ACCESS,&hkey );DWORD dwDataSize;DWORD dwType;DWORD dwDummy;dwDataSize=sizeof(dwDummy); RegQueryValueEx ( hkey,"KERNEL\\CPUUsage",NULL,&dwType,(LPBYTE)&dwDummy,&dwDataSize );RegCloseKey(hkey);The next step is reading the CPU usage directly from the registry:HKEY hkey;RegOpenKeyEx ( HKEY_DYN_DATA,"PerfStats\\StatData",0,KEY_ALL_ACCESS,&hkey );DWORD dwDataSize;DWORD dwType;DWORD dwCpuUsage;dwDataSize=sizeof(dwCpuUsage); RegQueryValueEx ( hkey,"KERNEL\\CPUUsage",NULL,&dwType,(LPBYTE)&dwCpuUsage,&dwDataSize );RegCloseKey(hkey);Now the dwCpuUsage variable contains current CPU usage in percent. Youshould call above code in the loop to see the dynamic changes.And the final step is stoping the counter previously started:HKEY hkey;RegOpenKeyEx ( HKEY_DYN_DATA,"PerfStats\\StopStat",0,KEY_ALL_ACCESS,&hkey );DWORD dwDataSize;DWORD dwType;DWORD dwDummy;dwDataSize=sizeof(dwDummy); RegQueryValueEx ( hkey,"KERNEL\\CPUUsage",NULL,&dwType,(LPBYTE)&dwDummy,&dwDataSize );RegCloseKey(hkey);-------------------#include <winreg.h>int getCpuUsage(void){  int trug=-1;  DWORD rc;  HKEY hOpen;  LPVOID lpMsgBuf;  unsigned char data[4];  unsigned long size=4;  bool error=false;  if ((rc = RegOpenKeyEx(HKEY_DYN_DATA,"PerfStats\\StatData", 0,KEY_READ,&hOpen)) == ERROR_SUCCESS)  {    if ((rc=RegQueryValueEx(hOpen,"KERNEL\\CPUUsage",NULL,NULL,(unsignedchar *)data,&size)) == ERROR_SUCCESS)      trug=data[0];    else error=true;    RegCloseKey(hOpen);  }  else error=true;  if (error)  {    FormatMessage(      FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,      NULL,      rc,      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),      (LPSTR) &lpMsgBuf,      0,      NULL);    MessageBox( NULL, (LPSTR)lpMsgBuf, "Fout", MB_OK|MB_ICONINFORMATION );    LocalFree( lpMsgBuf );  } return trug;}------------------------#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("bbbb%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:ashot@aha.ru, 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("bbbb%3d%%",(UINT)dbIdleTime);       }        // store new CPU's idle and system time        liOldIdleTime = SysPerfInfo.liIdleTime;        liOldSystemTime = SysTimeInfo.liKeSystemTime;          // wait one second        Sleep(1000);    }    printf("n");}
sie mi po dysku poniewieralo, moze cos wyskubiesz z tego. pewnie gdzies jeszcze mam chodzacy program :)

 

tak, wiem ze duzo wkleilem ;]

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