问：如何编程监控CPU的占用情况？

wycaicai 2005-03-26 08:42:34

如何编程监控CPU的占用情况？
百分之多少？
类似任务管理器中的那个！

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pepsi1980 2005-03-28

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去vcbak上面去找！

liuyan4794 2005-03-27

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sjcode 2005-03-26

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学习

lemon_wei 2005-03-26

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我这有段2000的，你可以参考，出自VC知识库，非本人所写。
--------------------------------------------------
#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;

LARGE_INTEGER m_liOldIdleTime;
LARGE_INTEGER m_liOldSystemTime;
unsigned long m_fNewUsges;
----------------------------------

void CMy111View::OnCpuUse()
{
// TODO: Add your command handler code here
char CpuUse[20];
SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo;
SYSTEM_TIME_INFORMATION SysTimeInfo;
SYSTEM_BASIC_INFORMATION SysBaseInfo;
double dbIdleTime;
double dbSystemTime;
LONG status;
typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);
PROCNTQSI NtQuerySystemInformation;

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;
}

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 (m_liOldIdleTime.QuadPart != 0)
{
// CurrentValue = NewValue - OldValue
dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(m_liOldIdleTime);
dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(m_liOldSystemTime);

// CurrentCpuIdle = IdleTime / SystemTime
dbIdleTime = dbIdleTime / dbSystemTime;

// CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors
dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5;

m_fNewUsges = (UINT)dbIdleTime;
sprintf(CpuUse,"%d%%",m_fNewUsges);
AfxMessageBox(CpuUse);
}

// store new CPU's idle and system time
m_liOldIdleTime = SysPerfInfo.liIdleTime;
m_liOldSystemTime = SysTimeInfo.liKeSystemTime;

}

wycaicai 2005-03-26