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吹泡泡的小猫 2008-08-22
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使用系统的性能计数，就是PDH，有个达人对此有个封装类，就是Cpdh，google一下
飘雪831101 2008-08-22
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如果获得具体某个进行的CPU使用率呢?
飘雪831101 2008-08-22
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我用pdh中的添加计数器时,返回值是错误的.那名称应该如何写啊?
pdhStatus = PdhAddCounter (hQuery, TEXT("\\Network Interface(Realtek RTL8139 Family PCI Fast Ethernet NIC)\\Byte Total"), 0, pCounterHandle);
这样正确吗?Network Interface(网卡型号).
pdhStatus = PdhAddCounter (hQuery, TEXT("\\Network Interface(Realtek RTL8139 Family PCI Fast Ethernet NIC)\\Byte Total"), 0, pCounterHandle);
这样正确吗?Network Interface(网卡型号).
飘雪831101 2008-08-22
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我能再顺便问一下,如何获得网卡的使用率?就像任务管理器中的那样.
flm007 2008-08-21
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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;
}
MEMORYSTATUS MemStat;
MemStat.dwLength = sizeof(MEMORYSTATUS);
GlobalMemoryStatus(&MemStat);
m_ulNewUsges = MemStat.dwMemoryLoad;
使用：
CMemUsgesCtl m_ MyMemCtrl;
CCpuUsgesCtl m_ MyCpuCtrl;
…………
if(!m_MyCpuCtrl.Create(WS_CHILD | WS_VISIBLE, rect, this, IDC_CPUCTL))
{
TRACE0("Create m_MyCtrl Failed!");
return 0;
}
rect.left = rect.right + 20;
rect.right += lpCreateStruct->cx / 2;
if(!m_MyMemCtrl.Create(WS_CHILD | WS_VISIBLE,rect, this, IDC_MEMCTL))
{
TRACE0("Create m_MyCtrl Failed!");
return 0;
}
weiym 2008-08-21
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http://www.vckbase.com/document/finddoc.asp?keyword=CPU
cnzdgs 2008-08-21
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OpenProcess、GetProcessTimes可以获得各个进程的运行时间，自己定时获取进程的运行时间来计算CPU使用率。
