C++ Windows 获取CPU利用率【转】-白红宇

C++ Windows 获取CPU利用率【转】

阅读量：4980 次

发布时间：2019-06-12

本文共 1874 字，大约阅读时间需要 6 分钟。

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           #pragma comment(lib, "pdh.lib")#define COUNT_INTERVAL 1000const TCHAR *pszPathBuff=_T("\\Processor(_Total)\\% Processor Time");//% Processor Time 指处理器用来执行非闲置线程时间的百分比。//计算方法是，测量范例间隔内非闲置线程活动的时间，用范例间隔减去该值。//(每台处理器有一个闲置线程，该线程在没有其他线程可以运行时消耗周期)。//这个计数器是处理器活动的主要说明器，显示在范例间隔时所观察的繁忙时间平均百分比。//这个值是用 100% 减去该服务不活动的时间计算出来的。int main(){ HQUERY hQuery; HCOUNTER hCounter; PDH_STATUS pdhStatus; PDH_FMT_COUNTERVALUE fmtValue; DWORD ctrType; SYSTEMTIME stSampleTime; __try { pdhStatus = PdhOpenQuery(NULL, NULL, &hQuery); if (ERROR_SUCCESS != pdhStatus) { _tprintf(TEXT("PdhOpenQuery failed with %ld.\n"), pdhStatus); __leave; } pdhStatus = PdhAddCounter (hQuery, pszPathBuff, 0, &hCounter); if (ERROR_SUCCESS != pdhStatus) { _tprintf(TEXT("PdhBrowseCounters failed with 0x%x.\n"), pdhStatus); __leave; } pdhStatus = PdhCollectQueryData (hQuery); if (ERROR_SUCCESS != pdhStatus) { _tprintf(TEXT("PdhCollectQueryData failed with 0x%x.\n"), pdhStatus); __leave; } while (!_kbhit()) { Sleep(COUNT_INTERVAL); GetLocalTime (&stSampleTime); pdhStatus = PdhCollectQueryData (hQuery); _tprintf ( TEXT("\n\"%2.2d/%2.2d/%4.4d %2.2d:%2.2d:%2.2d.%3.3d\""), stSampleTime.wMonth, stSampleTime.wDay, stSampleTime.wYear, stSampleTime.wHour, stSampleTime.wMinute, stSampleTime.wSecond, stSampleTime.wMilliseconds); pdhStatus = PdhGetFormattedCounterValue (hCounter, PDH_FMT_DOUBLE, &ctrType, &fmtValue); if (pdhStatus == ERROR_SUCCESS) { _tprintf (TEXT(",\"%.20g\""), fmtValue.doubleValue); } else { _tprintf(TEXT("\nPdhGetFormattedCounterValue failed with 0x%x.\n"), pdhStatus); __leave; } } } __finally { if (hQuery) PdhCloseQuery (hQuery); } return pdhStatus;}