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我试图获得网络适配器利用率,如任务管理器中所示。 我现在试着使用WMI,并且我能够获得每秒接收的字节数/每秒发送的字节数。有没有办法获得任务管理器中显示的预计算值(0-100%),还是可以使用这些值来计算该值?C++像任务管理器一样获得网络利用率
IEnumWbemClassObject* pEnumerator = NULL;
hres = pSvc->ExecQuery(
bstr_t("WQL"),
bstr_t("SELECT * FROM Win32_PerfRawData_Tcpip_NetworkInterface"),
WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
NULL,
&pEnumerator);
if (FAILED(hres))
{
cout << "Query for operating system name failed."
<< " Error code = 0x"
<< hex << hres << endl;
pSvc->Release();
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}
// Get the data from the query
IWbemClassObject *pclsObj = NULL;
ULONG uReturn = 0;
while (pEnumerator)
{
HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,
&pclsObj, &uReturn);
if (0 == uReturn)
{
break;
}
VARIANT vtProp;
VariantInit(&vtProp);
hr = pclsObj->Get(L"Name", 0, &vtProp, 0, 0);
wcout << " network adapter : " << vtProp.bstrVal << endl;
VariantClear(&vtProp);
hr = pclsObj->Get(L"BytesReceivedPerSec", 0, &vtProp, 0, 0);
wcout << " BytesReceivedPerSec : " << vtProp.bstrVal << endl;
VariantClear(&vtProp);
hr = pclsObj->Get(L"BytesSentPerSec", 0, &vtProp, 0, 0);
wcout << " BytesSentPerSec : " << vtProp.bstrVal << endl;
VariantClear(&vtProp);
hr = pclsObj->Get(L"Timestamp_Sys100NS", 0, &vtProp, 0, 0);
wcout << " Timestamp_Sys100NS : " << vtProp.bstrVal << endl;
VariantClear(&vtProp);
pclsObj->Release();
}
感谢您指点我这个方向,但是这个计算即使没有太多的网络流量,所有时间都会超过97%。 – user1754598
我的不好,默认的比例是-6 ...和位/秒 –
感谢您的支持,但我仍然没有得到任何有意义的价值。我在下面的链接中找到了这篇文章,尽管这个例子是针对C#的,它看起来就是它为任务管理器所做的。我会用C++试试这个https://web.archive.org/web/20080315235958/http://nayyeri.net/blog/how-to-calculate-network-utilization-in-net/ – user1754598