CODEWITHSUNDEEP
c++pdh
puelo
puelo

Reputation: 5987

PDH cant access total CPU time through PdhAddCounter()

i am currently trying to make some sort of CPU usage overview for my DirectX program, but it seems that i am not able to get this information through PdhAddCounter(). My code looks like this:

status = PdhOpenQuery(NULL, 0, &m_queryHandle);
    if(status != ERROR_SUCCESS)
    {
        m_canReadCpu = false;
    }

status = PdhAddCounter(m_queryHandle, TEXT("\\Processor(_Total)\\% processor time"), 0, &m_counterHandle);
    if(status != ERROR_SUCCESS)
    {
        m_canReadCpu = false;
    }

After the PdhAddCounter call my status is = -1073738824, wich causes the program to fail.

Im using a Windows 7 64bit system, do i have to make something different in a 64bit environment? Thanks for any help.

Upvotes: 0

Views: 4169

Answers (2)

Arty
Arty

Reputation: 763

You may also want to use GetSystemTimes kernel32 API which will free you from the dependency on pdh.dll.

See my answer here.

Upvotes: 0

david.jugon
david.jugon

Reputation: 51

Remember: PdhAddCounter is locale sensible.

The response -1073738824 means PDH_CSTATUS_NO_OBJECT=0xC0000BB8. The api didn't find that string. Are you using a non-english OS?

If you need to do a Windows XP compatible application you need to use a workaround like this: http://en.verysource.com/code/3604946_1/platforminfo.cpp.html.

For Vista and Windows 7, 8,... you can use PdhAddEnglishCounter instead.

Upvotes: 2

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