Getting current cpu usage in c++/windows for particular process

问题

I want to calculate current cpu usage for particular application in my code. I looked up on internet and found pdh library for windows. When I tried it I am getting overall cpu usage not cpu usage for one process.

PdhAddCounter(hquery, TEXT("\\Processor(_Total)\\% Processor Time"),0,&counter);

So what I do with this line to get cpu usage for particular process? I tried replacing _Total with process name(explorer). At that time I am getting 0 cpu usage. But I checked in resource monitor that opening many windows at a time increased cpu usage upto 20%. Still in log file cpu usage is showing 0.

Can anyone help me with this?

thanks in advance.

回答1:

You need to use GetProcessTimes

And unfortunately, it won't give you the "CPU usage", it will give you the amount of CPU-time since the process started. So to get CPU usage, you will need to take one sample, store that, and then take another sample a known amount of time later, and then calculate the time (and if you want to know the total usage, you'll need to add the usertime and kerneltime together, of course).

回答2:

You can check this for example. Explained everything in that project. It will give memory based on process id(same way shown in task manager)

Thanks, Darshan

来源：https://stackoverflow.com/questions/18095994/getting-current-cpu-usage-in-c-windows-for-particular-process