How can i limit cpu usage of windows processes using C#

Question

I need to write a class that will attach to certain windows processes, monitor and limit their cpu usage. Process priority changing would not help me at all so i really need to write a program that is basically similar to BES or ThreadMaster. So i need to make a class that's doing something like this (pseudo code):

public void cpuLimiter(pid)
{
    ProcessHandle handle = attachToProcess(pid);
    while (cpuLimiting)
    {
        if (handle.cpuUsage > 30%)
        {
            handle.sleep(100miliseconds);
        }
        sleep(10miliseconds);
    }
    closeHandle(pid);
}

I hope i made it clear what i want to accomplish, just i have no idea how. Every help is appreciated.

beg you for the most complete code This kind of makes it sound like you want us to just spoon-feed you a solution rather than addressing a specific problem with code you've written. The latter is a good question, the former is not. Please show what you've tried. — tnw
– tnw, Commented Aug 18, 2014 at 14:28
It is definitely going to be harder than what you think. Can't be answered in StackOverflow answer. Try something, run into a specific problem. Come here. We're happy to help. — Sriram Sakthivel
– Sriram Sakthivel, Commented Aug 18, 2014 at 14:31
possible duplicate of How can I programmatically limit my program's CPU usage to below 70%? — Yair Nevet
– Yair Nevet, Commented Aug 18, 2014 at 14:32
tnw thanks for your remark, i agree with you, actually i didnt ask for a complete solution, i was just afraid if someone sends me to some assembly stuff, and i know i wouldnt even understand it — Igor Gajic
– Igor Gajic, Commented Aug 18, 2014 at 14:49
Is there any way to just send sleep(x miliseconds) to another process in windows? everything else i can improvise or i have already done, but i have no idea at all how to send sleep or suspend / start to another process in windows. — Igor Gajic
– Igor Gajic, Commented Aug 18, 2014 at 14:52

Community · Accepted Answer · 2017-05-23 12:33:54Z

8

You create a JOB object
You limit the CPU for the JOB
you attach the target process to the JOB

See Job Objects, CreateJobObject, SetInformationJobObject and JOBOBJECT_CPU_RATE_CONTROL_INFORMATION, AssignProcessToJobObject. Do not attempt to hand-craft your own in-house process throttling, let the component specifically designed for this task (ie. jobs) handle the task.

See Working example of CreateJobObject/SetInformationJobObject pinvoke in .net? for managed usage of the NT Job native API.

edited May 23, 2017 at 12:33

CommunityBot

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answered Aug 18, 2014 at 14:34

Remus Rusanu

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1 Comment

Igor Gajic Over a year ago

Thanks a bunch for your answer, it will take me lots of time to understand this so im gonna get on it.

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