CODEWITHSUNDEEP
c#cpu-usagethread-prioritycpu-time
Igor Gajic
Igor Gajic

Reputation: 39

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

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.

Upvotes: 3

Views: 1664

Answers (1)

Remus Rusanu
Remus Rusanu

Reputation: 294467

  • 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.

Upvotes: 8

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