CODEWITHSUNDEEP
multithreadingperformanceprocessboinc
tunnuz
tunnuz

Reputation: 24008

How to adaptively adjust performance to CPU usage?

there. I don't even know if this question makes sense, however: how do BOINC-based applications adapt their performance so that they only use "free" CPU, without affecting the execution of user's applications?

Thank you,
Tunnuz

Upvotes: 0

Views: 178

Answers (2)

Vinicius Kamakura
Vinicius Kamakura

Reputation: 7778

They set their process priority to the same as the idle thread?

In windows SetPriorityClass() about IDLE_PRIORITY_CLASS:

Process whose threads run only when the system is idle. The threads of the process are preempted by the threads of any process running in a higher priority class. An example is a screen saver. The idle-priority class is inherited by child processes.

More about scheduling priorities in windows here

Upvotes: 2

Jeremy Friesner
Jeremy Friesner

Reputation: 73161

Most likely they just set the priority of their computation thread(s) to something very low, and then rely on the OS's scheduler to do the rest. Threads/processes with a low priority will only run when no other threads need the CPU time for anything.

Upvotes: 1

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