i want to generate interrupt every 100 microseconds on windows. Actually i couldnt do this on windows,because windows does not guarantee the interrupts less then 500 microseconds. So, i generate 2 threads. One of them is for timer counter(query performance counter), the other thread is the actual work. When timer counter is 100 microseconds, it change the state of the other thread(actual work) . But i have problem with race condition, because i dont want the threads wait each others, they must always run. So actually i need interrupts. How do i write such fast interrupt on windows with c++?
Generating interrupt each 100 microsecond on windows
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To avoid having two threads communicating when you have these short time windows, I'd put both the work and the timer in a loop in one thread.
std::this_thread::sleep_until
to do such a sleep, but in this case, when the naps are so short, it often becomes a little too inaccurate, so I suggest busy-waiting in a tight loop that just checks the time.In this example a worker thread runs for 10s without doing any real work. On my machine I could add work consisting of ~3000 additions in the slot where you are supposed to do your work before the whole loop started taking more than 100μs, so you'd better do what you aim to do really fast.
Example:
Possible output:
It takes a few clock cycles to get the thread started so don't worry about the number of loops not being exactly on target. Double the time the thread runs and you should still stay close to the target number of loops. What matters is that it's pretty good (but not realtime-good) once it's started running.