Native worker "preemption" via monitor thread

[KCreate]

• System monitor thread
  • Checks if worker threads exceed their alloted timeslice
  • Detects idle processors and assigns new worker threads
• Worker threads inside native mode that exceed their alloted timeslice will be marked as preempted by the system monitor thread.
  • The runtime will release the processor from the worker thread and will return it to the idle list of processors
  • The system monitor now detects that there are idle processors, but no idle worker threads, so the runtime will start a new worker thread that acquires the processor
  • Once the prempted worker thread returns from the native section it will check if it was preempted
  • If the worker was pre-empted, we try to reacquire the old processor
  • If reacquiring the old processor fails, try to acquire another idle processor
  • If there are no idle processors, idle the current worker thread and reschedule the running fiber into the global runqueue