cvs commit: src/sys/kern sched_ule.c

[Jeff Roberson]

jeff        2007-01-25 23:52:00 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             sched_ule.c 
  Log:
   - Implement much more intelligent ipi sending.  This algorithm tries to
     minimize IPIs and rescheduling when scheduling like tasks while keeping
     latency low for important threads.
     1) An idle thread is running.
     2) The current thread is worse than realtime and the new thread is
        better than realtime.  Realtime to realtime doesn't preempt.
     3) The new thread's priority is less than the threshold.
  
  Revision  Changes    Path
  1.186     +23 -11    src/sys/kern/sched_ule.c