cvs commit: src/sys/kern sched_ule.c

Jeff Roberson jeff at
Thu Jul 19 20:03:16 UTC 2007

jeff        2007-07-19 20:03:15 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             sched_ule.c 
   - Refine the load balancer to improve buildkernel times on dual core
   - Leave the long-term load balancer running by default once per second.
   - Enable stealing load from the idle thread only when the remote processor
     has more than two transferable tasks.  Setting this to one further
     improves buildworld.  Setting it higher improves mysql.
   - Remove the bogus pick_zero option.  I had not intended to commit this.
   - Entirely disallow migration for threads with SRQ_YIELDING set.  This
     balances out the extra migration allowed for with the load balancers.
     It also makes pick_pri perform better as I had anticipated.
  Tested by:      Dmitry Morozovsky <marck at>
  Approved by:    re
  Revision  Changes    Path
  1.202     +29 -47    src/sys/kern/sched_ule.c

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