cvs commit: src/sys/kern sched_ule.c

[Jeff Roberson]

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

  FreeBSD src repository

  Modified files:
    sys/kern             sched_ule.c 
  Log:
   - Refine the load balancer to improve buildkernel times on dual core
     machines.
   - 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 rinet.ru>
  Approved by:    re
  
  Revision  Changes    Path
  1.202     +29 -47    src/sys/kern/sched_ule.c