cvs commit: src/sys/kern sched_ule.c

[Jeff Roberson]

jeff        2003/12/11 23:33:51 PST

  FreeBSD src repository

  Modified files:
    sys/kern             sched_ule.c 
  Log:
   - Now that we have kseq groups, balance them seperately.
   - The new sched_balance_groups() function does intra-group balancing while
     sched_balance() balances the available groups.
   - Pick a random time between 0 ticks and hz * 2 ticks to restart each
     balancing process.  Each balancer has its own timeout.
   - Pick a random place in the list of groups to start the search for lowest
     and highest group loads.  This prevents us from prefering a group based on
     numeric position.
   - Use a nasty hack to stop us from preferring cpu 0.  The problem is that
     softclock always runs on cpu 0, so it always has a little extra load.  We
     ignore this load in the balancer for now.  In the future softclock should
     run on a random cpu and these hacks can go away.
  
  Revision  Changes    Path
  1.89      +130 -47   src/sys/kern/sched_ule.c