K 10
svn:author
V 4
jeff
K 8
svn:date
V 27
2007-01-04T12:16:19.000000Z
K 7
svn:log
V 815
 - Only allow the tdq_idx to increase by one each tick rather than up to
   the most recently chosen index.  This significantly improves nice
   behavior.  This allows a lower priority thread to run some multiple of
   times before the higher priority thread makes it to the front of
   the queue.  A nice +20 cpu hog now only gets ~5% of the cpu when running
   with a nice 0 cpu hog and about 1.5% with a nice -20 hog.  A nice
   difference of 1 makes a 4% difference in cpu usage between two hogs.
 - Track a seperate insert and removal index.  When the removal index is
   empty it is updated to point at the current insert index.
 - Don't remove and re-add a thread to the runq when it is being adjusted
   down in priority.
 - Pull some conditional code out of sched_tick().  It's looking a bit
   large now.

END