threads start with a @var{nice} value inherited from their parent
thread. You must implement the functions described below, which are for
use by test programs. We have provided skeleton definitions for them in
-@file{threads/thread.c}. by test programs
+@file{threads/thread.c}.
@deftypefun int thread_get_nice (void)
Returns the current thread's @var{nice} value.
@node 4.4BSD Scheduler Summary
@section Summary
-This section summarizes the calculations required to implement the
-scheduler. It is not a complete description of scheduler requirements.
+The following formulas summarize the calculations required to implement the
+scheduler. They are not a complete description of scheduler requirements.
Every thread has a @var{nice} value between -20 and 20 directly under
its control. Each thread also has a priority, between 0
(@code{PRI_MIN}) through 63 (@code{PRI_MAX}), which is recalculated
-using the following formula whenever the value of either variable term
-changes:
+using the following formula every fourth tick:
@center @t{@var{priority} = @code{PRI_MAX} - (@var{recent_cpu} / 4) - (@var{nice} * 2)}.