Arguments

 

thread

   Thread whose scheduling policy and parameters are to be changed.
 

policy

   New scheduling policy value for the thread specified in thread.
   The following are valid values:

      SCHED_BG_NP
      SCHED_FG_NP
      SCHED_FIFO
      SCHED_OTHER
      SCHED_RR
 

param

   New values of the scheduling parameters associated with the
   scheduling policy for the thread specified in thread. Valid
   values for the sched_priority field of a sched_param structure
   depend on the chosen scheduling policy. Use the POSIX routines
   sched_get_priority_min() or sched_get_priority_max()  to
   determine the low and high limits of each policy.

   Additionally, the Threads Librray provides nonportable priority
   range constants, as follows:

   Low              High

   PRI_FIFO_MIN     PRI_FIFO_MAX
   PRI_RR_MIN       PRI_RR_MAX
   PRI_OTHER_MIN    PRI_OTHER_MAX
   PRI_FG_MIN_NP    PRI_FG_MAX_NP
   PRI_BG_MIN_NP    PRI_BG_MAX_NP

   The default priority varies by platform. On Tru64 UNIX, the
   default is 19 (that is, the POSIX priority of a normal timeshare
   process). On other platforms the default priority is the midpoint
   between PRI_FG_MIN_NP and PRI_FG_MAX_NP.