sched_rr_get_interval(3)				     Library Functions Manual					  sched_rr_get_interval(3)

NAME

       sched_rr_get_interval - Returns the current quantum for process execution under the SCHED_RR policy (P1003.1b)

LIBRARY

       Realtime Library (librt.so, librt.a)

SYNOPSIS

       #include <sched.h>

       int sched_rr_get_interval (
       pid_t pid,
       struct timespec *interval);

PARAMETERS

       pid	   Specifies the ID of the process for which the quantum is to be returned.

       *interval   Specifies the location to receive the current quantum for process execution under the SCHED_RR scheduling policy.

DESCRIPTION

       The  sched_rr_get_interval  function  updates the timespec structure referenced by the interval argument to contain the current quantum for
       the process executing under the SCHED_RR policy. If a process running under the round-robin scheduling  policy  runs  without  blocking	or
       yielding for more than this amount of time, it may be preempted by another runnable process (at the same priority).

       If the PID argument is zero, the current execution time limit for the calling process is returned.

       No special privileges are needed to use the sched_rr_get_interval function.

RETURN VALUES

       On  a successful call, a value of 0 (zero) is returned. On an unsuccessful call, a value of -1 is returned and errno is set to indicate the
       error.

ERRORS

       The sched_rr_get_interval fails under the following condition:

       [ESRCH]	      The value of the pid parameter does not indicate an existing process.

RELATED INFORMATION

       Functions: sched_getparam(3), sched_getscheduler(3), sched_setparam(3), sched_setscheduler(3)

       Guide to Realtime Programming delim off

															  sched_rr_get_interval(3)