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sched_rr_get_interval(3)
NAME
  sched_rr_get_interval - Return the current quantum for process execution
  under the SCHED_RR policy (P1003.1b)

SYNOPSIS
  #include <sched.h>

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

PARAMETERS
  pid	      Specifies the process for which the quantum is returned.

  *interval   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 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)

Index for Section 3

Alphabetical listing for S

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