NAME    [Toc]    [Back]

       sched_rr_get_interval   -  get  the  SCHED_RR  interval	for  the named
       process

SYNOPSIS    [Toc]    [Back]

       #include <sched.h>

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

       struct timespec {
	   time_t  tv_sec;     /* seconds */
	   long    tv_nsec;    /* nanoseconds */
       };

DESCRIPTION    [Toc]    [Back]

       sched_rr_get_interval writes into the timespec structure pointed to  by
       tp  the	round robin time quantum for the process identified by pid. If
       pid is zero, the time quantum for the calling process is  written  into
       *tp. The identified process should be running under the SCHED_RR scheduling
 policy.

       The round robin time quantum value is not alterable under Linux 1.3.81.

       POSIX  systems  on  which  sched_rr_get_interval  is  available	define
       _POSIX_PRIORITY_SCHEDULING in <unistd.h>.

RETURN VALUE    [Toc]    [Back]

       On success, sched_rr_get_interval returns 0.  On error, -1 is returned,
       and errno is set appropriately.

ERRORS    [Toc]    [Back]

       ESRCH  The process whose ID is pid could not be found.

       ENOSYS The system call is not yet implemented.

CONFORMING TO    [Toc]    [Back]

       POSIX.1b (formerly POSIX.4)

BUGS    [Toc]    [Back]

       As  of  Linux  1.3.81  sched_rr_get_interval returns with error ENOSYS,
       because SCHED_RR has not yet been fully implemented  and  tested  properly.

SEE ALSO    [Toc]    [Back]

       sched_setscheduler(2) has a description of the Linux scheduling scheme.

       Programming for the real  world	-  POSIX.4  by	Bill  O.  Gallmeister,
       O'Reilly & Associates, Inc., ISBN 1-56592-074-0
       IEEE Std 1003.1b-1993 (POSIX.1b standard, formerly POSIX.4)
       ISO/IEC 9945-1:1996



Linux 1.3.81			  1996-04-10		    RR_GET_INTERVAL(2)