RR_GET_INTERVAL(2)  Linux Programmer's Manual  RR_GET_INTERVAL(2)

NAME
       sched_rr_get_interval  - get the SCHED_RR interval for the
       named process

SYNOPSIS
       #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
       sched_rr_get_interval  writes  into the timespec structure
       pointed to by tp the round robin time quantum for the pro-
       cess  identified  by pid. If pid is zero, the time quantum
       for the calling process is written into *tp.  The  identi-
       fied process should be running under the SCHED_RR schedul-
       ing 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
       On success, sched_rr_get_interval returns 0.  On error, -1
       is returned, and errno is set appropriately.

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

       ENOSYS  The system call is not yet implemented.

CONFORMING TO
       POSIX.1b (formerly POSIX.4)

BUGS
       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
       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                          1