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RedHat 9 (Linux i386) - man page for sched_rr_get_interval (redhat section 2)

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 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_SCHEDUL-
       ING 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			       RR_GET_INTERVAL(2)


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