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Manpages RR_GET_INTERVALSection: Linux Programmer's Manual (2)Updated: 1996-04-10 Index Return to Main Contents NAMEsched_rr_get_interval - get the SCHED_RR interval for the named processSYNOPSIS#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 */ }; DESCRIPTIONsched_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 VALUEOn success, sched_rr_get_interval returns 0. On error, -1 is returned, and errno is set appropriately.ERRORS
CONFORMING TOPOSIX.1b (formerly POSIX.4)BUGSAs 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 ALSOsched_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
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