:man| Alphabetical   Categories   About us 
 
RR_GET_INTERVAL (2) | System calls | Unix Manual Pages | :man

NAME

sched_rr_get_interval - get the SCHED_RR interval for the named process

CONTENTS

Synopsis
Description
Errors
Bugs

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_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.
EINVAL Invalid pid.
EFAULT Problem with copying information to userspace.

"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) ISO/IEC 9945-1:1996


Share this page

     Follow us

Facebook Twitter Google+ LinkedIn


 
Created by Blin Media, 2008-2013