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SCHED_SETPARAM(2) Linux Programmer's Manual SCHED_SETPARAM(2)
NAME
sched_setparam, sched_getparam - set and get scheduling parameters
SYNOPSIS
#include <sched.h>
int sched_setparam(pid_t pid, const struct sched_param *param);
int sched_getparam(pid_t pid, struct sched_param *param);
struct sched_param {
...
int sched_priority;
...
};
DESCRIPTION
sched_setparam() sets the scheduling parameters associated with the
scheduling policy for the process identified by pid. If pid is zero,
then the parameters of the current process are set. The interpretation
of the parameter param depends on the scheduling policy of the process
identified by pid. See sched_setscheduler(2) for a description of the
scheduling policies supported under Linux.
sched_getparam() retrieves the scheduling parameters for the process
identified by pid. If pid is zero, then the parameters of the current
process are retrieved.
sched_setparam() checks the validity of param for the scheduling policy
of the process. The parameter param->sched_priority must lie within the
range given by sched_get_priority_min(2) and sched_get_priority_max(2).
For a discussion of the privileges and resource limits related to
scheduling priority and policy, see sched_setscheduler(2).
POSIX systems on which sched_setparam() and sched_getparam() are avail-
able define _POSIX_PRIORITY_SCHEDULING in <unistd.h>.
RETURN VALUE
On success, sched_setparam() and sched_getparam() return 0. On error,
-1 is returned, and errno is set appropriately.
ERRORS
EINVAL The parameter param does not make sense for the current schedul-
ing policy.
EPERM The calling process does not have appropriate privileges (Linux:
does not have the CAP_SYS_NICE capability).
ESRCH The process whose ID is pid could not be found.
CONFORMING TO
POSIX.1b (formerly POSIX.4)
SEE ALSO
getpriority(2), nice(2), sched_get_priority_max(2), sched_get_prior
ity_min(2), sched_getaffinity(2), sched_getscheduler(2),
sched_setaffinity(2), sched_setscheduler(2), setpriority(2), capabili
ties(7)
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)
ISO/IEC 9945-1:1996
Linux 2.6.16 2006-03-23 SCHED_SETPARAM(2)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Tue Feb 13 02:17:37 GMT 2007
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