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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | SEE ALSO | COLOPHON |
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SCHED_SETPARAM(2) Linux Programmer's Manual SCHED_SETPARAM(2)
sched_setparam, sched_getparam - set and get scheduling
parameters
#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;
...
};
sched_setparam() sets the scheduling parameters associated with
the scheduling policy for the thread whose thread ID is specified
in pid. If pid is zero, then the parameters of the calling
thread are set. The interpretation of the argument param depends
on the scheduling policy of the thread identified by pid. See
sched(7) for a description of the scheduling policies supported
under Linux.
sched_getparam() retrieves the scheduling parameters for the
thread identified by pid. If pid is zero, then the parameters of
the calling thread are retrieved.
sched_setparam() checks the validity of param for the scheduling
policy of the thread. The value 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(7).
POSIX systems on which sched_setparam() and sched_getparam() are
available define _POSIX_PRIORITY_SCHEDULING in <unistd.h>.
On success, sched_setparam() and sched_getparam() return 0. On
error, -1 is returned, and errno is set appropriately.
EINVAL Invalid arguments: param is NULL or pid is negative
EINVAL (sched_setparam()) The argument param does not make sense
for the current scheduling policy.
EPERM (sched_setparam()) The caller does not have appropriate
privileges (Linux: does not have the CAP_SYS_NICE
capability).
ESRCH The thread whose ID is pid could not be found.
POSIX.1-2001, POSIX.1-2008.
getpriority(2), gettid(2), nice(2), sched_get_priority_max(2),
sched_get_priority_min(2), sched_getaffinity(2),
sched_getscheduler(2), sched_setaffinity(2), sched_setattr(2),
sched_setscheduler(2), setpriority(2), capabilities(7), sched(7)
This page is part of release 5.10 of the Linux man-pages project.
A description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2019-10-10 SCHED_SETPARAM(2)
Pages that refer to this page: getrlimit(2), gettid(2), sched_get_priority_max(2), sched_setattr(2), sched_setscheduler(2), syscalls(2), posix_spawn(3), capabilities(7), credentials(7), sched(7)
Copyright and license for this manual page
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