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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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sched_setparam(2) System Calls Manual sched_setparam(2)
sched_setparam, sched_getparam - set and get scheduling
parameters
Standard C library (libc, -lc)
#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 to indicate the error.
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.1-2008.
POSIX.1-2001.
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 the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.9.1 2024-05-02 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)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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