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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | CAVEATS | SEE ALSO | COLOPHON |
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sched_yield(2) System Calls Manual sched_yield(2)
sched_yield - yield the processor
Standard C library (libc, -lc)
#include <sched.h>
int sched_yield(void);
sched_yield() causes the calling thread to relinquish the CPU.
The thread is moved to the end of the queue for its static
priority and a new thread gets to run.
On success, sched_yield() returns 0. On error, -1 is returned,
and errno is set to indicate the error.
In the Linux implementation, sched_yield() always succeeds.
POSIX.1-2008.
POSIX.1-2001 (but optional). POSIX.1-2008.
Before POSIX.1-2008, systems on which sched_yield() is available
defined _POSIX_PRIORITY_SCHEDULING in <unistd.h>.
sched_yield() is intended for use with real-time scheduling
policies (i.e., SCHED_FIFO or SCHED_RR). Use of sched_yield()
with nondeterministic scheduling policies such as SCHED_OTHER is
unspecified and very likely means your application design is
broken.
If the calling thread is the only thread in the highest priority
list at that time, it will continue to run after a call to
sched_yield().
Avoid calling sched_yield() unnecessarily or inappropriately
(e.g., when resources needed by other schedulable threads are
still held by the caller), since doing so will result in
unnecessary context switches, which will degrade system
performance.
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-6.10.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-02-02. 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 6.10 2024-07-23 sched_yield(2)
Pages that refer to this page: getrlimit(2), sched_setattr(2), sched_setscheduler(2), syscalls(2), pthread_yield(3), sched(7)
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HTML rendering created 2025-02-02 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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