NAME

       sched_yield - yield the processor

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <sched.h>

       int sched_yield(void);

DESCRIPTION

       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.

RETURN VALUE

       On success, sched_yield() returns 0.  On error, -1 is returned, and errno is set to indicate the error.

ERRORS

       In the Linux implementation, sched_yield() always succeeds.

STANDARDS

       POSIX.1-2008.

HISTORY

       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>.

CAVEATS

       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.

SEE ALSO

       sched(7)

Linux man-pages 6.7                                2023-10-31                                     sched_yield(2)