.\" 1996-04-10 Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de>
.\" revision
.\"
-.TH SCHED_YIELD 2 2008-10-18 "Linux" "Linux Programmer's Manual"
+.TH SCHED_YIELD 2 2017-09-15 "Linux" "Linux Programmer's Manual"
.SH NAME
sched_yield \- yield the processor
.SH SYNOPSIS
.B #include <sched.h>
-.sp
+.PP
.B int sched_yield(void);
.SH DESCRIPTION
.BR sched_yield ()
.BR sched_yield ()
always succeeds.
.SH CONFORMING TO
-POSIX.1-2001.
+POSIX.1-2001, POSIX.1-2008.
.SH NOTES
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
.BR sched_yield ().
-
+.PP
POSIX systems on which
.BR sched_yield ()
is available define
.B _POSIX_PRIORITY_SCHEDULING
in
.IR <unistd.h> .
-
+.PP
Strategic calls to
.BR sched_yield ()
can improve performance by giving other threads or processes
schedulable threads are still held by the caller),
since doing so will result in unnecessary context switches,
which will degrade system performance.
-.SH SEE ALSO
-.BR sched_setscheduler (2)
-for a description of Linux scheduling
.PP
-.I Programming for the real world \- POSIX.4
-by Bill O. Gallmeister, O'Reilly & Associates, Inc., ISBN 1-56592-074-0.
+.BR sched_yield ()
+is intended for use with real-time scheduling policies (i.e.,
+.BR SCHED_FIFO
+or
+.BR SCHED_RR ).
+Use of
+.BR sched_yield ()
+with nondeterministic scheduling policies such as
+.BR SCHED_OTHER
+is unspecified and very likely means your application design is broken.
+.SH SEE ALSO
+.BR sched (7)
+.SH COLOPHON
+This page is part of release 5.10 of the Linux
+.I 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/.