Linux cli command sched_yield

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command sched_yield and provides detailed information about the command sched_yield, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the sched_yield.

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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)

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