NAME
cpu_idle —
machine-dependent processor
idling interface
SYNOPSIS
#include <sys/cpu.h>
void
cpu_idle(
void);
DESCRIPTION
cpu_idle() is called by machine-independent code when the
processor has nothing to do. It can be used to conserve the processor power,
for example.
cpu_idle() returns immediately if
cpu_need_resched() has been called for the processor after
the last call of
cpu_idle() or
cpu_did_resched() on the processor.
cpu_idle() returns as soon as possible when
cpu_need_resched() is called for the processor. Otherwise,
it returns whenever it likes.
cpu_idle() is called at
IPL_NONE
,
without any locks held.
EXAMPLES
The simplest (and, in some cases, the best) implementation of
cpu_idle() is the following.
void
cpu_idle(void)
{
/* nothing */
}
SEE ALSO
cpu_need_resched(9),
cpu_switchto(9),
intro(9),
spl(9)