NAME

cpu_idle - machine-dependent processor idling interface

SYNOPSIS



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)