CPU_IDLE(9) Kernel Developer's Manual CPU_IDLE(9)
NAME
cpu_idlemachine-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