CPU_IDLE(9) NetBSD Kernel Developer's Manual CPU_IDLE(9) 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 exam- ple. 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) NetBSD 6.0.1 April 20, 2007 NetBSD 6.0.1
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