Function getnextcpuevent

freebsd/kern/kern_clocksource.c:231–262

* Schedule binuptime of the next event on current CPU. */

 * Schedule binuptime of the next event on current CPU.
 */
static sbintime_t
getnextcpuevent(int idle)
{
	sbintime_t event;
	struct pcpu_state *state;
	u_int hardfreq;

	state = DPCPU_PTR(timerstate);
	/* Handle hardclock() events, skipping some if CPU is idle. */
	event = state->nexthard;
	if (idle) {
		hardfreq = (u_int)hz / 2;
		if (tc_min_ticktock_freq > 2
#ifdef SMP
		    && curcpu == CPU_FIRST()
#endif
		    )
			hardfreq = hz / tc_min_ticktock_freq;
		if (hardfreq > 1)
			event += tick_sbt * (hardfreq - 1);
	}
	/* Handle callout events. */
	if (event > state->nextcall)
		event = state->nextcall;
	if (!idle) { /* If CPU is active - handle other types of events. */
		if (event > state->nextstat)
			event = state->nextstat;
		if (profiling && event > state->nextprof)
			event = state->nextprof;
	}
	return (event);
}

/*
 * Schedule binuptime of the next event on all CPUs.