ロードアベレージはどこで計算されるのか？

/*
 * Compute a tenex style load average of a quantity on
 * 1, 5 and 15 minute intervals.
 * XXXKSE   Needs complete rewrite when correct info is available.
 * Completely Bogus.. only works with 1:1 (but compiles ok now :-)
 */
static void
loadav(void *arg)
{
	int i, nrun;
	struct loadavg *avg;

	nrun = sched_load();
	avg = &averunnable;

	for (i = 0; i < 3; i++)
		avg->ldavg[i] = (cexp[i] * avg->ldavg[i] +
		    nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT;

	/*
	 * Schedule the next update to occur after 5 seconds, but add a
	 * random variation to avoid synchronisation with processes that
	 * run at regular intervals.
	 */
	callout_reset(&loadav_callout, hz * 4 + (int)(random() % (hz * 2 + 1)),
	    loadav, NULL);
}