Function comp_smp_tsc

freebsd/x86/x86/tsc.c:433–453

#define	N	1000

static void
comp_smp_tsc(void *arg)
{
	uint64_t *tsc;
	int64_t d1, d2;
	u_int cpu = PCPU_GET(cpuid);
	u_int i, j, size;

	size = (mp_maxid + 1) * 3;
	for (i = 0, tsc = arg; i < N; i++, tsc += size)
		CPU_FOREACH(j) {
			if (j == cpu)
				continue;
			d1 = tsc[cpu * 3 + 1] - tsc[j * 3];
			d2 = tsc[cpu * 3 + 2] - tsc[j * 3 + 1];
			if (d1 <= 0 || d2 <= 0) {
				smp_tsc = 0;
				return;
			}
		}
}

static void
adj_smp_tsc(void *arg)