Function timer_sanity_check

dpdk/app/test/test_timer.c:493–528

}

static int
timer_sanity_check(void)
{
#ifdef RTE_LIBEAL_USE_HPET
	if (eal_timer_source != EAL_TIMER_HPET) {
		printf("Not using HPET, can't sanity check timer sources\n");
		return 0;
	}

	const uint64_t t_hz = rte_get_tsc_hz();
	const uint64_t h_hz = rte_get_hpet_hz();
	printf("Hertz values: TSC = %"PRIu64", HPET = %"PRIu64"\n", t_hz, h_hz);

	const uint64_t tsc_start = rte_get_tsc_cycles();
	const uint64_t hpet_start = rte_get_hpet_cycles();
	rte_delay_ms(100); /* delay 1/10 second */
	const uint64_t tsc_end = rte_get_tsc_cycles();
	const uint64_t hpet_end = rte_get_hpet_cycles();
	printf("Measured cycles: TSC = %"PRIu64", HPET = %"PRIu64"\n",
			tsc_end-tsc_start, hpet_end-hpet_start);

	const double tsc_time = (double)(tsc_end - tsc_start)/t_hz;
	const double hpet_time = (double)(hpet_end - hpet_start)/h_hz;
	/* get the percentage that the times differ by */
	const double time_diff = fabs(tsc_time - hpet_time)*100/tsc_time;
	printf("Measured time: TSC = %.4f, HPET = %.4f\n", tsc_time, hpet_time);

	printf("Elapsed time measured by TSC and HPET differ by %f%%\n",
			time_diff);
	if (time_diff > 0.1) {
		printf("Error times differ by >0.1%%");
		return -1;
	}
#endif
	return 0;
}

static int
test_timer(void)