Function bs_sample_time

src/lib/hardwaremain.c:219–248

* Typically a state will take 4 time samples: * 1. Before state entry callbacks * 2. After state entry callbacks / Before state function. * 3. After state function / Before state exit callbacks. * 4. After state exit callbacks. */

 *   4. After state exit callbacks.
 */
static void bs_sample_time(struct boot_state *state)
{
	static const char *const sample_id[] = { "entry", "run", "exit" };
	static struct mono_time previous_sample;
	struct mono_time this_sample;
	long console;

	if (!CONFIG(HAVE_MONOTONIC_TIMER))
		return;

	console = console_time_get_and_reset();
	timer_monotonic_get(&this_sample);
	state->num_samples++;

	int i = state->num_samples - 2;
	if ((i >= 0) && (i < ARRAY_SIZE(sample_id))) {
		long execution = mono_time_diff_microseconds(&previous_sample, &this_sample);

		/* Report with millisecond precision to reduce log diffs. */
		execution = DIV_ROUND_CLOSEST(execution, USECS_PER_MSEC);
		console = DIV_ROUND_CLOSEST(console, USECS_PER_MSEC);
		if (execution) {
			printk(BIOS_DEBUG, "BS: %s %s times (exec / console): %ld / %ld ms\n",
				state->name, sample_id[i], execution - console, console);
			/* Reset again to ignore printk() time above. */
			console_time_get_and_reset();
		}
	}
	timer_monotonic_get(&previous_sample);
}

#if CONFIG(TIMER_QUEUE)
static void bs_run_timers(int drain)