static void test_by_function_level(int fl, bool dirty)
{
rtems_interrupt_lock lock;
rtems_interrupt_lock_context lock_context;
int s;
uint64_t min;
uint64_t q1;
uint64_t q2;
uint64_t q3;
uint64_t max;
rtems_interrupt_lock_initialize(&lock, "test");
rtems_interrupt_lock_acquire(&lock, &lock_context);
for (s = 0; s < SAMPLES; ++s) {
call_at_level(fl, fl, s, dirty);
}
rtems_interrupt_lock_release(&lock, &lock_context);
rtems_interrupt_lock_destroy(&lock);
sort_t();
min = t[0];
q1 = t[(1 * SAMPLES) / 4];
q2 = t[SAMPLES / 2];
q3 = t[(3 * SAMPLES) / 4];
max = t[SAMPLES - 1];
printf(
" <Sample functionNestLevel=\"%i\">\n"
" <Min unit=\"ns\">%" PRIu64 "</Min>"
"<Q1 unit=\"ns\">%" PRIu64 "</Q1>"
"<Q2 unit=\"ns\">%" PRIu64 "</Q2>"
"<Q3 unit=\"ns\">%" PRIu64 "</Q3>"
"<Max unit=\"ns\">%" PRIu64 "</Max>\n"
" </Sample>\n",
fl,
rtems_counter_ticks_to_nanoseconds(min),
rtems_counter_ticks_to_nanoseconds(q1),
rtems_counter_ticks_to_nanoseconds(q2),
rtems_counter_ticks_to_nanoseconds(q3),
rtems_counter_ticks_to_nanoseconds(max)
);
}
static void test_converter(void)
{
CPU_Counter_ticks frequency = rtems_counter_nanoseconds_to_ticks(1000000000);
uint64_t ns = rtems_counter_ticks_to_nanoseconds(frequency);
printf("CPU counter frequency: %" PRIu32 "Hz\n", frequency);
printf("nanoseconds for frequency count ticks: %" PRIu64 "\n", ns);
rtems_test_assert(ns == 1000000000);
}
static uint64_t do_some_work(void)
{
rtems_counter_ticks a;
rtems_counter_ticks b;
rtems_counter_ticks d;
/* This gives 1024 nop instructions */
a = rtems_counter_read();
I512();
I512();
b = rtems_counter_read();
d = rtems_counter_difference(b, a);
return rtems_counter_ticks_to_nanoseconds(d);
}
static uint64_t large_delta_to_ns(rtems_counter_ticks d)
{
uint64_t ns;
ns = rtems_counter_ticks_to_nanoseconds(d);
/* Special case for CPU counters using the clock driver counter */
if (ns < rtems_configuration_get_nanoseconds_per_tick()) {
printf(
"warning: the RTEMS counter seems to be unable to\n"
" measure intervals greater than the clock tick interval\n"
);
ns += rtems_configuration_get_nanoseconds_per_tick();
}
return ns;
}
static uint64_t store(void)
{
rtems_counter_ticks a;
rtems_counter_ticks b;
rtems_counter_ticks d;
size_t i;
volatile int *vdata = &data[0];
a = rtems_counter_read();
for (i = 0; i < RTEMS_ARRAY_SIZE(data); ++i) {
vdata[i] = 0;
}
b = rtems_counter_read();
d = rtems_counter_difference(b, a);
return rtems_counter_ticks_to_nanoseconds(d);
}
static void report_overhead(
const char *name,
rtems_counter_ticks t1,
rtems_counter_ticks t0
)
{
rtems_counter_ticks d;
uint64_t ns;
d = rtems_counter_difference(t1, t0);
ns = rtems_counter_ticks_to_nanoseconds(d);
printf(
"overhead %s: %" PRIu64 " ticks, %" PRIu64 "ns\n",
name,
(uint64_t) d,
ns
);
}