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newlib: Fix UT - test time adjustment happens linearly

This commit is contained in:
KonstantinKondrashov 2019-10-01 03:05:03 +08:00
parent c286416762
commit 5ba3b8c587
1 changed files with 6 additions and 20 deletions
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26
components/newlib/test/test_time.c
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@ -234,19 +234,6 @@ static void start_measure(int64_t* sys_time, int64_t* real_time)
*sys_time = (int64_t)tv_time.tv_sec * 1000000L + tv_time.tv_usec;
}
static void end_measure(int64_t* sys_time, int64_t* real_time)
{
struct timeval tv_time;
int64_t t1, t2;
do {
t1 = esp_timer_get_time();
gettimeofday(&tv_time, NULL);
t2 = esp_timer_get_time();
} while (t2 - t1 > 40);
*real_time = t2;
*sys_time = (int64_t)tv_time.tv_sec * 1000000L + tv_time.tv_usec;
}
static int64_t calc_correction(const char* tag, int64_t* sys_time, int64_t* real_time)
{
int64_t dt_real_time_us = real_time[1] - real_time[0];
@ -275,23 +262,22 @@ static void measure_time_task(void *pvParameters)
start_measure(&main_sys_time_us[0], &main_real_time_us[0]);
{
int64_t real_time_us[2];
int64_t sys_time_us[2];
int64_t delay_us = 2 * 1000000; // 2 sec
start_measure(&sys_time_us[0], &real_time_us[0]);
int64_t real_time_us[2] = { main_real_time_us[0], 0};
int64_t sys_time_us[2] = { main_sys_time_us[0], 0};
// although exit flag is set in another task, checking (exit_flag == false) is safe
while (exit_flag == false) {
ets_delay_us(delay_us);
ets_delay_us(2 * 1000000); // 2 sec
end_measure(&sys_time_us[1], &real_time_us[1]);
start_measure(&sys_time_us[1], &real_time_us[1]);
result_adjtime_correction_us[1] += calc_correction("measure", sys_time_us, real_time_us);
sys_time_us[0] = sys_time_us[1];
real_time_us[0] = real_time_us[1];
}
main_sys_time_us[1] = sys_time_us[1];
main_real_time_us[1] = real_time_us[1];
}
end_measure(&main_sys_time_us[1], &main_real_time_us[1]);
result_adjtime_correction_us[0] = calc_correction("main", main_sys_time_us, main_real_time_us);
int64_t delta_us = result_adjtime_correction_us[0] - result_adjtime_correction_us[1];
printf("\nresult of adjtime correction: %lli us, %lli us. delta = %lli us\n", result_adjtime_correction_us[0], result_adjtime_correction_us[1], delta_us);