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handover_test: add fake-time 'wait' 

Add a 'wait' cmd that lets (fake) time pass.

An ucoming patch will show the
first use of this: "test_penalty_timer.ho_vty: show lchan recovery"
I8f7668b6d08a0dac9e90d2358955f9d5099d39fa

My actual original reason to add this follows in patches
- "handover tests: test passing of penalty timeout"
  I65e59cc7309778cf9d71612669ce84d101c8135e
- "hodec2: add low-rxqual-assignment penalty timer (2/2)"
  Id00a07313fe04eec509b336c0637b59c707760e0

Related: SYS#5198
Change-Id: Ia6b5696adef7e7bf649473b4d79b96acf3aa59e3
This commit is contained in:
Neels Hofmeyr 2021-07-13 23:03:07 +02:00 committed by neels
parent 70d08b00ab
commit b55ff05eb8
1 changed files with 56 additions and 0 deletions
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56
tests/handover/handover_test.c
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@ -94,6 +94,41 @@ struct neighbor_meas {
uint8_t bcch_f;
};
const struct timeval fake_time_start_time = { 123, 456 };
void fake_time_passes(time_t secs, suseconds_t usecs)
{
struct timeval diff;
/* Add time to osmo_fsm timers, using osmo_gettimeofday() */
osmo_gettimeofday_override_add(secs, usecs);
/* Add time to penalty timers, using osmo_clock_gettime() */
osmo_clock_override_add(CLOCK_MONOTONIC, secs, usecs * 1000);
timersub(&osmo_gettimeofday_override_time, &fake_time_start_time, &diff);
fprintf(stderr, "Total time passed: %d.%06d s\n", (int)diff.tv_sec, (int)diff.tv_usec);
osmo_timers_prepare();
osmo_timers_update();
}
void fake_time_start()
{
struct timespec *clock_override;
/* osmo_fsm uses osmo_gettimeofday(). To affect FSM timeouts, we need osmo_gettimeofday_override. */
osmo_gettimeofday_override_time = fake_time_start_time;
osmo_gettimeofday_override = true;
/* Penalty timers use osmo_clock_gettime(CLOCK_MONOTONIC). To affect these timeouts, we need
* osmo_gettimeofday_override. */
clock_override = osmo_clock_override_gettimespec(CLOCK_MONOTONIC);
OSMO_ASSERT(clock_override);
clock_override->tv_sec = fake_time_start_time.tv_sec;
clock_override->tv_nsec = fake_time_start_time.tv_usec * 1000;
osmo_clock_override_enable(CLOCK_MONOTONIC, true);
fake_time_passes(0, 0);
}
static void gen_meas_rep(struct gsm_lchan *lchan,
uint8_t bs_power_db, uint8_t rxlev, uint8_t rxqual, uint8_t ta,
int neighbors_count, struct neighbor_meas *neighbors)
@ -1410,6 +1445,22 @@ DEFUN(set_ts_use, set_ts_use_cmd,
return CMD_SUCCESS;
}
DEFUN(wait, wait_cmd,
"wait <0-999999> [<0-999>]",
"Let some fake time pass. The test continues instantaneously, but this overrides osmo_gettimeofday() to let"
" given amount of time pass virtually.\n"
"Seconds to fake-wait\n"
"Microseconds to fake-wait, in addition to the seconds waited\n")
{
time_t seconds = atoi(argv[0]);
suseconds_t useconds = 0;
VTY_ECHO();
if (argc > 1)
useconds = atoi(argv[1]) * 1000;
fake_time_passes(seconds, useconds);
return CMD_SUCCESS;
}
static void ho_test_vty_init()
{
install_element(CONFIG_NODE, &create_n_bts_cmd);
@ -1433,6 +1484,7 @@ static void ho_test_vty_init()
install_element(CONFIG_NODE, &codec_f_cmd);
install_element(CONFIG_NODE, &codec_h_cmd);
install_element(CONFIG_NODE, &set_ts_use_cmd);
install_element(CONFIG_NODE, &wait_cmd);
}
static const struct log_info_cat log_categories[] = {
@ -1554,6 +1606,10 @@ int main(int argc, char **argv)
log_set_print_timestamp(osmo_stderr_target, 0);
osmo_fsm_log_addr(false);
/* the 'wait' command above, intended to test penalty timers, adds seconds to the monotonic clock in "fake
* time". */
fake_time_start();
bsc_network_alloc();
if (!bsc_gsmnet)
exit(1);