From b55ff05eb868a3e9ffb241d36d198969067dc2e0 Mon Sep 17 00:00:00 2001 From: Neels Hofmeyr Date: Tue, 13 Jul 2021 23:03:07 +0200 Subject: 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 --- tests/handover/handover_test.c | 56 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'tests') diff --git a/tests/handover/handover_test.c b/tests/handover/handover_test.c index 60a31be2f..331726af2 100644 --- a/tests/handover/handover_test.c +++ b/tests/handover/handover_test.c @@ -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); -- cgit v1.2.3