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Diffstat (limited to '')
| -rw-r--r-- | test/unit/hwclock.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/test/unit/hwclock.c b/test/unit/hwclock.c new file mode 100644 index 0000000..79c0879 --- /dev/null +++ b/test/unit/hwclock.c @@ -0,0 +1,117 @@ +/* + ********************************************************************** + * Copyright (C) Miroslav Lichvar 2016-2018, 2022 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + */ + +#include <config.h> +#include "test.h" + +#if defined(FEAT_PHC) || defined(HAVE_LINUX_TIMESTAMPING) + +#include <hwclock.c> + +#define MAX_READINGS 20 + +void +test_unit(void) +{ + struct timespec start_hw_ts, start_local_ts, hw_ts, local_ts, ts; + struct timespec readings[MAX_READINGS][3]; + HCL_Instance clock; + double freq, jitter, interval, dj, err, sum; + int i, j, k, l, new_sample, n_readings, count; + + LCL_Initialise(); + TST_RegisterDummyDrivers(); + + for (i = 1; i <= 8; i++) { + clock = HCL_CreateInstance(random() % (1 << i), 1 << i, 1.0, 1e-9); + + for (j = 0, count = 0, sum = 0.0; j < 100; j++) { + UTI_ZeroTimespec(&start_hw_ts); + UTI_ZeroTimespec(&start_local_ts); + UTI_AddDoubleToTimespec(&start_hw_ts, TST_GetRandomDouble(0.0, 1e9), &start_hw_ts); + UTI_AddDoubleToTimespec(&start_local_ts, TST_GetRandomDouble(0.0, 1e9), &start_local_ts); + + DEBUG_LOG("iteration %d", j); + + freq = TST_GetRandomDouble(0.9, 1.1); + jitter = TST_GetRandomDouble(10.0e-9, 1000.0e-9); + interval = TST_GetRandomDouble(0.1, 10.0); + + clock->n_samples = 0; + clock->valid_coefs = 0; + QNT_Reset(clock->delay_quants); + + new_sample = 0; + + for (k = 0; k < 100; k++) { + UTI_AddDoubleToTimespec(&start_hw_ts, k * interval * freq, &hw_ts); + UTI_AddDoubleToTimespec(&start_local_ts, k * interval, &local_ts); + if (HCL_CookTime(clock, &hw_ts, &ts, NULL) && new_sample) { + dj = fabs(UTI_DiffTimespecsToDouble(&ts, &local_ts) / jitter); + DEBUG_LOG("delta/jitter %f", dj); + if (clock->n_samples >= clock->max_samples / 2) + sum += dj, count++; + TEST_CHECK(clock->n_samples < 4 || dj <= 4.0); + TEST_CHECK(clock->n_samples < 8 || dj <= 3.0); + } + + UTI_AddDoubleToTimespec(&start_hw_ts, k * interval * freq + TST_GetRandomDouble(-jitter, jitter), &hw_ts); + + if (HCL_NeedsNewSample(clock, &local_ts)) { + n_readings = random() % MAX_READINGS + 1; + for (l = 0; l < n_readings; l++) { + UTI_AddDoubleToTimespec(&local_ts, -TST_GetRandomDouble(0.0, jitter / 10.0), &readings[l][0]); + readings[l][1] = hw_ts; + UTI_AddDoubleToTimespec(&local_ts, TST_GetRandomDouble(0.0, jitter / 10.0), &readings[l][2]); + } + + UTI_ZeroTimespec(&hw_ts); + UTI_ZeroTimespec(&local_ts); + if (HCL_ProcessReadings(clock, n_readings, readings, &hw_ts, &local_ts, &err)) { + HCL_AccumulateSample(clock, &hw_ts, &local_ts, 2.0 * jitter); + new_sample = 1; + } else { + new_sample = 0; + } + } + + TEST_CHECK(clock->valid_coefs == (clock->n_samples >= 2)); + + if (!clock->valid_coefs) + continue; + + TEST_CHECK(fabs(clock->offset) <= 2.0 * jitter); + } + } + + TEST_CHECK(sum / count < 2.4 / sqrt(clock->max_samples)); + + HCL_DestroyInstance(clock); + } + + LCL_Finalise(); +} +#else +void +test_unit(void) +{ + TEST_REQUIRE(0); +} +#endif |