diff options
Diffstat (limited to 'tests/codel/codel_test.c')
-rw-r--r-- | tests/codel/codel_test.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/tests/codel/codel_test.c b/tests/codel/codel_test.c new file mode 100644 index 00000000..91bad13e --- /dev/null +++ b/tests/codel/codel_test.c @@ -0,0 +1,147 @@ +/* Test routines for the CoDel implementation + * + * (C) 2015 by sysmocom s.f.m.c. GmbH + * Author: Jacob Erlbeck <jerlbeck@sysmocom.de> + */ + +#undef _GNU_SOURCE +#define _GNU_SOURCE + +#if 0 +#include <osmocom/core/talloc.h> +#include <osmocom/core/prim.h> +#endif +#include <osmocom/core/application.h> +#include <osmocom/core/utils.h> +#include <osmocom/core/logging.h> + +#include "gprs_codel.h" + +#include <stdio.h> +#include <stdlib.h> +#include <sys/time.h> + +static int do_codel_control(struct gprs_codel *state, const struct timeval *recv, + struct timeval *now, const struct timeval *delta_now, int count) +{ + int drop; + + drop = gprs_codel_control(state, recv, now, -1); + if (drop) { + printf("Dropping packet %d, " + "recv = %d.%03d, now = %d.%03d, " + "codel.count = %d\n", + count, + (int)recv->tv_sec, (int)recv->tv_usec/1000, + (int)now->tv_sec, (int)now->tv_usec/1000, + state->count); + } else { + timeradd(now, delta_now, now); + } + + return drop == 0 ? 0 : 1; +} + +static void test_codel(void) +{ + struct gprs_codel codel; + struct timeval now; + struct timeval recv; + const struct timeval delta_now = {0, 10000}; + const struct timeval init_delta_recv = {0, 5000}; + struct timeval delta_recv; + unsigned count; + unsigned sum = 0; + unsigned dropped = 0; + int drop; + + printf("----- %s START\n", __func__); + gprs_codel_init(&codel); + gprs_codel_set_interval(&codel, 100); + + timerclear(&now); + timerclear(&recv); + delta_recv = init_delta_recv; + + for (count = 0; count < 20; count++, sum++) { + drop = do_codel_control(&codel, &recv, &now, &delta_now, sum); + timeradd(&recv, &delta_recv, &recv); + dropped += drop; + } + + printf("Dropped %d packets\n", dropped); + OSMO_ASSERT(dropped == 0); + OSMO_ASSERT(!codel.dropping); + + for (count = 0; count < 20; count++, sum++) { + drop = do_codel_control(&codel, &recv, &now, &delta_now, sum); + timeradd(&recv, &delta_recv, &recv); + dropped += drop; + } + + OSMO_ASSERT(dropped == 2); + OSMO_ASSERT(codel.dropping); + + /* slow down recv rate */ + delta_recv.tv_usec = delta_now.tv_usec; + + for (count = 0; count < 75; count++, sum++) { + drop = do_codel_control(&codel, &recv, &now, &delta_now, sum); + timeradd(&recv, &delta_recv, &recv); + dropped += drop; + } + + OSMO_ASSERT(dropped == 20); + OSMO_ASSERT(codel.dropping); + + for (count = 0; count < 50; count++, sum++) { + drop = do_codel_control(&codel, &recv, &now, &delta_now, sum); + timeradd(&recv, &delta_recv, &recv); + dropped += drop; + } + + OSMO_ASSERT(dropped == 20); + OSMO_ASSERT(!codel.dropping); + OSMO_ASSERT(codel.count >= 20); + + /* go back to old data rate */ + delta_recv = init_delta_recv; + + for (count = 0; count < 20; count++, sum++) { + drop = do_codel_control(&codel, &recv, &now, &delta_now, sum); + timeradd(&recv, &delta_recv, &recv); + dropped += drop; + } + + OSMO_ASSERT(dropped == 20); + OSMO_ASSERT(!codel.dropping); + + for (count = 0; count < 20; count++, sum++) { + drop = do_codel_control(&codel, &recv, &now, &delta_now, sum); + timeradd(&recv, &delta_recv, &recv); + dropped += drop; + } + + OSMO_ASSERT(dropped == 22); + OSMO_ASSERT(codel.count >= 2); + + printf("Dropped %d packets\n", dropped); + + printf("----- %s END\n", __func__); +} + +static struct log_info info = {}; + +int main(int argc, char **argv) +{ + osmo_init_logging(&info); + log_set_use_color(osmo_stderr_target, 0); + log_set_print_filename(osmo_stderr_target, 0); + log_set_log_level(osmo_stderr_target, LOGL_INFO); + + printf("===== CoDel test START\n"); + test_codel(); + printf("===== CoDel test END\n\n"); + + exit(EXIT_SUCCESS); +} |