149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/* Test routines for the CoDel implementation
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*
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* (C) 2015 by sysmocom s.f.m.c. GmbH
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* Author: Jacob Erlbeck <jerlbeck@sysmocom.de>
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*/
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#undef _GNU_SOURCE
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#define _GNU_SOURCE
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#if 0
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/prim.h>
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#endif
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#include <osmocom/core/application.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/timer_compat.h>
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#include <osmocom/core/logging.h>
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#include "gprs_codel.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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static int do_codel_control(struct gprs_codel *state, const struct timespec *recv,
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struct timespec *now, const struct timespec *delta_now, int count)
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{
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int drop;
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drop = gprs_codel_control(state, recv, now, -1);
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if (drop) {
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printf("Dropping packet %d, "
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"recv = %d.%03d, now = %d.%03d, "
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"codel.count = %d\n",
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count,
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(int)recv->tv_sec, (int)recv->tv_nsec/1000000,
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(int)now->tv_sec, (int)now->tv_nsec/1000000,
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state->count);
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} else {
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timespecadd(now, delta_now, now);
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}
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return drop == 0 ? 0 : 1;
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}
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static void test_codel(void)
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{
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struct gprs_codel codel;
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struct timespec now;
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struct timespec recv;
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const struct timespec delta_now = {0, 10000000};
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const struct timespec init_delta_recv = {0, 5000000};
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struct timespec delta_recv;
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unsigned count;
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unsigned sum = 0;
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unsigned dropped = 0;
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int drop;
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printf("----- %s START\n", __func__);
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gprs_codel_init(&codel);
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gprs_codel_set_interval(&codel, 100);
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timespecclear(&now);
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timespecclear(&recv);
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delta_recv = init_delta_recv;
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for (count = 0; count < 20; count++, sum++) {
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drop = do_codel_control(&codel, &recv, &now, &delta_now, sum);
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timespecadd(&recv, &delta_recv, &recv);
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dropped += drop;
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}
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printf("Dropped %d packets\n", dropped);
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OSMO_ASSERT(dropped == 0);
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OSMO_ASSERT(!codel.dropping);
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for (count = 0; count < 20; count++, sum++) {
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drop = do_codel_control(&codel, &recv, &now, &delta_now, sum);
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timespecadd(&recv, &delta_recv, &recv);
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dropped += drop;
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}
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OSMO_ASSERT(dropped == 2);
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OSMO_ASSERT(codel.dropping);
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/* slow down recv rate */
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delta_recv.tv_nsec = delta_now.tv_nsec;
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for (count = 0; count < 75; count++, sum++) {
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drop = do_codel_control(&codel, &recv, &now, &delta_now, sum);
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timespecadd(&recv, &delta_recv, &recv);
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dropped += drop;
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}
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OSMO_ASSERT(dropped == 20);
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OSMO_ASSERT(codel.dropping);
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for (count = 0; count < 50; count++, sum++) {
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drop = do_codel_control(&codel, &recv, &now, &delta_now, sum);
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timespecadd(&recv, &delta_recv, &recv);
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dropped += drop;
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}
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OSMO_ASSERT(dropped == 20);
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OSMO_ASSERT(!codel.dropping);
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OSMO_ASSERT(codel.count >= 20);
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/* go back to old data rate */
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delta_recv = init_delta_recv;
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for (count = 0; count < 20; count++, sum++) {
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drop = do_codel_control(&codel, &recv, &now, &delta_now, sum);
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timespecadd(&recv, &delta_recv, &recv);
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dropped += drop;
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}
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OSMO_ASSERT(dropped == 20);
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OSMO_ASSERT(!codel.dropping);
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for (count = 0; count < 20; count++, sum++) {
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drop = do_codel_control(&codel, &recv, &now, &delta_now, sum);
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timespecadd(&recv, &delta_recv, &recv);
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dropped += drop;
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}
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OSMO_ASSERT(dropped == 22);
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OSMO_ASSERT(codel.count >= 2);
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printf("Dropped %d packets\n", dropped);
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printf("----- %s END\n", __func__);
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}
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static struct log_info info = {};
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int main(int argc, char **argv)
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{
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osmo_init_logging2(NULL, &info);
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log_set_use_color(osmo_stderr_target, 0);
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log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE);
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log_set_log_level(osmo_stderr_target, LOGL_INFO);
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printf("===== CoDel test START\n");
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test_codel();
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printf("===== CoDel test END\n\n");
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exit(EXIT_SUCCESS);
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}
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