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- /*
- This file is part of GNUnet.
- Copyright (C) 2010-2013 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet 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
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file ats-tests/ats-testing-preferences.c
- * @brief ats benchmark: preference generator
- * @author Christian Grothoff
- * @author Matthias Wachs
- */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- #include "ats-testing.h"
- static struct PreferenceGenerator *pg_head;
- static struct PreferenceGenerator *pg_tail;
- extern struct GNUNET_ATS_TEST_Topology *top;
- static double
- get_preference(struct PreferenceGenerator *pg)
- {
- struct GNUNET_TIME_Relative time_delta;
- double delta_value;
- double pref_value;
- /* Calculate the current preference value */
- switch (pg->type)
- {
- case GNUNET_ATS_TEST_TG_CONSTANT:
- pref_value = pg->base_value;
- break;
- case GNUNET_ATS_TEST_TG_LINEAR:
- time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
- /* Calculate point of time in the current period */
- time_delta.rel_value_us = time_delta.rel_value_us %
- pg->duration_period.rel_value_us;
- delta_value = ((double)time_delta.rel_value_us /
- pg->duration_period.rel_value_us) * (pg->max_value - pg->base_value);
- if ((pg->max_value < pg->base_value) &&
- ((pg->max_value - pg->base_value) > pg->base_value))
- {
- /* This will cause an underflow */
- GNUNET_break(0);
- }
- pref_value = pg->base_value + delta_value;
- break;
- case GNUNET_ATS_TEST_TG_RANDOM:
- delta_value = (double)GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK,
- 10000 * (pg->max_value - pg->base_value)) / 10000;
- pref_value = pg->base_value + delta_value;
- break;
- case GNUNET_ATS_TEST_TG_SINUS:
- time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
- /* Calculate point of time in the current period */
- time_delta.rel_value_us = time_delta.rel_value_us %
- pg->duration_period.rel_value_us;
- if ((pg->max_value - pg->base_value) > pg->base_value)
- {
- /* This will cause an underflow for second half of sinus period,
- * will be detected in general when experiments are loaded */
- GNUNET_break(0);
- }
- delta_value = (pg->max_value - pg->base_value) *
- sin((2 * M_PI) / ((double)pg->duration_period.rel_value_us) *
- time_delta.rel_value_us);
- pref_value = pg->base_value + delta_value;
- break;
- default:
- pref_value = 0.0;
- break;
- }
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Current preference value is %f\n",
- pref_value);
- return pref_value;
- }
- static void
- set_pref_task(void *cls)
- {
- struct BenchmarkPartner *p = cls;
- double pref_value;
- p->pg->set_task = NULL;
- pref_value = get_preference(p->pg);
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "Setting preference for master [%u] and slave [%u] for %s to %f\n",
- p->me->no, p->dest->no,
- GNUNET_ATS_print_preference_type(p->pg->kind), pref_value);
- GNUNET_ATS_performance_change_preference(p->me->ats_perf_handle,
- &p->dest->id,
- p->pg->kind,
- pref_value,
- GNUNET_ATS_PREFERENCE_END);
- switch (p->pg->kind)
- {
- case GNUNET_ATS_PREFERENCE_BANDWIDTH:
- p->pref_bandwidth = pref_value;
- break;
- case GNUNET_ATS_PREFERENCE_LATENCY:
- p->pref_delay = pref_value;
- break;
- default:
- break;
- }
- p->pg->set_task = GNUNET_SCHEDULER_add_delayed(p->pg->frequency,
- set_pref_task, p);
- }
- /**
- * Generate between the source master and the partner and set preferences with a
- * value depending on the generator.
- *
- * @param src source
- * @param dest partner
- * @param type type of preferences to generate
- * @param base_value traffic base rate to send data with
- * @param value_rate traffic maximum rate to send data with
- * @param period duration of a period of preferences generation (~ 1/frequency)
- * @param frequency how long to generate preferences
- * @param kind ATS preference to generate
- * @return the preference generator
- */
- struct PreferenceGenerator *
- GNUNET_ATS_TEST_generate_preferences_start(struct BenchmarkPeer *src,
- struct BenchmarkPartner *dest,
- enum GeneratorType type,
- unsigned int base_value,
- unsigned int value_rate,
- struct GNUNET_TIME_Relative period,
- struct GNUNET_TIME_Relative frequency,
- enum GNUNET_ATS_PreferenceKind kind)
- {
- struct PreferenceGenerator *pg;
- if (NULL != dest->pg)
- {
- GNUNET_break(0);
- return NULL;
- }
- pg = GNUNET_new(struct PreferenceGenerator);
- GNUNET_CONTAINER_DLL_insert(pg_head, pg_tail, pg);
- pg->type = type;
- pg->src = src;
- pg->dest = dest;
- pg->kind = kind;
- pg->base_value = base_value;
- pg->max_value = value_rate;
- pg->duration_period = period;
- pg->frequency = frequency;
- pg->time_start = GNUNET_TIME_absolute_get();
- switch (type)
- {
- case GNUNET_ATS_TEST_TG_CONSTANT:
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "Setting up constant preference generator master[%u] `%s' and slave [%u] `%s' max %u Bips\n",
- dest->me->no, GNUNET_i2s(&dest->me->id),
- dest->dest->no, GNUNET_i2s(&dest->dest->id),
- base_value);
- break;
- case GNUNET_ATS_TEST_TG_LINEAR:
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "Setting up linear preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bips\n",
- dest->me->no, GNUNET_i2s(&dest->me->id),
- dest->dest->no, GNUNET_i2s(&dest->dest->id),
- base_value, value_rate);
- break;
- case GNUNET_ATS_TEST_TG_SINUS:
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "Setting up sinus preference generator master[%u] `%s' and slave [%u] `%s' baserate %u Bips, amplitude %u Bps\n",
- dest->me->no, GNUNET_i2s(&dest->me->id),
- dest->dest->no, GNUNET_i2s(&dest->dest->id),
- base_value, value_rate);
- break;
- case GNUNET_ATS_TEST_TG_RANDOM:
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- "Setting up random preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bps\n",
- dest->me->no, GNUNET_i2s(&dest->me->id),
- dest->dest->no, GNUNET_i2s(&dest->dest->id),
- base_value, value_rate);
- break;
- default:
- break;
- }
- dest->pg = pg;
- pg->set_task = GNUNET_SCHEDULER_add_now(&set_pref_task, dest);
- return pg;
- }
- void
- GNUNET_ATS_TEST_generate_preferences_stop(struct PreferenceGenerator *pg)
- {
- GNUNET_CONTAINER_DLL_remove(pg_head, pg_tail, pg);
- pg->dest->pg = NULL;
- if (NULL != pg->set_task)
- {
- GNUNET_SCHEDULER_cancel(pg->set_task);
- pg->set_task = NULL;
- }
- GNUNET_free(pg);
- }
- /**
- * Stop all preferences generators
- */
- void
- GNUNET_ATS_TEST_generate_preferences_stop_all()
- {
- struct PreferenceGenerator *cur;
- struct PreferenceGenerator *next;
- next = pg_head;
- for (cur = next; NULL != cur; cur = next)
- {
- next = cur->next;
- GNUNET_ATS_TEST_generate_preferences_stop(cur);
- }
- }
- /* end of file ats-testing-preferences.c */
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