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21 * @file ats-tests/ats-testing-preferences.c
22 * @brief ats benchmark: preference generator
23 * @author Christian Grothoff
24 * @author Matthias Wachs
27 #include "gnunet_util_lib.h"
28 #include "ats-testing.h"
30 static struct PreferenceGenerator *pg_head;
31 static struct PreferenceGenerator *pg_tail;
33 extern struct GNUNET_ATS_TEST_Topology *top;
36 get_preference (struct PreferenceGenerator *pg)
38 struct GNUNET_TIME_Relative time_delta;
42 /* Calculate the current preference value */
44 case GNUNET_ATS_TEST_TG_CONSTANT:
45 pref_value = pg->base_value;
47 case GNUNET_ATS_TEST_TG_LINEAR:
48 time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
49 /* Calculate point of time in the current period */
50 time_delta.rel_value_us = time_delta.rel_value_us %
51 pg->duration_period.rel_value_us;
52 delta_value = ((double) time_delta.rel_value_us /
53 pg->duration_period.rel_value_us) * (pg->max_value - pg->base_value);
54 if ((pg->max_value < pg->base_value) &&
55 ((pg->max_value - pg->base_value) > pg->base_value))
57 /* This will cause an underflow */
60 pref_value = pg->base_value + delta_value;
62 case GNUNET_ATS_TEST_TG_RANDOM:
63 delta_value = (double) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
64 10000 * (pg->max_value - pg->base_value)) / 10000;
65 pref_value = pg->base_value + delta_value;
67 case GNUNET_ATS_TEST_TG_SINUS:
68 time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
69 /* Calculate point of time in the current period */
70 time_delta.rel_value_us = time_delta.rel_value_us %
71 pg->duration_period.rel_value_us;
72 if ((pg->max_value - pg->base_value) > pg->base_value)
74 /* This will cause an underflow for second half of sinus period,
75 * will be detected in general when experiments are loaded */
78 delta_value = (pg->max_value - pg->base_value) *
79 sin ( (2 * M_PI) / ((double) pg->duration_period.rel_value_us) *
80 time_delta.rel_value_us);
81 pref_value = pg->base_value + delta_value;
87 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Current preference value is %f\n",
94 set_pref_task (void *cls)
96 struct BenchmarkPartner *p = cls;
98 p->pg->set_task = NULL;
100 pref_value = get_preference (p->pg);
102 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
103 "Setting preference for master [%u] and slave [%u] for %s to %f\n",
104 p->me->no, p->dest->no,
105 GNUNET_ATS_print_preference_type (p->pg->kind), pref_value);
107 GNUNET_ATS_performance_change_preference(p->me->ats_perf_handle,
111 GNUNET_ATS_PREFERENCE_END);
113 switch (p->pg->kind) {
114 case GNUNET_ATS_PREFERENCE_BANDWIDTH:
115 p->pref_bandwidth = pref_value;
117 case GNUNET_ATS_PREFERENCE_LATENCY:
118 p->pref_delay = pref_value;
124 p->pg->set_task = GNUNET_SCHEDULER_add_delayed (p->pg->frequency,
131 * Generate between the source master and the partner and set preferences with a
132 * value depending on the generator.
135 * @param dest partner
136 * @param type type of preferences to generate
137 * @param base_value traffic base rate to send data with
138 * @param value_rate traffic maximum rate to send data with
139 * @param period duration of a period of preferences generation (~ 1/frequency)
140 * @param frequency how long to generate preferences
141 * @param kind ATS preference to generate
142 * @return the preference generator
144 struct PreferenceGenerator *
145 GNUNET_ATS_TEST_generate_preferences_start (struct BenchmarkPeer *src,
146 struct BenchmarkPartner *dest,
147 enum GeneratorType type,
148 unsigned int base_value,
149 unsigned int value_rate,
150 struct GNUNET_TIME_Relative period,
151 struct GNUNET_TIME_Relative frequency,
152 enum GNUNET_ATS_PreferenceKind kind)
154 struct PreferenceGenerator *pg;
156 if (NULL != dest->pg)
162 pg = GNUNET_new (struct PreferenceGenerator);
163 GNUNET_CONTAINER_DLL_insert (pg_head, pg_tail, pg);
168 pg->base_value = base_value;
169 pg->max_value = value_rate;
170 pg->duration_period = period;
171 pg->frequency = frequency;
172 pg->time_start = GNUNET_TIME_absolute_get();
175 case GNUNET_ATS_TEST_TG_CONSTANT:
176 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
177 "Setting up constant preference generator master[%u] `%s' and slave [%u] `%s' max %u Bips\n",
178 dest->me->no, GNUNET_i2s (&dest->me->id),
179 dest->dest->no, GNUNET_i2s (&dest->dest->id),
182 case GNUNET_ATS_TEST_TG_LINEAR:
183 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
184 "Setting up linear preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bips\n",
185 dest->me->no, GNUNET_i2s (&dest->me->id),
186 dest->dest->no, GNUNET_i2s (&dest->dest->id),
187 base_value, value_rate);
189 case GNUNET_ATS_TEST_TG_SINUS:
190 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
191 "Setting up sinus preference generator master[%u] `%s' and slave [%u] `%s' baserate %u Bips, amplitude %u Bps\n",
192 dest->me->no, GNUNET_i2s (&dest->me->id),
193 dest->dest->no, GNUNET_i2s (&dest->dest->id),
194 base_value, value_rate);
196 case GNUNET_ATS_TEST_TG_RANDOM:
197 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
198 "Setting up random preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bps\n",
199 dest->me->no, GNUNET_i2s (&dest->me->id),
200 dest->dest->no, GNUNET_i2s (&dest->dest->id),
201 base_value, value_rate);
208 pg->set_task = GNUNET_SCHEDULER_add_now (&set_pref_task, dest);
214 GNUNET_ATS_TEST_generate_preferences_stop (struct PreferenceGenerator *pg)
216 GNUNET_CONTAINER_DLL_remove (pg_head, pg_tail, pg);
219 if (NULL != pg->set_task)
221 GNUNET_SCHEDULER_cancel (pg->set_task);
230 * Stop all preferences generators
233 GNUNET_ATS_TEST_generate_preferences_stop_all ()
235 struct PreferenceGenerator *cur;
236 struct PreferenceGenerator *next;
238 for (cur = next; NULL != cur; cur = next)
241 GNUNET_ATS_TEST_generate_preferences_stop(cur);
245 /* end of file ats-testing-preferences.c */