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19 * @file ats-tests/ats-testing-preferences.c
20 * @brief ats benchmark: preference generator
21 * @author Christian Grothoff
22 * @author Matthias Wachs
25 #include "gnunet_util_lib.h"
26 #include "ats-testing.h"
28 static struct PreferenceGenerator *pg_head;
29 static struct PreferenceGenerator *pg_tail;
31 extern struct GNUNET_ATS_TEST_Topology *top;
34 get_preference (struct PreferenceGenerator *pg)
36 struct GNUNET_TIME_Relative time_delta;
40 /* Calculate the current preference value */
42 case GNUNET_ATS_TEST_TG_CONSTANT:
43 pref_value = pg->base_value;
45 case GNUNET_ATS_TEST_TG_LINEAR:
46 time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
47 /* Calculate point of time in the current period */
48 time_delta.rel_value_us = time_delta.rel_value_us %
49 pg->duration_period.rel_value_us;
50 delta_value = ((double) time_delta.rel_value_us /
51 pg->duration_period.rel_value_us) * (pg->max_value - pg->base_value);
52 if ((pg->max_value < pg->base_value) &&
53 ((pg->max_value - pg->base_value) > pg->base_value))
55 /* This will cause an underflow */
58 pref_value = pg->base_value + delta_value;
60 case GNUNET_ATS_TEST_TG_RANDOM:
61 delta_value = (double) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
62 10000 * (pg->max_value - pg->base_value)) / 10000;
63 pref_value = pg->base_value + delta_value;
65 case GNUNET_ATS_TEST_TG_SINUS:
66 time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
67 /* Calculate point of time in the current period */
68 time_delta.rel_value_us = time_delta.rel_value_us %
69 pg->duration_period.rel_value_us;
70 if ((pg->max_value - pg->base_value) > pg->base_value)
72 /* This will cause an underflow for second half of sinus period,
73 * will be detected in general when experiments are loaded */
76 delta_value = (pg->max_value - pg->base_value) *
77 sin ( (2 * M_PI) / ((double) pg->duration_period.rel_value_us) *
78 time_delta.rel_value_us);
79 pref_value = pg->base_value + delta_value;
85 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Current preference value is %f\n",
92 set_pref_task (void *cls)
94 struct BenchmarkPartner *p = cls;
96 p->pg->set_task = NULL;
98 pref_value = get_preference (p->pg);
100 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
101 "Setting preference for master [%u] and slave [%u] for %s to %f\n",
102 p->me->no, p->dest->no,
103 GNUNET_ATS_print_preference_type (p->pg->kind), pref_value);
105 GNUNET_ATS_performance_change_preference(p->me->ats_perf_handle,
109 GNUNET_ATS_PREFERENCE_END);
111 switch (p->pg->kind) {
112 case GNUNET_ATS_PREFERENCE_BANDWIDTH:
113 p->pref_bandwidth = pref_value;
115 case GNUNET_ATS_PREFERENCE_LATENCY:
116 p->pref_delay = pref_value;
122 p->pg->set_task = GNUNET_SCHEDULER_add_delayed (p->pg->frequency,
129 * Generate between the source master and the partner and set preferences with a
130 * value depending on the generator.
133 * @param dest partner
134 * @param type type of preferences to generate
135 * @param base_value traffic base rate to send data with
136 * @param value_rate traffic maximum rate to send data with
137 * @param period duration of a period of preferences generation (~ 1/frequency)
138 * @param frequency how long to generate preferences
139 * @param kind ATS preference to generate
140 * @return the preference generator
142 struct PreferenceGenerator *
143 GNUNET_ATS_TEST_generate_preferences_start (struct BenchmarkPeer *src,
144 struct BenchmarkPartner *dest,
145 enum GeneratorType type,
146 unsigned int base_value,
147 unsigned int value_rate,
148 struct GNUNET_TIME_Relative period,
149 struct GNUNET_TIME_Relative frequency,
150 enum GNUNET_ATS_PreferenceKind kind)
152 struct PreferenceGenerator *pg;
154 if (NULL != dest->pg)
160 pg = GNUNET_new (struct PreferenceGenerator);
161 GNUNET_CONTAINER_DLL_insert (pg_head, pg_tail, pg);
166 pg->base_value = base_value;
167 pg->max_value = value_rate;
168 pg->duration_period = period;
169 pg->frequency = frequency;
170 pg->time_start = GNUNET_TIME_absolute_get();
173 case GNUNET_ATS_TEST_TG_CONSTANT:
174 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
175 "Setting up constant preference generator master[%u] `%s' and slave [%u] `%s' max %u Bips\n",
176 dest->me->no, GNUNET_i2s (&dest->me->id),
177 dest->dest->no, GNUNET_i2s (&dest->dest->id),
180 case GNUNET_ATS_TEST_TG_LINEAR:
181 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
182 "Setting up linear preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bips\n",
183 dest->me->no, GNUNET_i2s (&dest->me->id),
184 dest->dest->no, GNUNET_i2s (&dest->dest->id),
185 base_value, value_rate);
187 case GNUNET_ATS_TEST_TG_SINUS:
188 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
189 "Setting up sinus preference generator master[%u] `%s' and slave [%u] `%s' baserate %u Bips, amplitude %u Bps\n",
190 dest->me->no, GNUNET_i2s (&dest->me->id),
191 dest->dest->no, GNUNET_i2s (&dest->dest->id),
192 base_value, value_rate);
194 case GNUNET_ATS_TEST_TG_RANDOM:
195 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
196 "Setting up random preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bps\n",
197 dest->me->no, GNUNET_i2s (&dest->me->id),
198 dest->dest->no, GNUNET_i2s (&dest->dest->id),
199 base_value, value_rate);
206 pg->set_task = GNUNET_SCHEDULER_add_now (&set_pref_task, dest);
212 GNUNET_ATS_TEST_generate_preferences_stop (struct PreferenceGenerator *pg)
214 GNUNET_CONTAINER_DLL_remove (pg_head, pg_tail, pg);
217 if (NULL != pg->set_task)
219 GNUNET_SCHEDULER_cancel (pg->set_task);
228 * Stop all preferences generators
231 GNUNET_ATS_TEST_generate_preferences_stop_all ()
233 struct PreferenceGenerator *cur;
234 struct PreferenceGenerator *next;
236 for (cur = next; NULL != cur; cur = next)
239 GNUNET_ATS_TEST_generate_preferences_stop(cur);
243 /* end of file ats-testing-preferences.c */