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-rw-r--r--src/ats-tests/ats-testing-preferences.c265
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diff --git a/src/ats-tests/ats-testing-preferences.c b/src/ats-tests/ats-testing-preferences.c
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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2010-2013 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20/**
21 * @file ats-tests/ats-testing-preferences.c
22 * @brief ats benchmark: preference generator
23 * @author Christian Grothoff
24 * @author Matthias Wachs
25 */
26#include "platform.h"
27#include "gnunet_util_lib.h"
28#include "ats-testing.h"
29
30static struct PreferenceGenerator *pg_head;
31static struct PreferenceGenerator *pg_tail;
32
33extern struct GNUNET_ATS_TEST_Topology *top;
34
35static double
36get_preference (struct PreferenceGenerator *pg)
37{
38 struct GNUNET_TIME_Relative time_delta;
39 double delta_value;
40 double pref_value;
41
42 /* Calculate the current preference value */
43 switch (pg->type)
44 {
45 case GNUNET_ATS_TEST_TG_CONSTANT:
46 pref_value = pg->base_value;
47 break;
48
49 case GNUNET_ATS_TEST_TG_LINEAR:
50 time_delta = GNUNET_TIME_absolute_get_duration (pg->time_start);
51 /* Calculate point of time in the current period */
52 time_delta.rel_value_us = time_delta.rel_value_us
53 % pg->duration_period.rel_value_us;
54 delta_value = ((double) time_delta.rel_value_us
55 / pg->duration_period.rel_value_us) * (pg->max_value
56 - pg->base_value);
57 if ((pg->max_value < pg->base_value) &&
58 ((pg->max_value - pg->base_value) > pg->base_value))
59 {
60 /* This will cause an underflow */
61 GNUNET_break (0);
62 }
63 pref_value = pg->base_value + delta_value;
64 break;
65
66 case GNUNET_ATS_TEST_TG_RANDOM:
67 delta_value = (double) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
68 10000 * (pg->max_value
69 - pg->base_value))
70 / 10000;
71 pref_value = pg->base_value + delta_value;
72 break;
73
74 case GNUNET_ATS_TEST_TG_SINUS:
75 time_delta = GNUNET_TIME_absolute_get_duration (pg->time_start);
76 /* Calculate point of time in the current period */
77 time_delta.rel_value_us = time_delta.rel_value_us
78 % pg->duration_period.rel_value_us;
79 if ((pg->max_value - pg->base_value) > pg->base_value)
80 {
81 /* This will cause an underflow for second half of sinus period,
82 * will be detected in general when experiments are loaded */
83 GNUNET_break (0);
84 }
85 delta_value = (pg->max_value - pg->base_value)
86 * sin ((2 * M_PI)
87 / ((double) pg->duration_period.rel_value_us)
88 * time_delta.rel_value_us);
89 pref_value = pg->base_value + delta_value;
90 break;
91
92 default:
93 pref_value = 0.0;
94 break;
95 }
96 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Current preference value is %f\n",
97 pref_value);
98 return pref_value;
99}
100
101
102static void
103set_pref_task (void *cls)
104{
105 struct BenchmarkPartner *p = cls;
106 double pref_value;
107
108 p->pg->set_task = NULL;
109
110 pref_value = get_preference (p->pg);
111
112 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
113 "Setting preference for master [%u] and slave [%u] for %s to %f\n",
114 p->me->no, p->dest->no,
115 GNUNET_ATS_print_preference_type (p->pg->kind), pref_value);
116
117 GNUNET_ATS_performance_change_preference (p->me->ats_perf_handle,
118 &p->dest->id,
119 p->pg->kind,
120 pref_value,
121 GNUNET_ATS_PREFERENCE_END);
122
123 switch (p->pg->kind)
124 {
125 case GNUNET_ATS_PREFERENCE_BANDWIDTH:
126 p->pref_bandwidth = pref_value;
127 break;
128
129 case GNUNET_ATS_PREFERENCE_LATENCY:
130 p->pref_delay = pref_value;
131 break;
132
133 default:
134 break;
135 }
136
137 p->pg->set_task = GNUNET_SCHEDULER_add_delayed (p->pg->frequency,
138 set_pref_task, p);
139}
140
141
142/**
143 * Generate between the source master and the partner and set preferences with a
144 * value depending on the generator.
145 *
146 * @param src source
147 * @param dest partner
148 * @param type type of preferences to generate
149 * @param base_value traffic base rate to send data with
150 * @param value_rate traffic maximum rate to send data with
151 * @param period duration of a period of preferences generation (~ 1/frequency)
152 * @param frequency how long to generate preferences
153 * @param kind ATS preference to generate
154 * @return the preference generator
155 */
156struct PreferenceGenerator *
157GNUNET_ATS_TEST_generate_preferences_start (struct BenchmarkPeer *src,
158 struct BenchmarkPartner *dest,
159 enum GeneratorType type,
160 unsigned int base_value,
161 unsigned int value_rate,
162 struct GNUNET_TIME_Relative period,
163 struct GNUNET_TIME_Relative
164 frequency,
165 enum GNUNET_ATS_PreferenceKind kind)
166{
167 struct PreferenceGenerator *pg;
168
169 if (NULL != dest->pg)
170 {
171 GNUNET_break (0);
172 return NULL;
173 }
174
175 pg = GNUNET_new (struct PreferenceGenerator);
176 GNUNET_CONTAINER_DLL_insert (pg_head, pg_tail, pg);
177 pg->type = type;
178 pg->src = src;
179 pg->dest = dest;
180 pg->kind = kind;
181 pg->base_value = base_value;
182 pg->max_value = value_rate;
183 pg->duration_period = period;
184 pg->frequency = frequency;
185 pg->time_start = GNUNET_TIME_absolute_get ();
186
187 switch (type)
188 {
189 case GNUNET_ATS_TEST_TG_CONSTANT:
190 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
191 "Setting up constant preference generator master[%u] `%s' and slave [%u] `%s' max %u Bips\n",
192 dest->me->no, GNUNET_i2s (&dest->me->id),
193 dest->dest->no, GNUNET_i2s (&dest->dest->id),
194 base_value);
195 break;
196
197 case GNUNET_ATS_TEST_TG_LINEAR:
198 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
199 "Setting up linear preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bips\n",
200 dest->me->no, GNUNET_i2s (&dest->me->id),
201 dest->dest->no, GNUNET_i2s (&dest->dest->id),
202 base_value, value_rate);
203 break;
204
205 case GNUNET_ATS_TEST_TG_SINUS:
206 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
207 "Setting up sinus preference generator master[%u] `%s' and slave [%u] `%s' baserate %u Bips, amplitude %u Bps\n",
208 dest->me->no, GNUNET_i2s (&dest->me->id),
209 dest->dest->no, GNUNET_i2s (&dest->dest->id),
210 base_value, value_rate);
211 break;
212
213 case GNUNET_ATS_TEST_TG_RANDOM:
214 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
215 "Setting up random preference generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bps\n",
216 dest->me->no, GNUNET_i2s (&dest->me->id),
217 dest->dest->no, GNUNET_i2s (&dest->dest->id),
218 base_value, value_rate);
219 break;
220
221 default:
222 break;
223 }
224
225 dest->pg = pg;
226 pg->set_task = GNUNET_SCHEDULER_add_now (&set_pref_task, dest);
227 return pg;
228}
229
230
231void
232GNUNET_ATS_TEST_generate_preferences_stop (struct PreferenceGenerator *pg)
233{
234 GNUNET_CONTAINER_DLL_remove (pg_head, pg_tail, pg);
235 pg->dest->pg = NULL;
236
237 if (NULL != pg->set_task)
238 {
239 GNUNET_SCHEDULER_cancel (pg->set_task);
240 pg->set_task = NULL;
241 }
242
243 GNUNET_free (pg);
244}
245
246
247/**
248 * Stop all preferences generators
249 */
250void
251GNUNET_ATS_TEST_generate_preferences_stop_all ()
252{
253 struct PreferenceGenerator *cur;
254 struct PreferenceGenerator *next;
255
256 next = pg_head;
257 for (cur = next; NULL != cur; cur = next)
258 {
259 next = cur->next;
260 GNUNET_ATS_TEST_generate_preferences_stop (cur);
261 }
262}
263
264
265/* end of file ats-testing-preferences.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 17:02:43 +0000