1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/*
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 General Public License as published
by the Free Software Foundation; either version 3, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @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 */
|
