blob: ceed60cf33d428bef4200a8c1e3c70bb8d9ed2c7 (
plain)
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
|
/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hicn/hicn-light/config.h>
#include <stdio.h>
#include <float.h>
#include <parc/algol/parc_DisplayIndented.h>
#include <parc/algol/parc_Memory.h>
#include <parc/algol/parc_Object.h>
#include <parc/assert/parc_Assert.h>
#include <hicn/strategies/nexthopStateLowLatency.h>
double strategyNexthopStateLL_GetRTTProbe(StrategyNexthopStateLL *x) {
strategyNexthopStateLL_OptionalAssertValid(x);
if(x->rounds_without_probes > MAX_ROUNS_WITHOUT_PROBES)
return DBL_MAX;
if(x->avg_rtt == -1.0){
if(x->avg_rtt_in_use == -1.0){
return 0.0;
}else{
//this happens if the face recevied probes only in in_use mode
//we set the avf_rtt with rtt_in_use
x->avg_rtt = x->avg_rtt_in_use;
}
}
return x->avg_rtt;
}
double strategyNexthopStateLL_GetRTTInUse(StrategyNexthopStateLL *x) {
strategyNexthopStateLL_OptionalAssertValid(x);
if(x->rounds_without_probes > MAX_ROUNS_WITHOUT_PROBES)
return DBL_MAX;
if(x->avg_rtt_in_use == -1.0)
return strategyNexthopStateLL_GetRTTProbe(x);
return x->avg_rtt_in_use;
}
double strategyNexthopStateLL_GetRTTLive(StrategyNexthopStateLL *x) {
strategyNexthopStateLL_OptionalAssertValid(x);
if(x->in_use){
return strategyNexthopStateLL_GetRTTInUse(x);
}else{
return strategyNexthopStateLL_GetRTTProbe(x);
}
}
double strategyNexthopStateLL_GetQueuing(const StrategyNexthopStateLL *x) {
strategyNexthopStateLL_OptionalAssertValid(x);
if(x->rounds_without_probes > MAX_ROUNS_WITHOUT_PROBES)
return 0.0;
return x->avg_queue;
}
void strategyNexthopStateLL_AddRttSample(StrategyNexthopStateLL *x,
unsigned int rtt){
strategyNexthopStateLL_OptionalAssertValid(x);
x->recevied_probes++;
//form uint to double
double drtt = rtt;
if(x->in_use){
if(x->avg_rtt_in_use == -1.0){
x->avg_rtt_in_use = drtt;
}else{
x->avg_rtt_in_use = (x->avg_rtt_in_use * 0.9) + (drtt * 0.1);
}
}else{
if(x->avg_rtt == -1.0){
x->avg_rtt = drtt;
}else{
x->avg_rtt = (x->avg_rtt * 0.9) + (drtt * 0.1);
}
}
if(x->avg_rtt_in_use == -1.0 || x->avg_rtt == -1.0){
x->avg_queue = 0.0001;
}else{
double queue = x->avg_rtt_in_use - x->avg_rtt;
if(queue < 0){
queue = 0.0001;
}
x->avg_queue = (x->avg_queue * 0.95) + (0.05 * queue);
}
}
void strategyNexthopStateLL_SetUnusedFace(StrategyNexthopStateLL *x){
strategyNexthopStateLL_OptionalAssertValid(x);
x->in_use = false;
}
unsigned strategyNexthopStateLL_GetFaceId(StrategyNexthopStateLL *x) {
strategyNexthopStateLL_OptionalAssertValid(x);
return x->face_id;
}
void strategyNexthopStateLL_IncreaseTryToSwitch(StrategyNexthopStateLL *x,
unsigned round){
if(x->try_to_switch_counter == 0 ||
round == (x->last_try_to_switch_round + 1)){
x->last_try_to_switch_round = round;
x->try_to_switch_counter++;
}else{
x->try_to_switch_counter = 0;
}
}
unsigned strategyNexthopStateLL_GetTryToSwitch(const StrategyNexthopStateLL *x){
return x->try_to_switch_counter;
}
void strategyNexthopStateLL_ResetTryToSwitch(StrategyNexthopStateLL *x){
x->try_to_switch_counter = 0;
}
void strategyNexthopStateLL_SendPacket(StrategyNexthopStateLL *x){
x->in_use = true;
x->sent_packets++;
}
void strategyNexthopStateLL_SentProbe(StrategyNexthopStateLL *x){
x->sent_probes++;
}
void strategyNexthopStateLL_LostProbe(StrategyNexthopStateLL *x){
x->lost_probes++;
}
bool strategyNexthopStateLL_IsLossy(const StrategyNexthopStateLL *x){
if(x->non_lossy_rounds < 10 ||
x->avg_loss_rate > MAX_LOSS_RATE){
return true;
}
return false;
}
void strategyNexthopStateLL_SetIsAllowed(StrategyNexthopStateLL *x, bool allowed){
x->is_allowed = allowed;
}
bool strategyNexthopStateLL_IsAllowed(const StrategyNexthopStateLL *x){
return x->is_allowed;
}
void strategyNexthopStateLL_StartNewRound(StrategyNexthopStateLL *x){
strategyNexthopStateLL_OptionalAssertValid(x);
if(x->sent_packets == 0) //the face was not used in the last round
x->in_use = false;
x->sent_packets = 0;
if(x->recevied_probes == 0){
x->rounds_without_probes++;
}else{
x->rounds_without_probes = 0;
}
x->recevied_probes = 0;
//compute losses in this round
if(x->sent_probes != 0){
double loss_rate = (double) x->lost_probes / (double) x->sent_probes;
x->avg_loss_rate = x->avg_loss_rate * 0.7 + loss_rate * 0.3;
if(x->avg_loss_rate > MAX_LOSS_RATE){
x->non_lossy_rounds = 0;
}else{
x->non_lossy_rounds++;
}
}
x->lost_probes = 0;
x->sent_probes = 0;
}
|
