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[simgrid.git] / src / surf / network_constant.c
1 /* Copyright (c) 2008, 2009, 2010. The SimGrid Team.
2  * All rights reserved.                                                     */
3
4 /* This program is free software; you can redistribute it and/or modify it
5  * under the terms of the license (GNU LGPL) which comes with this package. */
6
7 #include "surf_private.h"
8 #include "surf/random_mgr.h"
9 #include "xbt/dict.h"
10 #include "xbt/str.h"
11 #include "xbt/log.h"
12
13 typedef struct surf_action_network_Constant {
14   s_surf_action_t generic_action;
15   double latency;
16   double lat_init;
17   int suspended;
18 } s_surf_action_network_Constant_t, *surf_action_network_Constant_t;
19
20 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
21 static random_data_t random_latency = NULL;
22 static int host_number_int = 0;
23
24 static void netcste_count_hosts(sg_platf_host_cbarg_t h) {
25   host_number_int++;
26 }
27
28 static void netcste_define_callbacks(void) {
29   sg_platf_host_add_cb(netcste_count_hosts);
30 }
31
32 static int netcste_resource_used(void *resource_id)
33 {
34   return 0;
35 }
36
37 static int netcste_action_unref(surf_action_t action)
38 {
39   action->refcount--;
40   if (!action->refcount) {
41     xbt_swag_remove(action, action->state_set);
42     surf_action_free(&action);
43     return 1;
44   }
45   return 0;
46 }
47
48 static void netcste_action_cancel(surf_action_t action)
49 {
50   return;
51 }
52
53 static double netcste_share_resources(double now)
54 {
55   surf_action_network_Constant_t action = NULL;
56   xbt_swag_t running_actions =
57       surf_network_model->states.running_action_set;
58   double min = -1.0;
59
60   xbt_swag_foreach(action, running_actions) {
61     if (action->latency > 0) {
62       if (min < 0)
63         min = action->latency;
64       else if (action->latency < min)
65         min = action->latency;
66     }
67   }
68
69   return min;
70 }
71
72 static void netcste_update_actions_state(double now, double delta)
73 {
74   surf_action_network_Constant_t action = NULL;
75   surf_action_network_Constant_t next_action = NULL;
76   xbt_swag_t running_actions =
77       surf_network_model->states.running_action_set;
78
79   xbt_swag_foreach_safe(action, next_action, running_actions) {
80     if (action->latency > 0) {
81       if (action->latency > delta) {
82         double_update(&(action->latency), delta);
83       } else {
84         action->latency = 0.0;
85       }
86     }
87     double_update(&(action->generic_action.remains),
88                   action->generic_action.cost * delta / action->lat_init);
89     if (action->generic_action.max_duration != NO_MAX_DURATION)
90       double_update(&(action->generic_action.max_duration), delta);
91
92     if (action->generic_action.remains <= 0) {
93       action->generic_action.finish = surf_get_clock();
94       surf_network_model->action_state_set((surf_action_t) action,
95                                            SURF_ACTION_DONE);
96     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
97                && (action->generic_action.max_duration <= 0)) {
98       action->generic_action.finish = surf_get_clock();
99       surf_network_model->action_state_set((surf_action_t) action,
100                                            SURF_ACTION_DONE);
101     }
102   }
103 }
104
105 static void netcste_update_resource_state(void *id,
106                                           tmgr_trace_event_t event_type,
107                                           double value, double time)
108 {
109   DIE_IMPOSSIBLE;
110 }
111
112 static surf_action_t netcste_communicate(const char *src_name,
113                                          const char *dst_name, double size,
114                                          double rate)
115 {
116   surf_action_network_Constant_t action = NULL;
117
118   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
119
120   action =
121       surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
122                       surf_network_model, 0);
123
124   action->suspended = 0;
125
126   action->latency = sg_latency_factor;          //random_generate(random_latency);
127   action->lat_init = action->latency;
128
129   if (action->latency <= 0.0) {
130     action->generic_action.state_set =
131         surf_network_model->states.done_action_set;
132     xbt_swag_insert(action, action->generic_action.state_set);
133   }
134
135   XBT_OUT();
136
137   return (surf_action_t) action;
138 }
139
140 #ifdef HAVE_TRACING
141 static void netcste_action_set_category(surf_action_t action, const char *category)
142 {
143   //ignore completely the categories in constant model, they are not traced
144 }
145 #endif
146
147 static double netcste_get_link_bandwidth(const void *link)
148 {
149   DIE_IMPOSSIBLE;
150   return -1.0;
151 }
152
153 static double netcste_get_link_latency(const void *link)
154 {
155   DIE_IMPOSSIBLE;
156   return -1.0;
157 }
158
159 static int link_shared(const void *link)
160 {
161   DIE_IMPOSSIBLE;
162   return -1;
163 }
164
165 static void netcste_action_suspend(surf_action_t action)
166 {
167   ((surf_action_network_Constant_t) action)->suspended = 1;
168 }
169
170 static void netcste_action_resume(surf_action_t action)
171 {
172   if (((surf_action_network_Constant_t) action)->suspended)
173     ((surf_action_network_Constant_t) action)->suspended = 0;
174 }
175
176 static int netcste_action_is_suspended(surf_action_t action)
177 {
178   return ((surf_action_network_Constant_t) action)->suspended;
179 }
180
181 static void netcste_finalize(void)
182 {
183   surf_model_exit(surf_network_model);
184   surf_network_model = NULL;
185 }
186
187
188
189 void surf_network_model_init_Constant()
190 {
191   xbt_assert(surf_network_model == NULL);
192   if (surf_network_model)
193     return;
194   surf_network_model = surf_model_init();
195
196   surf_network_model->name = "constant time network";
197   surf_network_model->action_unref = netcste_action_unref;
198   surf_network_model->action_cancel = netcste_action_cancel;
199   surf_network_model->action_recycle = net_action_recycle;
200   surf_network_model->get_remains = net_action_get_remains;
201 #ifdef HAVE_LATENCY_BOUND_TRACKING
202   surf_network_model->get_latency_limited = net_get_link_latency_limited;
203 #endif
204
205   surf_network_model->model_private->resource_used = netcste_resource_used;
206   surf_network_model->model_private->share_resources =
207       netcste_share_resources;
208   surf_network_model->model_private->update_actions_state =
209       netcste_update_actions_state;
210   surf_network_model->model_private->update_resource_state =
211       netcste_update_resource_state;
212   surf_network_model->model_private->finalize = netcste_finalize;
213
214   surf_network_model->suspend = netcste_action_suspend;
215   surf_network_model->resume = netcste_action_resume;
216   surf_network_model->is_suspended = netcste_action_is_suspended;
217   surf_cpu_model->set_max_duration = net_action_set_max_duration;
218
219   surf_network_model->extension.network.communicate = netcste_communicate;
220   surf_network_model->extension.network.get_link_bandwidth =
221       netcste_get_link_bandwidth;
222   surf_network_model->extension.network.get_link_latency =
223       netcste_get_link_latency;
224   surf_network_model->extension.network.link_shared = link_shared;
225 #ifdef HAVE_TRACING
226   surf_network_model->set_category = netcste_action_set_category;
227 #endif
228
229   if (!random_latency)
230     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
231   netcste_define_callbacks();
232   xbt_dynar_push(model_list, &surf_network_model);
233
234   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
235   routing_model_create(sizeof(double), NULL);
236 }