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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(void)
25 {
26   host_number_int++;
27 }
28
29 static void netcste_define_callbacks(const char *file)
30 {
31   surfxml_add_callback(STag_surfxml_host_cb_list, &netcste_count_hosts);
32 }
33
34 static int netcste_resource_used(void *resource_id)
35 {
36   return 0;
37 }
38
39 static int netcste_action_unref(surf_action_t action)
40 {
41   action->refcount--;
42   if (!action->refcount) {
43     xbt_swag_remove(action, action->state_set);
44     free(action);
45     return 1;
46   }
47   return 0;
48 }
49
50 static void netcste_action_cancel(surf_action_t action)
51 {
52   return;
53 }
54
55 static double netcste_share_resources(double now)
56 {
57   surf_action_network_Constant_t action = NULL;
58   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
59   double min = -1.0;
60
61   xbt_swag_foreach(action, running_actions) {
62     if (action->latency > 0) {
63       if (min < 0)
64         min = action->latency;
65       else if (action->latency < min)
66         min = action->latency;
67     }
68   }
69
70   return min;
71 }
72
73 static void netcste_update_actions_state(double now, double delta)
74 {
75   surf_action_network_Constant_t action = NULL;
76   surf_action_network_Constant_t next_action = NULL;
77   xbt_swag_t running_actions = 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, const char *dst_name,
113                                  double size, double rate)
114 {
115   surf_action_network_Constant_t action = NULL;
116
117   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
118
119   action =
120     surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
121                     surf_network_model, 0);
122
123   action->suspended = 0;
124
125   action->latency = 1;          //random_generate(random_latency);
126   action->lat_init = action->latency;
127
128   if (action->latency <= 0.0) {
129     action->generic_action.state_set =
130       surf_network_model->states.done_action_set;
131     xbt_swag_insert(action, action->generic_action.state_set);
132   }
133
134   XBT_OUT;
135
136   return (surf_action_t) action;
137 }
138
139 /* returns an array of link_Constant_t */
140 static xbt_dynar_t netcste_get_route(void *src, void *dst)
141 {
142   xbt_die("Calling this function does not make any sense");
143 }
144
145 static double netcste_get_link_bandwidth(const void *link)
146 {
147   DIE_IMPOSSIBLE;
148 }
149
150 static double netcste_get_link_latency(const void *link)
151 {
152   DIE_IMPOSSIBLE;
153 }
154
155 static int link_shared(const void *link)
156 {
157   DIE_IMPOSSIBLE;
158 }
159
160 static void netcste_action_suspend(surf_action_t action)
161 {
162   ((surf_action_network_Constant_t) action)->suspended = 1;
163 }
164
165 static void netcste_action_resume(surf_action_t action)
166 {
167   if (((surf_action_network_Constant_t) action)->suspended)
168     ((surf_action_network_Constant_t) action)->suspended = 0;
169 }
170
171 static int netcste_action_is_suspended(surf_action_t action)
172 {
173   return ((surf_action_network_Constant_t) action)->suspended;
174 }
175
176 static void netcste_finalize(void)
177 {
178   surf_model_exit(surf_network_model);
179   surf_network_model = NULL;
180 }
181
182
183
184 void surf_network_model_init_Constant(const char *filename)
185 {
186   xbt_assert(surf_network_model == NULL);
187   if (surf_network_model)
188     return;
189   surf_network_model = surf_model_init();
190
191   INFO0("Blah");
192   surf_network_model->name = "constant time network";
193   surf_network_model->action_unref = netcste_action_unref;
194   surf_network_model->action_cancel = netcste_action_cancel;
195   surf_network_model->action_recycle = net_action_recycle;
196   surf_network_model->get_remains = net_action_get_remains;
197   surf_network_model->get_latency_limited = net_get_link_latency;
198
199   surf_network_model->model_private->resource_used = netcste_resource_used;
200   surf_network_model->model_private->share_resources = netcste_share_resources;
201   surf_network_model->model_private->update_actions_state =
202     netcste_update_actions_state;
203   surf_network_model->model_private->update_resource_state =
204     netcste_update_resource_state;
205   surf_network_model->model_private->finalize = netcste_finalize;
206
207   surf_network_model->suspend = netcste_action_suspend;
208   surf_network_model->resume = netcste_action_resume;
209   surf_network_model->is_suspended = netcste_action_is_suspended;
210   surf_cpu_model->set_max_duration = net_action_set_max_duration;
211
212   surf_network_model->extension.network.communicate = netcste_communicate;
213   surf_network_model->extension.network.get_link_bandwidth =
214     netcste_get_link_bandwidth;
215   surf_network_model->extension.network.get_link_latency = netcste_get_link_latency;
216   surf_network_model->extension.network.link_shared = link_shared;
217
218   if (!random_latency)
219     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
220   netcste_define_callbacks(filename);
221   xbt_dynar_push(model_list, &surf_network_model);
222
223   update_model_description(surf_network_model_description,
224                            "Constant", surf_network_model);
225
226   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
227   routing_model_create(sizeof(double), NULL);
228 }