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[simgrid.git] / src / surf / trace_mgr.c
1 /* Authors: Arnaud Legrand                                                  */
2
3 /* This program is free software; you can redistribute it and/or modify it
4    under the terms of the license (GNU LGPL) which comes with this package. */
5
6 #include "xbt/sysdep.h"
7 #include "xbt/error.h"
8 #include "xbt/dict.h"
9 #include "trace_mgr_private.h"
10 #include <stdlib.h>
11
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(trace, surf,
13                                 "Logging specific to the SURF trace module");
14
15 static xbt_dict_t trace_list = NULL;
16 static void _tmgr_trace_free(void *trace)
17 {
18   tmgr_trace_free(trace);
19 }
20
21 tmgr_history_t tmgr_history_new(void)
22 {
23   tmgr_history_t history;
24
25   history = xbt_new0(s_tmgr_history_t, 1);
26
27   history->heap = xbt_heap_new(8, xbt_free);    /* Why 8 ? Well, why not... */
28
29   return history;
30 }
31
32 void tmgr_history_free(tmgr_history_t history)
33 {
34   xbt_heap_free(history->heap);
35   xbt_free(history);
36 }
37
38 tmgr_trace_t tmgr_trace_new(const char *filename)
39 {
40   tmgr_trace_t trace = NULL;
41   FILE *f = NULL;
42   int linecount = 0;
43   char line[256];
44   xbt_heap_float_t periodicity = -1.0;  /* No periodicity by default */
45   s_tmgr_event_t event;
46   tmgr_event_t last_event = NULL;
47
48   if (trace_list) {
49     xbt_dict_get(trace_list, filename, (void **) &trace);
50     if (trace)
51       return trace;
52   }
53
54   /* Parsing et création de la trace */
55
56   if ((f = fopen(filename, "r")) == NULL) {
57     CRITICAL1("Cannot open file '%s'\n", filename);
58   }
59
60   trace = xbt_new0(s_tmgr_trace_t, 1);
61   trace->event_list = xbt_dynar_new(sizeof(s_tmgr_event_t), NULL);
62
63   while (fgets(line, 256, f)) {
64     linecount++;
65     if ((line[0] == '#') || (line[0] == '\n') || (line[0] == '%'))
66       continue;
67
68     if (sscanf(line, "PERIODICITY " XBT_HEAP_FLOAT_T "\n", &(periodicity))
69         == 1) {
70       if (periodicity <= 0) {
71         fprintf(stderr,
72                 "%s,%d: Syntax error. Periodicity has to be positive\n",
73                 filename, linecount);
74         abort();
75 /*      xbt_dynar_free(&(trace->event_list)); */
76 /*      xbt_free(trace);         */
77 /*      return NULL; */
78       }
79       continue;
80     }
81
82     if (sscanf
83         (line, XBT_HEAP_FLOAT_T " " XBT_MAXMIN_FLOAT_T "\n", &event.delta,
84          &event.value) != 2) {
85       fprintf(stderr, "%s,%d: Syntax error\n", filename, linecount);
86       abort();
87 /*       xbt_dynar_free(&(trace->event_list)); */
88 /*       xbt_free(trace);        */
89 /*       return NULL; */
90     }
91
92     if (last_event) {
93       if ((last_event->delta = event.delta - last_event->delta) <= 0) {
94         fprintf(stderr,
95                 "%s,%d: Invalid trace value, events have to be sorted\n",
96                 filename, linecount);
97         abort();
98       }
99     }
100     xbt_dynar_push(trace->event_list, &event);
101     last_event = xbt_dynar_get_ptr(trace->event_list,
102                                    xbt_dynar_length(trace->event_list) -
103                                    1);
104 /*     printf(XBT_HEAP_FLOAT_T " " XBT_MAXMIN_FLOAT_T "\n", event.delta, */
105 /*         event.value); */
106   }
107
108   if (periodicity > 0) {
109     if (last_event)
110       last_event->delta = periodicity;
111   }
112
113   if (!trace_list)
114     trace_list = xbt_dict_new();
115
116   xbt_dict_set(trace_list, filename, (void *) trace, _tmgr_trace_free);
117
118   fclose(f);
119
120   return trace;
121 }
122
123
124 void tmgr_trace_free(tmgr_trace_t trace)
125 {
126   if (!trace)
127     return;
128   xbt_dynar_free(&(trace->event_list));
129   xbt_free(trace);
130 }
131
132 tmgr_trace_event_t tmgr_history_add_trace(tmgr_history_t history, tmgr_trace_t trace,
133                                           xbt_heap_float_t start_time, int offset,
134                                           void *resource)
135 {
136   tmgr_trace_event_t trace_event = NULL;
137
138
139   trace_event = xbt_new0(s_tmgr_trace_event_t, 1);
140   trace_event->trace = trace;
141   trace_event->idx = offset;
142   trace_event->resource = resource;
143
144   if (trace_event->idx >= xbt_dynar_length(trace->event_list))
145     abort();
146
147   xbt_heap_push(history->heap, trace_event, start_time);
148
149   return trace_event;
150 }
151
152 xbt_heap_float_t tmgr_history_next_date(tmgr_history_t history)
153 {
154   if (xbt_heap_size(history->heap))
155     return (xbt_heap_maxkey(history->heap));
156   else
157     return -1.0;
158 }
159
160 tmgr_trace_event_t tmgr_history_get_next_event_leq(tmgr_history_t history,
161                                                    xbt_heap_float_t date,
162                                                    xbt_maxmin_float_t * value,
163                                                    void **resource)
164 {
165   xbt_heap_float_t event_date = xbt_heap_maxkey(history->heap);
166   tmgr_trace_event_t trace_event = NULL;
167   tmgr_event_t event = NULL;
168   tmgr_trace_t trace = NULL;
169
170   if (event_date > date)
171     return NULL;
172
173   if (!(trace_event = xbt_heap_pop(history->heap)))
174     return NULL;
175
176   trace = trace_event->trace;
177   event = xbt_dynar_get_ptr(trace->event_list, trace_event->idx);
178
179
180   *value = event->value;
181   *resource = trace_event->resource;
182
183   if (trace_event->idx < xbt_dynar_length(trace->event_list) - 1) {
184     xbt_heap_push(history->heap, trace_event, event_date + event->delta);
185     trace_event->idx++;
186   } else if (event->delta > 0) {        /* Last element, checking for periodicity */
187     xbt_heap_push(history->heap, trace_event, event_date + event->delta);
188     trace_event->idx = 0;
189   } else {                      /* We don't need this trace_event anymore */
190     xbt_free(trace_event);
191   }
192
193   return trace_event;
194 }
195
196 void tmgr_finalize(void)
197 {
198   xbt_dict_free(&trace_list);
199 }