src/surf/trace_mgr.c

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "xbt/sysdep.h"
   9 #include "xbt/error.h"
  10 #include "xbt/dict.h"
  11 #include "trace_mgr_private.h"
  12 #include <stdlib.h>
  13
  14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(trace, surf,
  15                                 "Logging specific to the SURF trace module");
  16
  17 static xbt_dict_t trace_list = NULL;
  18 static void _tmgr_trace_free(void *trace)
  19 {
  20   tmgr_trace_free(trace);
  21 }
  22
  23 tmgr_history_t tmgr_history_new(void)
  24 {
  25   tmgr_history_t history;
  26
  27   history = xbt_new0(s_tmgr_history_t, 1);
  28
  29   history->heap = xbt_heap_new(8, xbt_free);    /* Why 8 ? Well, why not... */
  30
  31   return history;
  32 }
  33
  34 void tmgr_history_free(tmgr_history_t history)
  35 {
  36   xbt_heap_free(history->heap);
  37   xbt_free(history);
  38 }
  39
  40 tmgr_trace_t tmgr_trace_new(const char *filename)
  41 {
  42   tmgr_trace_t trace = NULL;
  43   FILE *f = NULL;
  44   int linecount = 0;
  45   char line[256];
  46   double periodicity = -1.0;    /* No periodicity by default */
  47   s_tmgr_event_t event;
  48   tmgr_event_t last_event = NULL;
  49
  50   if (trace_list) {
  51     xbt_dict_get(trace_list, filename, (void **) &trace);
  52     if (trace)
  53       return trace;
  54   }
  55
  56   if ((f = fopen(filename, "r")) == NULL) {
  57     xbt_assert1(0, "Cannot open file '%s'", 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 " "%lg" "\n", &(periodicity))
  69         == 1) {
  70       if (periodicity <= 0) {
  71         xbt_assert2(0,
  72                     "%s,%d: Syntax error. Periodicity has to be positive",
  73                     filename, linecount);
  74       }
  75       continue;
  76     }
  77
  78     if (sscanf
  79         (line, "%lg" " " "%lg" "\n", &event.delta, &event.value) != 2) {
  80       xbt_assert2(0, "%s,%d: Syntax error", filename, linecount);
  81     }
  82
  83     if (last_event) {
  84       if ((last_event->delta = event.delta - last_event->delta) <= 0) {
  85         xbt_assert2(0,
  86                     "%s,%d: Invalid trace value, events have to be sorted",
  87                     filename, linecount);
  88       }
  89     }
  90     xbt_dynar_push(trace->event_list, &event);
  91     last_event = xbt_dynar_get_ptr(trace->event_list,
  92                                    xbt_dynar_length(trace->event_list) -
  93                                    1);
  94   }
  95
  96   if (periodicity > 0) {
  97     if (last_event)
  98       last_event->delta = periodicity;
  99   }
 100
 101   if (!trace_list)
 102     trace_list = xbt_dict_new();
 103
 104   xbt_dict_set(trace_list, filename, (void *) trace, _tmgr_trace_free);
 105
 106   fclose(f);
 107
 108   return trace;
 109 }
 110
 111
 112 void tmgr_trace_free(tmgr_trace_t trace)
 113 {
 114   if (!trace)
 115     return;
 116   xbt_dynar_free(&(trace->event_list));
 117   xbt_free(trace);
 118 }
 119
 120 tmgr_trace_event_t tmgr_history_add_trace(tmgr_history_t history,
 121                                           tmgr_trace_t trace,
 122                                           double start_time, int offset,
 123                                           void *resource)
 124 {
 125   tmgr_trace_event_t trace_event = NULL;
 126
 127
 128   trace_event = xbt_new0(s_tmgr_trace_event_t, 1);
 129   trace_event->trace = trace;
 130   trace_event->idx = offset;
 131   trace_event->resource = resource;
 132
 133   xbt_assert0((trace_event->idx < xbt_dynar_length(trace->event_list)),
 134               "You're refering to an event that does not exist!");
 135
 136   xbt_heap_push(history->heap, trace_event, start_time);
 137
 138   return trace_event;
 139 }
 140
 141 double tmgr_history_next_date(tmgr_history_t history)
 142 {
 143   if (xbt_heap_size(history->heap))
 144     return (xbt_heap_maxkey(history->heap));
 145   else
 146     return -1.0;
 147 }
 148
 149 tmgr_trace_event_t tmgr_history_get_next_event_leq(tmgr_history_t history,
 150                                                    double date,
 151                                                    double *value,
 152                                                    void **resource)
 153 {
 154   double event_date = xbt_heap_maxkey(history->heap);
 155   tmgr_trace_event_t trace_event = NULL;
 156   tmgr_event_t event = NULL;
 157   tmgr_trace_t trace = NULL;
 158
 159   if (event_date > date)
 160     return NULL;
 161
 162   if (!(trace_event = xbt_heap_pop(history->heap)))
 163     return NULL;
 164
 165   trace = trace_event->trace;
 166   event = xbt_dynar_get_ptr(trace->event_list, trace_event->idx);
 167
 168
 169   *value = event->value;
 170   *resource = trace_event->resource;
 171
 172   if (trace_event->idx < xbt_dynar_length(trace->event_list) - 1) {
 173     xbt_heap_push(history->heap, trace_event, event_date + event->delta);
 174     trace_event->idx++;
 175   } else if (event->delta > 0) {        /* Last element, checking for periodicity */
 176     xbt_heap_push(history->heap, trace_event, event_date + event->delta);
 177     trace_event->idx = 0;
 178   } else {                      /* We don't need this trace_event anymore */
 179     xbt_free(trace_event);
 180   }
 181
 182   return trace_event;
 183 }
 184
 185 void tmgr_finalize(void)
 186 {
 187   xbt_dict_free(&trace_list);
 188 }