1 /* Copyright (c) 2004, 2005, 2007, 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
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. */
7 #include "xbt/sysdep.h"
11 #include "trace_mgr_private.h"
12 #include "surf_private.h"
13 #include "xbt/RngStream.h"
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_trace, surf, "Surf trace management");
18 static xbt_dict_t trace_list = NULL;
20 XBT_INLINE tmgr_history_t tmgr_history_new(void)
24 h = xbt_new0(s_tmgr_history_t, 1);
26 h->heap = xbt_heap_new(8, xbt_free_f); /* Why 8 ? Well, why not... */
31 XBT_INLINE void tmgr_history_free(tmgr_history_t h)
33 xbt_heap_free(h->heap);
37 tmgr_trace_t tmgr_trace_new_from_generator(const char *id,
38 probabilist_event_generator_t generator1,
39 probabilist_event_generator_t generator2,
42 tmgr_trace_t trace = NULL;
44 trace = xbt_new0(s_tmgr_trace_t, 1);
45 trace->type = e_trace_probabilist;
47 trace->s_probabilist.event_generator[0] = generator1;
49 //FIXME : may also be a parameter
50 trace->s_probabilist.next_event = 0;
51 trace->s_probabilist.is_state_trace = is_state_trace;
53 if(generator2 != NULL) {
54 trace->s_probabilist.event_generator[1] = generator2;
55 } else if(is_state_trace) {
56 trace->s_probabilist.event_generator[1] = generator1;
58 THROW_IMPOSSIBLE; //That case should have been checked before, anyway...
64 probabilist_event_generator_t tmgr_event_generator_new_uniform(const char* id,
68 probabilist_event_generator_t event_generator = NULL;
69 RngStream rng_stream = NULL;
71 rng_stream = sg_platf_rng_stream_get(id);
73 event_generator = xbt_new0(s_probabilist_event_generator_t, 1);
74 event_generator->type = e_generator_uniform;
75 event_generator->s_uniform_parameters.min = min;
76 event_generator->s_uniform_parameters.max = max;
77 event_generator->rng_stream = rng_stream;
79 tmgr_event_generator_next_value(event_generator);
81 return event_generator;
84 probabilist_event_generator_t tmgr_event_generator_new_exponential(const char* id,
87 probabilist_event_generator_t event_generator = NULL;
88 RngStream rng_stream = NULL;
90 rng_stream = sg_platf_rng_stream_get(id);
92 event_generator = xbt_new0(s_probabilist_event_generator_t, 1);
93 event_generator->type = e_generator_exponential;
94 event_generator->s_exponential_parameters.rate = rate;
95 event_generator->rng_stream = rng_stream;
97 tmgr_event_generator_next_value(event_generator);
99 return event_generator;
102 probabilist_event_generator_t tmgr_event_generator_new_weibull(const char* id,
106 probabilist_event_generator_t event_generator = NULL;
107 RngStream rng_stream = NULL;
109 rng_stream = sg_platf_rng_stream_get(id);
111 event_generator = xbt_new0(s_probabilist_event_generator_t, 1);
112 event_generator->type = e_generator_weibull;
113 event_generator->s_weibull_parameters.scale = scale;
114 event_generator->s_weibull_parameters.shape = shape;
115 event_generator->rng_stream = rng_stream;
117 tmgr_event_generator_next_value(event_generator);
119 return event_generator;
122 double tmgr_event_generator_next_value(probabilist_event_generator_t generator)
125 switch(generator->type) {
126 case e_generator_uniform:
127 generator->next_value = (RngStream_RandU01(generator->rng_stream)
128 * (generator->s_uniform_parameters.max - generator->s_uniform_parameters.min))
129 + generator->s_uniform_parameters.min;
131 case e_generator_exponential:
132 generator->next_value = -log(RngStream_RandU01(generator->rng_stream))
133 / generator->s_exponential_parameters.rate;
135 case e_generator_weibull:
136 generator->next_value = - generator->s_weibull_parameters.scale
137 * pow( log(RngStream_RandU01(generator->rng_stream)),
138 1.0 / generator->s_weibull_parameters.shape );
141 return generator->next_value;
144 tmgr_trace_t tmgr_trace_new_from_string(const char *id, const char *input,
147 tmgr_trace_t trace = NULL;
149 s_tmgr_event_t event;
150 tmgr_event_t last_event = NULL;
156 trace = xbt_dict_get_or_null(trace_list, id);
158 XBT_WARN("Ignoring redefinition of trace %s", id);
163 xbt_assert(periodicity >= 0,
164 "Invalid periodicity %lg (must be positive)", periodicity);
166 trace = xbt_new0(s_tmgr_trace_t, 1);
167 trace->type = e_trace_list;
168 trace->s_list.event_list = xbt_dynar_new(sizeof(s_tmgr_event_t), NULL);
170 list = xbt_str_split(input, "\n\r");
172 xbt_dynar_foreach(list, cpt, val) {
174 xbt_str_trim(val, " \t\n\r\x0B");
175 if (val[0] == '#' || val[0] == '\0' || val[0] == '%')
178 if (sscanf(val, "PERIODICITY " "%lg" "\n", &periodicity) == 1)
181 if (sscanf(val, "%lg" " " "%lg" "\n", &event.delta, &event.value) != 2)
182 xbt_die("%s:%d: Syntax error in trace\n%s", id, linecount, input);
185 if (last_event->delta > event.delta) {
186 xbt_die("%s:%d: Invalid trace: Events must be sorted, "
187 "but time %lg > time %lg.\n%s",
188 id, linecount, last_event->delta, event.delta, input);
190 last_event->delta = event.delta - last_event->delta;
192 xbt_dynar_push(trace->s_list.event_list, &event);
194 xbt_dynar_get_ptr(trace->s_list.event_list,
195 xbt_dynar_length(trace->s_list.event_list) - 1);
198 last_event->delta = periodicity;
201 trace_list = xbt_dict_new_homogeneous((void (*)(void *)) tmgr_trace_free);
203 xbt_dict_set(trace_list, id, (void *) trace, NULL);
205 xbt_dynar_free(&list);
209 tmgr_trace_t tmgr_trace_new_from_file(const char *filename)
213 tmgr_trace_t trace = NULL;
215 if ((!filename) || (strcmp(filename, "") == 0))
219 trace = xbt_dict_get_or_null(trace_list, filename);
221 XBT_WARN("Ignoring redefinition of trace %s", filename);
226 f = surf_fopen(filename, "r");
227 xbt_assert(f != NULL, "Cannot open file '%s' (path=%s)", filename,
228 xbt_str_join(surf_path, ":"));
230 tstr = xbt_str_from_file(f);
232 trace = tmgr_trace_new_from_string(filename, tstr, 0.);
238 tmgr_trace_t tmgr_empty_trace_new(void)
240 tmgr_trace_t trace = NULL;
241 s_tmgr_event_t event;
243 trace = xbt_new0(s_tmgr_trace_t, 1);
244 trace->type = e_trace_list;
245 trace->s_list.event_list = xbt_dynar_new(sizeof(s_tmgr_event_t), NULL);
249 xbt_dynar_push(trace->s_list.event_list, &event);
254 XBT_INLINE void tmgr_trace_free(tmgr_trace_t trace)
259 switch(trace->type) {
261 xbt_dynar_free(&(trace->s_list.event_list));
263 case e_trace_probabilist:
270 tmgr_trace_event_t tmgr_history_add_trace(tmgr_history_t h,
273 unsigned int offset, void *model)
275 tmgr_trace_event_t trace_event = NULL;
277 trace_event = xbt_new0(s_tmgr_trace_event_t, 1);
278 trace_event->trace = trace;
279 trace_event->idx = offset;
280 trace_event->model = model;
282 if(trace->type == e_trace_list) {
283 xbt_assert((trace_event->idx < xbt_dynar_length(trace->s_list.event_list)),
284 "You're referring to an event that does not exist!");
287 xbt_heap_push(h->heap, trace_event, start_time);
292 XBT_INLINE double tmgr_history_next_date(tmgr_history_t h)
294 if (xbt_heap_size(h->heap))
295 return (xbt_heap_maxkey(h->heap));
300 tmgr_trace_event_t tmgr_history_get_next_event_leq(tmgr_history_t h,
305 double event_date = tmgr_history_next_date(h);
306 tmgr_trace_event_t trace_event = NULL;
307 tmgr_event_t event = NULL;
308 tmgr_trace_t trace = NULL;
311 if (event_date > date)
314 if (!(trace_event = xbt_heap_pop(h->heap)))
317 trace = trace_event->trace;
318 *model = trace_event->model;
320 switch(trace->type) {
323 event = xbt_dynar_get_ptr(trace->s_list.event_list, trace_event->idx);
325 *value = event->value;
327 if (trace_event->idx < xbt_dynar_length(trace->s_list.event_list) - 1) {
328 xbt_heap_push(h->heap, trace_event, event_date + event->delta);
330 } else if (event->delta > 0) { /* Last element, checking for periodicity */
331 xbt_heap_push(h->heap, trace_event, event_date + event->delta);
332 trace_event->idx = 0;
333 } else { /* We don't need this trace_event anymore */
334 trace_event->free_me = 1;
338 case e_trace_probabilist:
340 //FIXME : not tested yet
341 if(trace->s_probabilist.is_state_trace) {
342 *value = (double) trace->s_probabilist.next_event;
343 if(trace->s_probabilist.next_event == 0) {
344 event_delta = tmgr_event_generator_next_value(trace->s_probabilist.event_generator[0]);
345 trace->s_probabilist.next_event = 0;
347 event_delta = tmgr_event_generator_next_value(trace->s_probabilist.event_generator[1]);
348 trace->s_probabilist.next_event = 1;
351 event_delta = tmgr_event_generator_next_value(trace->s_probabilist.event_generator[0]);
352 *value = tmgr_event_generator_next_value(trace->s_probabilist.event_generator[1]);
354 xbt_heap_push(h->heap, trace_event, event_date + event_delta);
362 XBT_INLINE void tmgr_finalize(void)
364 xbt_dict_free(&trace_list);
367 int tmgr_trace_event_free(tmgr_trace_event_t trace_event)
369 if (trace_event->free_me) {
370 xbt_free(trace_event);