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remove the create_resource entry point in resource model APIs
[simgrid.git] / src / surf / cpu_ti.c
1
2 /* Copyright (c) 2009, 2010. The SimGrid Team.
3  * 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 /*
9   commit: e2d6799c4182f00443b3013aadb1c2412372460f
10   This commit retrieves the old implementation of CPU_TI with multi-levels.
11 */
12
13 #include "surf_private.h"
14 #include "trace_mgr_private.h"
15 #include "cpu_ti_private.h"
16 #include "xbt/heap.h"
17 #include "surf/surf_resource.h"
18
19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_ti, surf,
20                                 "Logging specific to the SURF CPU TRACE INTEGRATION module");
21
22
23 static xbt_swag_t
24     cpu_ti_running_action_set_that_does_not_need_being_checked = NULL;
25 static xbt_swag_t cpu_ti_modified_cpu = NULL;
26 static xbt_heap_t cpu_ti_action_heap;
27
28 /* prototypes of new trace functions */
29 static double surf_cpu_ti_integrate_trace(surf_cpu_ti_tgmr_t trace,
30                                           double a, double b);
31
32
33 static double surf_cpu_ti_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
34                                       double amount);
35 static double surf_cpu_ti_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t
36                                                       trace, double a,
37                                                       double amount);
38
39 static void surf_cpu_ti_free_tmgr(surf_cpu_ti_tgmr_t trace);
40
41 static double surf_cpu_ti_integrate_trace_simple(surf_cpu_ti_trace_t trace,
42                                                  double a, double b);
43 static double surf_cpu_ti_integrate_trace_simple_point(surf_cpu_ti_trace_t
44                                                        trace, double a);
45 static double surf_cpu_ti_solve_trace_simple(surf_cpu_ti_trace_t trace,
46                                              double a, double amount);
47 static int surf_cpu_ti_binary_search(double *array, double a, int low,
48                                      int high);
49 /* end prototypes */
50
51 static void surf_cpu_ti_free_trace(surf_cpu_ti_trace_t trace)
52 {
53   xbt_free(trace->time_points);
54   xbt_free(trace->integral);
55   xbt_free(trace);
56 }
57
58 static void surf_cpu_ti_free_tmgr(surf_cpu_ti_tgmr_t trace)
59 {
60   if (trace->trace)
61     surf_cpu_ti_free_trace(trace->trace);
62   xbt_free(trace);
63 }
64
65 static surf_cpu_ti_trace_t surf_cpu_ti_trace_new(tmgr_trace_t power_trace)
66 {
67   surf_cpu_ti_trace_t trace;
68   s_tmgr_event_t val;
69   unsigned int cpt;
70   double integral = 0;
71   double time = 0;
72   int i = 0;
73   trace = xbt_new0(s_surf_cpu_ti_trace_t, 1);
74   trace->time_points =
75       xbt_malloc0(sizeof(double) *
76                   (xbt_dynar_length(power_trace->s_list.event_list) + 1));
77   trace->integral =
78       xbt_malloc0(sizeof(double) *
79                   (xbt_dynar_length(power_trace->s_list.event_list) + 1));
80   trace->nb_points = xbt_dynar_length(power_trace->s_list.event_list);
81   xbt_dynar_foreach(power_trace->s_list.event_list, cpt, val) {
82     trace->time_points[i] = time;
83     trace->integral[i] = integral;
84     integral += val.delta * val.value;
85     time += val.delta;
86     i++;
87   }
88   trace->time_points[i] = time;
89   trace->integral[i] = integral;
90   return trace;
91 }
92
93 /**
94 * \brief Creates a new integration trace from a tmgr_trace_t
95 *
96 * \param  power_trace    CPU availability trace
97 * \param  value          Percentage of CPU power available (useful to fixed tracing)
98 * \param  spacing        Initial spacing
99 * \return  Integration trace structure
100 */
101 static surf_cpu_ti_tgmr_t cpu_ti_parse_trace(tmgr_trace_t power_trace,
102                                              double value)
103 {
104   surf_cpu_ti_tgmr_t trace;
105   double total_time = 0.0;
106   s_tmgr_event_t val;
107   unsigned int cpt;
108   trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
109
110 /* no availability file, fixed trace */
111   if (!power_trace) {
112     trace->type = TRACE_FIXED;
113     trace->value = value;
114     XBT_DEBUG("No availabily trace. Constant value = %lf", value);
115     return trace;
116   }
117
118   /* only one point available, fixed trace */
119   if (xbt_dynar_length(power_trace->s_list.event_list) == 1) {
120     xbt_dynar_get_cpy(power_trace->s_list.event_list, 0, &val);
121     trace->type = TRACE_FIXED;
122     trace->value = val.value;
123     return trace;
124   }
125
126   trace->type = TRACE_DYNAMIC;
127   trace->power_trace = power_trace;
128
129   /* count the total time of trace file */
130   xbt_dynar_foreach(power_trace->s_list.event_list, cpt, val) {
131     total_time += val.delta;
132   }
133   trace->trace = surf_cpu_ti_trace_new(power_trace);
134   trace->last_time = total_time;
135   trace->total =
136       surf_cpu_ti_integrate_trace_simple(trace->trace, 0, total_time);
137
138   XBT_DEBUG("Total integral %lf, last_time %lf ",
139          trace->total, trace->last_time);
140
141   return trace;
142 }
143
144
145 static void* cpu_ti_create_resource(const char *name, double power_peak,
146                            double power_scale,
147                            tmgr_trace_t power_trace,
148                            int core,
149                            e_surf_resource_state_t state_initial,
150                            tmgr_trace_t state_trace,
151                            xbt_dict_t cpu_properties)
152 {
153   tmgr_trace_t empty_trace;
154   s_tmgr_event_t val;
155   cpu_ti_t cpu = NULL;
156   s_surf_action_cpu_ti_t ti_action;
157   xbt_assert(core==1,"Multi-core not handled with this model yet");
158   xbt_assert(!surf_cpu_resource_by_name(name),
159               "Host '%s' declared several times in the platform file",
160               name);
161   xbt_assert(core==1,"Multi-core not handled with this model yet");
162   cpu = (cpu_ti_t) surf_resource_new(sizeof(s_cpu_ti_t),
163           surf_cpu_model, name,cpu_properties);
164   cpu->action_set =
165       xbt_swag_new(xbt_swag_offset(ti_action, cpu_list_hookup));
166   cpu->power_peak = power_peak;
167   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
168   XBT_DEBUG("power scale %lf", power_scale);
169   cpu->power_scale = power_scale;
170   cpu->avail_trace = cpu_ti_parse_trace(power_trace, power_scale);
171   cpu->state_current = state_initial;
172   if (state_trace)
173     cpu->state_event =
174         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
175   if (power_trace && xbt_dynar_length(power_trace->s_list.event_list) > 1) {
176     /* add a fake trace event if periodicity == 0 */
177     xbt_dynar_get_cpy(power_trace->s_list.event_list,
178                       xbt_dynar_length(power_trace->s_list.event_list) - 1, &val);
179     if (val.delta == 0) {
180       empty_trace = tmgr_empty_trace_new();
181       cpu->power_event =
182           tmgr_history_add_trace(history, empty_trace,
183                                  cpu->avail_trace->last_time, 0, cpu);
184     }
185   }
186   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
187
188   return cpu;
189 }
190
191
192 static void parse_cpu_ti_init(sg_platf_host_cbarg_t host)
193 {
194   cpu_ti_create_resource(host->id,
195         host->power_peak,
196         host->power_scale,
197         host->power_trace,
198         host->core_amount,
199         host->initial_state,
200         host->state_trace,
201         host->properties);
202
203 }
204
205 static void add_traces_cpu_ti(void)
206 {
207   xbt_dict_cursor_t cursor = NULL;
208   char *trace_name, *elm;
209
210   static int called = 0;
211
212   if (called)
213     return;
214   called = 1;
215
216 /* connect all traces relative to hosts */
217   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
218     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
219     cpu_ti_t cpu = surf_cpu_resource_by_name(elm);
220
221     xbt_assert(cpu, "Host %s undefined", elm);
222     xbt_assert(trace, "Trace %s undefined", trace_name);
223
224     if (cpu->state_event) {
225       XBT_DEBUG("Trace already configured for this CPU(%s), ignoring it",
226              elm);
227       continue;
228     }
229     XBT_DEBUG("Add state trace: %s to CPU(%s)", trace_name, elm);
230     cpu->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, cpu);
231   }
232
233   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
234     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
235     cpu_ti_t cpu = surf_cpu_resource_by_name(elm);
236
237     xbt_assert(cpu, "Host %s undefined", elm);
238     xbt_assert(trace, "Trace %s undefined", trace_name);
239
240     XBT_DEBUG("Add power trace: %s to CPU(%s)", trace_name, elm);
241     if (cpu->avail_trace)
242       surf_cpu_ti_free_tmgr(cpu->avail_trace);
243
244     cpu->avail_trace = cpu_ti_parse_trace(trace, cpu->power_scale);
245
246     /* add a fake trace event if periodicity == 0 */
247     if (trace && xbt_dynar_length(trace->s_list.event_list) > 1) {
248       s_tmgr_event_t val;
249       xbt_dynar_get_cpy(trace->s_list.event_list,
250                         xbt_dynar_length(trace->s_list.event_list) - 1, &val);
251       if (val.delta == 0) {
252         tmgr_trace_t empty_trace;
253         empty_trace = tmgr_empty_trace_new();
254         cpu->power_event =
255             tmgr_history_add_trace(history, empty_trace,
256                                    cpu->avail_trace->last_time, 0, cpu);
257       }
258     }
259   }
260 }
261
262 static void cpu_ti_define_callbacks()
263 {
264   sg_platf_host_add_cb(parse_cpu_ti_init);
265   sg_platf_postparse_add_cb(add_traces_cpu_ti);
266 }
267
268 static int cpu_ti_resource_used(void *resource_id)
269 {
270   cpu_ti_t cpu = resource_id;
271   return xbt_swag_size(cpu->action_set);
272 }
273
274 static int cpu_ti_action_unref(surf_action_t action)
275 {
276   action->refcount--;
277   if (!action->refcount) {
278     xbt_swag_remove(action, action->state_set);
279     /* remove from action_set */
280     xbt_swag_remove(action, ACTION_GET_CPU(action)->action_set);
281     /* remove from heap */
282     xbt_heap_remove(cpu_ti_action_heap,
283                     ((surf_action_cpu_ti_t) action)->index_heap);
284     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
285     surf_action_free(&action);
286     return 1;
287   }
288   return 0;
289 }
290
291 static void cpu_ti_action_cancel(surf_action_t action)
292 {
293   surf_action_state_set(action, SURF_ACTION_FAILED);
294   xbt_heap_remove(cpu_ti_action_heap,
295                   ((surf_action_cpu_ti_t) action)->index_heap);
296   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
297   return;
298 }
299
300 static void cpu_ti_action_state_set(surf_action_t action,
301                                     e_surf_action_state_t state)
302 {
303   surf_action_state_set(action, state);
304   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
305   return;
306 }
307
308 /**
309 * \brief Update the remaining amount of actions
310 *
311 * \param  cpu    Cpu on which the actions are running
312 * \param  now    Current time
313 */
314 static void cpu_ti_update_remaining_amount(cpu_ti_t cpu, double now)
315 {
316   double area_total;
317   surf_action_cpu_ti_t action;
318
319 /* already updated */
320   if (cpu->last_update >= now)
321     return;
322
323 /* calcule the surface */
324   area_total =
325       surf_cpu_ti_integrate_trace(cpu->avail_trace, cpu->last_update,
326                                   now) * cpu->power_peak;
327   XBT_DEBUG("Flops total: %lf, Last update %lf", area_total,
328          cpu->last_update);
329
330   xbt_swag_foreach(action, cpu->action_set) {
331     surf_action_t generic = (surf_action_t)action;
332     /* action not running, skip it */
333     if (generic->state_set !=
334         surf_cpu_model->states.running_action_set)
335       continue;
336
337     /* bogus priority, skip it */
338     if (generic->priority <= 0)
339       continue;
340
341     /* action suspended, skip it */
342     if (action->suspended != 0)
343       continue;
344
345     /* action don't need update */
346     if (generic->start >= now)
347       continue;
348
349     /* skip action that are finishing now */
350     if (generic->finish >= 0
351         && generic->finish <= now)
352       continue;
353
354     /* update remaining */
355     double_update(&(generic->remains),
356                   area_total / (cpu->sum_priority *
357                                 generic->priority));
358     XBT_DEBUG("Update remaining action(%p) remaining %lf", action,
359            generic->remains);
360   }
361   cpu->last_update = now;
362 #undef GENERIC_ACTION
363 }
364
365 /**
366 * \brief Update the finish date of action if necessary
367 *
368 * \param  cpu    Cpu on which the actions are running
369 * \param  now    Current time
370 */
371 static void cpu_ti_update_action_finish_date(cpu_ti_t cpu, double now)
372 {
373 #define GENERIC_ACTION(action) action->generic_action
374   surf_action_cpu_ti_t action;
375   double sum_priority = 0.0, total_area, min_finish = -1;
376
377 /* update remaning amount of actions */
378   cpu_ti_update_remaining_amount(cpu, now);
379
380   xbt_swag_foreach(action, cpu->action_set) {
381     /* action not running, skip it */
382     if (GENERIC_ACTION(action).state_set !=
383         surf_cpu_model->states.running_action_set)
384       continue;
385
386     /* bogus priority, skip it */
387     if (GENERIC_ACTION(action).priority <= 0)
388       continue;
389
390     /* action suspended, skip it */
391     if (action->suspended != 0)
392       continue;
393
394     sum_priority += 1.0 / GENERIC_ACTION(action).priority;
395   }
396   cpu->sum_priority = sum_priority;
397
398   xbt_swag_foreach(action, cpu->action_set) {
399     min_finish = -1;
400     /* action not running, skip it */
401     if (GENERIC_ACTION(action).state_set !=
402         surf_cpu_model->states.running_action_set)
403       continue;
404
405     /* verify if the action is really running on cpu */
406     if (action->suspended == 0 && GENERIC_ACTION(action).priority > 0) {
407       /* total area needed to finish the action. Used in trace integration */
408       total_area =
409           (GENERIC_ACTION(action).remains) * sum_priority *
410           GENERIC_ACTION(action).priority;
411
412       total_area /= cpu->power_peak;
413
414       GENERIC_ACTION(action).finish =
415           surf_cpu_ti_solve_trace(cpu->avail_trace, now, total_area);
416       /* verify which event will happen before (max_duration or finish time) */
417       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
418           (GENERIC_ACTION(action).start +
419            GENERIC_ACTION(action).max_duration <
420            GENERIC_ACTION(action).finish))
421         min_finish = GENERIC_ACTION(action).start +
422             GENERIC_ACTION(action).max_duration;
423       else
424         min_finish = GENERIC_ACTION(action).finish;
425     } else {
426       /* put the max duration time on heap */
427       if (GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
428         min_finish =
429             (GENERIC_ACTION(action).start +
430              GENERIC_ACTION(action).max_duration);
431     }
432     /* add in action heap */
433     XBT_DEBUG("action(%p) index %d", action, action->index_heap);
434     if (action->index_heap >= 0) {
435       surf_action_cpu_ti_t heap_act =
436           xbt_heap_remove(cpu_ti_action_heap, action->index_heap);
437       if (heap_act != action)
438         DIE_IMPOSSIBLE;
439     }
440     if (min_finish != NO_MAX_DURATION)
441       xbt_heap_push(cpu_ti_action_heap, action, min_finish);
442
443     XBT_DEBUG
444         ("Update finish time: Cpu(%s) Action: %p, Start Time: %lf Finish Time: %lf Max duration %lf",
445          cpu->generic_resource.name, action, GENERIC_ACTION(action).start,
446          GENERIC_ACTION(action).finish,
447          GENERIC_ACTION(action).max_duration);
448   }
449 /* remove from modified cpu */
450   xbt_swag_remove(cpu, cpu_ti_modified_cpu);
451 #undef GENERIC_ACTION
452 }
453
454 static double cpu_ti_share_resources(double now)
455 {
456   cpu_ti_t cpu, cpu_next;
457   double min_action_duration = -1;
458
459 /* iterates over modified cpus to update share resources */
460   xbt_swag_foreach_safe(cpu, cpu_next, cpu_ti_modified_cpu) {
461     cpu_ti_update_action_finish_date(cpu, now);
462   }
463 /* get the min next event if heap not empty */
464   if (xbt_heap_size(cpu_ti_action_heap) > 0)
465     min_action_duration = xbt_heap_maxkey(cpu_ti_action_heap) - now;
466
467   XBT_DEBUG("Share resources, min next event date: %lf", min_action_duration);
468
469   return min_action_duration;
470 }
471
472 static void cpu_ti_update_actions_state(double now, double delta)
473 {
474 #define GENERIC_ACTION(action) action->generic_action
475   surf_action_cpu_ti_t action;
476   while ((xbt_heap_size(cpu_ti_action_heap) > 0)
477          && (xbt_heap_maxkey(cpu_ti_action_heap) <= now)) {
478     action = xbt_heap_pop(cpu_ti_action_heap);
479     XBT_DEBUG("Action %p: finish", action);
480     GENERIC_ACTION(action).finish = surf_get_clock();
481     /* set the remains to 0 due to precision problems when updating the remaining amount */
482     GENERIC_ACTION(action).remains = 0;
483     cpu_ti_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
484     /* update remaining amout of all actions */
485     cpu_ti_update_remaining_amount(action->cpu, surf_get_clock());
486   }
487 #undef GENERIC_ACTION
488 }
489
490 static void cpu_ti_update_resource_state(void *id,
491                                          tmgr_trace_event_t event_type,
492                                          double value, double date)
493 {
494   cpu_ti_t cpu = id;
495   surf_action_cpu_ti_t action;
496
497   surf_watched_hosts();
498
499   if (event_type == cpu->power_event) {
500     tmgr_trace_t power_trace;
501     surf_cpu_ti_tgmr_t trace;
502     s_tmgr_event_t val;
503
504     XBT_DEBUG("Finish trace date: %lf value %lf date %lf", surf_get_clock(),
505            value, date);
506     /* update remaining of actions and put in modified cpu swag */
507     cpu_ti_update_remaining_amount(cpu, date);
508     xbt_swag_insert(cpu, cpu_ti_modified_cpu);
509
510     power_trace = cpu->avail_trace->power_trace;
511     xbt_dynar_get_cpy(power_trace->s_list.event_list,
512                       xbt_dynar_length(power_trace->s_list.event_list) - 1, &val);
513     /* free old trace */
514     surf_cpu_ti_free_tmgr(cpu->avail_trace);
515     cpu->power_scale = val.value;
516
517     trace = xbt_new0(s_surf_cpu_ti_tgmr_t, 1);
518     trace->type = TRACE_FIXED;
519     trace->value = val.value;
520     XBT_DEBUG("value %lf", val.value);
521
522     cpu->avail_trace = trace;
523
524     if (tmgr_trace_event_free(event_type))
525       cpu->power_event = NULL;
526
527   } else if (event_type == cpu->state_event) {
528     if (value > 0)
529       cpu->state_current = SURF_RESOURCE_ON;
530     else {
531       cpu->state_current = SURF_RESOURCE_OFF;
532
533       /* put all action running on cpu to failed */
534       xbt_swag_foreach(action, cpu->action_set) {
535         if (surf_action_state_get((surf_action_t) action) ==
536             SURF_ACTION_RUNNING
537             || surf_action_state_get((surf_action_t) action) ==
538             SURF_ACTION_READY
539             || surf_action_state_get((surf_action_t) action) ==
540             SURF_ACTION_NOT_IN_THE_SYSTEM) {
541           action->generic_action.finish = date;
542           cpu_ti_action_state_set((surf_action_t) action,
543                                   SURF_ACTION_FAILED);
544           if (action->index_heap >= 0) {
545             surf_action_cpu_ti_t heap_act =
546                 xbt_heap_remove(cpu_ti_action_heap, action->index_heap);
547             if (heap_act != action)
548               DIE_IMPOSSIBLE;
549           }
550         }
551       }
552     }
553     if (tmgr_trace_event_free(event_type))
554       cpu->state_event = NULL;
555   } else {
556     XBT_CRITICAL("Unknown event ! \n");
557     xbt_abort();
558   }
559
560   return;
561 }
562
563 static surf_action_t cpu_ti_execute(void *cpu, double size)
564 {
565   surf_action_cpu_ti_t action = NULL;
566   cpu_ti_t CPU = cpu;
567
568   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
569   action =
570       surf_action_new(sizeof(s_surf_action_cpu_ti_t), size, surf_cpu_model,
571                       CPU->state_current != SURF_RESOURCE_ON);
572   action->cpu = cpu;
573   action->index_heap = -1;
574
575   xbt_swag_insert(CPU, cpu_ti_modified_cpu);
576
577   xbt_swag_insert(action, CPU->action_set);
578
579   action->suspended = 0;        /* Should be useless because of the
580                                    calloc but it seems to help valgrind... */
581
582   XBT_OUT();
583   return (surf_action_t) action;
584 }
585
586 static void cpu_ti_action_update_index_heap(void *action, int i)
587 {
588   ((surf_action_cpu_ti_t) action)->index_heap = i;
589 }
590
591 static surf_action_t cpu_ti_action_sleep(void *cpu, double duration)
592 {
593   surf_action_cpu_ti_t action = NULL;
594
595   if (duration > 0)
596     duration = MAX(duration, MAXMIN_PRECISION);
597
598   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
599   action = (surf_action_cpu_ti_t) cpu_ti_execute(cpu, 1.0);
600   action->generic_action.max_duration = duration;
601   action->suspended = 2;
602   if (duration == NO_MAX_DURATION) {
603     /* Move to the *end* of the corresponding action set. This convention
604        is used to speed up update_resource_state  */
605     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
606     ((surf_action_t) action)->state_set =
607         cpu_ti_running_action_set_that_does_not_need_being_checked;
608     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
609   }
610   XBT_OUT();
611   return (surf_action_t) action;
612 }
613
614 static void cpu_ti_action_suspend(surf_action_t action)
615 {
616   XBT_IN("(%p)", action);
617   if (((surf_action_cpu_ti_t) action)->suspended != 2) {
618     ((surf_action_cpu_ti_t) action)->suspended = 1;
619     xbt_heap_remove(cpu_ti_action_heap,
620                     ((surf_action_cpu_ti_t) action)->index_heap);
621     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
622   }
623   XBT_OUT();
624 }
625
626 static void cpu_ti_action_resume(surf_action_t action)
627 {
628   XBT_IN("(%p)", action);
629   if (((surf_action_cpu_ti_t) action)->suspended != 2) {
630     ((surf_action_cpu_ti_t) action)->suspended = 0;
631     xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
632   }
633   XBT_OUT();
634 }
635
636 static int cpu_ti_action_is_suspended(surf_action_t action)
637 {
638   return (((surf_action_cpu_ti_t) action)->suspended == 1);
639 }
640
641 static void cpu_ti_action_set_max_duration(surf_action_t action,
642                                            double duration)
643 {
644   surf_action_cpu_ti_t ACT = (surf_action_cpu_ti_t) action;
645   double min_finish;
646
647   XBT_IN("(%p,%g)", action, duration);
648
649   action->max_duration = duration;
650
651   if (duration >= 0)
652     min_finish =
653         (action->start + action->max_duration) <
654         action->finish ? (action->start +
655                           action->max_duration) : action->finish;
656   else
657     min_finish = action->finish;
658
659 /* add in action heap */
660   if (ACT->index_heap >= 0) {
661     surf_action_cpu_ti_t heap_act =
662         xbt_heap_remove(cpu_ti_action_heap, ACT->index_heap);
663     if (heap_act != ACT)
664       DIE_IMPOSSIBLE;
665   }
666   xbt_heap_push(cpu_ti_action_heap, ACT, min_finish);
667
668   XBT_OUT();
669 }
670
671 static void cpu_ti_action_set_priority(surf_action_t action,
672                                        double priority)
673 {
674   XBT_IN("(%p,%g)", action, priority);
675   action->priority = priority;
676   xbt_swag_insert(ACTION_GET_CPU(action), cpu_ti_modified_cpu);
677   XBT_OUT();
678 }
679
680 static double cpu_ti_action_get_remains(surf_action_t action)
681 {
682   XBT_IN("(%p)", action);
683   cpu_ti_update_remaining_amount((cpu_ti_t)
684                                  ((surf_action_cpu_ti_t) action)->cpu,
685                                  surf_get_clock());
686   XBT_OUT();
687   return action->remains;
688 }
689
690 static e_surf_resource_state_t cpu_ti_get_state(void *cpu)
691 {
692   return ((cpu_ti_t) cpu)->state_current;
693 }
694
695 static double cpu_ti_get_speed(void *cpu, double load)
696 {
697   return load * (((cpu_ti_t) cpu)->power_peak);
698 }
699
700 /**
701 * \brief Auxiliary function to update the CPU power scale.
702 *
703 *  This function uses the trace structure to return the power scale at the determined time a.
704 * \param trace    Trace structure to search the updated power scale
705 * \param a        Time
706 * \return CPU power scale
707 */
708 static double surf_cpu_ti_get_power_scale(surf_cpu_ti_tgmr_t trace,
709                                           double a)
710 {
711   double reduced_a;
712   int point;
713   s_tmgr_event_t val;
714
715   reduced_a = a - floor(a / trace->last_time) * trace->last_time;
716   point =
717       surf_cpu_ti_binary_search(trace->trace->time_points, reduced_a, 0,
718                                 trace->trace->nb_points - 1);
719   xbt_dynar_get_cpy(trace->power_trace->s_list.event_list, point, &val);
720   return val.value;
721 }
722
723 static double cpu_ti_get_available_speed(void *cpu)
724 {
725   cpu_ti_t CPU = cpu;
726   CPU->power_scale =
727       surf_cpu_ti_get_power_scale(CPU->avail_trace, surf_get_clock());
728 /* number between 0 and 1 */
729   return CPU->power_scale;
730 }
731
732 static void cpu_ti_finalize(void)
733 {
734   void **cpu;
735   xbt_lib_cursor_t cursor;
736   char *key;
737
738   xbt_lib_foreach(host_lib, cursor, key, cpu){
739     if(cpu[SURF_CPU_LEVEL])
740     {
741         cpu_ti_t CPU = cpu[SURF_CPU_LEVEL];
742         xbt_swag_free(CPU->action_set);
743         surf_cpu_ti_free_tmgr(CPU->avail_trace);
744     }
745   }
746
747   surf_model_exit(surf_cpu_model);
748   surf_cpu_model = NULL;
749
750   xbt_swag_free
751       (cpu_ti_running_action_set_that_does_not_need_being_checked);
752   xbt_swag_free(cpu_ti_modified_cpu);
753   cpu_ti_running_action_set_that_does_not_need_being_checked = NULL;
754   xbt_heap_free(cpu_ti_action_heap);
755 }
756
757 static void surf_cpu_ti_model_init_internal(void)
758 {
759   s_surf_action_t action;
760   s_cpu_ti_t cpu;
761
762   surf_cpu_model = surf_model_init();
763
764   cpu_ti_running_action_set_that_does_not_need_being_checked =
765       xbt_swag_new(xbt_swag_offset(action, state_hookup));
766
767   cpu_ti_modified_cpu =
768       xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
769
770   surf_cpu_model->name = "cpu_ti";
771
772   surf_cpu_model->action_unref = cpu_ti_action_unref;
773   surf_cpu_model->action_cancel = cpu_ti_action_cancel;
774   surf_cpu_model->action_state_set = cpu_ti_action_state_set;
775
776   surf_cpu_model->model_private->resource_used = cpu_ti_resource_used;
777   surf_cpu_model->model_private->share_resources = cpu_ti_share_resources;
778   surf_cpu_model->model_private->update_actions_state =
779       cpu_ti_update_actions_state;
780   surf_cpu_model->model_private->update_resource_state =
781       cpu_ti_update_resource_state;
782   surf_cpu_model->model_private->finalize = cpu_ti_finalize;
783
784   surf_cpu_model->suspend = cpu_ti_action_suspend;
785   surf_cpu_model->resume = cpu_ti_action_resume;
786   surf_cpu_model->is_suspended = cpu_ti_action_is_suspended;
787   surf_cpu_model->set_max_duration = cpu_ti_action_set_max_duration;
788   surf_cpu_model->set_priority = cpu_ti_action_set_priority;
789   surf_cpu_model->get_remains = cpu_ti_action_get_remains;
790
791   surf_cpu_model->extension.cpu.execute = cpu_ti_execute;
792   surf_cpu_model->extension.cpu.sleep = cpu_ti_action_sleep;
793
794   surf_cpu_model->extension.cpu.get_state = cpu_ti_get_state;
795   surf_cpu_model->extension.cpu.get_speed = cpu_ti_get_speed;
796   surf_cpu_model->extension.cpu.get_available_speed =
797       cpu_ti_get_available_speed;
798   surf_cpu_model->extension.cpu.add_traces = add_traces_cpu_ti;
799
800   cpu_ti_action_heap = xbt_heap_new(8, NULL);
801   xbt_heap_set_update_callback(cpu_ti_action_heap,
802                                cpu_ti_action_update_index_heap);
803
804 }
805
806 void surf_cpu_model_init_ti()
807 {
808   xbt_assert(!surf_cpu_model,"CPU model already initialized. This should not happen.");
809   surf_cpu_ti_model_init_internal();
810   cpu_ti_define_callbacks();
811   xbt_dynar_push(model_list, &surf_cpu_model);
812 }
813
814
815 /**
816 * \brief Integrate trace
817 *
818 * Wrapper around surf_cpu_integrate_trace_simple() to get
819 * the cyclic effect.
820 *
821 * \param trace Trace structure.
822 * \param a      Begin of interval
823 * \param b      End of interval
824 * \return the integrate value. -1 if an error occurs.
825 */
826 static double surf_cpu_ti_integrate_trace(surf_cpu_ti_tgmr_t trace,
827                                           double a, double b)
828 {
829   double first_chunk;
830   double middle_chunk;
831   double last_chunk;
832   int a_index, b_index;
833
834   if ((a < 0.0) || (a > b)) {
835     XBT_CRITICAL
836         ("Error, invalid integration interval [%.2f,%.2f]. You probably have a task executing with negative computation amount. Check your code.",
837          a, b);
838     xbt_abort();
839   }
840   if (a == b)
841     return 0.0;
842
843   if (trace->type == TRACE_FIXED) {
844     return ((b - a) * trace->value);
845   }
846
847   if (ceil(a / trace->last_time) == a / trace->last_time)
848     a_index = 1 + (int) (ceil(a / trace->last_time));
849   else
850     a_index = (int) (ceil(a / trace->last_time));
851
852   b_index = (int) (floor(b / trace->last_time));
853
854   if (a_index > b_index) {      /* Same chunk */
855     return surf_cpu_ti_integrate_trace_simple(trace->trace,
856                                               a - (a_index -
857                                                    1) * trace->last_time,
858                                               b -
859                                               (b_index) *
860                                               trace->last_time);
861   }
862
863   first_chunk = surf_cpu_ti_integrate_trace_simple(trace->trace,
864                                                    a - (a_index -
865                                                         1) *
866                                                    trace->last_time,
867                                                    trace->last_time);
868   middle_chunk = (b_index - a_index) * trace->total;
869   last_chunk = surf_cpu_ti_integrate_trace_simple(trace->trace,
870                                                   0.0,
871                                                   b -
872                                                   (b_index) *
873                                                   trace->last_time);
874
875   XBT_DEBUG("first_chunk=%.2f  middle_chunk=%.2f  last_chunk=%.2f\n",
876          first_chunk, middle_chunk, last_chunk);
877
878   return (first_chunk + middle_chunk + last_chunk);
879 }
880
881 /**
882  * \brief Auxiliary function to calculate the integral between a and b.
883  *     It simply calculates the integral at point a and b and returns the difference 
884  *   between them.
885  * \param trace    Trace structure
886  * \param a        Initial point
887  * \param b  Final point
888  * \return  Integral
889 */
890 static double surf_cpu_ti_integrate_trace_simple(surf_cpu_ti_trace_t trace,
891                                                  double a, double b)
892 {
893   return surf_cpu_ti_integrate_trace_simple_point(trace,
894                                                   b) -
895       surf_cpu_ti_integrate_trace_simple_point(trace, a);
896 }
897
898 /**
899  * \brief Auxiliary function to calculate the integral at point a.
900  * \param trace    Trace structure
901  * \param a        point
902  * \return  Integral
903 */
904 static double surf_cpu_ti_integrate_trace_simple_point(surf_cpu_ti_trace_t
905                                                        trace, double a)
906 {
907   double integral = 0;
908   int ind;
909   double a_aux = a;
910   ind =
911       surf_cpu_ti_binary_search(trace->time_points, a, 0,
912                                 trace->nb_points - 1);
913   integral += trace->integral[ind];
914   XBT_DEBUG
915       ("a %lf ind %d integral %lf ind + 1 %lf ind %lf time +1 %lf time %lf",
916        a, ind, integral, trace->integral[ind + 1], trace->integral[ind],
917        trace->time_points[ind + 1], trace->time_points[ind]);
918   double_update(&a_aux, trace->time_points[ind]);
919   if (a_aux > 0)
920     integral +=
921         ((trace->integral[ind + 1] -
922           trace->integral[ind]) / (trace->time_points[ind + 1] -
923                                    trace->time_points[ind])) * (a -
924                                                                 trace->
925                                                                 time_points
926                                                                 [ind]);
927   XBT_DEBUG("Integral a %lf = %lf", a, integral);
928
929   return integral;
930 }
931
932 /**
933 * \brief Calculate the time needed to execute "amount" on cpu.
934 *
935 * Here, amount can span multiple trace periods
936 *
937 * \param trace   CPU trace structure
938 * \param a        Initial time
939 * \param amount  Amount to be executed
940 * \return  End time
941 */
942 static double surf_cpu_ti_solve_trace(surf_cpu_ti_tgmr_t trace, double a,
943                                       double amount)
944 {
945   int quotient;
946   double reduced_b;
947   double reduced_amount;
948   double reduced_a;
949   double b;
950
951 /* Fix very small negative numbers */
952   if ((a < 0.0) && (a > -EPSILON)) {
953     a = 0.0;
954   }
955   if ((amount < 0.0) && (amount > -EPSILON)) {
956     amount = 0.0;
957   }
958
959 /* Sanity checks */
960   if ((a < 0.0) || (amount < 0.0)) {
961     XBT_CRITICAL
962         ("Error, invalid parameters [a = %.2f, amount = %.2f]. You probably have a task executing with negative computation amount. Check your code.",
963          a, amount);
964     xbt_abort();
965   }
966
967 /* At this point, a and amount are positive */
968
969   if (amount < EPSILON)
970     return a;
971
972 /* Is the trace fixed ? */
973   if (trace->type == TRACE_FIXED) {
974     return (a + (amount / trace->value));
975   }
976
977   XBT_DEBUG("amount %lf total %lf", amount, trace->total);
978 /* Reduce the problem to one where amount <= trace_total */
979   quotient = (int) (floor(amount / trace->total));
980   reduced_amount = (trace->total) * ((amount / trace->total) -
981                                      floor(amount / trace->total));
982   reduced_a = a - (trace->last_time) * (int) (floor(a / trace->last_time));
983
984   XBT_DEBUG("Quotient: %d reduced_amount: %lf reduced_a: %lf", quotient,
985          reduced_amount, reduced_a);
986
987 /* Now solve for new_amount which is <= trace_total */
988 /*
989    fprintf(stderr,"reduced_a = %.2f\n",reduced_a);
990    fprintf(stderr,"reduced_amount = %.2f\n",reduced_amount);
991  */
992   reduced_b =
993       surf_cpu_ti_solve_trace_somewhat_simple(trace, reduced_a,
994                                               reduced_amount);
995
996 /* Re-map to the original b and amount */
997   b = (trace->last_time) * (int) (floor(a / trace->last_time)) +
998       (quotient * trace->last_time) + reduced_b;
999   return b;
1000 }
1001
1002 /**
1003 * \brief Auxiliary function to solve integral
1004 *
1005 * Here, amount is <= trace->total
1006 * and a <=trace->last_time
1007 *
1008 */
1009 static double surf_cpu_ti_solve_trace_somewhat_simple(surf_cpu_ti_tgmr_t
1010                                                       trace, double a,
1011                                                       double amount)
1012 {
1013   double amount_till_end;
1014   double b;
1015
1016   XBT_DEBUG("Solve integral: [%.2f, amount=%.2f]", a, amount);
1017   amount_till_end =
1018       surf_cpu_ti_integrate_trace(trace, a, trace->last_time);
1019 /*
1020    fprintf(stderr,"amount_till_end=%.2f\n",amount_till_end);
1021  */
1022
1023   if (amount_till_end > amount) {
1024     b = surf_cpu_ti_solve_trace_simple(trace->trace, a, amount);
1025   } else {
1026     b = trace->last_time +
1027         surf_cpu_ti_solve_trace_simple(trace->trace, 0.0,
1028                                        amount - amount_till_end);
1029   }
1030   return b;
1031 }
1032
1033 /**
1034  * \brief Auxiliary function to solve integral.
1035  *  It returns the date when the requested amount of flops is available
1036  * \param trace    Trace structure
1037  * \param a        Initial point
1038  * \param amount  Amount of flops 
1039  * \return The date when amount is available.
1040 */
1041 static double surf_cpu_ti_solve_trace_simple(surf_cpu_ti_trace_t trace,
1042                                              double a, double amount)
1043 {
1044   double integral_a;
1045   int ind;
1046   double time;
1047   integral_a = surf_cpu_ti_integrate_trace_simple_point(trace, a);
1048   ind =
1049       surf_cpu_ti_binary_search(trace->integral, integral_a + amount, 0,
1050                                 trace->nb_points - 1);
1051   time = trace->time_points[ind];
1052   time +=
1053       (integral_a + amount -
1054        trace->integral[ind]) / ((trace->integral[ind + 1] -
1055                                  trace->integral[ind]) /
1056                                 (trace->time_points[ind + 1] -
1057                                  trace->time_points[ind]));
1058
1059   return time;
1060 }
1061
1062 /**
1063  * \brief Binary search in array.
1064  *  It returns the first point of the interval in which "a" is. 
1065  * \param array    Array
1066  * \param a        Value to search
1067  * \param low     Low bound to search in array
1068  * \param high    Upper bound to search in array
1069  * \return Index of point
1070 */
1071 static int surf_cpu_ti_binary_search(double *array, double a, int low,
1072                                      int high)
1073 {
1074   xbt_assert(low < high, "Wrong parameters: low (%d) should be smaller than"
1075       " high (%d)", low, high);
1076
1077   int mid;
1078   do {
1079     mid = low + (high - low) / 2;
1080     XBT_DEBUG("a %lf low %d high %d mid %d value %lf", a, low, high, mid,
1081         array[mid]);
1082
1083     if (array[mid] > a)
1084       high = mid;
1085     else
1086       low = mid;
1087   }
1088   while (low < high - 1);
1089
1090   return low;
1091 }