1 /* Copyright (c) 2004-2015. 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 /* \file callbacks.h */
9 #include "xbt/sysdep.h"
11 #include "xbt/mallocator.h"
12 #include "maxmin_private.hpp"
14 #include <stdio.h> /* sprintf */
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_maxmin, surf,
17 "Logging specific to SURF (maxmin)");
19 typedef struct s_dyn_light {
23 } s_dyn_light_t, *dyn_light_t;
25 double sg_maxmin_precision = 0.00001;
26 double sg_surf_precision = 0.00001;
28 static void *lmm_variable_mallocator_new_f(void);
29 static void lmm_variable_mallocator_free_f(void *var);
30 #define lmm_variable_mallocator_reset_f ((void_f_pvoid_t)NULL)
31 static void lmm_update_modified_set(lmm_system_t sys,
32 lmm_constraint_t cnst);
33 static void lmm_remove_all_modified_set(lmm_system_t sys);
34 static int Global_debug_id = 1;
35 static int Global_const_debug_id = 1;
37 static void lmm_var_free(lmm_system_t sys, lmm_variable_t var);
38 static XBT_INLINE void lmm_cnst_free(lmm_system_t sys,
39 lmm_constraint_t cnst);
41 static void lmm_on_disabled_var(lmm_system_t sys, lmm_constraint_t cnstr);
42 static void lmm_enable_var(lmm_system_t sys, lmm_variable_t var);
43 static int lmm_can_enable_var(lmm_variable_t var);
44 static void lmm_disable_var(lmm_system_t sys, lmm_variable_t var);
45 static int lmm_concurrency_slack(lmm_constraint_t cnstr);
46 static int lmm_cnstrs_min_concurrency_slack(lmm_variable_t var);
48 static void lmm_check_concurrency(lmm_system_t sys);
50 inline int lmm_element_concurrency(lmm_element_t elem) {
51 //Ignore element with weight less than one (e.g. cross-traffic)
52 return (elem->value>=1)?1:0;
53 //There are other alternatives, but they will change the behaviour of the model..
54 //So do not use it unless you want to make a new model.
55 //If you do, remember to change the variables concurrency share to reflect it.
56 //Potential examples are:
57 //return (elem->weight>0)?1:0;//Include element as soon as weight is non-zero
58 //return (int)ceil(elem->weight);//Include element as the rounded-up integer value of the element weight
61 inline void lmm_decrease_concurrency(lmm_element_t elem) {
62 xbt_assert(elem->constraint->concurrency_current>=lmm_element_concurrency(elem));
63 elem->constraint->concurrency_current-=lmm_element_concurrency(elem);
66 inline void lmm_increase_concurrency(lmm_element_t elem) {
68 elem->constraint->concurrency_current+= lmm_element_concurrency(elem);
70 lmm_constraint_t cnstr=elem->constraint;
72 if(cnstr->concurrency_current > cnstr->concurrency_maximum)
73 cnstr->concurrency_maximum= cnstr->concurrency_current;
75 xbt_assert(cnstr->concurrency_limit<0 || cnstr->concurrency_current<=cnstr->concurrency_limit,"Concurrency limit overflow!");
78 lmm_system_t lmm_system_new(int selective_update)
80 lmm_system_t l = NULL;
82 s_lmm_constraint_t cnst;
84 l = xbt_new0(s_lmm_system_t, 1);
87 l->selective_update_active = selective_update;
88 l->visited_counter = 1;
90 XBT_DEBUG("Setting selective_update_active flag to %d",
91 l->selective_update_active);
93 xbt_swag_init(&(l->variable_set),
94 xbt_swag_offset(var, variable_set_hookup));
95 xbt_swag_init(&(l->constraint_set),
96 xbt_swag_offset(cnst, constraint_set_hookup));
98 xbt_swag_init(&(l->active_constraint_set),
99 xbt_swag_offset(cnst, active_constraint_set_hookup));
101 xbt_swag_init(&(l->modified_constraint_set),
102 xbt_swag_offset(cnst, modified_constraint_set_hookup));
103 xbt_swag_init(&(l->saturated_variable_set),
104 xbt_swag_offset(var, saturated_variable_set_hookup));
105 xbt_swag_init(&(l->saturated_constraint_set),
106 xbt_swag_offset(cnst, saturated_constraint_set_hookup));
108 l->variable_mallocator = xbt_mallocator_new(65536,
109 lmm_variable_mallocator_new_f,
110 lmm_variable_mallocator_free_f,
111 lmm_variable_mallocator_reset_f);
116 void lmm_system_free(lmm_system_t sys)
118 lmm_variable_t var = NULL;
119 lmm_constraint_t cnst = NULL;
122 while ((var = (lmm_variable_t) extract_variable(sys))) {
124 ("Variable %p (%d) still in system when freing it: this may be a bug",
126 lmm_var_free(sys, var);
129 while ((cnst = (lmm_constraint_t) extract_constraint(sys)))
130 lmm_cnst_free(sys, cnst);
132 xbt_mallocator_free(sys->variable_mallocator);
136 static XBT_INLINE void lmm_variable_remove(lmm_system_t sys, lmm_variable_t var)
141 lmm_element_t elem = NULL;
143 XBT_IN("(sys=%p, var=%p)", sys, var);
146 //TODOLATER Can do better than that by leaving only the variable in only one enabled_element_set, call lmm_update_modified_set, and then remove it..
147 if(var->cnsts_number)
148 lmm_update_modified_set(sys, var->cnsts[0].constraint);
150 for (i = 0; i < var->cnsts_number; i++) {
151 elem = &var->cnsts[i];
153 lmm_decrease_concurrency(elem);
154 xbt_swag_remove(elem, &(elem->constraint->enabled_element_set));
155 xbt_swag_remove(elem, &(elem->constraint->disabled_element_set));
156 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
157 nelements=xbt_swag_size(&(elem->constraint->enabled_element_set)) +
158 xbt_swag_size(&(elem->constraint->disabled_element_set));
160 make_constraint_inactive(sys, elem->constraint);
162 lmm_on_disabled_var(sys,elem->constraint);
165 //Check if we can enable new variables going through the constraints where var was.
166 //Do it after removing all elements, so he first disabled variables get priority over those with smaller
168 for (i = 0; i < var->cnsts_number; i++) {
169 elem = &var->cnsts[i];
170 if(xbt_swag_size(&(elem->constraint->disabled_element_set)))
171 lmm_on_disabled_var(sys,elem->constraint);
174 var->cnsts_number = 0;
176 lmm_check_concurrency(sys);
181 static void lmm_var_free(lmm_system_t sys, lmm_variable_t var)
184 lmm_variable_remove(sys, var);
185 xbt_mallocator_release(sys->variable_mallocator, var);
188 static XBT_INLINE void lmm_cnst_free(lmm_system_t sys,
189 lmm_constraint_t cnst)
191 make_constraint_inactive(sys, cnst);
195 lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id,
198 lmm_constraint_t cnst = NULL;
199 s_lmm_element_t elem;
201 cnst = xbt_new0(s_lmm_constraint_t, 1);
203 cnst->id_int = Global_const_debug_id++;
204 xbt_swag_init(&(cnst->enabled_element_set),
205 xbt_swag_offset(elem, enabled_element_set_hookup));
206 xbt_swag_init(&(cnst->disabled_element_set),
207 xbt_swag_offset(elem, disabled_element_set_hookup));
208 xbt_swag_init(&(cnst->active_element_set),
209 xbt_swag_offset(elem, active_element_set_hookup));
211 cnst->bound = bound_value;
212 cnst->concurrency_maximum=0;
213 cnst->concurrency_current=0;
214 //TODO MARTIN Maybe a configuration item for the default cap concurrency?
215 cnst->concurrency_limit=100;
217 cnst->sharing_policy = 1; /* FIXME: don't hardcode the value */
218 insert_constraint(sys, cnst);
223 int lmm_constraint_concurrency_limit_get(lmm_constraint_t cnst)
225 return cnst->concurrency_limit;
228 void lmm_constraint_concurrency_limit_set(lmm_constraint_t cnst, int concurrency_limit)
230 xbt_assert(concurrency_limit<0 || cnst->concurrency_maximum<=concurrency_limit,"New concurrency limit should be larger than observed concurrency maximum. Maybe you want to call lmm_constraint_concurrency_maximum_reset() to reset the maximum?");
231 cnst->concurrency_limit = concurrency_limit;
234 void lmm_constraint_concurrency_maximum_reset(lmm_constraint_t cnst)
236 cnst->concurrency_maximum = 0;
239 int lmm_constraint_concurrency_maximum_get(lmm_constraint_t cnst)
241 xbt_assert(cnst->concurrency_limit<0 || cnst->concurrency_maximum<=cnst->concurrency_limit,"Very bad: maximum observed concurrency is higher than limit. This is a bug of SURF, please report it.");
242 return cnst->concurrency_maximum;
245 void lmm_constraint_shared(lmm_constraint_t cnst)
247 cnst->sharing_policy = 0;
250 /** Return true if the constraint is shared, and false if it's FATPIPE */
251 int lmm_constraint_sharing_policy(lmm_constraint_t cnst)
253 return (cnst->sharing_policy);
256 /* @brief Remove a constraint
257 * Currently this is dead code, but it is exposed in maxmin.h
258 * Apparently, this call was designed assuming that constraint would no more have elements in it.
259 * If this is not the case, assertion will fail, and you need to add calls e.g. to lmm_shrink before effectively removing it.
261 XBT_INLINE void lmm_constraint_free(lmm_system_t sys,
262 lmm_constraint_t cnst)
264 xbt_assert(!xbt_swag_size(&(cnst->active_element_set)),"Removing constraint but it still has active elements");
265 xbt_assert(!xbt_swag_size(&(cnst->enabled_element_set)),"Removing constraint but it still has enabled elements");
266 xbt_assert(!xbt_swag_size(&(cnst->disabled_element_set)),"Removing constraint but it still has disabled elements");
267 remove_constraint(sys, cnst);
268 lmm_cnst_free(sys, cnst);
271 static void *lmm_variable_mallocator_new_f(void)
273 lmm_variable_t var = xbt_new(s_lmm_variable_t, 1);
274 var->cnsts = NULL; /* will be created by realloc */
278 static void lmm_variable_mallocator_free_f(void *var)
280 xbt_free(((lmm_variable_t) var)->cnsts);
284 lmm_variable_t lmm_variable_new(lmm_system_t sys, void *id,
286 double bound, int number_of_constraints)
288 lmm_variable_t var = NULL;
291 XBT_IN("(sys=%p, id=%p, weight=%f, bound=%f, num_cons =%d)",
292 sys, id, weight, bound, number_of_constraints);
294 var = (lmm_variable_t) xbt_mallocator_get(sys->variable_mallocator);
296 var->id_int = Global_debug_id++;
297 var->cnsts = (s_lmm_element_t *) xbt_realloc(var->cnsts, number_of_constraints * sizeof(s_lmm_element_t));
298 for (i = 0; i < number_of_constraints; i++) {
299 var->cnsts[i].enabled_element_set_hookup.next = NULL;
300 var->cnsts[i].enabled_element_set_hookup.prev = NULL;
301 var->cnsts[i].disabled_element_set_hookup.next = NULL;
302 var->cnsts[i].disabled_element_set_hookup.prev = NULL;
303 var->cnsts[i].active_element_set_hookup.next = NULL;
304 var->cnsts[i].active_element_set_hookup.prev = NULL;
305 var->cnsts[i].constraint = NULL;
306 var->cnsts[i].variable = NULL;
307 var->cnsts[i].value = 0.0;
309 var->cnsts_size = number_of_constraints;
310 var->cnsts_number = 0;
311 var->weight = weight;
312 var->staged_weight = 0.0;
314 var->concurrency_share = 1;
316 var->visited = sys->visited_counter - 1;
319 var->func_f = func_f_def;
320 var->func_fp = func_fp_def;
321 var->func_fpi = func_fpi_def;
323 var->variable_set_hookup.next = NULL;
324 var->variable_set_hookup.prev = NULL;
325 var->saturated_variable_set_hookup.next = NULL;
326 var->saturated_variable_set_hookup.prev = NULL;
329 xbt_swag_insert_at_head(var, &(sys->variable_set));
331 xbt_swag_insert_at_tail(var, &(sys->variable_set));
333 XBT_OUT(" returns %p", var);
337 void lmm_variable_free(lmm_system_t sys, lmm_variable_t var)
339 remove_variable(sys, var);
340 lmm_var_free(sys, var);
343 double lmm_variable_getvalue(lmm_variable_t var)
349 void lmm_variable_concurrency_share_set(lmm_variable_t var, short int concurrency_share)
351 var->concurrency_share=concurrency_share;
354 double lmm_variable_getbound(lmm_variable_t var)
359 void lmm_shrink(lmm_system_t sys, lmm_constraint_t cnst,
362 lmm_element_t elem = NULL;
366 for (i = 0; i < var->cnsts_number; i++) {
367 elem = &(var->cnsts[i]);
368 if (elem->constraint == cnst) {
375 XBT_DEBUG("cnst %p is not found in var %p", cnst, var);
381 XBT_DEBUG("remove elem(value %f, cnst %p, var %p) in var %p",
382 elem->value, elem->constraint, elem->variable, var);
384 /* We are going to change the constraint object and the variable object.
385 * Propagate this change to other objects. Calling here before removing variable from not active elements (inactive elements are not visited)
387 lmm_update_modified_set(sys, cnst);
388 //Useful in case var was already removed from the constraint
389 lmm_update_modified_set(sys, var->cnsts[0].constraint); // will look up enabled_element_set of this constraint, and then each var in the enabled_element_set, and each var->cnsts[i].
391 if(xbt_swag_remove(elem, &(elem->constraint->enabled_element_set)))
392 lmm_decrease_concurrency(elem);
394 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
395 elem->constraint = NULL;
396 elem->variable = NULL;
399 var->cnsts_number -= 1;
401 //No variable in this constraint -> make it inactive
402 if (xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set)) == 0)
403 make_constraint_inactive(sys, cnst);
405 //Check maxconcurrency to see if we can enable new variables
406 lmm_on_disabled_var(sys,elem->constraint);
409 lmm_check_concurrency(sys);
412 void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
413 lmm_variable_t var, double value)
415 lmm_element_t elem = NULL;
422 //Check if this variable already has an active element in this constraint
423 //If it does, substract it from the required slack
425 if(var->concurrency_share>1){
426 for( i=0; i<var->cnsts_number;i++){
427 if(var->cnsts[i].constraint==cnst && xbt_swag_belongs(&var->cnsts[i],&(var->cnsts[i].constraint->enabled_element_set)))
428 current_share+=lmm_element_concurrency(&(var->cnsts[i]));
432 //Check if we need to disable the variable
433 if(var->weight>0 && var->concurrency_share-current_share>lmm_concurrency_slack(cnst))
436 lmm_disable_var(sys,var);
437 for (i = 0; i < var->cnsts_number; i++)
438 lmm_on_disabled_var(sys,var->cnsts[i].constraint);
440 var->staged_weight=weight;
441 xbt_assert(!var->weight);
444 xbt_assert(var->cnsts_number < var->cnsts_size, "Too much constraints");
446 elem = &(var->cnsts[var->cnsts_number++]);
449 elem->constraint = cnst;
450 elem->variable = var;
454 xbt_swag_insert_at_head(elem, &(elem->constraint->enabled_element_set));
455 lmm_increase_concurrency(elem);
458 xbt_swag_insert_at_tail(elem, &(elem->constraint->disabled_element_set));
460 if(!sys->selective_update_active) {
461 make_constraint_active(sys, cnst);
462 } else if(elem->value>0 || var->weight >0) {
463 make_constraint_active(sys, cnst);
464 lmm_update_modified_set(sys, cnst);
465 //TODOLATER: Why do we need this second call?
466 if (var->cnsts_number > 1)
467 lmm_update_modified_set(sys, var->cnsts[0].constraint);
470 lmm_check_concurrency(sys);
473 void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst,
474 lmm_variable_t var, double value)
480 lmm_check_concurrency(sys);
482 //BEWARE: In case you have multiple elements in one constraint, this will always
483 //add value to the first element.
484 for (i = 0; i < var->cnsts_number; i++)
485 if (var->cnsts[i].constraint == cnst)
488 if (i < var->cnsts_number) {
490 lmm_decrease_concurrency(&var->cnsts[i]);
492 if (cnst->sharing_policy)
493 var->cnsts[i].value += value;
495 var->cnsts[i].value = MAX(var->cnsts[i].value, value);
497 //We need to check that increasing value of the element does not cross the concurrency limit
499 if(lmm_concurrency_slack(cnst)<lmm_element_concurrency(&var->cnsts[i])){
501 lmm_disable_var(sys,var);
502 for (j = 0; j < var->cnsts_number; j++)
503 lmm_on_disabled_var(sys,var->cnsts[j].constraint);
504 var->staged_weight=weight;
505 xbt_assert(!var->weight);
507 lmm_increase_concurrency(&var->cnsts[i]);
510 lmm_update_modified_set(sys, cnst);
512 lmm_expand(sys, cnst, var, value);
514 lmm_check_concurrency(sys);
517 lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t /*sys*/,
521 if (num < var->cnsts_number)
522 return (var->cnsts[num].constraint);
527 double lmm_get_cnst_weight_from_var(lmm_system_t /*sys*/,
531 if (num < var->cnsts_number)
532 return (var->cnsts[num].value);
537 int lmm_get_number_of_cnst_from_var(lmm_system_t /*sys*/,
540 return (var->cnsts_number);
543 lmm_variable_t lmm_get_var_from_cnst(lmm_system_t /*sys*/,
544 lmm_constraint_t cnst,
545 lmm_element_t * elem)
549 //That is the first call, pick the first element among enabled_element_set (or disabled_element_set if enabled_element_set is empty)
550 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
552 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
554 //elem is not null, so we carry on
555 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
556 //Look at enabled_element_set, and jump to disabled_element_set when finished
557 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
559 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
561 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
565 return (*elem)->variable;
570 //if we modify the swag between calls, normal version may loop forever
571 //this safe version ensures that we browse the swag elements only once
572 lmm_variable_t lmm_get_var_from_cnst_safe(lmm_system_t /*sys*/,
573 lmm_constraint_t cnst,
574 lmm_element_t * elem,
575 lmm_element_t * nextelem,
579 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
580 *numelem = xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set))-1;
582 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
591 //elem is not null, so we carry on
592 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
593 //Look at enabled_element_set, and jump to disabled_element_set when finished
594 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
596 *nextelem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
598 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
600 return (*elem)->variable;
605 void *lmm_constraint_id(lmm_constraint_t cnst)
610 void *lmm_variable_id(lmm_variable_t var)
615 static XBT_INLINE void saturated_constraint_set_update(double usage,
617 dyn_light_t saturated_constraint_set,
620 xbt_assert(usage > 0,"Impossible");
622 if (*min_usage < 0 || *min_usage > usage) {
624 XBT_HERE(" min_usage=%f (cnst->remaining / cnst->usage =%f)", *min_usage, usage);
625 saturated_constraint_set->data[0] = cnst_light_num;
626 saturated_constraint_set->pos = 1;
627 } else if (*min_usage == usage) {
628 if(saturated_constraint_set->pos == saturated_constraint_set->size) { // realloc the size
629 saturated_constraint_set->size *= 2;
630 saturated_constraint_set->data = (int*) xbt_realloc(saturated_constraint_set->data, (saturated_constraint_set->size) * sizeof(int));
632 saturated_constraint_set->data[saturated_constraint_set->pos] = cnst_light_num;
633 saturated_constraint_set->pos++;
637 static XBT_INLINE void saturated_variable_set_update(
638 s_lmm_constraint_light_t *cnst_light_tab,
639 dyn_light_t saturated_constraint_set,
642 /* Add active variables (i.e. variables that need to be set) from the set of constraints to saturate (cnst_light_tab)*/
643 lmm_constraint_light_t cnst = NULL;
645 lmm_element_t elem = NULL;
646 xbt_swag_t elem_list = NULL;
648 for(i = 0; i< saturated_constraint_set->pos; i++){
649 cnst = &cnst_light_tab[saturated_constraint_set->data[i]];
650 elem_list = &(cnst->cnst->active_element_set);
651 xbt_swag_foreach(_elem, elem_list) {
652 elem = (lmm_element_t)_elem;
653 //Visiting active_element_set, so, by construction, should never get a zero weight, correct?
654 xbt_assert(elem->variable->weight > 0);
655 if ((elem->value > 0))
656 xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
661 void lmm_print(lmm_system_t sys)
663 void *_cnst, *_elem, *_var;
664 lmm_constraint_t cnst = NULL;
665 lmm_element_t elem = NULL;
666 lmm_variable_t var = NULL;
667 xbt_swag_t cnst_list = NULL;
668 xbt_swag_t var_list = NULL;
669 xbt_swag_t elem_list = NULL;
670 char print_buf[1024];
671 char *trace_buf = (char*) xbt_malloc0(sizeof(char));
674 /* Printing Objective */
675 var_list = &(sys->variable_set);
676 sprintf(print_buf, "MAX-MIN ( ");
678 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
679 strcat(trace_buf, print_buf);
680 xbt_swag_foreach(_var, var_list) {
681 var = (lmm_variable_t)_var;
682 sprintf(print_buf, "'%d'(%f) ", var->id_int, var->weight);
684 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
685 strcat(trace_buf, print_buf);
687 sprintf(print_buf, ")");
689 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
690 strcat(trace_buf, print_buf);
691 XBT_DEBUG("%20s", trace_buf);
692 trace_buf[0] = '\000';
694 XBT_DEBUG("Constraints");
695 /* Printing Constraints */
696 cnst_list = &(sys->active_constraint_set);
697 xbt_swag_foreach(_cnst, cnst_list) {
698 cnst = (lmm_constraint_t)_cnst;
700 //Show the enabled variables
701 elem_list = &(cnst->enabled_element_set);
702 sprintf(print_buf, "\t");
704 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
705 strcat(trace_buf, print_buf);
706 sprintf(print_buf, "%s(",(cnst->sharing_policy)?"":"max");
708 xbt_realloc(trace_buf,
709 strlen(trace_buf) + strlen(print_buf) + 1);
710 strcat(trace_buf, print_buf);
711 xbt_swag_foreach(_elem, elem_list) {
712 elem = (lmm_element_t)_elem;
713 sprintf(print_buf, "%f.'%d'(%f) %s ", elem->value,
714 elem->variable->id_int, elem->variable->value,(cnst->sharing_policy)?"+":",");
716 xbt_realloc(trace_buf,
717 strlen(trace_buf) + strlen(print_buf) + 1);
718 strcat(trace_buf, print_buf);
719 if(cnst->sharing_policy)
720 sum += elem->value * elem->variable->value;
722 sum = MAX(sum,elem->value * elem->variable->value);
724 //TODO: Adding disabled elements only for test compatibility, but do we really want them to be printed?
725 elem_list = &(cnst->disabled_element_set);
726 xbt_swag_foreach(_elem, elem_list) {
727 elem = (lmm_element_t)_elem;
728 sprintf(print_buf, "%f.'%d'(%f) %s ", elem->value,
729 elem->variable->id_int, elem->variable->value,(cnst->sharing_policy)?"+":",");
731 xbt_realloc(trace_buf,
732 strlen(trace_buf) + strlen(print_buf) + 1);
733 strcat(trace_buf, print_buf);
734 if(cnst->sharing_policy)
735 sum += elem->value * elem->variable->value;
737 sum = MAX(sum,elem->value * elem->variable->value);
740 sprintf(print_buf, "0) <= %f ('%d')", cnst->bound, cnst->id_int);
742 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
743 strcat(trace_buf, print_buf);
745 if (!cnst->sharing_policy) {
746 sprintf(print_buf, " [MAX-Constraint]");
748 xbt_realloc(trace_buf,
749 strlen(trace_buf) + strlen(print_buf) + 1);
750 strcat(trace_buf, print_buf);
752 XBT_DEBUG("%s", trace_buf);
753 trace_buf[0] = '\000';
754 xbt_assert(!double_positive(sum - cnst->bound, cnst->bound*sg_maxmin_precision),
755 "Incorrect value (%f is not smaller than %f): %g",
756 sum, cnst->bound, sum - cnst->bound);
757 //if(double_positive(sum - cnst->bound, cnst->bound*sg_maxmin_precision))
758 //XBT_ERROR("Incorrect value (%f is not smaller than %f): %g",sum, cnst->bound, sum - cnst->bound);
762 XBT_DEBUG("Variables");
763 /* Printing Result */
764 xbt_swag_foreach(_var, var_list) {
765 var = (lmm_variable_t)_var;
766 if (var->bound > 0) {
767 XBT_DEBUG("'%d'(%f) : %f (<=%f)", var->id_int, var->weight, var->value,
769 xbt_assert(!double_positive(var->value - var->bound, var->bound*sg_maxmin_precision),
770 "Incorrect value (%f is not smaller than %f",
771 var->value, var->bound);
773 XBT_DEBUG("'%d'(%f) : %f", var->id_int, var->weight, var->value);
780 void lmm_solve(lmm_system_t sys)
782 void *_var, *_cnst, *_cnst_next, *_elem;
783 lmm_variable_t var = NULL;
784 lmm_constraint_t cnst = NULL;
785 lmm_element_t elem = NULL;
786 xbt_swag_t cnst_list = NULL;
787 xbt_swag_t var_list = NULL;
788 xbt_swag_t elem_list = NULL;
789 double min_usage = -1;
790 double min_bound = -1;
792 if (!(sys->modified))
795 XBT_IN("(sys=%p)", sys);
798 * Compute Usage and store the variables that reach the maximum. If selective_update_active is true, only constraints that changed are considered. Otherwise all constraints with active actions are considered.
802 selective_update_active ? &(sys->modified_constraint_set) :
803 &(sys->active_constraint_set);
805 XBT_DEBUG("Active constraints : %d", xbt_swag_size(cnst_list));
806 /* Init: Only modified code portions: reset the value of active variables */
807 xbt_swag_foreach(_cnst, cnst_list) {
808 cnst = (lmm_constraint_t)_cnst;
809 elem_list = &(cnst->enabled_element_set);
810 //XBT_DEBUG("Variable set : %d", xbt_swag_size(elem_list));
811 xbt_swag_foreach(_elem, elem_list) {
812 var = ((lmm_element_t)_elem)->variable;
813 xbt_assert(var->weight > 0.0);
818 s_lmm_constraint_light_t *cnst_light_tab = (s_lmm_constraint_light_t *)xbt_malloc0(xbt_swag_size(cnst_list)*sizeof(s_lmm_constraint_light_t));
819 int cnst_light_num = 0;
820 dyn_light_t saturated_constraint_set = xbt_new0(s_dyn_light_t,1);
821 saturated_constraint_set->size = 5;
822 saturated_constraint_set->data = xbt_new0(int, saturated_constraint_set->size);
824 xbt_swag_foreach_safe(_cnst, _cnst_next, cnst_list) {
825 cnst = (lmm_constraint_t)_cnst;
826 /* INIT: Collect constraints that actually need to be saturated (i.e remaining and usage are strictly positive) into cnst_light_tab. */
827 cnst->remaining = cnst->bound;
828 if (!double_positive(cnst->remaining, cnst->bound*sg_maxmin_precision))
831 elem_list = &(cnst->enabled_element_set);
832 xbt_swag_foreach(_elem, elem_list) {
833 elem = (lmm_element_t)_elem;
834 xbt_assert(elem->variable->weight > 0);
835 if ((elem->value > 0)) {
836 if (cnst->sharing_policy)
837 cnst->usage += elem->value / elem->variable->weight;
838 else if (cnst->usage < elem->value / elem->variable->weight)
839 cnst->usage = elem->value / elem->variable->weight;
841 make_elem_active(elem);
842 simgrid::surf::Action *action = static_cast<simgrid::surf::Action*>(elem->variable->id);
843 if (sys->keep_track && !action->is_linked())
844 sys->keep_track->push_back(*action);
847 XBT_DEBUG("Constraint '%d' usage: %f remaining: %f concurrency: %i<=%i<=%i", cnst->id_int, cnst->usage, cnst->remaining,cnst->concurrency_current,cnst->concurrency_maximum,cnst->concurrency_limit);
848 /* Saturated constraints update */
850 if(cnst->usage > 0) {
851 cnst_light_tab[cnst_light_num].cnst = cnst;
852 cnst->cnst_light = &(cnst_light_tab[cnst_light_num]);
853 cnst_light_tab[cnst_light_num].remaining_over_usage = cnst->remaining / cnst->usage;
854 saturated_constraint_set_update(cnst_light_tab[cnst_light_num].remaining_over_usage,
855 cnst_light_num, saturated_constraint_set, &min_usage);
856 xbt_assert(cnst->active_element_set.count>0, "There is no sense adding a constraint that has no active element!" );
861 saturated_variable_set_update( cnst_light_tab,
862 saturated_constraint_set,
865 /* Saturated variables update */
868 /* Fix the variables that have to be */
869 var_list = &(sys->saturated_variable_set);
871 xbt_swag_foreach(_var, var_list) {
872 var = (lmm_variable_t)_var;
873 if (var->weight <= 0.0)
875 /* First check if some of these variables could reach their upper
876 bound and update min_bound accordingly. */
878 ("var=%d, var->bound=%f, var->weight=%f, min_usage=%f, var->bound*var->weight=%f",
879 var->id_int, var->bound, var->weight, min_usage,
880 var->bound * var->weight);
881 if ((var->bound > 0) && (var->bound * var->weight < min_usage)) {
883 min_bound = var->bound*var->weight;
885 min_bound = MIN(min_bound, (var->bound*var->weight));
886 XBT_DEBUG("Updated min_bound=%f", min_bound);
891 while ((var = (lmm_variable_t)xbt_swag_getFirst(var_list))) {
895 //If no variable could reach its bound, deal iteratively the constraints usage ( at worst one constraint is saturated at each cycle)
896 var->value = min_usage / var->weight;
897 // XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
898 XBT_DEBUG("Setting var (%d) value to %f\n", var->id_int, var->value);
900 //If there exist a variable that can reach its bound, only update it (and other with the same bound) for now.
901 if (double_equals(min_bound, var->bound*var->weight, sg_maxmin_precision)){
902 var->value = var->bound;
903 XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
906 // Variables which bound is different are not considered for this cycle, but they will be afterwards.
907 XBT_DEBUG("Do not consider %p (%d) \n", var, var->id_int);
908 xbt_swag_remove(var, var_list);
912 XBT_DEBUG("Min usage: %f, Var(%d)->weight: %f, Var(%d)->value: %f ",
913 min_usage, var->id_int, var->weight, var->id_int, var->value);
916 /* Update the usage of contraints where this variable is involved */
917 for (i = 0; i < var->cnsts_number; i++) {
918 elem = &var->cnsts[i];
919 cnst = elem->constraint;
920 if (cnst->sharing_policy) {
921 //Remember: shared constraints require that sum(elem->value * var->value) < cnst->bound
922 double_update(&(cnst->remaining), elem->value * var->value, cnst->bound*sg_maxmin_precision);
923 double_update(&(cnst->usage), elem->value / var->weight, sg_maxmin_precision);
924 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
925 if(!double_positive(cnst->usage,sg_maxmin_precision) || !double_positive(cnst->remaining,cnst->bound*sg_maxmin_precision)) {
926 if (cnst->cnst_light) {
927 int index = (cnst->cnst_light-cnst_light_tab);
928 XBT_DEBUG("index: %d \t cnst_light_num: %d \t || usage: %f remaining: %f bound: %f ",
929 index,cnst_light_num, cnst->usage, cnst->remaining, cnst->bound);
930 // XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p \t cnst_light_tab: %p usage: %f remaining: %f bound: %f ",
931 //index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
932 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
933 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
935 cnst->cnst_light = NULL;
938 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
940 make_elem_inactive(elem);
942 //Remember: non-shared constraints only require that max(elem->value * var->value) < cnst->bound
944 make_elem_inactive(elem);
945 elem_list = &(cnst->enabled_element_set);
946 xbt_swag_foreach(_elem, elem_list) {
947 elem = (lmm_element_t)_elem;
948 xbt_assert(elem->variable->weight > 0);
949 if (elem->variable->value > 0) continue;
951 cnst->usage = MAX(cnst->usage, elem->value / elem->variable->weight);
953 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
954 if(!double_positive(cnst->usage,sg_maxmin_precision) || !double_positive(cnst->remaining,cnst->bound*sg_maxmin_precision)) {
955 if(cnst->cnst_light) {
956 int index = (cnst->cnst_light-cnst_light_tab);
957 XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p \t cnst_light_tab: %p usage: %f remaining: %f bound: %f ",
958 index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
959 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
960 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
962 cnst->cnst_light = NULL;
965 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
966 xbt_assert(cnst->active_element_set.count>0, "Should not keep a maximum constraint that has no active element! You want to check the maxmin precision and possible rounding effects." );
970 xbt_swag_remove(var, var_list);
973 /* Find out which variables reach the maximum */
976 saturated_constraint_set->pos = 0;
978 for(pos=0; pos<cnst_light_num; pos++){
979 xbt_assert(cnst_light_tab[pos].cnst->active_element_set.count>0, "Cannot saturate more a constraint that has no active element! You may want to change the maxmin precision (--cfg=maxmin/precision:<new_value>) because of possible rounding effects.\n\tFor the record, the usage of this constraint is %g while the maxmin precision to which it is compared is %g.\n\tThe usage of the previous constraint is %g.", cnst_light_tab[pos].cnst->usage, sg_maxmin_precision, cnst_light_tab[pos-1].cnst->usage);
980 saturated_constraint_set_update(
981 cnst_light_tab[pos].remaining_over_usage,
983 saturated_constraint_set,
987 saturated_variable_set_update( cnst_light_tab,
988 saturated_constraint_set,
991 } while (cnst_light_num > 0);
994 if (sys->selective_update_active)
995 lmm_remove_all_modified_set(sys);
997 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
1001 lmm_check_concurrency(sys);
1003 xbt_free(saturated_constraint_set->data);
1004 xbt_free(saturated_constraint_set);
1005 xbt_free(cnst_light_tab);
1010 /** \brief Attribute the value bound to var->bound.
1012 * \param sys the lmm_system_t
1013 * \param var the lmm_variable_t
1014 * \param bound the new bound to associate with var
1016 * Makes var->bound equal to bound. Whenever this function is called
1017 * a change is signed in the system. To
1018 * avoid false system changing detection it is a good idea to test
1019 * (bound != 0) before calling it.
1022 void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
1028 if (var->cnsts_number)
1029 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1034 int lmm_concurrency_slack(lmm_constraint_t cnstr){
1036 //FIXME MARTIN: Replace by infinite value std::numeric_limits<int>::(max)(), or something better within Simgrid?
1037 if(cnstr->concurrency_limit<0)
1040 return cnstr->concurrency_limit - cnstr->concurrency_current;
1043 /** \brief Measure the minimum concurrency slack across all constraints where var is involved
1045 * \param The variable to check for
1048 int lmm_cnstrs_min_concurrency_slack(lmm_variable_t var){
1050 //FIXME MARTIN: Replace by infinite value std::numeric_limits<int>::(max)(), or something better within Simgrid?
1051 int slack,minslack=666;
1052 for (i = 0; i < var->cnsts_number; i++) {
1053 slack=lmm_concurrency_slack(var->cnsts[i].constraint);
1055 //This is only an optimization, to avoid looking at more constraints when slack is already zero
1056 //Disable it when debugging to let lmm_concurrency_slack catch nasty things
1057 if(!slack && !XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug))
1067 /* /Check if a variable can be enabled
1069 * Make sure to set staged_weight before, if your intent is only to check concurrency
1071 int lmm_can_enable_var(lmm_variable_t var){
1072 return var->staged_weight>0 && lmm_cnstrs_min_concurrency_slack(var)>=var->concurrency_share;
1076 //Small remark: In this implementation of lmm_enable_var and lmm_disable_var, we will meet multiple times with var when running lmm_update_modified_set.
1077 //A priori not a big performance issue, but we might do better by calling lmm_update_modified_set within the for loops (after doing the first for enabling==1, and before doing the last for disabling==1)
1079 void lmm_enable_var(lmm_system_t sys, lmm_variable_t var){
1084 xbt_assert(lmm_can_enable_var(var));
1086 var->weight = var->staged_weight;
1087 var->staged_weight = 0;
1089 //Enabling the variable, move to var to list head. Subtility is: here, we need to call lmm_update_modified_set AFTER moving at least one element of var.
1091 xbt_swag_remove(var, &(sys->variable_set));
1092 xbt_swag_insert_at_head(var, &(sys->variable_set));
1093 for (i = 0; i < var->cnsts_number; i++) {
1094 elem = &var->cnsts[i];
1095 xbt_swag_remove(elem, &(elem->constraint->disabled_element_set));
1096 xbt_swag_insert_at_head(elem, &(elem->constraint->enabled_element_set));
1097 lmm_increase_concurrency(elem);
1099 if (var->cnsts_number)
1100 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1102 //When used within lmm_on_disabled_var, we would get an assertion fail, because transiently there can be variables that are staged and could be activated.
1103 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1104 // lmm_check_concurrency(sys);
1107 void lmm_disable_var(lmm_system_t sys, lmm_variable_t var){
1111 xbt_assert(!var->staged_weight,"Staged weight should have been cleared");
1112 //Disabling the variable, move to var to list tail. Subtility is: here, we need to call lmm_update_modified_set BEFORE moving the last element of var.
1113 xbt_swag_remove(var, &(sys->variable_set));
1114 xbt_swag_insert_at_tail(var, &(sys->variable_set));
1115 if (var->cnsts_number)
1116 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1117 for (i = 0; i < var->cnsts_number; i++) {
1118 elem = &var->cnsts[i];
1119 xbt_swag_remove(elem, &(elem->constraint->enabled_element_set));
1120 xbt_swag_insert_at_tail(elem, &(elem->constraint->disabled_element_set));
1122 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
1124 lmm_decrease_concurrency(elem);
1128 var->staged_weight=0.0;
1130 lmm_check_concurrency(sys);
1133 /* /brief Find variables that can be enabled and enable them.
1135 * Assuming that the variable has already been removed from non-zero weights
1136 * Can we find a staged variable to add?
1137 * If yes, check that none of the constraints that this variable is involved in is at the limit of its concurrency
1138 * And then add it to enabled variables
1140 void lmm_on_disabled_var(lmm_system_t sys, lmm_constraint_t cnstr){
1143 lmm_element_t nextelem;
1146 if(cnstr->concurrency_limit<0)
1149 numelem=xbt_swag_size(&(cnstr->disabled_element_set));
1153 elem= (lmm_element_t) xbt_swag_getFirst(&(cnstr->disabled_element_set));
1155 //Cannot use xbt_swag_foreach, because lmm_enable_var will modify disabled_element_set.. within the loop
1156 while(numelem-- && elem ){
1158 nextelem = (lmm_element_t) xbt_swag_getNext(elem, cnstr->disabled_element_set.offset);
1160 if (elem->variable->staged_weight>0 )
1162 //Found a staged variable
1163 //TODOLATER: Add random timing function to model reservation protocol fuzziness? Then how to make sure that staged variables will eventually be called?
1164 if(lmm_can_enable_var(elem->variable)){
1165 lmm_enable_var(sys,elem->variable);
1169 xbt_assert(cnstr->concurrency_current<=cnstr->concurrency_limit,"Concurrency overflow!");
1170 if(cnstr->concurrency_current==cnstr->concurrency_limit)
1176 //We could get an assertion fail, because transiently there can be variables that are staged and could be activated.
1177 //And we need to go through all constraints of the disabled var before getting back a coherent state.
1178 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1179 // lmm_check_concurrency(sys);
1183 /* \brief update the weight of a variable, and enable/disable it.
1184 * @return Returns whether a change was made
1186 void lmm_update_variable_weight(lmm_system_t sys, lmm_variable_t var,
1191 xbt_assert(weight>=0,"Variable weight should not be negative!");
1193 if (weight == var->weight)
1196 int enabling_var= (weight>0 && var->weight<=0);
1197 int disabling_var= (weight<=0 && var->weight>0);
1199 XBT_IN("(sys=%p, var=%p, weight=%f)", sys, var, weight);
1203 //Are we enabling this variable?
1205 var->staged_weight = weight;
1206 minslack=lmm_cnstrs_min_concurrency_slack(var);
1207 if(minslack<var->concurrency_share){
1208 XBT_DEBUG("Staging var (instead of enabling) because min concurrency slack %i, with weight %f and concurrency share %i", minslack, weight, var->concurrency_share);
1211 XBT_DEBUG("Enabling var with min concurrency slack %i", minslack);
1212 lmm_enable_var(sys,var);
1213 } else if (disabling_var){
1214 //Are we disabling this variable?
1215 lmm_disable_var(sys,var);
1220 lmm_check_concurrency(sys);
1226 double lmm_get_variable_weight(lmm_variable_t var)
1231 void lmm_update_constraint_bound(lmm_system_t sys,
1232 lmm_constraint_t cnst,
1236 lmm_update_modified_set(sys, cnst);
1237 cnst->bound = bound;
1240 int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
1242 return xbt_swag_belongs(cnst, &(sys->active_constraint_set));
1245 XBT_INLINE lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t
1248 return (lmm_constraint_t)xbt_swag_getFirst(&(sys->active_constraint_set));
1251 XBT_INLINE lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t
1256 return (lmm_constraint_t)xbt_swag_getNext(cnst, (sys->active_constraint_set).offset);
1259 #ifdef HAVE_LATENCY_BOUND_TRACKING
1260 XBT_PUBLIC(int) lmm_is_variable_limited_by_latency(lmm_variable_t var)
1262 return (double_equals(var->bound, var->value, var->bound*sg_maxmin_precision));
1267 /** \brief Update the constraint set propagating recursively to
1268 * other constraints so the system should not be entirely computed.
1270 * \param sys the lmm_system_t
1271 * \param cnst the lmm_constraint_t affected by the change
1273 * A recursive algorithm to optimize the system recalculation selecting only
1274 * constraints that have changed. Each constraint change is propagated
1275 * to the list of constraints for each variable.
1277 static void lmm_update_modified_set_rec(lmm_system_t sys,
1278 lmm_constraint_t cnst)
1282 //TODOLATER: Why lmm_modified_set has been changed in git version 2392B5157...? Looks equivalent logically and less obvious..
1284 xbt_swag_foreach(_elem, &cnst->enabled_element_set) {
1285 lmm_variable_t var = ((lmm_element_t)_elem)->variable;
1286 s_lmm_element_t *cnsts = var->cnsts;
1288 for (i = 0; var->visited != sys->visited_counter
1289 && i < var->cnsts_number ; i++) {
1290 if (cnsts[i].constraint != cnst
1291 && !xbt_swag_belongs(cnsts[i].constraint,
1292 &sys->modified_constraint_set)) {
1293 xbt_swag_insert(cnsts[i].constraint, &sys->modified_constraint_set);
1294 lmm_update_modified_set_rec(sys, cnsts[i].constraint);
1297 //var will be ignored in later visits as long as sys->visited_counter does not move
1298 var->visited = sys->visited_counter;
1302 static void lmm_update_modified_set(lmm_system_t sys,
1303 lmm_constraint_t cnst)
1305 /* nothing to do if selective update isn't active */
1306 if (sys->selective_update_active
1307 && !xbt_swag_belongs(cnst, &sys->modified_constraint_set)) {
1308 xbt_swag_insert(cnst, &sys->modified_constraint_set);
1309 lmm_update_modified_set_rec(sys, cnst);
1313 /** \brief Remove all constraints of the modified_constraint_set.
1315 * \param sys the lmm_system_t
1318 static void lmm_remove_all_modified_set(lmm_system_t sys)
1321 //We cleverly un-flag all variables just by incrementing sys->visited_counter
1322 //In effect, the var->visited value will no more be equal to sys->visited counter
1323 //To be clean, when visited counter has wrapped around, we force these var->visited values so that variables that were in the modified a long (long long) time ago are not wrongly skipped here, which would lead to very nasty bugs (i.e. not readibily reproducible, and requiring a lot of run time before happening).
1324 if (++sys->visited_counter == 1) {
1325 /* the counter wrapped around, reset each variable->visited */
1327 xbt_swag_foreach(_var, &sys->variable_set)
1328 ((lmm_variable_t)_var)->visited = 0;
1330 xbt_swag_reset(&sys->modified_constraint_set);
1334 * Returns total resource load
1336 * \param cnst the lmm_constraint_t associated to the resource
1339 * This is dead code, but we may use it later for debug/trace.
1341 double lmm_constraint_get_usage(lmm_constraint_t cnst) {
1343 xbt_swag_t elem_list = &(cnst->enabled_element_set);
1345 lmm_element_t elem = NULL;
1347 xbt_swag_foreach(_elem, elem_list) {
1348 elem = (lmm_element_t)_elem;
1349 if ((elem->value > 0)) {
1350 if (cnst->sharing_policy)
1351 usage += elem->value * elem->variable->value;
1352 else if (usage < elem->value * elem->variable->value)
1353 usage = elem->value * elem->variable->value;
1359 void lmm_check_concurrency(lmm_system_t sys){
1364 lmm_constraint_t cnst;
1367 int i,belong_to_enabled,belong_to_disabled,belong_to_active;
1369 //These checks are very expensive, so do them only if we want to debug SURF LMM
1370 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
1372 xbt_swag_foreach(_cnst, &(sys->constraint_set)) {
1373 cnst = (lmm_constraint_t) _cnst;
1375 xbt_swag_foreach(_elem, &(cnst->enabled_element_set)) {
1376 elem = (lmm_element_t)_elem;
1377 xbt_assert(elem->variable->weight > 0);
1378 concurrency+=lmm_element_concurrency(elem);
1381 xbt_swag_foreach(_elem, &(cnst->disabled_element_set)) {
1382 elem = (lmm_element_t)_elem;
1383 //We should have staged variables only if concurrency is reached in some constraint
1384 xbt_assert(cnst->concurrency_limit<0 || elem->variable->staged_weight==0 || lmm_cnstrs_min_concurrency_slack(elem->variable) < elem->variable->concurrency_share,"should not have staged variable!");
1387 xbt_assert(cnst->concurrency_limit<0 || cnst->concurrency_limit >= concurrency,"concurrency check failed!");
1388 xbt_assert(cnst->concurrency_current == concurrency, "concurrency_current is out-of-date!");
1392 //Check that for each variable, all corresponding elements are in the same state (i.e. same element sets)
1393 xbt_swag_foreach(_var, &(sys->variable_set)) {
1394 var= (lmm_variable_t) _var;
1396 if(!var->cnsts_number)
1399 elem = &var->cnsts[0];
1400 belong_to_enabled=xbt_swag_belongs(elem,&(elem->constraint->enabled_element_set));
1401 belong_to_disabled=xbt_swag_belongs(elem,&(elem->constraint->disabled_element_set));
1402 belong_to_active=xbt_swag_belongs(elem,&(elem->constraint->active_element_set));
1404 for (i = 1; i < var->cnsts_number; i++) {
1405 elem = &var->cnsts[i];
1406 xbt_assert(belong_to_enabled==xbt_swag_belongs(elem,&(elem->constraint->enabled_element_set)),
1407 "Variable inconsistency (1): enabled_element_set");
1408 xbt_assert(belong_to_disabled==xbt_swag_belongs(elem,&(elem->constraint->disabled_element_set)),
1409 "Variable inconsistency (2): disabled_element_set");
1410 xbt_assert(belong_to_active==xbt_swag_belongs(elem,&(elem->constraint->active_element_set)),
1411 "Variable inconsistency (3): active_element_set");