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 "maxmin_private.hpp"
11 #include "xbt/mallocator.h"
12 #include "xbt/sysdep.h"
15 #include <stdio.h> /* sprintf */
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_maxmin, surf, "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; /* Change this with --cfg=maxmin/precision:VALUE */
26 double sg_surf_precision = 0.00001; /* Change this with --cfg=surf/precision:VALUE */
27 int sg_concurrency_limit = -1; /* Change this with --cfg=maxmin/concurrency-limit:VALUE */
29 static void *lmm_variable_mallocator_new_f();
30 static void lmm_variable_mallocator_free_f(void *var);
31 #define lmm_variable_mallocator_reset_f ((void_f_pvoid_t)nullptr)
32 static void lmm_update_modified_set(lmm_system_t sys, 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 inline void lmm_cnst_free(lmm_system_t sys, lmm_constraint_t cnst);
40 static void lmm_on_disabled_var(lmm_system_t sys, lmm_constraint_t cnstr);
41 static void lmm_enable_var(lmm_system_t sys, lmm_variable_t var);
42 static int lmm_can_enable_var(lmm_variable_t var);
43 static void lmm_disable_var(lmm_system_t sys, lmm_variable_t var);
44 static int lmm_concurrency_slack(lmm_constraint_t cnstr);
45 static int lmm_cnstrs_min_concurrency_slack(lmm_variable_t var);
47 static void lmm_check_concurrency(lmm_system_t sys);
49 inline int lmm_element_concurrency(lmm_element_t elem) {
50 //Ignore element with weight less than one (e.g. cross-traffic)
51 return (elem->value>=1)?1:0;
52 //There are other alternatives, but they will change the behaviour of the model..
53 //So do not use it unless you want to make a new model.
54 //If you do, remember to change the variables concurrency share to reflect it.
55 //Potential examples are:
56 //return (elem->weight>0)?1:0;//Include element as soon as weight is non-zero
57 //return (int)ceil(elem->weight);//Include element as the rounded-up integer value of the element weight
60 inline void lmm_decrease_concurrency(lmm_element_t elem) {
61 xbt_assert(elem->constraint->concurrency_current>=lmm_element_concurrency(elem));
62 elem->constraint->concurrency_current-=lmm_element_concurrency(elem);
65 inline void lmm_increase_concurrency(lmm_element_t elem) {
66 elem->constraint->concurrency_current+= lmm_element_concurrency(elem);
68 lmm_constraint_t cnstr=elem->constraint;
70 if(cnstr->concurrency_current > cnstr->concurrency_maximum)
71 cnstr->concurrency_maximum= cnstr->concurrency_current;
73 xbt_assert(cnstr->concurrency_limit<0 || cnstr->concurrency_current<=cnstr->concurrency_limit,
74 "Concurrency limit overflow!");
77 lmm_system_t lmm_system_new(bool selective_update)
79 lmm_system_t l = nullptr;
81 s_lmm_constraint_t cnst;
83 l = xbt_new0(s_lmm_system_t, 1);
86 l->selective_update_active = selective_update;
87 l->visited_counter = 1;
89 XBT_DEBUG("Setting selective_update_active flag to %d", l->selective_update_active);
91 xbt_swag_init(&(l->variable_set), xbt_swag_offset(var, variable_set_hookup));
92 xbt_swag_init(&(l->constraint_set), xbt_swag_offset(cnst, constraint_set_hookup));
94 xbt_swag_init(&(l->active_constraint_set), xbt_swag_offset(cnst, active_constraint_set_hookup));
96 xbt_swag_init(&(l->modified_constraint_set), xbt_swag_offset(cnst, modified_constraint_set_hookup));
97 xbt_swag_init(&(l->saturated_variable_set), xbt_swag_offset(var, saturated_variable_set_hookup));
98 xbt_swag_init(&(l->saturated_constraint_set), xbt_swag_offset(cnst, saturated_constraint_set_hookup));
100 l->variable_mallocator = xbt_mallocator_new(65536,
101 lmm_variable_mallocator_new_f,
102 lmm_variable_mallocator_free_f,
103 lmm_variable_mallocator_reset_f);
105 l->solve_fun = &lmm_solve;
110 void lmm_system_free(lmm_system_t sys)
112 lmm_variable_t var = nullptr;
113 lmm_constraint_t cnst = nullptr;
118 while ((var = (lmm_variable_t) extract_variable(sys))) {
120 char* demangled = abi::__cxa_demangle(typeid(*var->id).name(), 0, 0, &status);
122 XBT_WARN("Probable bug: a %s variable (#%d) not removed before the LMM system destruction.", demangled,
125 lmm_var_free(sys, var);
127 while ((cnst = (lmm_constraint_t) extract_constraint(sys)))
128 lmm_cnst_free(sys, cnst);
130 xbt_mallocator_free(sys->variable_mallocator);
134 static inline void lmm_variable_remove(lmm_system_t sys, lmm_variable_t var)
139 lmm_element_t elem = nullptr;
141 XBT_IN("(sys=%p, var=%p)", sys, var);
144 //TODOLATER Can do better than that by leaving only the variable in only one enabled_element_set, call
145 //lmm_update_modified_set, and then remove it..
146 if(var->cnsts_number)
147 lmm_update_modified_set(sys, var->cnsts[0].constraint);
149 for (i = 0; i < var->cnsts_number; i++) {
150 elem = &var->cnsts[i];
152 lmm_decrease_concurrency(elem);
153 xbt_swag_remove(elem, &(elem->constraint->enabled_element_set));
154 xbt_swag_remove(elem, &(elem->constraint->disabled_element_set));
155 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
156 nelements=xbt_swag_size(&(elem->constraint->enabled_element_set)) +
157 xbt_swag_size(&(elem->constraint->disabled_element_set));
159 make_constraint_inactive(sys, elem->constraint);
161 lmm_on_disabled_var(sys,elem->constraint);
164 //Check if we can enable new variables going through the constraints where var was.
165 //Do it after removing all elements, so he first disabled variables get priority over those with smaller requirement
166 for (i = 0; i < var->cnsts_number; i++) {
167 elem = &var->cnsts[i];
168 if(xbt_swag_size(&(elem->constraint->disabled_element_set)))
169 lmm_on_disabled_var(sys,elem->constraint);
172 var->cnsts_number = 0;
174 lmm_check_concurrency(sys);
179 static void lmm_var_free(lmm_system_t sys, lmm_variable_t var)
181 lmm_variable_remove(sys, var);
182 xbt_mallocator_release(sys->variable_mallocator, var);
185 static inline void lmm_cnst_free(lmm_system_t sys, lmm_constraint_t cnst)
187 make_constraint_inactive(sys, cnst);
191 lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id, double bound_value)
193 lmm_constraint_t cnst = nullptr;
194 s_lmm_element_t elem;
196 cnst = xbt_new0(s_lmm_constraint_t, 1);
198 cnst->id_int = Global_const_debug_id++;
199 xbt_swag_init(&(cnst->enabled_element_set), xbt_swag_offset(elem, enabled_element_set_hookup));
200 xbt_swag_init(&(cnst->disabled_element_set), xbt_swag_offset(elem, disabled_element_set_hookup));
201 xbt_swag_init(&(cnst->active_element_set), xbt_swag_offset(elem, active_element_set_hookup));
203 cnst->bound = bound_value;
204 cnst->concurrency_maximum=0;
205 cnst->concurrency_current=0;
206 cnst->concurrency_limit = sg_concurrency_limit;
208 cnst->sharing_policy = 1; /* FIXME: don't hardcode the value */
209 insert_constraint(sys, cnst);
214 int lmm_constraint_concurrency_limit_get(lmm_constraint_t cnst)
216 return cnst->concurrency_limit;
219 void lmm_constraint_concurrency_limit_set(lmm_constraint_t cnst, int concurrency_limit)
221 xbt_assert(concurrency_limit<0 || cnst->concurrency_maximum<=concurrency_limit,
222 "New concurrency limit should be larger than observed concurrency maximum. Maybe you want to call"
223 " lmm_constraint_concurrency_maximum_reset() to reset the maximum?");
224 cnst->concurrency_limit = concurrency_limit;
227 void lmm_constraint_concurrency_maximum_reset(lmm_constraint_t cnst)
229 cnst->concurrency_maximum = 0;
232 int lmm_constraint_concurrency_maximum_get(lmm_constraint_t cnst)
234 xbt_assert(cnst->concurrency_limit<0 || cnst->concurrency_maximum<=cnst->concurrency_limit,
235 "Very bad: maximum observed concurrency is higher than limit. This is a bug of SURF, please report it.");
236 return cnst->concurrency_maximum;
239 void lmm_constraint_shared(lmm_constraint_t cnst)
241 cnst->sharing_policy = 0;
244 /** Return true if the constraint is shared, and false if it's FATPIPE */
245 int lmm_constraint_sharing_policy(lmm_constraint_t cnst)
247 return (cnst->sharing_policy);
250 /* @brief Remove a constraint
251 * Currently this is dead code, but it is exposed in maxmin.h
252 * Apparently, this call was designed assuming that constraint would no more have elements in it.
253 * If not the case, assertion will fail, and you need to add calls e.g. to lmm_shrink before effectively removing it.
255 inline void lmm_constraint_free(lmm_system_t sys,lmm_constraint_t cnst)
257 xbt_assert(not xbt_swag_size(&(cnst->active_element_set)), "Removing constraint but it still has active elements");
258 xbt_assert(not xbt_swag_size(&(cnst->enabled_element_set)), "Removing constraint but it still has enabled elements");
259 xbt_assert(not xbt_swag_size(&(cnst->disabled_element_set)),
260 "Removing constraint but it still has disabled elements");
261 remove_constraint(sys, cnst);
262 lmm_cnst_free(sys, cnst);
265 static void *lmm_variable_mallocator_new_f()
267 lmm_variable_t var = xbt_new(s_lmm_variable_t, 1);
268 var->cnsts = nullptr; /* will be created by realloc */
272 static void lmm_variable_mallocator_free_f(void *var)
274 xbt_free(((lmm_variable_t) var)->cnsts);
278 lmm_variable_t lmm_variable_new(lmm_system_t sys, simgrid::surf::Action* id, double weight, double bound,
279 int number_of_constraints)
281 lmm_variable_t var = nullptr;
284 XBT_IN("(sys=%p, id=%p, weight=%f, bound=%f, num_cons =%d)", sys, id, weight, bound, number_of_constraints);
286 var = (lmm_variable_t) xbt_mallocator_get(sys->variable_mallocator);
288 var->id_int = Global_debug_id++;
289 var->cnsts = (s_lmm_element_t *) xbt_realloc(var->cnsts, number_of_constraints * sizeof(s_lmm_element_t));
290 for (i = 0; i < number_of_constraints; i++) {
291 var->cnsts[i].enabled_element_set_hookup.next = nullptr;
292 var->cnsts[i].enabled_element_set_hookup.prev = nullptr;
293 var->cnsts[i].disabled_element_set_hookup.next = nullptr;
294 var->cnsts[i].disabled_element_set_hookup.prev = nullptr;
295 var->cnsts[i].active_element_set_hookup.next = nullptr;
296 var->cnsts[i].active_element_set_hookup.prev = nullptr;
297 var->cnsts[i].constraint = nullptr;
298 var->cnsts[i].variable = nullptr;
299 var->cnsts[i].value = 0.0;
301 var->cnsts_size = number_of_constraints;
302 var->cnsts_number = 0;
303 var->weight = weight;
304 var->staged_weight = 0.0;
306 var->concurrency_share = 1;
308 var->visited = sys->visited_counter - 1;
311 var->func_f = func_f_def;
312 var->func_fp = func_fp_def;
313 var->func_fpi = func_fpi_def;
315 var->variable_set_hookup.next = nullptr;
316 var->variable_set_hookup.prev = nullptr;
317 var->saturated_variable_set_hookup.next = nullptr;
318 var->saturated_variable_set_hookup.prev = nullptr;
321 xbt_swag_insert_at_head(var, &(sys->variable_set));
323 xbt_swag_insert_at_tail(var, &(sys->variable_set));
325 XBT_OUT(" returns %p", var);
329 void lmm_variable_free(lmm_system_t sys, lmm_variable_t var)
331 remove_variable(sys, var);
332 lmm_var_free(sys, var);
335 double lmm_variable_getvalue(lmm_variable_t var)
340 void lmm_variable_concurrency_share_set(lmm_variable_t var, short int concurrency_share)
342 var->concurrency_share=concurrency_share;
345 double lmm_variable_getbound(lmm_variable_t var)
350 void lmm_shrink(lmm_system_t sys, lmm_constraint_t cnst, lmm_variable_t var)
352 lmm_element_t elem = nullptr;
356 for (i = 0; i < var->cnsts_number; i++) {
357 elem = &(var->cnsts[i]);
358 if (elem->constraint == cnst) {
365 XBT_DEBUG("cnst %p is not found in var %p", cnst, var);
371 XBT_DEBUG("remove elem(value %f, cnst %p, var %p) in var %p", elem->value, elem->constraint, elem->variable, var);
373 /* We are going to change the constraint object and the variable object.
374 * Propagate this change to other objects. Calling here before removing variable from not active elements
375 * (inactive elements are not visited)
377 lmm_update_modified_set(sys, cnst);
378 //Useful in case var was already removed from the constraint
379 lmm_update_modified_set(sys, var->cnsts[0].constraint); // will look up enabled_element_set of this constraint, and
380 //then each var in the enabled_element_set, and each var->cnsts[i].
382 if(xbt_swag_remove(elem, &(elem->constraint->enabled_element_set)))
383 lmm_decrease_concurrency(elem);
385 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
386 elem->constraint = nullptr;
387 elem->variable = nullptr;
390 var->cnsts_number -= 1;
392 //No variable in this constraint -> make it inactive
393 if (xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set)) == 0)
394 make_constraint_inactive(sys, cnst);
396 //Check maxconcurrency to see if we can enable new variables
397 lmm_on_disabled_var(sys,elem->constraint);
400 lmm_check_concurrency(sys);
403 void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst, lmm_variable_t var, double value)
405 lmm_element_t elem = nullptr;
411 //Check if this variable already has an active element in this constraint
412 //If it does, substract it from the required slack
414 if(var->concurrency_share>1){
415 for( i=0; i<var->cnsts_number;i++){
416 if(var->cnsts[i].constraint==cnst &&
417 xbt_swag_belongs(&var->cnsts[i],&(var->cnsts[i].constraint->enabled_element_set)))
418 current_share+=lmm_element_concurrency(&(var->cnsts[i]));
422 //Check if we need to disable the variable
423 if(var->weight>0 && var->concurrency_share-current_share>lmm_concurrency_slack(cnst)) {
425 lmm_disable_var(sys,var);
426 for (i = 0; i < var->cnsts_number; i++)
427 lmm_on_disabled_var(sys,var->cnsts[i].constraint);
429 var->staged_weight=weight;
430 xbt_assert(not var->weight);
433 xbt_assert(var->cnsts_number < var->cnsts_size, "Too much constraints");
435 elem = &(var->cnsts[var->cnsts_number++]);
438 elem->constraint = cnst;
439 elem->variable = var;
442 xbt_swag_insert_at_head(elem, &(elem->constraint->enabled_element_set));
443 lmm_increase_concurrency(elem);
445 xbt_swag_insert_at_tail(elem, &(elem->constraint->disabled_element_set));
447 if (not sys->selective_update_active) {
448 make_constraint_active(sys, cnst);
449 } else if(elem->value>0 || var->weight >0) {
450 make_constraint_active(sys, cnst);
451 lmm_update_modified_set(sys, cnst);
452 //TODOLATER: Why do we need this second call?
453 if (var->cnsts_number > 1)
454 lmm_update_modified_set(sys, var->cnsts[0].constraint);
457 lmm_check_concurrency(sys);
460 void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst, lmm_variable_t var, double value)
466 lmm_check_concurrency(sys);
468 //BEWARE: In case you have multiple elements in one constraint, this will always add value to the first element.
469 for (i = 0; i < var->cnsts_number; i++)
470 if (var->cnsts[i].constraint == cnst)
473 if (i < var->cnsts_number) {
475 lmm_decrease_concurrency(&var->cnsts[i]);
477 if (cnst->sharing_policy)
478 var->cnsts[i].value += value;
480 var->cnsts[i].value = MAX(var->cnsts[i].value, value);
482 //We need to check that increasing value of the element does not cross the concurrency limit
484 if(lmm_concurrency_slack(cnst)<lmm_element_concurrency(&var->cnsts[i])){
486 lmm_disable_var(sys,var);
487 for (j = 0; j < var->cnsts_number; j++)
488 lmm_on_disabled_var(sys,var->cnsts[j].constraint);
489 var->staged_weight=weight;
490 xbt_assert(not var->weight);
492 lmm_increase_concurrency(&var->cnsts[i]);
494 lmm_update_modified_set(sys, cnst);
496 lmm_expand(sys, cnst, var, value);
498 lmm_check_concurrency(sys);
501 lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t /*sys*/, lmm_variable_t var, int num)
503 if (num < var->cnsts_number)
504 return (var->cnsts[num].constraint);
509 double lmm_get_cnst_weight_from_var(lmm_system_t /*sys*/, lmm_variable_t var, int num)
511 if (num < var->cnsts_number)
512 return (var->cnsts[num].value);
517 int lmm_get_number_of_cnst_from_var(lmm_system_t /*sys*/, lmm_variable_t var)
519 return (var->cnsts_number);
522 lmm_variable_t lmm_get_var_from_cnst(lmm_system_t /*sys*/, lmm_constraint_t cnst, lmm_element_t * elem)
524 if (*elem == nullptr) {
525 // That is the first call, pick the first element among enabled_element_set (or disabled_element_set if
526 // enabled_element_set is empty)
527 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
528 if (*elem == nullptr)
529 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
531 //elem is not null, so we carry on
532 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
533 //Look at enabled_element_set, and jump to disabled_element_set when finished
534 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
535 if (*elem == nullptr)
536 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
538 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
542 return (*elem)->variable;
547 //if we modify the swag between calls, normal version may loop forever
548 //this safe version ensures that we browse the swag elements only once
549 lmm_variable_t lmm_get_var_from_cnst_safe(lmm_system_t /*sys*/, lmm_constraint_t cnst, lmm_element_t * elem,
550 lmm_element_t * nextelem, int * numelem)
552 if (*elem == nullptr) {
553 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
554 *numelem = xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set))-1;
555 if (*elem == nullptr)
556 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
565 //elem is not null, so we carry on
566 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
567 //Look at enabled_element_set, and jump to disabled_element_set when finished
568 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
569 if (*nextelem == nullptr)
570 *nextelem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
572 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
574 return (*elem)->variable;
579 void *lmm_constraint_id(lmm_constraint_t cnst)
584 void *lmm_variable_id(lmm_variable_t var)
589 static inline void saturated_constraint_set_update(double usage, int cnst_light_num,
590 dyn_light_t saturated_constraint_set, double *min_usage)
592 xbt_assert(usage > 0,"Impossible");
594 if (*min_usage < 0 || *min_usage > usage) {
596 XBT_HERE(" min_usage=%f (cnst->remaining / cnst->usage =%f)", *min_usage, usage);
597 saturated_constraint_set->data[0] = cnst_light_num;
598 saturated_constraint_set->pos = 1;
599 } else if (*min_usage == usage) {
600 if(saturated_constraint_set->pos == saturated_constraint_set->size) { // realloc the size
601 saturated_constraint_set->size *= 2;
602 saturated_constraint_set->data =
603 (int*) xbt_realloc(saturated_constraint_set->data, (saturated_constraint_set->size) * sizeof(int));
605 saturated_constraint_set->data[saturated_constraint_set->pos] = cnst_light_num;
606 saturated_constraint_set->pos++;
610 static inline void saturated_variable_set_update(s_lmm_constraint_light_t *cnst_light_tab,
611 dyn_light_t saturated_constraint_set, lmm_system_t sys)
613 /* Add active variables (i.e. variables that need to be set) from the set of constraints to saturate (cnst_light_tab)*/
614 lmm_constraint_light_t cnst = nullptr;
616 lmm_element_t elem = nullptr;
617 xbt_swag_t elem_list = nullptr;
619 for(i = 0; i< saturated_constraint_set->pos; i++){
620 cnst = &cnst_light_tab[saturated_constraint_set->data[i]];
621 elem_list = &(cnst->cnst->active_element_set);
622 xbt_swag_foreach(_elem, elem_list) {
623 elem = (lmm_element_t)_elem;
624 //Visiting active_element_set, so, by construction, should never get a zero weight, correct?
625 xbt_assert(elem->variable->weight > 0);
626 if ((elem->value > 0))
627 xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
632 void lmm_print(lmm_system_t sys)
637 lmm_constraint_t cnst = nullptr;
638 lmm_element_t elem = nullptr;
639 lmm_variable_t var = nullptr;
640 xbt_swag_t cnst_list = nullptr;
641 xbt_swag_t var_list = nullptr;
642 xbt_swag_t elem_list = nullptr;
643 std::string buf = std::string("MAX-MIN ( ");
646 /* Printing Objective */
647 var_list = &(sys->variable_set);
648 xbt_swag_foreach(_var, var_list) {
649 var = (lmm_variable_t)_var;
650 buf = buf + "'" + std::to_string(var->id_int) + "'(" + std::to_string(var->weight) + ") ";
653 XBT_DEBUG("%20s", buf.c_str());
656 XBT_DEBUG("Constraints");
657 /* Printing Constraints */
658 cnst_list = &(sys->active_constraint_set);
659 xbt_swag_foreach(_cnst, cnst_list) {
660 cnst = (lmm_constraint_t)_cnst;
662 //Show the enabled variables
663 elem_list = &(cnst->enabled_element_set);
665 buf += ((cnst->sharing_policy) ? "(" : "max(");
666 xbt_swag_foreach(_elem, elem_list) {
667 elem = (lmm_element_t)_elem;
668 buf = buf + std::to_string(elem->value) + ".'" + std::to_string(elem->variable->id_int) + "'(" +
669 std::to_string(elem->variable->value) + ")" + ((cnst->sharing_policy) ? " + " : " , ");
670 if(cnst->sharing_policy)
671 sum += elem->value * elem->variable->value;
673 sum = MAX(sum,elem->value * elem->variable->value);
675 //TODO: Adding disabled elements only for test compatibility, but do we really want them to be printed?
676 elem_list = &(cnst->disabled_element_set);
677 xbt_swag_foreach(_elem, elem_list) {
678 elem = (lmm_element_t)_elem;
679 buf = buf + std::to_string(elem->value) + ".'" + std::to_string(elem->variable->id_int) + "'(" +
680 std::to_string(elem->variable->value) + ")" + ((cnst->sharing_policy) ? " + " : " , ");
681 if(cnst->sharing_policy)
682 sum += elem->value * elem->variable->value;
684 sum = MAX(sum,elem->value * elem->variable->value);
687 buf = buf + "0) <= " + std::to_string(cnst->bound) + " ('" + std::to_string(cnst->id_int) + "')";
689 if (not cnst->sharing_policy) {
690 buf += " [MAX-Constraint]";
692 XBT_DEBUG("%s", buf.c_str());
694 xbt_assert(not double_positive(sum - cnst->bound, cnst->bound * sg_maxmin_precision),
695 "Incorrect value (%f is not smaller than %f): %g", sum, cnst->bound, sum - cnst->bound);
696 // if(double_positive(sum - cnst->bound, cnst->bound*sg_maxmin_precision))
697 // XBT_ERROR("Incorrect value (%f is not smaller than %f): %g",sum, cnst->bound, sum - cnst->bound);
700 XBT_DEBUG("Variables");
701 /* Printing Result */
702 xbt_swag_foreach(_var, var_list) {
703 var = (lmm_variable_t)_var;
704 if (var->bound > 0) {
705 XBT_DEBUG("'%d'(%f) : %f (<=%f)", var->id_int, var->weight, var->value, var->bound);
706 xbt_assert(not double_positive(var->value - var->bound, var->bound * sg_maxmin_precision),
707 "Incorrect value (%f is not smaller than %f", var->value, var->bound);
709 XBT_DEBUG("'%d'(%f) : %f", var->id_int, var->weight, var->value);
714 void lmm_solve(lmm_system_t sys)
716 void *_var, *_cnst, *_cnst_next, *_elem;
717 lmm_variable_t var = nullptr;
718 lmm_constraint_t cnst = nullptr;
719 lmm_element_t elem = nullptr;
720 xbt_swag_t cnst_list = nullptr;
721 xbt_swag_t var_list = nullptr;
722 xbt_swag_t elem_list = nullptr;
723 double min_usage = -1;
724 double min_bound = -1;
726 if (not sys->modified)
729 XBT_IN("(sys=%p)", sys);
731 /* Compute Usage and store the variables that reach the maximum. If selective_update_active is true, only constraints
732 * that changed are considered. Otherwise all constraints with active actions are considered.
734 cnst_list = sys->selective_update_active ? &(sys->modified_constraint_set) : &(sys->active_constraint_set);
736 XBT_DEBUG("Active constraints : %d", xbt_swag_size(cnst_list));
737 /* Init: Only modified code portions: reset the value of active variables */
738 xbt_swag_foreach(_cnst, cnst_list) {
739 cnst = (lmm_constraint_t)_cnst;
740 elem_list = &(cnst->enabled_element_set);
741 //XBT_DEBUG("Variable set : %d", xbt_swag_size(elem_list));
742 xbt_swag_foreach(_elem, elem_list) {
743 var = ((lmm_element_t)_elem)->variable;
744 xbt_assert(var->weight > 0.0);
749 s_lmm_constraint_light_t *cnst_light_tab =
750 (s_lmm_constraint_light_t *)xbt_malloc0(xbt_swag_size(cnst_list)*sizeof(s_lmm_constraint_light_t));
751 int cnst_light_num = 0;
752 dyn_light_t saturated_constraint_set = xbt_new0(s_dyn_light_t,1);
753 saturated_constraint_set->size = 5;
754 saturated_constraint_set->data = xbt_new0(int, saturated_constraint_set->size);
756 xbt_swag_foreach_safe(_cnst, _cnst_next, cnst_list) {
757 cnst = (lmm_constraint_t)_cnst;
758 /* INIT: Collect constraints that actually need to be saturated (i.e remaining and usage are strictly positive)
759 * into cnst_light_tab. */
760 cnst->remaining = cnst->bound;
761 if (not double_positive(cnst->remaining, cnst->bound * sg_maxmin_precision))
764 elem_list = &(cnst->enabled_element_set);
765 xbt_swag_foreach(_elem, elem_list) {
766 elem = (lmm_element_t)_elem;
767 xbt_assert(elem->variable->weight > 0);
768 if ((elem->value > 0)) {
769 if (cnst->sharing_policy)
770 cnst->usage += elem->value / elem->variable->weight;
771 else if (cnst->usage < elem->value / elem->variable->weight)
772 cnst->usage = elem->value / elem->variable->weight;
774 make_elem_active(elem);
775 simgrid::surf::Action *action = static_cast<simgrid::surf::Action*>(elem->variable->id);
776 if (sys->keep_track && not action->is_linked())
777 sys->keep_track->push_back(*action);
780 XBT_DEBUG("Constraint '%d' usage: %f remaining: %f concurrency: %i<=%i<=%i", cnst->id_int, cnst->usage,
781 cnst->remaining,cnst->concurrency_current,cnst->concurrency_maximum,cnst->concurrency_limit);
782 /* Saturated constraints update */
784 if(cnst->usage > 0) {
785 cnst_light_tab[cnst_light_num].cnst = cnst;
786 cnst->cnst_light = &(cnst_light_tab[cnst_light_num]);
787 cnst_light_tab[cnst_light_num].remaining_over_usage = cnst->remaining / cnst->usage;
788 saturated_constraint_set_update(cnst_light_tab[cnst_light_num].remaining_over_usage,
789 cnst_light_num, saturated_constraint_set, &min_usage);
790 xbt_assert(cnst->active_element_set.count>0, "There is no sense adding a constraint that has no active element!");
795 saturated_variable_set_update( cnst_light_tab, saturated_constraint_set, sys);
797 /* Saturated variables update */
799 /* Fix the variables that have to be */
800 var_list = &(sys->saturated_variable_set);
802 xbt_swag_foreach(_var, var_list) {
803 var = (lmm_variable_t)_var;
804 if (var->weight <= 0.0)
806 /* First check if some of these variables could reach their upper bound and update min_bound accordingly. */
808 ("var=%d, var->bound=%f, var->weight=%f, min_usage=%f, var->bound*var->weight=%f",
809 var->id_int, var->bound, var->weight, min_usage, var->bound * var->weight);
810 if ((var->bound > 0) && (var->bound * var->weight < min_usage)) {
812 min_bound = var->bound*var->weight;
814 min_bound = MIN(min_bound, (var->bound*var->weight));
815 XBT_DEBUG("Updated min_bound=%f", min_bound);
819 while ((var = (lmm_variable_t)xbt_swag_getFirst(var_list))) {
823 //If no variable could reach its bound, deal iteratively the constraints usage ( at worst one constraint is
824 // saturated at each cycle)
825 var->value = min_usage / var->weight;
826 // XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
827 XBT_DEBUG("Setting var (%d) value to %f\n", var->id_int, var->value);
829 //If there exist a variable that can reach its bound, only update it (and other with the same bound) for now.
830 if (double_equals(min_bound, var->bound*var->weight, sg_maxmin_precision)){
831 var->value = var->bound;
832 XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
834 // Variables which bound is different are not considered for this cycle, but they will be afterwards.
835 XBT_DEBUG("Do not consider %p (%d) \n", var, var->id_int);
836 xbt_swag_remove(var, var_list);
840 XBT_DEBUG("Min usage: %f, Var(%d)->weight: %f, Var(%d)->value: %f ",
841 min_usage, var->id_int, var->weight, var->id_int, var->value);
843 /* Update the usage of contraints where this variable is involved */
844 for (i = 0; i < var->cnsts_number; i++) {
845 elem = &var->cnsts[i];
846 cnst = elem->constraint;
847 if (cnst->sharing_policy) {
848 //Remember: shared constraints require that sum(elem->value * var->value) < cnst->bound
849 double_update(&(cnst->remaining), elem->value * var->value, cnst->bound*sg_maxmin_precision);
850 double_update(&(cnst->usage), elem->value / var->weight, sg_maxmin_precision);
851 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
852 if (not double_positive(cnst->usage, sg_maxmin_precision) ||
853 not double_positive(cnst->remaining, cnst->bound * sg_maxmin_precision)) {
854 if (cnst->cnst_light) {
855 int index = (cnst->cnst_light-cnst_light_tab);
856 XBT_DEBUG("index: %d \t cnst_light_num: %d \t || usage: %f remaining: %f bound: %f ",
857 index,cnst_light_num, cnst->usage, cnst->remaining, cnst->bound);
858 //XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p "
859 // "\t cnst_light_tab: %p usage: %f remaining: %f bound: %f ", index,cnst_light_num,
860 // cnst, cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
861 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
862 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
864 cnst->cnst_light = nullptr;
867 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
869 make_elem_inactive(elem);
871 //Remember: non-shared constraints only require that max(elem->value * var->value) < cnst->bound
873 make_elem_inactive(elem);
874 elem_list = &(cnst->enabled_element_set);
875 xbt_swag_foreach(_elem, elem_list) {
876 elem = (lmm_element_t)_elem;
877 xbt_assert(elem->variable->weight > 0);
878 if (elem->variable->value > 0) continue;
880 cnst->usage = MAX(cnst->usage, elem->value / elem->variable->weight);
882 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
883 if (not double_positive(cnst->usage, sg_maxmin_precision) ||
884 not double_positive(cnst->remaining, cnst->bound * sg_maxmin_precision)) {
885 if(cnst->cnst_light) {
886 int index = (cnst->cnst_light-cnst_light_tab);
887 XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p "
888 "\t cnst_light_tab: %p usage: %f remaining: %f bound: %f ", index,cnst_light_num, cnst,
889 cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
890 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
891 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
893 cnst->cnst_light = nullptr;
896 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
897 xbt_assert(cnst->active_element_set.count>0, "Should not keep a maximum constraint that has no active"
898 " element! You want to check the maxmin precision and possible rounding effects." );
902 xbt_swag_remove(var, var_list);
905 /* Find out which variables reach the maximum */
908 saturated_constraint_set->pos = 0;
910 for(pos=0; pos<cnst_light_num; pos++){
911 xbt_assert(cnst_light_tab[pos].cnst->active_element_set.count>0, "Cannot saturate more a constraint that has"
912 " no active element! You may want to change the maxmin precision (--cfg=maxmin/precision:<new_value>)"
913 " because of possible rounding effects.\n\tFor the record, the usage of this constraint is %g while "
914 "the maxmin precision to which it is compared is %g.\n\tThe usage of the previous constraint is %g.",
915 cnst_light_tab[pos].cnst->usage, sg_maxmin_precision, cnst_light_tab[pos-1].cnst->usage);
916 saturated_constraint_set_update(cnst_light_tab[pos].remaining_over_usage, pos, saturated_constraint_set,
920 saturated_variable_set_update(cnst_light_tab, saturated_constraint_set, sys);
922 } while (cnst_light_num > 0);
925 if (sys->selective_update_active)
926 lmm_remove_all_modified_set(sys);
928 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
932 lmm_check_concurrency(sys);
934 xbt_free(saturated_constraint_set->data);
935 xbt_free(saturated_constraint_set);
936 xbt_free(cnst_light_tab);
940 /** \brief Attribute the value bound to var->bound.
942 * \param sys the lmm_system_t
943 * \param var the lmm_variable_t
944 * \param bound the new bound to associate with var
946 * Makes var->bound equal to bound. Whenever this function is called a change is signed in the system. To
947 * avoid false system changing detection it is a good idea to test (bound != 0) before calling it.
949 void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var, double bound)
954 if (var->cnsts_number)
955 lmm_update_modified_set(sys, var->cnsts[0].constraint);
958 int lmm_concurrency_slack(lmm_constraint_t cnstr){
959 //FIXME MARTIN: Replace by infinite value std::numeric_limits<int>::(max)(), or something better within Simgrid?
960 if(cnstr->concurrency_limit<0)
963 return cnstr->concurrency_limit - cnstr->concurrency_current;
966 /** \brief Measure the minimum concurrency slack across all constraints where the given var is involved */
967 int lmm_cnstrs_min_concurrency_slack(lmm_variable_t var){
969 //FIXME MARTIN: Replace by infinite value std::numeric_limits<int>::(max)(), or something better within Simgrid?
970 int slack,minslack=666;
971 for (i = 0; i < var->cnsts_number; i++) {
972 slack=lmm_concurrency_slack(var->cnsts[i].constraint);
974 //This is only an optimization, to avoid looking at more constraints when slack is already zero
975 //Disable it when debugging to let lmm_concurrency_slack catch nasty things
976 if (not slack && not XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug))
986 /* /Check if a variable can be enabled
988 * Make sure to set staged_weight before, if your intent is only to check concurrency
990 int lmm_can_enable_var(lmm_variable_t var){
991 return var->staged_weight>0 && lmm_cnstrs_min_concurrency_slack(var)>=var->concurrency_share;
994 //Small remark: In this implementation of lmm_enable_var and lmm_disable_var, we will meet multiple times with var when
995 // running lmm_update_modified_set.
996 //A priori not a big performance issue, but we might do better by calling lmm_update_modified_set within the for loops
997 // (after doing the first for enabling==1, and before doing the last for disabling==1)
998 void lmm_enable_var(lmm_system_t sys, lmm_variable_t var){
1002 xbt_assert(lmm_can_enable_var(var));
1004 var->weight = var->staged_weight;
1005 var->staged_weight = 0;
1007 //Enabling the variable, move to var to list head. Subtility is: here, we need to call lmm_update_modified_set AFTER
1008 // moving at least one element of var.
1010 xbt_swag_remove(var, &(sys->variable_set));
1011 xbt_swag_insert_at_head(var, &(sys->variable_set));
1012 for (i = 0; i < var->cnsts_number; i++) {
1013 elem = &var->cnsts[i];
1014 xbt_swag_remove(elem, &(elem->constraint->disabled_element_set));
1015 xbt_swag_insert_at_head(elem, &(elem->constraint->enabled_element_set));
1016 lmm_increase_concurrency(elem);
1018 if (var->cnsts_number)
1019 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1021 //When used within lmm_on_disabled_var, we would get an assertion fail, because transiently there can be variables
1022 // that are staged and could be activated.
1023 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1024 // lmm_check_concurrency(sys);
1027 void lmm_disable_var(lmm_system_t sys, lmm_variable_t var){
1031 xbt_assert(not var->staged_weight, "Staged weight should have been cleared");
1032 //Disabling the variable, move to var to list tail. Subtility is: here, we need to call lmm_update_modified_set BEFORE
1033 //moving the last element of var.
1034 xbt_swag_remove(var, &(sys->variable_set));
1035 xbt_swag_insert_at_tail(var, &(sys->variable_set));
1036 if (var->cnsts_number)
1037 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1038 for (i = 0; i < var->cnsts_number; i++) {
1039 elem = &var->cnsts[i];
1040 xbt_swag_remove(elem, &(elem->constraint->enabled_element_set));
1041 xbt_swag_insert_at_tail(elem, &(elem->constraint->disabled_element_set));
1043 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
1045 lmm_decrease_concurrency(elem);
1049 var->staged_weight=0.0;
1051 lmm_check_concurrency(sys);
1054 /* /brief Find variables that can be enabled and enable them.
1056 * Assuming that the variable has already been removed from non-zero weights
1057 * Can we find a staged variable to add?
1058 * If yes, check that none of the constraints that this variable is involved in is at the limit of its concurrency
1059 * And then add it to enabled variables
1061 void lmm_on_disabled_var(lmm_system_t sys, lmm_constraint_t cnstr){
1063 if(cnstr->concurrency_limit<0)
1066 int numelem = xbt_swag_size(&(cnstr->disabled_element_set));
1070 lmm_element_t elem = (lmm_element_t)xbt_swag_getFirst(&(cnstr->disabled_element_set));
1072 //Cannot use xbt_swag_foreach, because lmm_enable_var will modify disabled_element_set.. within the loop
1073 while (numelem-- && elem) {
1075 lmm_element_t nextelem = (lmm_element_t)xbt_swag_getNext(elem, cnstr->disabled_element_set.offset);
1077 if (elem->variable->staged_weight>0 ){
1078 //Found a staged variable
1079 //TODOLATER: Add random timing function to model reservation protocol fuzziness? Then how to make sure that
1080 //staged variables will eventually be called?
1081 if(lmm_can_enable_var(elem->variable)){
1082 lmm_enable_var(sys,elem->variable);
1086 xbt_assert(cnstr->concurrency_current<=cnstr->concurrency_limit,"Concurrency overflow!");
1087 if(cnstr->concurrency_current==cnstr->concurrency_limit)
1093 //We could get an assertion fail, because transiently there can be variables that are staged and could be activated.
1094 //And we need to go through all constraints of the disabled var before getting back a coherent state.
1095 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1096 // lmm_check_concurrency(sys);
1099 /* \brief update the weight of a variable, and enable/disable it.
1100 * @return Returns whether a change was made
1102 void lmm_update_variable_weight(lmm_system_t sys, lmm_variable_t var, double weight)
1105 xbt_assert(weight>=0,"Variable weight should not be negative!");
1107 if (weight == var->weight)
1110 int enabling_var= (weight>0 && var->weight<=0);
1111 int disabling_var= (weight<=0 && var->weight>0);
1113 XBT_IN("(sys=%p, var=%p, weight=%f)", sys, var, weight);
1117 //Are we enabling this variable?
1119 var->staged_weight = weight;
1120 int minslack = lmm_cnstrs_min_concurrency_slack(var);
1121 if (minslack < var->concurrency_share) {
1122 XBT_DEBUG("Staging var (instead of enabling) because min concurrency slack %i, with weight %f and concurrency"
1123 " share %i", minslack, weight, var->concurrency_share);
1126 XBT_DEBUG("Enabling var with min concurrency slack %i", minslack);
1127 lmm_enable_var(sys,var);
1128 } else if (disabling_var){
1129 //Are we disabling this variable?
1130 lmm_disable_var(sys,var);
1135 lmm_check_concurrency(sys);
1140 double lmm_get_variable_weight(lmm_variable_t var)
1145 void lmm_update_constraint_bound(lmm_system_t sys, lmm_constraint_t cnst, double bound)
1148 lmm_update_modified_set(sys, cnst);
1149 cnst->bound = bound;
1152 int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
1154 return xbt_swag_belongs(cnst, &(sys->active_constraint_set));
1157 inline lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys)
1159 return (lmm_constraint_t)xbt_swag_getFirst(&(sys->active_constraint_set));
1162 inline lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys, lmm_constraint_t cnst)
1164 return (lmm_constraint_t)xbt_swag_getNext(cnst, (sys->active_constraint_set).offset);
1167 /** \brief Update the constraint set propagating recursively to
1168 * other constraints so the system should not be entirely computed.
1170 * \param sys the lmm_system_t
1171 * \param cnst the lmm_constraint_t affected by the change
1173 * A recursive algorithm to optimize the system recalculation selecting only constraints that have changed. Each
1174 * constraint change is propagated to the list of constraints for each variable.
1176 static void lmm_update_modified_set_rec(lmm_system_t sys, lmm_constraint_t cnst)
1180 //TODOLATER: Why lmm_modified_set has been changed in git version 2392B5157...? Looks equivalent logically and less obvious..
1181 xbt_swag_foreach(_elem, &cnst->enabled_element_set) {
1182 lmm_variable_t var = ((lmm_element_t)_elem)->variable;
1183 s_lmm_element_t *cnsts = var->cnsts;
1185 for (i = 0; var->visited != sys->visited_counter && i < var->cnsts_number ; i++) {
1186 if (cnsts[i].constraint != cnst && not xbt_swag_belongs(cnsts[i].constraint, &sys->modified_constraint_set)) {
1187 xbt_swag_insert(cnsts[i].constraint, &sys->modified_constraint_set);
1188 lmm_update_modified_set_rec(sys, cnsts[i].constraint);
1191 //var will be ignored in later visits as long as sys->visited_counter does not move
1192 var->visited = sys->visited_counter;
1196 static void lmm_update_modified_set(lmm_system_t sys, lmm_constraint_t cnst)
1198 /* nothing to do if selective update isn't active */
1199 if (sys->selective_update_active && not xbt_swag_belongs(cnst, &sys->modified_constraint_set)) {
1200 xbt_swag_insert(cnst, &sys->modified_constraint_set);
1201 lmm_update_modified_set_rec(sys, cnst);
1205 /** \brief Remove all constraints of the modified_constraint_set.
1207 * \param sys the lmm_system_t
1209 static void lmm_remove_all_modified_set(lmm_system_t sys)
1211 //We cleverly un-flag all variables just by incrementing sys->visited_counter
1212 //In effect, the var->visited value will no more be equal to sys->visited counter
1213 //To be clean, when visited counter has wrapped around, we force these var->visited values so that variables that
1214 //were in the modified a long (long long) time ago are not wrongly skipped here, which would lead to very nasty bugs
1215 //(i.e. not readibily reproducible, and requiring a lot of run time before happening).
1216 if (++sys->visited_counter == 1) {
1217 /* the counter wrapped around, reset each variable->visited */
1219 xbt_swag_foreach(_var, &sys->variable_set)
1220 ((lmm_variable_t)_var)->visited = 0;
1222 xbt_swag_reset(&sys->modified_constraint_set);
1226 * Returns resource load (in flop per second, or byte per second, or similar)
1228 * If the resource is shared (the default case), the load is sum of
1229 * resource usage made by every variables located on this resource.
1231 * If the resource is not shared (ie in FATPIPE mode), then the the
1232 * load is the max (not the sum) of all resource usages located on this resource.
1234 * \param cnst the lmm_constraint_t associated to the resource
1236 double lmm_constraint_get_usage(lmm_constraint_t cnst) {
1238 xbt_swag_t elem_list = &(cnst->enabled_element_set);
1241 xbt_swag_foreach(_elem, elem_list) {
1242 lmm_element_t elem = (lmm_element_t)_elem;
1243 if (elem->value > 0) {
1244 if (cnst->sharing_policy)
1245 usage += elem->value * elem->variable->value;
1246 else if (usage < elem->value * elem->variable->value)
1247 usage = std::max(usage, elem->value * elem->variable->value);
1253 void lmm_check_concurrency(lmm_system_t sys){
1258 lmm_constraint_t cnst;
1261 int i,belong_to_enabled,belong_to_disabled,belong_to_active;
1263 //These checks are very expensive, so do them only if we want to debug SURF LMM
1264 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
1265 xbt_swag_foreach(_cnst, &(sys->constraint_set)) {
1266 cnst = (lmm_constraint_t) _cnst;
1268 xbt_swag_foreach(_elem, &(cnst->enabled_element_set)) {
1269 elem = (lmm_element_t)_elem;
1270 xbt_assert(elem->variable->weight > 0);
1271 concurrency+=lmm_element_concurrency(elem);
1274 xbt_swag_foreach(_elem, &(cnst->disabled_element_set)) {
1275 elem = (lmm_element_t)_elem;
1276 //We should have staged variables only if concurrency is reached in some constraint
1277 xbt_assert(cnst->concurrency_limit<0 || elem->variable->staged_weight==0 ||
1278 lmm_cnstrs_min_concurrency_slack(elem->variable) < elem->variable->concurrency_share,
1279 "should not have staged variable!");
1282 xbt_assert(cnst->concurrency_limit<0 || cnst->concurrency_limit >= concurrency,"concurrency check failed!");
1283 xbt_assert(cnst->concurrency_current == concurrency, "concurrency_current is out-of-date!");
1286 //Check that for each variable, all corresponding elements are in the same state (i.e. same element sets)
1287 xbt_swag_foreach(_var, &(sys->variable_set)) {
1288 var= (lmm_variable_t) _var;
1290 if (not var->cnsts_number)
1293 elem = &var->cnsts[0];
1294 belong_to_enabled=xbt_swag_belongs(elem,&(elem->constraint->enabled_element_set));
1295 belong_to_disabled=xbt_swag_belongs(elem,&(elem->constraint->disabled_element_set));
1296 belong_to_active=xbt_swag_belongs(elem,&(elem->constraint->active_element_set));
1298 for (i = 1; i < var->cnsts_number; i++) {
1299 elem = &var->cnsts[i];
1300 xbt_assert(belong_to_enabled==xbt_swag_belongs(elem,&(elem->constraint->enabled_element_set)),
1301 "Variable inconsistency (1): enabled_element_set");
1302 xbt_assert(belong_to_disabled==xbt_swag_belongs(elem,&(elem->constraint->disabled_element_set)),
1303 "Variable inconsistency (2): disabled_element_set");
1304 xbt_assert(belong_to_active==xbt_swag_belongs(elem,&(elem->constraint->active_element_set)),
1305 "Variable inconsistency (3): active_element_set");