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 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))) {
123 XBT_WARN("Variable %d still in system when freing it: this may be a bug", var->id_int);
124 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 = NULL;
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 lmm_update_modified_set, and then remove it..
145 if(var->cnsts_number)
146 lmm_update_modified_set(sys, var->cnsts[0].constraint);
148 for (i = 0; i < var->cnsts_number; i++) {
149 elem = &var->cnsts[i];
151 lmm_decrease_concurrency(elem);
152 xbt_swag_remove(elem, &(elem->constraint->enabled_element_set));
153 xbt_swag_remove(elem, &(elem->constraint->disabled_element_set));
154 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
155 nelements=xbt_swag_size(&(elem->constraint->enabled_element_set)) +
156 xbt_swag_size(&(elem->constraint->disabled_element_set));
158 make_constraint_inactive(sys, elem->constraint);
160 lmm_on_disabled_var(sys,elem->constraint);
163 //Check if we can enable new variables going through the constraints where var was.
164 //Do it after removing all elements, so he first disabled variables get priority over those with smaller
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)
182 lmm_variable_remove(sys, var);
183 xbt_mallocator_release(sys->variable_mallocator, var);
186 static inline void lmm_cnst_free(lmm_system_t sys,
187 lmm_constraint_t cnst)
189 make_constraint_inactive(sys, cnst);
193 lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id,
196 lmm_constraint_t cnst = NULL;
197 s_lmm_element_t elem;
199 cnst = xbt_new0(s_lmm_constraint_t, 1);
201 cnst->id_int = Global_const_debug_id++;
202 xbt_swag_init(&(cnst->enabled_element_set),
203 xbt_swag_offset(elem, enabled_element_set_hookup));
204 xbt_swag_init(&(cnst->disabled_element_set),
205 xbt_swag_offset(elem, disabled_element_set_hookup));
206 xbt_swag_init(&(cnst->active_element_set),
207 xbt_swag_offset(elem, active_element_set_hookup));
209 cnst->bound = bound_value;
210 cnst->concurrency_maximum=0;
211 cnst->concurrency_current=0;
212 //TODO MARTIN Maybe a configuration item for the default cap concurrency?
213 cnst->concurrency_limit=100;
215 cnst->sharing_policy = 1; /* FIXME: don't hardcode the value */
216 insert_constraint(sys, cnst);
221 int lmm_constraint_concurrency_limit_get(lmm_constraint_t cnst)
223 return cnst->concurrency_limit;
226 void lmm_constraint_concurrency_limit_set(lmm_constraint_t cnst, int concurrency_limit)
228 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?");
229 cnst->concurrency_limit = concurrency_limit;
232 void lmm_constraint_concurrency_maximum_reset(lmm_constraint_t cnst)
234 cnst->concurrency_maximum = 0;
237 int lmm_constraint_concurrency_maximum_get(lmm_constraint_t cnst)
239 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.");
240 return cnst->concurrency_maximum;
243 void lmm_constraint_shared(lmm_constraint_t cnst)
245 cnst->sharing_policy = 0;
248 /** Return true if the constraint is shared, and false if it's FATPIPE */
249 int lmm_constraint_sharing_policy(lmm_constraint_t cnst)
251 return (cnst->sharing_policy);
254 /* @brief Remove a constraint
255 * Currently this is dead code, but it is exposed in maxmin.h
256 * Apparently, this call was designed assuming that constraint would no more have elements in it.
257 * If this is not the case, assertion will fail, and you need to add calls e.g. to lmm_shrink before effectively removing it.
259 inline void lmm_constraint_free(lmm_system_t sys,
260 lmm_constraint_t cnst)
262 xbt_assert(!xbt_swag_size(&(cnst->active_element_set)),"Removing constraint but it still has active elements");
263 xbt_assert(!xbt_swag_size(&(cnst->enabled_element_set)),"Removing constraint but it still has enabled elements");
264 xbt_assert(!xbt_swag_size(&(cnst->disabled_element_set)),"Removing constraint but it still has disabled elements");
265 remove_constraint(sys, cnst);
266 lmm_cnst_free(sys, cnst);
269 static void *lmm_variable_mallocator_new_f(void)
271 lmm_variable_t var = xbt_new(s_lmm_variable_t, 1);
272 var->cnsts = NULL; /* will be created by realloc */
276 static void lmm_variable_mallocator_free_f(void *var)
278 xbt_free(((lmm_variable_t) var)->cnsts);
282 lmm_variable_t lmm_variable_new(lmm_system_t sys, void *id,
284 double bound, int number_of_constraints)
286 lmm_variable_t var = NULL;
289 XBT_IN("(sys=%p, id=%p, weight=%f, bound=%f, num_cons =%d)",
290 sys, id, weight, bound, number_of_constraints);
292 var = (lmm_variable_t) xbt_mallocator_get(sys->variable_mallocator);
294 var->id_int = Global_debug_id++;
295 var->cnsts = (s_lmm_element_t *) xbt_realloc(var->cnsts, number_of_constraints * sizeof(s_lmm_element_t));
296 for (i = 0; i < number_of_constraints; i++) {
297 var->cnsts[i].enabled_element_set_hookup.next = NULL;
298 var->cnsts[i].enabled_element_set_hookup.prev = NULL;
299 var->cnsts[i].disabled_element_set_hookup.next = NULL;
300 var->cnsts[i].disabled_element_set_hookup.prev = NULL;
301 var->cnsts[i].active_element_set_hookup.next = NULL;
302 var->cnsts[i].active_element_set_hookup.prev = NULL;
303 var->cnsts[i].constraint = NULL;
304 var->cnsts[i].variable = NULL;
305 var->cnsts[i].value = 0.0;
307 var->cnsts_size = number_of_constraints;
308 var->cnsts_number = 0;
309 var->weight = weight;
310 var->staged_weight = 0.0;
312 var->concurrency_share = 1;
314 var->visited = sys->visited_counter - 1;
317 var->func_f = func_f_def;
318 var->func_fp = func_fp_def;
319 var->func_fpi = func_fpi_def;
321 var->variable_set_hookup.next = NULL;
322 var->variable_set_hookup.prev = NULL;
323 var->saturated_variable_set_hookup.next = NULL;
324 var->saturated_variable_set_hookup.prev = NULL;
327 xbt_swag_insert_at_head(var, &(sys->variable_set));
329 xbt_swag_insert_at_tail(var, &(sys->variable_set));
331 XBT_OUT(" returns %p", var);
335 void lmm_variable_free(lmm_system_t sys, lmm_variable_t var)
337 remove_variable(sys, var);
338 lmm_var_free(sys, var);
341 double lmm_variable_getvalue(lmm_variable_t var)
347 void lmm_variable_concurrency_share_set(lmm_variable_t var, short int concurrency_share)
349 var->concurrency_share=concurrency_share;
352 double lmm_variable_getbound(lmm_variable_t var)
357 void lmm_shrink(lmm_system_t sys, lmm_constraint_t cnst,
360 lmm_element_t elem = NULL;
364 for (i = 0; i < var->cnsts_number; i++) {
365 elem = &(var->cnsts[i]);
366 if (elem->constraint == cnst) {
373 XBT_DEBUG("cnst %p is not found in var %p", cnst, var);
379 XBT_DEBUG("remove elem(value %f, cnst %p, var %p) in var %p",
380 elem->value, elem->constraint, elem->variable, var);
382 /* We are going to change the constraint object and the variable object.
383 * Propagate this change to other objects. Calling here before removing variable from not active elements (inactive elements are not visited)
385 lmm_update_modified_set(sys, cnst);
386 //Useful in case var was already removed from the constraint
387 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].
389 if(xbt_swag_remove(elem, &(elem->constraint->enabled_element_set)))
390 lmm_decrease_concurrency(elem);
392 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
393 elem->constraint = NULL;
394 elem->variable = NULL;
397 var->cnsts_number -= 1;
399 //No variable in this constraint -> make it inactive
400 if (xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set)) == 0)
401 make_constraint_inactive(sys, cnst);
403 //Check maxconcurrency to see if we can enable new variables
404 lmm_on_disabled_var(sys,elem->constraint);
407 lmm_check_concurrency(sys);
410 void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
411 lmm_variable_t var, double value)
413 lmm_element_t elem = NULL;
420 //Check if this variable already has an active element in this constraint
421 //If it does, substract it from the required slack
423 if(var->concurrency_share>1){
424 for( i=0; i<var->cnsts_number;i++){
425 if(var->cnsts[i].constraint==cnst && xbt_swag_belongs(&var->cnsts[i],&(var->cnsts[i].constraint->enabled_element_set)))
426 current_share+=lmm_element_concurrency(&(var->cnsts[i]));
430 //Check if we need to disable the variable
431 if(var->weight>0 && var->concurrency_share-current_share>lmm_concurrency_slack(cnst))
434 lmm_disable_var(sys,var);
435 for (i = 0; i < var->cnsts_number; i++)
436 lmm_on_disabled_var(sys,var->cnsts[i].constraint);
438 var->staged_weight=weight;
439 xbt_assert(!var->weight);
442 xbt_assert(var->cnsts_number < var->cnsts_size, "Too much constraints");
444 elem = &(var->cnsts[var->cnsts_number++]);
447 elem->constraint = cnst;
448 elem->variable = var;
452 xbt_swag_insert_at_head(elem, &(elem->constraint->enabled_element_set));
453 lmm_increase_concurrency(elem);
456 xbt_swag_insert_at_tail(elem, &(elem->constraint->disabled_element_set));
458 if(!sys->selective_update_active) {
459 make_constraint_active(sys, cnst);
460 } else if(elem->value>0 || var->weight >0) {
461 make_constraint_active(sys, cnst);
462 lmm_update_modified_set(sys, cnst);
463 //TODOLATER: Why do we need this second call?
464 if (var->cnsts_number > 1)
465 lmm_update_modified_set(sys, var->cnsts[0].constraint);
468 lmm_check_concurrency(sys);
471 void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst,
472 lmm_variable_t var, double value)
478 lmm_check_concurrency(sys);
480 //BEWARE: In case you have multiple elements in one constraint, this will always
481 //add value to the first element.
482 for (i = 0; i < var->cnsts_number; i++)
483 if (var->cnsts[i].constraint == cnst)
486 if (i < var->cnsts_number) {
488 lmm_decrease_concurrency(&var->cnsts[i]);
490 if (cnst->sharing_policy)
491 var->cnsts[i].value += value;
493 var->cnsts[i].value = MAX(var->cnsts[i].value, value);
495 //We need to check that increasing value of the element does not cross the concurrency limit
497 if(lmm_concurrency_slack(cnst)<lmm_element_concurrency(&var->cnsts[i])){
499 lmm_disable_var(sys,var);
500 for (j = 0; j < var->cnsts_number; j++)
501 lmm_on_disabled_var(sys,var->cnsts[j].constraint);
502 var->staged_weight=weight;
503 xbt_assert(!var->weight);
505 lmm_increase_concurrency(&var->cnsts[i]);
508 lmm_update_modified_set(sys, cnst);
510 lmm_expand(sys, cnst, var, value);
512 lmm_check_concurrency(sys);
515 lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t /*sys*/,
519 if (num < var->cnsts_number)
520 return (var->cnsts[num].constraint);
525 double lmm_get_cnst_weight_from_var(lmm_system_t /*sys*/,
529 if (num < var->cnsts_number)
530 return (var->cnsts[num].value);
535 int lmm_get_number_of_cnst_from_var(lmm_system_t /*sys*/,
538 return (var->cnsts_number);
541 lmm_variable_t lmm_get_var_from_cnst(lmm_system_t /*sys*/,
542 lmm_constraint_t cnst,
543 lmm_element_t * elem)
547 //That is the first call, pick the first element among enabled_element_set (or disabled_element_set if enabled_element_set is empty)
548 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
550 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
552 //elem is not null, so we carry on
553 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
554 //Look at enabled_element_set, and jump to disabled_element_set when finished
555 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
557 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
559 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
563 return (*elem)->variable;
568 //if we modify the swag between calls, normal version may loop forever
569 //this safe version ensures that we browse the swag elements only once
570 lmm_variable_t lmm_get_var_from_cnst_safe(lmm_system_t /*sys*/,
571 lmm_constraint_t cnst,
572 lmm_element_t * elem,
573 lmm_element_t * nextelem,
577 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
578 *numelem = xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set))-1;
580 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
589 //elem is not null, so we carry on
590 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
591 //Look at enabled_element_set, and jump to disabled_element_set when finished
592 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
594 *nextelem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
596 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
598 return (*elem)->variable;
603 void *lmm_constraint_id(lmm_constraint_t cnst)
608 void *lmm_variable_id(lmm_variable_t var)
613 static inline void saturated_constraint_set_update(double usage,
615 dyn_light_t saturated_constraint_set,
618 xbt_assert(usage > 0,"Impossible");
620 if (*min_usage < 0 || *min_usage > usage) {
622 XBT_HERE(" min_usage=%f (cnst->remaining / cnst->usage =%f)", *min_usage, usage);
623 saturated_constraint_set->data[0] = cnst_light_num;
624 saturated_constraint_set->pos = 1;
625 } else if (*min_usage == usage) {
626 if(saturated_constraint_set->pos == saturated_constraint_set->size) { // realloc the size
627 saturated_constraint_set->size *= 2;
628 saturated_constraint_set->data = (int*) xbt_realloc(saturated_constraint_set->data, (saturated_constraint_set->size) * sizeof(int));
630 saturated_constraint_set->data[saturated_constraint_set->pos] = cnst_light_num;
631 saturated_constraint_set->pos++;
635 static inline void saturated_variable_set_update(
636 s_lmm_constraint_light_t *cnst_light_tab,
637 dyn_light_t saturated_constraint_set,
640 /* Add active variables (i.e. variables that need to be set) from the set of constraints to saturate (cnst_light_tab)*/
641 lmm_constraint_light_t cnst = NULL;
643 lmm_element_t elem = NULL;
644 xbt_swag_t elem_list = NULL;
646 for(i = 0; i< saturated_constraint_set->pos; i++){
647 cnst = &cnst_light_tab[saturated_constraint_set->data[i]];
648 elem_list = &(cnst->cnst->active_element_set);
649 xbt_swag_foreach(_elem, elem_list) {
650 elem = (lmm_element_t)_elem;
651 //Visiting active_element_set, so, by construction, should never get a zero weight, correct?
652 xbt_assert(elem->variable->weight > 0);
653 if ((elem->value > 0))
654 xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
659 void lmm_print(lmm_system_t sys)
661 void *_cnst, *_elem, *_var;
662 lmm_constraint_t cnst = NULL;
663 lmm_element_t elem = NULL;
664 lmm_variable_t var = NULL;
665 xbt_swag_t cnst_list = NULL;
666 xbt_swag_t var_list = NULL;
667 xbt_swag_t elem_list = NULL;
668 char print_buf[1024];
669 char *trace_buf = (char*) xbt_malloc0(sizeof(char));
672 /* Printing Objective */
673 var_list = &(sys->variable_set);
674 sprintf(print_buf, "MAX-MIN ( ");
676 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
677 strcat(trace_buf, print_buf);
678 xbt_swag_foreach(_var, var_list) {
679 var = (lmm_variable_t)_var;
680 sprintf(print_buf, "'%d'(%f) ", var->id_int, var->weight);
682 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
683 strcat(trace_buf, print_buf);
685 sprintf(print_buf, ")");
687 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
688 strcat(trace_buf, print_buf);
689 XBT_DEBUG("%20s", trace_buf);
690 trace_buf[0] = '\000';
692 XBT_DEBUG("Constraints");
693 /* Printing Constraints */
694 cnst_list = &(sys->active_constraint_set);
695 xbt_swag_foreach(_cnst, cnst_list) {
696 cnst = (lmm_constraint_t)_cnst;
698 //Show the enabled variables
699 elem_list = &(cnst->enabled_element_set);
700 sprintf(print_buf, "\t");
702 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
703 strcat(trace_buf, print_buf);
704 sprintf(print_buf, "%s(",(cnst->sharing_policy)?"":"max");
706 xbt_realloc(trace_buf,
707 strlen(trace_buf) + strlen(print_buf) + 1);
708 strcat(trace_buf, print_buf);
709 xbt_swag_foreach(_elem, elem_list) {
710 elem = (lmm_element_t)_elem;
711 sprintf(print_buf, "%f.'%d'(%f) %s ", elem->value,
712 elem->variable->id_int, elem->variable->value,(cnst->sharing_policy)?"+":",");
714 xbt_realloc(trace_buf,
715 strlen(trace_buf) + strlen(print_buf) + 1);
716 strcat(trace_buf, print_buf);
717 if(cnst->sharing_policy)
718 sum += elem->value * elem->variable->value;
720 sum = MAX(sum,elem->value * elem->variable->value);
722 //TODO: Adding disabled elements only for test compatibility, but do we really want them to be printed?
723 elem_list = &(cnst->disabled_element_set);
724 xbt_swag_foreach(_elem, elem_list) {
725 elem = (lmm_element_t)_elem;
726 sprintf(print_buf, "%f.'%d'(%f) %s ", elem->value,
727 elem->variable->id_int, elem->variable->value,(cnst->sharing_policy)?"+":",");
729 xbt_realloc(trace_buf,
730 strlen(trace_buf) + strlen(print_buf) + 1);
731 strcat(trace_buf, print_buf);
732 if(cnst->sharing_policy)
733 sum += elem->value * elem->variable->value;
735 sum = MAX(sum,elem->value * elem->variable->value);
738 sprintf(print_buf, "0) <= %f ('%d')", cnst->bound, cnst->id_int);
740 xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
741 strcat(trace_buf, print_buf);
743 if (!cnst->sharing_policy) {
744 sprintf(print_buf, " [MAX-Constraint]");
746 xbt_realloc(trace_buf,
747 strlen(trace_buf) + strlen(print_buf) + 1);
748 strcat(trace_buf, print_buf);
750 XBT_DEBUG("%s", trace_buf);
751 trace_buf[0] = '\000';
752 xbt_assert(!double_positive(sum - cnst->bound, cnst->bound*sg_maxmin_precision),
753 "Incorrect value (%f is not smaller than %f): %g",
754 sum, cnst->bound, sum - cnst->bound);
755 //if(double_positive(sum - cnst->bound, cnst->bound*sg_maxmin_precision))
756 //XBT_ERROR("Incorrect value (%f is not smaller than %f): %g",sum, cnst->bound, sum - cnst->bound);
760 XBT_DEBUG("Variables");
761 /* Printing Result */
762 xbt_swag_foreach(_var, var_list) {
763 var = (lmm_variable_t)_var;
764 if (var->bound > 0) {
765 XBT_DEBUG("'%d'(%f) : %f (<=%f)", var->id_int, var->weight, var->value,
767 xbt_assert(!double_positive(var->value - var->bound, var->bound*sg_maxmin_precision),
768 "Incorrect value (%f is not smaller than %f",
769 var->value, var->bound);
771 XBT_DEBUG("'%d'(%f) : %f", var->id_int, var->weight, var->value);
778 void lmm_solve(lmm_system_t sys)
780 void *_var, *_cnst, *_cnst_next, *_elem;
781 lmm_variable_t var = NULL;
782 lmm_constraint_t cnst = NULL;
783 lmm_element_t elem = NULL;
784 xbt_swag_t cnst_list = NULL;
785 xbt_swag_t var_list = NULL;
786 xbt_swag_t elem_list = NULL;
787 double min_usage = -1;
788 double min_bound = -1;
790 if (!(sys->modified))
793 XBT_IN("(sys=%p)", sys);
796 * 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.
800 selective_update_active ? &(sys->modified_constraint_set) :
801 &(sys->active_constraint_set);
803 XBT_DEBUG("Active constraints : %d", xbt_swag_size(cnst_list));
804 /* Init: Only modified code portions: reset the value of active variables */
805 xbt_swag_foreach(_cnst, cnst_list) {
806 cnst = (lmm_constraint_t)_cnst;
807 elem_list = &(cnst->enabled_element_set);
808 //XBT_DEBUG("Variable set : %d", xbt_swag_size(elem_list));
809 xbt_swag_foreach(_elem, elem_list) {
810 var = ((lmm_element_t)_elem)->variable;
811 xbt_assert(var->weight > 0.0);
816 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));
817 int cnst_light_num = 0;
818 dyn_light_t saturated_constraint_set = xbt_new0(s_dyn_light_t,1);
819 saturated_constraint_set->size = 5;
820 saturated_constraint_set->data = xbt_new0(int, saturated_constraint_set->size);
822 xbt_swag_foreach_safe(_cnst, _cnst_next, cnst_list) {
823 cnst = (lmm_constraint_t)_cnst;
824 /* INIT: Collect constraints that actually need to be saturated (i.e remaining and usage are strictly positive) into cnst_light_tab. */
825 cnst->remaining = cnst->bound;
826 if (!double_positive(cnst->remaining, cnst->bound*sg_maxmin_precision))
829 elem_list = &(cnst->enabled_element_set);
830 xbt_swag_foreach(_elem, elem_list) {
831 elem = (lmm_element_t)_elem;
832 xbt_assert(elem->variable->weight > 0);
833 if ((elem->value > 0)) {
834 if (cnst->sharing_policy)
835 cnst->usage += elem->value / elem->variable->weight;
836 else if (cnst->usage < elem->value / elem->variable->weight)
837 cnst->usage = elem->value / elem->variable->weight;
839 make_elem_active(elem);
840 simgrid::surf::Action *action = static_cast<simgrid::surf::Action*>(elem->variable->id);
841 if (sys->keep_track && !action->is_linked())
842 sys->keep_track->push_back(*action);
845 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);
846 /* Saturated constraints update */
848 if(cnst->usage > 0) {
849 cnst_light_tab[cnst_light_num].cnst = cnst;
850 cnst->cnst_light = &(cnst_light_tab[cnst_light_num]);
851 cnst_light_tab[cnst_light_num].remaining_over_usage = cnst->remaining / cnst->usage;
852 saturated_constraint_set_update(cnst_light_tab[cnst_light_num].remaining_over_usage,
853 cnst_light_num, saturated_constraint_set, &min_usage);
854 xbt_assert(cnst->active_element_set.count>0, "There is no sense adding a constraint that has no active element!" );
859 saturated_variable_set_update( cnst_light_tab,
860 saturated_constraint_set,
863 /* Saturated variables update */
866 /* Fix the variables that have to be */
867 var_list = &(sys->saturated_variable_set);
869 xbt_swag_foreach(_var, var_list) {
870 var = (lmm_variable_t)_var;
871 if (var->weight <= 0.0)
873 /* First check if some of these variables could reach their upper
874 bound and update min_bound accordingly. */
876 ("var=%d, var->bound=%f, var->weight=%f, min_usage=%f, var->bound*var->weight=%f",
877 var->id_int, var->bound, var->weight, min_usage,
878 var->bound * var->weight);
879 if ((var->bound > 0) && (var->bound * var->weight < min_usage)) {
881 min_bound = var->bound*var->weight;
883 min_bound = MIN(min_bound, (var->bound*var->weight));
884 XBT_DEBUG("Updated min_bound=%f", min_bound);
889 while ((var = (lmm_variable_t)xbt_swag_getFirst(var_list))) {
893 //If no variable could reach its bound, deal iteratively the constraints usage ( at worst one constraint is saturated at each cycle)
894 var->value = min_usage / var->weight;
895 // XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
896 XBT_DEBUG("Setting var (%d) value to %f\n", var->id_int, var->value);
898 //If there exist a variable that can reach its bound, only update it (and other with the same bound) for now.
899 if (double_equals(min_bound, var->bound*var->weight, sg_maxmin_precision)){
900 var->value = var->bound;
901 XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
904 // Variables which bound is different are not considered for this cycle, but they will be afterwards.
905 XBT_DEBUG("Do not consider %p (%d) \n", var, var->id_int);
906 xbt_swag_remove(var, var_list);
910 XBT_DEBUG("Min usage: %f, Var(%d)->weight: %f, Var(%d)->value: %f ",
911 min_usage, var->id_int, var->weight, var->id_int, var->value);
914 /* Update the usage of contraints where this variable is involved */
915 for (i = 0; i < var->cnsts_number; i++) {
916 elem = &var->cnsts[i];
917 cnst = elem->constraint;
918 if (cnst->sharing_policy) {
919 //Remember: shared constraints require that sum(elem->value * var->value) < cnst->bound
920 double_update(&(cnst->remaining), elem->value * var->value, cnst->bound*sg_maxmin_precision);
921 double_update(&(cnst->usage), elem->value / var->weight, sg_maxmin_precision);
922 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
923 if(!double_positive(cnst->usage,sg_maxmin_precision) || !double_positive(cnst->remaining,cnst->bound*sg_maxmin_precision)) {
924 if (cnst->cnst_light) {
925 int index = (cnst->cnst_light-cnst_light_tab);
926 XBT_DEBUG("index: %d \t cnst_light_num: %d \t || usage: %f remaining: %f bound: %f ",
927 index,cnst_light_num, cnst->usage, cnst->remaining, cnst->bound);
928 // 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 ",
929 //index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
930 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
931 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
933 cnst->cnst_light = NULL;
936 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
938 make_elem_inactive(elem);
940 //Remember: non-shared constraints only require that max(elem->value * var->value) < cnst->bound
942 make_elem_inactive(elem);
943 elem_list = &(cnst->enabled_element_set);
944 xbt_swag_foreach(_elem, elem_list) {
945 elem = (lmm_element_t)_elem;
946 xbt_assert(elem->variable->weight > 0);
947 if (elem->variable->value > 0) continue;
949 cnst->usage = MAX(cnst->usage, elem->value / elem->variable->weight);
951 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
952 if(!double_positive(cnst->usage,sg_maxmin_precision) || !double_positive(cnst->remaining,cnst->bound*sg_maxmin_precision)) {
953 if(cnst->cnst_light) {
954 int index = (cnst->cnst_light-cnst_light_tab);
955 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 ",
956 index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
957 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
958 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
960 cnst->cnst_light = NULL;
963 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
964 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." );
968 xbt_swag_remove(var, var_list);
971 /* Find out which variables reach the maximum */
974 saturated_constraint_set->pos = 0;
976 for(pos=0; pos<cnst_light_num; pos++){
977 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);
978 saturated_constraint_set_update(
979 cnst_light_tab[pos].remaining_over_usage,
981 saturated_constraint_set,
985 saturated_variable_set_update( cnst_light_tab,
986 saturated_constraint_set,
989 } while (cnst_light_num > 0);
992 if (sys->selective_update_active)
993 lmm_remove_all_modified_set(sys);
995 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
999 lmm_check_concurrency(sys);
1001 xbt_free(saturated_constraint_set->data);
1002 xbt_free(saturated_constraint_set);
1003 xbt_free(cnst_light_tab);
1008 /** \brief Attribute the value bound to var->bound.
1010 * \param sys the lmm_system_t
1011 * \param var the lmm_variable_t
1012 * \param bound the new bound to associate with var
1014 * Makes var->bound equal to bound. Whenever this function is called
1015 * a change is signed in the system. To
1016 * avoid false system changing detection it is a good idea to test
1017 * (bound != 0) before calling it.
1020 void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
1026 if (var->cnsts_number)
1027 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1032 int lmm_concurrency_slack(lmm_constraint_t cnstr){
1034 //FIXME MARTIN: Replace by infinite value std::numeric_limits<int>::(max)(), or something better within Simgrid?
1035 if(cnstr->concurrency_limit<0)
1038 return cnstr->concurrency_limit - cnstr->concurrency_current;
1041 /** \brief Measure the minimum concurrency slack across all constraints where var is involved
1043 * \param The variable to check for
1046 int lmm_cnstrs_min_concurrency_slack(lmm_variable_t var){
1048 //FIXME MARTIN: Replace by infinite value std::numeric_limits<int>::(max)(), or something better within Simgrid?
1049 int slack,minslack=666;
1050 for (i = 0; i < var->cnsts_number; i++) {
1051 slack=lmm_concurrency_slack(var->cnsts[i].constraint);
1053 //This is only an optimization, to avoid looking at more constraints when slack is already zero
1054 //Disable it when debugging to let lmm_concurrency_slack catch nasty things
1055 if(!slack && !XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug))
1065 /* /Check if a variable can be enabled
1067 * Make sure to set staged_weight before, if your intent is only to check concurrency
1069 int lmm_can_enable_var(lmm_variable_t var){
1070 return var->staged_weight>0 && lmm_cnstrs_min_concurrency_slack(var)>=var->concurrency_share;
1074 //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.
1075 //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)
1077 void lmm_enable_var(lmm_system_t sys, lmm_variable_t var){
1082 xbt_assert(lmm_can_enable_var(var));
1084 var->weight = var->staged_weight;
1085 var->staged_weight = 0;
1087 //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.
1089 xbt_swag_remove(var, &(sys->variable_set));
1090 xbt_swag_insert_at_head(var, &(sys->variable_set));
1091 for (i = 0; i < var->cnsts_number; i++) {
1092 elem = &var->cnsts[i];
1093 xbt_swag_remove(elem, &(elem->constraint->disabled_element_set));
1094 xbt_swag_insert_at_head(elem, &(elem->constraint->enabled_element_set));
1095 lmm_increase_concurrency(elem);
1097 if (var->cnsts_number)
1098 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1100 //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.
1101 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1102 // lmm_check_concurrency(sys);
1105 void lmm_disable_var(lmm_system_t sys, lmm_variable_t var){
1109 xbt_assert(!var->staged_weight,"Staged weight should have been cleared");
1110 //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.
1111 xbt_swag_remove(var, &(sys->variable_set));
1112 xbt_swag_insert_at_tail(var, &(sys->variable_set));
1113 if (var->cnsts_number)
1114 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1115 for (i = 0; i < var->cnsts_number; i++) {
1116 elem = &var->cnsts[i];
1117 xbt_swag_remove(elem, &(elem->constraint->enabled_element_set));
1118 xbt_swag_insert_at_tail(elem, &(elem->constraint->disabled_element_set));
1120 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
1122 lmm_decrease_concurrency(elem);
1126 var->staged_weight=0.0;
1128 lmm_check_concurrency(sys);
1131 /* /brief Find variables that can be enabled and enable them.
1133 * Assuming that the variable has already been removed from non-zero weights
1134 * Can we find a staged variable to add?
1135 * If yes, check that none of the constraints that this variable is involved in is at the limit of its concurrency
1136 * And then add it to enabled variables
1138 void lmm_on_disabled_var(lmm_system_t sys, lmm_constraint_t cnstr){
1141 lmm_element_t nextelem;
1144 if(cnstr->concurrency_limit<0)
1147 numelem=xbt_swag_size(&(cnstr->disabled_element_set));
1151 elem= (lmm_element_t) xbt_swag_getFirst(&(cnstr->disabled_element_set));
1153 //Cannot use xbt_swag_foreach, because lmm_enable_var will modify disabled_element_set.. within the loop
1154 while(numelem-- && elem ){
1156 nextelem = (lmm_element_t) xbt_swag_getNext(elem, cnstr->disabled_element_set.offset);
1158 if (elem->variable->staged_weight>0 )
1160 //Found a staged variable
1161 //TODOLATER: Add random timing function to model reservation protocol fuzziness? Then how to make sure that staged variables will eventually be called?
1162 if(lmm_can_enable_var(elem->variable)){
1163 lmm_enable_var(sys,elem->variable);
1167 xbt_assert(cnstr->concurrency_current<=cnstr->concurrency_limit,"Concurrency overflow!");
1168 if(cnstr->concurrency_current==cnstr->concurrency_limit)
1174 //We could get an assertion fail, because transiently there can be variables that are staged and could be activated.
1175 //And we need to go through all constraints of the disabled var before getting back a coherent state.
1176 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1177 // lmm_check_concurrency(sys);
1181 /* \brief update the weight of a variable, and enable/disable it.
1182 * @return Returns whether a change was made
1184 void lmm_update_variable_weight(lmm_system_t sys, lmm_variable_t var,
1189 xbt_assert(weight>=0,"Variable weight should not be negative!");
1191 if (weight == var->weight)
1194 int enabling_var= (weight>0 && var->weight<=0);
1195 int disabling_var= (weight<=0 && var->weight>0);
1197 XBT_IN("(sys=%p, var=%p, weight=%f)", sys, var, weight);
1201 //Are we enabling this variable?
1203 var->staged_weight = weight;
1204 minslack=lmm_cnstrs_min_concurrency_slack(var);
1205 if(minslack<var->concurrency_share){
1206 XBT_DEBUG("Staging var (instead of enabling) because min concurrency slack %i, with weight %f and concurrency share %i", minslack, weight, var->concurrency_share);
1209 XBT_DEBUG("Enabling var with min concurrency slack %i", minslack);
1210 lmm_enable_var(sys,var);
1211 } else if (disabling_var){
1212 //Are we disabling this variable?
1213 lmm_disable_var(sys,var);
1218 lmm_check_concurrency(sys);
1224 double lmm_get_variable_weight(lmm_variable_t var)
1229 void lmm_update_constraint_bound(lmm_system_t sys,
1230 lmm_constraint_t cnst,
1234 lmm_update_modified_set(sys, cnst);
1235 cnst->bound = bound;
1238 int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
1240 return xbt_swag_belongs(cnst, &(sys->active_constraint_set));
1243 inline lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t
1246 return (lmm_constraint_t)xbt_swag_getFirst(&(sys->active_constraint_set));
1249 inline lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t
1254 return (lmm_constraint_t)xbt_swag_getNext(cnst, (sys->active_constraint_set).offset);
1257 /** \brief Update the constraint set propagating recursively to
1258 * other constraints so the system should not be entirely computed.
1260 * \param sys the lmm_system_t
1261 * \param cnst the lmm_constraint_t affected by the change
1263 * A recursive algorithm to optimize the system recalculation selecting only
1264 * constraints that have changed. Each constraint change is propagated
1265 * to the list of constraints for each variable.
1267 static void lmm_update_modified_set_rec(lmm_system_t sys,
1268 lmm_constraint_t cnst)
1272 //TODOLATER: Why lmm_modified_set has been changed in git version 2392B5157...? Looks equivalent logically and less obvious..
1274 xbt_swag_foreach(_elem, &cnst->enabled_element_set) {
1275 lmm_variable_t var = ((lmm_element_t)_elem)->variable;
1276 s_lmm_element_t *cnsts = var->cnsts;
1278 for (i = 0; var->visited != sys->visited_counter
1279 && i < var->cnsts_number ; i++) {
1280 if (cnsts[i].constraint != cnst
1281 && !xbt_swag_belongs(cnsts[i].constraint,
1282 &sys->modified_constraint_set)) {
1283 xbt_swag_insert(cnsts[i].constraint, &sys->modified_constraint_set);
1284 lmm_update_modified_set_rec(sys, cnsts[i].constraint);
1287 //var will be ignored in later visits as long as sys->visited_counter does not move
1288 var->visited = sys->visited_counter;
1292 static void lmm_update_modified_set(lmm_system_t sys,
1293 lmm_constraint_t cnst)
1295 /* nothing to do if selective update isn't active */
1296 if (sys->selective_update_active
1297 && !xbt_swag_belongs(cnst, &sys->modified_constraint_set)) {
1298 xbt_swag_insert(cnst, &sys->modified_constraint_set);
1299 lmm_update_modified_set_rec(sys, cnst);
1303 /** \brief Remove all constraints of the modified_constraint_set.
1305 * \param sys the lmm_system_t
1308 static void lmm_remove_all_modified_set(lmm_system_t sys)
1311 //We cleverly un-flag all variables just by incrementing sys->visited_counter
1312 //In effect, the var->visited value will no more be equal to sys->visited counter
1313 //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).
1314 if (++sys->visited_counter == 1) {
1315 /* the counter wrapped around, reset each variable->visited */
1317 xbt_swag_foreach(_var, &sys->variable_set)
1318 ((lmm_variable_t)_var)->visited = 0;
1320 xbt_swag_reset(&sys->modified_constraint_set);
1324 * Returns total resource load
1326 * \param cnst the lmm_constraint_t associated to the resource
1329 * This is dead code, but we may use it later for debug/trace.
1331 double lmm_constraint_get_usage(lmm_constraint_t cnst) {
1333 xbt_swag_t elem_list = &(cnst->enabled_element_set);
1335 lmm_element_t elem = NULL;
1337 xbt_swag_foreach(_elem, elem_list) {
1338 elem = (lmm_element_t)_elem;
1339 if ((elem->value > 0)) {
1340 if (cnst->sharing_policy)
1341 usage += elem->value * elem->variable->value;
1342 else if (usage < elem->value * elem->variable->value)
1343 usage = elem->value * elem->variable->value;
1349 void lmm_check_concurrency(lmm_system_t sys){
1354 lmm_constraint_t cnst;
1357 int i,belong_to_enabled,belong_to_disabled,belong_to_active;
1359 //These checks are very expensive, so do them only if we want to debug SURF LMM
1360 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
1362 xbt_swag_foreach(_cnst, &(sys->constraint_set)) {
1363 cnst = (lmm_constraint_t) _cnst;
1365 xbt_swag_foreach(_elem, &(cnst->enabled_element_set)) {
1366 elem = (lmm_element_t)_elem;
1367 xbt_assert(elem->variable->weight > 0);
1368 concurrency+=lmm_element_concurrency(elem);
1371 xbt_swag_foreach(_elem, &(cnst->disabled_element_set)) {
1372 elem = (lmm_element_t)_elem;
1373 //We should have staged variables only if concurrency is reached in some constraint
1374 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!");
1377 xbt_assert(cnst->concurrency_limit<0 || cnst->concurrency_limit >= concurrency,"concurrency check failed!");
1378 xbt_assert(cnst->concurrency_current == concurrency, "concurrency_current is out-of-date!");
1382 //Check that for each variable, all corresponding elements are in the same state (i.e. same element sets)
1383 xbt_swag_foreach(_var, &(sys->variable_set)) {
1384 var= (lmm_variable_t) _var;
1386 if(!var->cnsts_number)
1389 elem = &var->cnsts[0];
1390 belong_to_enabled=xbt_swag_belongs(elem,&(elem->constraint->enabled_element_set));
1391 belong_to_disabled=xbt_swag_belongs(elem,&(elem->constraint->disabled_element_set));
1392 belong_to_active=xbt_swag_belongs(elem,&(elem->constraint->active_element_set));
1394 for (i = 1; i < var->cnsts_number; i++) {
1395 elem = &var->cnsts[i];
1396 xbt_assert(belong_to_enabled==xbt_swag_belongs(elem,&(elem->constraint->enabled_element_set)),
1397 "Variable inconsistency (1): enabled_element_set");
1398 xbt_assert(belong_to_disabled==xbt_swag_belongs(elem,&(elem->constraint->disabled_element_set)),
1399 "Variable inconsistency (2): disabled_element_set");
1400 xbt_assert(belong_to_active==xbt_swag_belongs(elem,&(elem->constraint->active_element_set)),
1401 "Variable inconsistency (3): active_element_set");