1 /* Copyright (c) 2004-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 /* \file callbacks.h */
8 #include "maxmin_private.hpp"
10 #include "xbt/mallocator.h"
11 #include "xbt/sysdep.h"
15 #include <stdio.h> /* sprintf */
18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_maxmin, surf, "Logging specific to SURF (maxmin)");
20 typedef struct s_dyn_light {
24 } s_dyn_light_t, *dyn_light_t;
26 double sg_maxmin_precision = 0.00001; /* Change this with --cfg=maxmin/precision:VALUE */
27 double sg_surf_precision = 0.00001; /* Change this with --cfg=surf/precision:VALUE */
28 int sg_concurrency_limit = -1; /* Change this with --cfg=maxmin/concurrency-limit:VALUE */
30 static void *lmm_variable_mallocator_new_f();
31 static void lmm_variable_mallocator_free_f(void *var);
32 #define lmm_variable_mallocator_reset_f ((void_f_pvoid_t)nullptr)
33 static void lmm_update_modified_set(lmm_system_t sys, lmm_constraint_t cnst);
34 static void lmm_remove_all_modified_set(lmm_system_t sys);
35 static int Global_debug_id = 1;
36 static int Global_const_debug_id = 1;
38 static void lmm_var_free(lmm_system_t sys, lmm_variable_t var);
39 static inline void lmm_cnst_free(lmm_system_t sys, 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->consumption_weight >= 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) {
67 elem->constraint->concurrency_current+= lmm_element_concurrency(elem);
69 lmm_constraint_t cnstr=elem->constraint;
71 if(cnstr->concurrency_current > cnstr->concurrency_maximum)
72 cnstr->concurrency_maximum= cnstr->concurrency_current;
74 xbt_assert(cnstr->concurrency_limit<0 || cnstr->concurrency_current<=cnstr->concurrency_limit,
75 "Concurrency limit overflow!");
78 lmm_system_t lmm_system_new(bool selective_update)
80 lmm_system_t l = nullptr;
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", l->selective_update_active);
92 xbt_swag_init(&(l->variable_set), xbt_swag_offset(var, variable_set_hookup));
93 xbt_swag_init(&(l->constraint_set), xbt_swag_offset(cnst, constraint_set_hookup));
95 xbt_swag_init(&(l->active_constraint_set), xbt_swag_offset(cnst, active_constraint_set_hookup));
97 xbt_swag_init(&(l->modified_constraint_set), xbt_swag_offset(cnst, modified_constraint_set_hookup));
98 xbt_swag_init(&(l->saturated_variable_set), xbt_swag_offset(var, saturated_variable_set_hookup));
99 xbt_swag_init(&(l->saturated_constraint_set), xbt_swag_offset(cnst, saturated_constraint_set_hookup));
101 l->variable_mallocator = xbt_mallocator_new(65536,
102 lmm_variable_mallocator_new_f,
103 lmm_variable_mallocator_free_f,
104 lmm_variable_mallocator_reset_f);
106 l->solve_fun = &lmm_solve;
111 void lmm_system_free(lmm_system_t sys)
113 lmm_variable_t var = nullptr;
114 lmm_constraint_t cnst = nullptr;
119 while ((var = (lmm_variable_t) extract_variable(sys))) {
121 char* demangled = abi::__cxa_demangle(typeid(*var->id).name(), 0, 0, &status);
123 XBT_WARN("Probable bug: a %s variable (#%d) not removed before the LMM system destruction.", demangled,
126 lmm_var_free(sys, var);
128 while ((cnst = (lmm_constraint_t) extract_constraint(sys)))
129 lmm_cnst_free(sys, cnst);
131 xbt_mallocator_free(sys->variable_mallocator);
135 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];
151 if (var->sharing_weight > 0)
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 int 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 sharing_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, sharing_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].consumption_weight = 0.0;
301 var->cnsts_size = number_of_constraints;
302 var->cnsts_number = 0;
303 var->sharing_weight = sharing_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->consumption_weight, elem->constraint,
372 elem->variable, var);
374 /* We are going to change the constraint object and the variable object.
375 * Propagate this change to other objects. Calling here before removing variable from not active elements
376 * (inactive elements are not visited)
378 lmm_update_modified_set(sys, cnst);
379 //Useful in case var was already removed from the constraint
380 lmm_update_modified_set(sys, var->cnsts[0].constraint); // will look up enabled_element_set of this constraint, and
381 //then each var in the enabled_element_set, and each var->cnsts[i].
383 if(xbt_swag_remove(elem, &(elem->constraint->enabled_element_set)))
384 lmm_decrease_concurrency(elem);
386 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
387 elem->constraint = nullptr;
388 elem->variable = nullptr;
389 elem->consumption_weight = 0;
391 var->cnsts_number -= 1;
393 //No variable in this constraint -> make it inactive
394 if (xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set)) == 0)
395 make_constraint_inactive(sys, cnst);
397 //Check maxconcurrency to see if we can enable new variables
398 lmm_on_disabled_var(sys,elem->constraint);
401 lmm_check_concurrency(sys);
404 void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst, lmm_variable_t var, double consumption_weight)
406 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->sharing_weight > 0 && var->concurrency_share - current_share > lmm_concurrency_slack(cnst)) {
424 double weight = var->sharing_weight;
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);
428 consumption_weight = 0;
429 var->staged_weight=weight;
430 xbt_assert(not var->sharing_weight);
433 xbt_assert(var->cnsts_number < var->cnsts_size, "Too much constraints");
435 elem = &(var->cnsts[var->cnsts_number++]);
437 elem->consumption_weight = consumption_weight;
438 elem->constraint = cnst;
439 elem->variable = var;
441 if (var->sharing_weight) {
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->consumption_weight > 0 || var->sharing_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)
465 lmm_check_concurrency(sys);
467 //BEWARE: In case you have multiple elements in one constraint, this will always add value to the first element.
468 for (i = 0; i < var->cnsts_number; i++)
469 if (var->cnsts[i].constraint == cnst)
472 if (i < var->cnsts_number) {
473 if (var->sharing_weight)
474 lmm_decrease_concurrency(&var->cnsts[i]);
476 if (cnst->sharing_policy)
477 var->cnsts[i].consumption_weight += value;
479 var->cnsts[i].consumption_weight = MAX(var->cnsts[i].consumption_weight, value);
481 //We need to check that increasing value of the element does not cross the concurrency limit
482 if (var->sharing_weight) {
483 if(lmm_concurrency_slack(cnst)<lmm_element_concurrency(&var->cnsts[i])){
484 double weight = var->sharing_weight;
485 lmm_disable_var(sys,var);
486 for (int j = 0; j < var->cnsts_number; j++)
487 lmm_on_disabled_var(sys,var->cnsts[j].constraint);
488 var->staged_weight=weight;
489 xbt_assert(not var->sharing_weight);
491 lmm_increase_concurrency(&var->cnsts[i]);
493 lmm_update_modified_set(sys, cnst);
495 lmm_expand(sys, cnst, var, value);
497 lmm_check_concurrency(sys);
500 lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t /*sys*/, lmm_variable_t var, int num)
502 if (num < var->cnsts_number)
503 return (var->cnsts[num].constraint);
508 double lmm_get_cnst_weight_from_var(lmm_system_t /*sys*/, lmm_variable_t var, int num)
510 if (num < var->cnsts_number)
511 return (var->cnsts[num].consumption_weight);
516 int lmm_get_number_of_cnst_from_var(lmm_system_t /*sys*/, lmm_variable_t var)
518 return (var->cnsts_number);
521 lmm_variable_t lmm_get_var_from_cnst(lmm_system_t /*sys*/, lmm_constraint_t cnst, lmm_element_t * elem)
523 if (*elem == nullptr) {
524 // That is the first call, pick the first element among enabled_element_set (or disabled_element_set if
525 // enabled_element_set is empty)
526 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
527 if (*elem == nullptr)
528 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
530 //elem is not null, so we carry on
531 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
532 //Look at enabled_element_set, and jump to disabled_element_set when finished
533 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
534 if (*elem == nullptr)
535 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
537 *elem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
541 return (*elem)->variable;
546 //if we modify the swag between calls, normal version may loop forever
547 //this safe version ensures that we browse the swag elements only once
548 lmm_variable_t lmm_get_var_from_cnst_safe(lmm_system_t /*sys*/, lmm_constraint_t cnst, lmm_element_t * elem,
549 lmm_element_t * nextelem, int * numelem)
551 if (*elem == nullptr) {
552 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->enabled_element_set));
553 *numelem = xbt_swag_size(&(cnst->enabled_element_set))+xbt_swag_size(&(cnst->disabled_element_set))-1;
554 if (*elem == nullptr)
555 *elem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
564 //elem is not null, so we carry on
565 if(xbt_swag_belongs(*elem,&(cnst->enabled_element_set))){
566 //Look at enabled_element_set, and jump to disabled_element_set when finished
567 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->enabled_element_set.offset);
568 if (*nextelem == nullptr)
569 *nextelem = (lmm_element_t) xbt_swag_getFirst(&(cnst->disabled_element_set));
571 *nextelem = (lmm_element_t) xbt_swag_getNext(*elem, cnst->disabled_element_set.offset);
573 return (*elem)->variable;
578 void *lmm_constraint_id(lmm_constraint_t cnst)
583 void *lmm_variable_id(lmm_variable_t var)
588 static inline void saturated_constraint_set_update(double usage, int cnst_light_num,
589 dyn_light_t saturated_constraint_set, double *min_usage)
591 xbt_assert(usage > 0,"Impossible");
593 if (*min_usage < 0 || *min_usage > usage) {
595 XBT_HERE(" min_usage=%f (cnst->remaining / cnst->usage =%f)", *min_usage, usage);
596 saturated_constraint_set->data[0] = cnst_light_num;
597 saturated_constraint_set->pos = 1;
598 } else if (*min_usage == usage) {
599 if(saturated_constraint_set->pos == saturated_constraint_set->size) { // realloc the size
600 saturated_constraint_set->size *= 2;
601 saturated_constraint_set->data =
602 (int*) xbt_realloc(saturated_constraint_set->data, (saturated_constraint_set->size) * sizeof(int));
604 saturated_constraint_set->data[saturated_constraint_set->pos] = cnst_light_num;
605 saturated_constraint_set->pos++;
609 static inline void saturated_variable_set_update(s_lmm_constraint_light_t *cnst_light_tab,
610 dyn_light_t saturated_constraint_set, lmm_system_t sys)
612 /* Add active variables (i.e. variables that need to be set) from the set of constraints to saturate (cnst_light_tab)*/
613 lmm_constraint_light_t cnst = nullptr;
615 lmm_element_t elem = nullptr;
616 xbt_swag_t elem_list = nullptr;
618 for(i = 0; i< saturated_constraint_set->pos; i++){
619 cnst = &cnst_light_tab[saturated_constraint_set->data[i]];
620 elem_list = &(cnst->cnst->active_element_set);
621 xbt_swag_foreach(_elem, elem_list) {
622 elem = (lmm_element_t)_elem;
623 //Visiting active_element_set, so, by construction, should never get a zero weight, correct?
624 xbt_assert(elem->variable->sharing_weight > 0);
625 if ((elem->consumption_weight > 0))
626 xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
631 void lmm_print(lmm_system_t sys)
636 lmm_constraint_t cnst = nullptr;
637 lmm_element_t elem = nullptr;
638 lmm_variable_t var = nullptr;
639 xbt_swag_t cnst_list = nullptr;
640 xbt_swag_t var_list = nullptr;
641 xbt_swag_t elem_list = nullptr;
642 std::string buf = std::string("MAX-MIN ( ");
644 /* Printing Objective */
645 var_list = &(sys->variable_set);
646 xbt_swag_foreach(_var, var_list) {
647 var = (lmm_variable_t)_var;
648 buf = buf + "'" + std::to_string(var->id_int) + "'(" + std::to_string(var->sharing_weight) + ") ";
651 XBT_DEBUG("%20s", buf.c_str());
654 XBT_DEBUG("Constraints");
655 /* Printing Constraints */
656 cnst_list = &(sys->active_constraint_set);
657 xbt_swag_foreach(_cnst, cnst_list) {
658 cnst = (lmm_constraint_t)_cnst;
660 //Show the enabled variables
661 elem_list = &(cnst->enabled_element_set);
663 buf += ((cnst->sharing_policy) ? "(" : "max(");
664 xbt_swag_foreach(_elem, elem_list) {
665 elem = (lmm_element_t)_elem;
666 buf = buf + std::to_string(elem->consumption_weight) + ".'" + std::to_string(elem->variable->id_int) + "'(" +
667 std::to_string(elem->variable->value) + ")" + ((cnst->sharing_policy) ? " + " : " , ");
668 if(cnst->sharing_policy)
669 sum += elem->consumption_weight * elem->variable->value;
671 sum = MAX(sum, elem->consumption_weight * elem->variable->value);
673 //TODO: Adding disabled elements only for test compatibility, but do we really want them to be printed?
674 elem_list = &(cnst->disabled_element_set);
675 xbt_swag_foreach(_elem, elem_list) {
676 elem = (lmm_element_t)_elem;
677 buf = buf + std::to_string(elem->consumption_weight) + ".'" + std::to_string(elem->variable->id_int) + "'(" +
678 std::to_string(elem->variable->value) + ")" + ((cnst->sharing_policy) ? " + " : " , ");
679 if(cnst->sharing_policy)
680 sum += elem->consumption_weight * elem->variable->value;
682 sum = MAX(sum, elem->consumption_weight * elem->variable->value);
685 buf = buf + "0) <= " + std::to_string(cnst->bound) + " ('" + std::to_string(cnst->id_int) + "')";
687 if (not cnst->sharing_policy) {
688 buf += " [MAX-Constraint]";
690 XBT_DEBUG("%s", buf.c_str());
692 xbt_assert(not double_positive(sum - cnst->bound, cnst->bound * sg_maxmin_precision),
693 "Incorrect value (%f is not smaller than %f): %g", sum, cnst->bound, sum - cnst->bound);
694 // if(double_positive(sum - cnst->bound, cnst->bound*sg_maxmin_precision))
695 // XBT_ERROR("Incorrect value (%f is not smaller than %f): %g",sum, cnst->bound, sum - cnst->bound);
698 XBT_DEBUG("Variables");
699 /* Printing Result */
700 xbt_swag_foreach(_var, var_list) {
701 var = (lmm_variable_t)_var;
702 if (var->bound > 0) {
703 XBT_DEBUG("'%d'(%f) : %f (<=%f)", var->id_int, var->sharing_weight, var->value, var->bound);
704 xbt_assert(not double_positive(var->value - var->bound, var->bound * sg_maxmin_precision),
705 "Incorrect value (%f is not smaller than %f", var->value, var->bound);
707 XBT_DEBUG("'%d'(%f) : %f", var->id_int, var->sharing_weight, var->value);
712 void lmm_solve(lmm_system_t sys)
714 void *_var, *_cnst, *_cnst_next, *_elem;
715 lmm_variable_t var = nullptr;
716 lmm_constraint_t cnst = nullptr;
717 lmm_element_t elem = nullptr;
718 xbt_swag_t cnst_list = nullptr;
719 xbt_swag_t var_list = nullptr;
720 xbt_swag_t elem_list = nullptr;
721 double min_usage = -1;
722 double min_bound = -1;
724 if (not sys->modified)
727 XBT_IN("(sys=%p)", sys);
729 /* Compute Usage and store the variables that reach the maximum. If selective_update_active is true, only constraints
730 * that changed are considered. Otherwise all constraints with active actions are considered.
732 cnst_list = sys->selective_update_active ? &(sys->modified_constraint_set) : &(sys->active_constraint_set);
734 XBT_DEBUG("Active constraints : %d", xbt_swag_size(cnst_list));
735 /* Init: Only modified code portions: reset the value of active variables */
736 xbt_swag_foreach(_cnst, cnst_list) {
737 cnst = (lmm_constraint_t)_cnst;
738 elem_list = &(cnst->enabled_element_set);
739 //XBT_DEBUG("Variable set : %d", xbt_swag_size(elem_list));
740 xbt_swag_foreach(_elem, elem_list) {
741 var = ((lmm_element_t)_elem)->variable;
742 xbt_assert(var->sharing_weight > 0.0);
747 s_lmm_constraint_light_t *cnst_light_tab =
748 (s_lmm_constraint_light_t *)xbt_malloc0(xbt_swag_size(cnst_list)*sizeof(s_lmm_constraint_light_t));
749 int cnst_light_num = 0;
750 dyn_light_t saturated_constraint_set = xbt_new0(s_dyn_light_t,1);
751 saturated_constraint_set->size = 5;
752 saturated_constraint_set->data = xbt_new0(int, saturated_constraint_set->size);
754 xbt_swag_foreach_safe(_cnst, _cnst_next, cnst_list) {
755 cnst = (lmm_constraint_t)_cnst;
756 /* INIT: Collect constraints that actually need to be saturated (i.e remaining and usage are strictly positive)
757 * into cnst_light_tab. */
758 cnst->remaining = cnst->bound;
759 if (not double_positive(cnst->remaining, cnst->bound * sg_maxmin_precision))
762 elem_list = &(cnst->enabled_element_set);
763 xbt_swag_foreach(_elem, elem_list) {
764 elem = (lmm_element_t)_elem;
765 xbt_assert(elem->variable->sharing_weight > 0);
766 if ((elem->consumption_weight > 0)) {
767 if (cnst->sharing_policy)
768 cnst->usage += elem->consumption_weight / elem->variable->sharing_weight;
769 else if (cnst->usage < elem->consumption_weight / elem->variable->sharing_weight)
770 cnst->usage = elem->consumption_weight / elem->variable->sharing_weight;
772 make_elem_active(elem);
773 simgrid::surf::Action *action = static_cast<simgrid::surf::Action*>(elem->variable->id);
774 if (sys->keep_track && not action->is_linked())
775 sys->keep_track->push_back(*action);
778 XBT_DEBUG("Constraint '%d' usage: %f remaining: %f concurrency: %i<=%i<=%i", cnst->id_int, cnst->usage,
779 cnst->remaining,cnst->concurrency_current,cnst->concurrency_maximum,cnst->concurrency_limit);
780 /* Saturated constraints update */
782 if(cnst->usage > 0) {
783 cnst_light_tab[cnst_light_num].cnst = cnst;
784 cnst->cnst_light = &(cnst_light_tab[cnst_light_num]);
785 cnst_light_tab[cnst_light_num].remaining_over_usage = cnst->remaining / cnst->usage;
786 saturated_constraint_set_update(cnst_light_tab[cnst_light_num].remaining_over_usage,
787 cnst_light_num, saturated_constraint_set, &min_usage);
788 xbt_assert(cnst->active_element_set.count>0, "There is no sense adding a constraint that has no active element!");
793 saturated_variable_set_update( cnst_light_tab, saturated_constraint_set, sys);
795 /* Saturated variables update */
797 /* Fix the variables that have to be */
798 var_list = &(sys->saturated_variable_set);
800 xbt_swag_foreach(_var, var_list) {
801 var = (lmm_variable_t)_var;
802 if (var->sharing_weight <= 0.0)
804 /* First check if some of these variables could reach their upper bound and update min_bound accordingly. */
805 XBT_DEBUG("var=%d, var->bound=%f, var->weight=%f, min_usage=%f, var->bound*var->weight=%f", var->id_int,
806 var->bound, var->sharing_weight, min_usage, var->bound * var->sharing_weight);
807 if ((var->bound > 0) && (var->bound * var->sharing_weight < min_usage)) {
809 min_bound = var->bound * var->sharing_weight;
811 min_bound = MIN(min_bound, (var->bound * var->sharing_weight));
812 XBT_DEBUG("Updated min_bound=%f", min_bound);
816 while ((var = (lmm_variable_t)xbt_swag_getFirst(var_list))) {
820 //If no variable could reach its bound, deal iteratively the constraints usage ( at worst one constraint is
821 // saturated at each cycle)
822 var->value = min_usage / var->sharing_weight;
823 // XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
824 XBT_DEBUG("Setting var (%d) value to %f\n", var->id_int, var->value);
826 //If there exist a variable that can reach its bound, only update it (and other with the same bound) for now.
827 if (double_equals(min_bound, var->bound * var->sharing_weight, sg_maxmin_precision)) {
828 var->value = var->bound;
829 XBT_DEBUG("Setting %p (%d) value to %f\n", var, var->id_int, var->value);
831 // Variables which bound is different are not considered for this cycle, but they will be afterwards.
832 XBT_DEBUG("Do not consider %p (%d) \n", var, var->id_int);
833 xbt_swag_remove(var, var_list);
837 XBT_DEBUG("Min usage: %f, Var(%d)->weight: %f, Var(%d)->value: %f ", min_usage, var->id_int, var->sharing_weight,
838 var->id_int, var->value);
840 /* Update the usage of contraints where this variable is involved */
841 for (i = 0; i < var->cnsts_number; i++) {
842 elem = &var->cnsts[i];
843 cnst = elem->constraint;
844 if (cnst->sharing_policy) {
845 //Remember: shared constraints require that sum(elem->value * var->value) < cnst->bound
846 double_update(&(cnst->remaining), elem->consumption_weight * var->value, cnst->bound * sg_maxmin_precision);
847 double_update(&(cnst->usage), elem->consumption_weight / var->sharing_weight, sg_maxmin_precision);
848 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
849 if (not double_positive(cnst->usage, sg_maxmin_precision) ||
850 not double_positive(cnst->remaining, cnst->bound * sg_maxmin_precision)) {
851 if (cnst->cnst_light) {
852 int index = (cnst->cnst_light-cnst_light_tab);
853 XBT_DEBUG("index: %d \t cnst_light_num: %d \t || usage: %f remaining: %f bound: %f ",
854 index,cnst_light_num, cnst->usage, cnst->remaining, cnst->bound);
855 //XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p "
856 // "\t cnst_light_tab: %p usage: %f remaining: %f bound: %f ", index,cnst_light_num,
857 // cnst, cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
858 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
859 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
861 cnst->cnst_light = nullptr;
864 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
866 make_elem_inactive(elem);
868 //Remember: non-shared constraints only require that max(elem->value * var->value) < cnst->bound
870 make_elem_inactive(elem);
871 elem_list = &(cnst->enabled_element_set);
872 xbt_swag_foreach(_elem, elem_list) {
873 elem = (lmm_element_t)_elem;
874 xbt_assert(elem->variable->sharing_weight > 0);
875 if (elem->variable->value > 0) continue;
876 if (elem->consumption_weight > 0)
877 cnst->usage = MAX(cnst->usage, elem->consumption_weight / elem->variable->sharing_weight);
879 //If the constraint is saturated, remove it from the set of active constraints (light_tab)
880 if (not double_positive(cnst->usage, sg_maxmin_precision) ||
881 not double_positive(cnst->remaining, cnst->bound * sg_maxmin_precision)) {
882 if(cnst->cnst_light) {
883 int index = (cnst->cnst_light-cnst_light_tab);
884 XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p "
885 "\t cnst_light_tab: %p usage: %f remaining: %f bound: %f ", index,cnst_light_num, cnst,
886 cnst->cnst_light, cnst_light_tab, cnst->usage, cnst->remaining, cnst->bound);
887 cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
888 cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
890 cnst->cnst_light = nullptr;
893 cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
894 xbt_assert(cnst->active_element_set.count>0, "Should not keep a maximum constraint that has no active"
895 " element! You want to check the maxmin precision and possible rounding effects." );
899 xbt_swag_remove(var, var_list);
902 /* Find out which variables reach the maximum */
905 saturated_constraint_set->pos = 0;
907 for(pos=0; pos<cnst_light_num; pos++){
908 xbt_assert(cnst_light_tab[pos].cnst->active_element_set.count>0, "Cannot saturate more a constraint that has"
909 " no active element! You may want to change the maxmin precision (--cfg=maxmin/precision:<new_value>)"
910 " because of possible rounding effects.\n\tFor the record, the usage of this constraint is %g while "
911 "the maxmin precision to which it is compared is %g.\n\tThe usage of the previous constraint is %g.",
912 cnst_light_tab[pos].cnst->usage, sg_maxmin_precision, cnst_light_tab[pos-1].cnst->usage);
913 saturated_constraint_set_update(cnst_light_tab[pos].remaining_over_usage, pos, saturated_constraint_set,
917 saturated_variable_set_update(cnst_light_tab, saturated_constraint_set, sys);
919 } while (cnst_light_num > 0);
922 if (sys->selective_update_active)
923 lmm_remove_all_modified_set(sys);
925 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
929 lmm_check_concurrency(sys);
931 xbt_free(saturated_constraint_set->data);
932 xbt_free(saturated_constraint_set);
933 xbt_free(cnst_light_tab);
937 /** \brief Attribute the value bound to var->bound.
939 * \param sys the lmm_system_t
940 * \param var the lmm_variable_t
941 * \param bound the new bound to associate with var
943 * Makes var->bound equal to bound. Whenever this function is called a change is signed in the system. To
944 * avoid false system changing detection it is a good idea to test (bound != 0) before calling it.
946 void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var, double bound)
951 if (var->cnsts_number)
952 lmm_update_modified_set(sys, var->cnsts[0].constraint);
955 int lmm_concurrency_slack(lmm_constraint_t cnstr){
956 //FIXME MARTIN: Replace by infinite value std::numeric_limits<int>::(max)(), or something better within Simgrid?
957 if(cnstr->concurrency_limit<0)
960 return cnstr->concurrency_limit - cnstr->concurrency_current;
963 /** \brief Measure the minimum concurrency slack across all constraints where the given var is involved */
964 int lmm_cnstrs_min_concurrency_slack(lmm_variable_t var){
965 int minslack = std::numeric_limits<int>::max();
966 for (int i = 0; i < var->cnsts_number; i++) {
967 int slack = lmm_concurrency_slack(var->cnsts[i].constraint);
969 //This is only an optimization, to avoid looking at more constraints when slack is already zero
970 //Disable it when debugging to let lmm_concurrency_slack catch nasty things
971 if (not slack && not XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug))
981 /* /Check if a variable can be enabled
983 * Make sure to set staged_weight before, if your intent is only to check concurrency
985 int lmm_can_enable_var(lmm_variable_t var){
986 return var->staged_weight>0 && lmm_cnstrs_min_concurrency_slack(var)>=var->concurrency_share;
989 //Small remark: In this implementation of lmm_enable_var and lmm_disable_var, we will meet multiple times with var when
990 // running lmm_update_modified_set.
991 //A priori not a big performance issue, but we might do better by calling lmm_update_modified_set within the for loops
992 // (after doing the first for enabling==1, and before doing the last for disabling==1)
993 void lmm_enable_var(lmm_system_t sys, lmm_variable_t var){
997 xbt_assert(lmm_can_enable_var(var));
999 var->sharing_weight = var->staged_weight;
1000 var->staged_weight = 0;
1002 //Enabling the variable, move to var to list head. Subtility is: here, we need to call lmm_update_modified_set AFTER
1003 // moving at least one element of var.
1005 xbt_swag_remove(var, &(sys->variable_set));
1006 xbt_swag_insert_at_head(var, &(sys->variable_set));
1007 for (i = 0; i < var->cnsts_number; i++) {
1008 elem = &var->cnsts[i];
1009 xbt_swag_remove(elem, &(elem->constraint->disabled_element_set));
1010 xbt_swag_insert_at_head(elem, &(elem->constraint->enabled_element_set));
1011 lmm_increase_concurrency(elem);
1013 if (var->cnsts_number)
1014 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1016 //When used within lmm_on_disabled_var, we would get an assertion fail, because transiently there can be variables
1017 // that are staged and could be activated.
1018 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1019 // lmm_check_concurrency(sys);
1022 void lmm_disable_var(lmm_system_t sys, lmm_variable_t var){
1026 xbt_assert(not var->staged_weight, "Staged weight should have been cleared");
1027 //Disabling the variable, move to var to list tail. Subtility is: here, we need to call lmm_update_modified_set BEFORE
1028 //moving the last element of var.
1029 xbt_swag_remove(var, &(sys->variable_set));
1030 xbt_swag_insert_at_tail(var, &(sys->variable_set));
1031 if (var->cnsts_number)
1032 lmm_update_modified_set(sys, var->cnsts[0].constraint);
1033 for (i = 0; i < var->cnsts_number; i++) {
1034 elem = &var->cnsts[i];
1035 xbt_swag_remove(elem, &(elem->constraint->enabled_element_set));
1036 xbt_swag_insert_at_tail(elem, &(elem->constraint->disabled_element_set));
1038 xbt_swag_remove(elem, &(elem->constraint->active_element_set));
1040 lmm_decrease_concurrency(elem);
1043 var->sharing_weight = 0.0;
1044 var->staged_weight=0.0;
1046 lmm_check_concurrency(sys);
1049 /* /brief Find variables that can be enabled and enable them.
1051 * Assuming that the variable has already been removed from non-zero weights
1052 * Can we find a staged variable to add?
1053 * If yes, check that none of the constraints that this variable is involved in is at the limit of its concurrency
1054 * And then add it to enabled variables
1056 void lmm_on_disabled_var(lmm_system_t sys, lmm_constraint_t cnstr){
1058 if(cnstr->concurrency_limit<0)
1061 int numelem = xbt_swag_size(&(cnstr->disabled_element_set));
1065 lmm_element_t elem = (lmm_element_t)xbt_swag_getFirst(&(cnstr->disabled_element_set));
1067 //Cannot use xbt_swag_foreach, because lmm_enable_var will modify disabled_element_set.. within the loop
1068 while (numelem-- && elem) {
1070 lmm_element_t nextelem = (lmm_element_t)xbt_swag_getNext(elem, cnstr->disabled_element_set.offset);
1072 if (elem->variable->staged_weight>0 ){
1073 //Found a staged variable
1074 //TODOLATER: Add random timing function to model reservation protocol fuzziness? Then how to make sure that
1075 //staged variables will eventually be called?
1076 if(lmm_can_enable_var(elem->variable)){
1077 lmm_enable_var(sys,elem->variable);
1081 xbt_assert(cnstr->concurrency_current<=cnstr->concurrency_limit,"Concurrency overflow!");
1082 if(cnstr->concurrency_current==cnstr->concurrency_limit)
1088 //We could get an assertion fail, because transiently there can be variables that are staged and could be activated.
1089 //And we need to go through all constraints of the disabled var before getting back a coherent state.
1090 //Anyway, caller functions all call lmm_check_concurrency() in the end.
1091 // lmm_check_concurrency(sys);
1094 /* \brief update the weight of a variable, and enable/disable it.
1095 * @return Returns whether a change was made
1097 void lmm_update_variable_weight(lmm_system_t sys, lmm_variable_t var, double weight)
1100 xbt_assert(weight>=0,"Variable weight should not be negative!");
1102 if (weight == var->sharing_weight)
1105 int enabling_var = (weight > 0 && var->sharing_weight <= 0);
1106 int disabling_var = (weight <= 0 && var->sharing_weight > 0);
1108 XBT_IN("(sys=%p, var=%p, weight=%f)", sys, var, weight);
1112 //Are we enabling this variable?
1114 var->staged_weight = weight;
1115 int minslack = lmm_cnstrs_min_concurrency_slack(var);
1116 if (minslack < var->concurrency_share) {
1117 XBT_DEBUG("Staging var (instead of enabling) because min concurrency slack %i, with weight %f and concurrency"
1118 " share %i", minslack, weight, var->concurrency_share);
1121 XBT_DEBUG("Enabling var with min concurrency slack %i", minslack);
1122 lmm_enable_var(sys,var);
1123 } else if (disabling_var){
1124 //Are we disabling this variable?
1125 lmm_disable_var(sys,var);
1127 var->sharing_weight = weight;
1130 lmm_check_concurrency(sys);
1135 double lmm_get_variable_weight(lmm_variable_t var)
1137 return var->sharing_weight;
1140 void lmm_update_constraint_bound(lmm_system_t sys, lmm_constraint_t cnst, double bound)
1143 lmm_update_modified_set(sys, cnst);
1144 cnst->bound = bound;
1147 int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
1149 return xbt_swag_belongs(cnst, &(sys->active_constraint_set));
1152 inline lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys)
1154 return (lmm_constraint_t)xbt_swag_getFirst(&(sys->active_constraint_set));
1157 inline lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys, lmm_constraint_t cnst)
1159 return (lmm_constraint_t)xbt_swag_getNext(cnst, (sys->active_constraint_set).offset);
1162 /** \brief Update the constraint set propagating recursively to
1163 * other constraints so the system should not be entirely computed.
1165 * \param sys the lmm_system_t
1166 * \param cnst the lmm_constraint_t affected by the change
1168 * A recursive algorithm to optimize the system recalculation selecting only constraints that have changed. Each
1169 * constraint change is propagated to the list of constraints for each variable.
1171 static void lmm_update_modified_set_rec(lmm_system_t sys, lmm_constraint_t cnst)
1175 //TODOLATER: Why lmm_modified_set has been changed in git version 2392B5157...? Looks equivalent logically and less obvious..
1176 xbt_swag_foreach(_elem, &cnst->enabled_element_set) {
1177 lmm_variable_t var = ((lmm_element_t)_elem)->variable;
1178 s_lmm_element_t *cnsts = var->cnsts;
1180 for (i = 0; var->visited != sys->visited_counter && i < var->cnsts_number ; i++) {
1181 if (cnsts[i].constraint != cnst && not xbt_swag_belongs(cnsts[i].constraint, &sys->modified_constraint_set)) {
1182 xbt_swag_insert(cnsts[i].constraint, &sys->modified_constraint_set);
1183 lmm_update_modified_set_rec(sys, cnsts[i].constraint);
1186 //var will be ignored in later visits as long as sys->visited_counter does not move
1187 var->visited = sys->visited_counter;
1191 static void lmm_update_modified_set(lmm_system_t sys, lmm_constraint_t cnst)
1193 /* nothing to do if selective update isn't active */
1194 if (sys->selective_update_active && not xbt_swag_belongs(cnst, &sys->modified_constraint_set)) {
1195 xbt_swag_insert(cnst, &sys->modified_constraint_set);
1196 lmm_update_modified_set_rec(sys, cnst);
1200 /** \brief Remove all constraints of the modified_constraint_set.
1202 * \param sys the lmm_system_t
1204 static void lmm_remove_all_modified_set(lmm_system_t sys)
1206 //We cleverly un-flag all variables just by incrementing sys->visited_counter
1207 //In effect, the var->visited value will no more be equal to sys->visited counter
1208 //To be clean, when visited counter has wrapped around, we force these var->visited values so that variables that
1209 //were in the modified a long (long long) time ago are not wrongly skipped here, which would lead to very nasty bugs
1210 //(i.e. not readibily reproducible, and requiring a lot of run time before happening).
1211 if (++sys->visited_counter == 1) {
1212 /* the counter wrapped around, reset each variable->visited */
1214 xbt_swag_foreach(_var, &sys->variable_set)
1215 ((lmm_variable_t)_var)->visited = 0;
1217 xbt_swag_reset(&sys->modified_constraint_set);
1221 * Returns resource load (in flop per second, or byte per second, or similar)
1223 * If the resource is shared (the default case), the load is sum of
1224 * resource usage made by every variables located on this resource.
1226 * If the resource is not shared (ie in FATPIPE mode), then the the
1227 * load is the max (not the sum) of all resource usages located on this resource.
1229 * \param cnst the lmm_constraint_t associated to the resource
1231 double lmm_constraint_get_usage(lmm_constraint_t cnst) {
1233 xbt_swag_t elem_list = &(cnst->enabled_element_set);
1236 xbt_swag_foreach(_elem, elem_list) {
1237 lmm_element_t elem = (lmm_element_t)_elem;
1238 if (elem->consumption_weight > 0) {
1239 if (cnst->sharing_policy)
1240 usage += elem->consumption_weight * elem->variable->value;
1241 else if (usage < elem->consumption_weight * elem->variable->value)
1242 usage = std::max(usage, elem->consumption_weight * elem->variable->value);
1247 int lmm_constraint_get_variable_amount(lmm_constraint_t cnst) {
1249 xbt_swag_t elem_list = &(cnst->enabled_element_set);
1252 xbt_swag_foreach(_elem, elem_list) {
1253 lmm_element_t elem = (lmm_element_t)_elem;
1254 if (elem->consumption_weight > 0)
1260 void lmm_check_concurrency(lmm_system_t sys){
1261 //These checks are very expensive, so do them only if we want to debug SURF LMM
1262 if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
1264 xbt_swag_foreach(cnstIt, &(sys->constraint_set))
1266 lmm_constraint_t cnst = (lmm_constraint_t)cnstIt;
1267 int concurrency = 0;
1269 xbt_swag_foreach(elemIt, &(cnst->enabled_element_set))
1271 lmm_element_t elem = (lmm_element_t)elemIt;
1272 xbt_assert(elem->variable->sharing_weight > 0);
1273 concurrency+=lmm_element_concurrency(elem);
1276 xbt_swag_foreach(elemIt, &(cnst->disabled_element_set))
1278 lmm_element_t elem = (lmm_element_t)elemIt;
1279 //We should have staged variables only if concurrency is reached in some constraint
1280 xbt_assert(cnst->concurrency_limit<0 || elem->variable->staged_weight==0 ||
1281 lmm_cnstrs_min_concurrency_slack(elem->variable) < elem->variable->concurrency_share,
1282 "should not have staged variable!");
1285 xbt_assert(cnst->concurrency_limit<0 || cnst->concurrency_limit >= concurrency,"concurrency check failed!");
1286 xbt_assert(cnst->concurrency_current == concurrency, "concurrency_current is out-of-date!");
1289 //Check that for each variable, all corresponding elements are in the same state (i.e. same element sets)
1291 xbt_swag_foreach(varIt, &(sys->variable_set))
1293 lmm_variable_t var = (lmm_variable_t)varIt;
1295 if (not var->cnsts_number)
1298 lmm_element_t elem = &var->cnsts[0];
1299 int belong_to_enabled = xbt_swag_belongs(elem, &(elem->constraint->enabled_element_set));
1300 int belong_to_disabled = xbt_swag_belongs(elem, &(elem->constraint->disabled_element_set));
1301 int belong_to_active = xbt_swag_belongs(elem, &(elem->constraint->active_element_set));
1303 for (int i = 1; i < var->cnsts_number; i++) {
1304 elem = &var->cnsts[i];
1305 xbt_assert(belong_to_enabled==xbt_swag_belongs(elem,&(elem->constraint->enabled_element_set)),
1306 "Variable inconsistency (1): enabled_element_set");
1307 xbt_assert(belong_to_disabled==xbt_swag_belongs(elem,&(elem->constraint->disabled_element_set)),
1308 "Variable inconsistency (2): disabled_element_set");
1309 xbt_assert(belong_to_active==xbt_swag_belongs(elem,&(elem->constraint->active_element_set)),
1310 "Variable inconsistency (3): active_element_set");