+++ /dev/null
-/* Copyright (c) 2004-2013. The SimGrid Team.
- * All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-
-#include "xbt/sysdep.h"
-#include "xbt/log.h"
-#include "xbt/mallocator.h"
-#include "maxmin_private.h"
-#include <stdlib.h>
-#include <stdio.h> /* sprintf */
-#include <math.h>
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_maxmin, surf,
- "Logging specific to SURF (maxmin)");
-
-typedef struct s_dyn_light {
- int *data;
- int pos;
- int size;
-} s_dyn_light_t, *dyn_light_t;
-
-XBT_EXPORT_NO_IMPORT(double) sg_maxmin_precision = 0.00001;
-
-static void *lmm_variable_mallocator_new_f(void);
-static void lmm_variable_mallocator_free_f(void *var);
-#define lmm_variable_mallocator_reset_f ((void_f_pvoid_t)NULL)
-static void lmm_update_modified_set(lmm_system_t sys,
- lmm_constraint_t cnst);
-static void lmm_remove_all_modified_set(lmm_system_t sys);
-static int Global_debug_id = 1;
-static int Global_const_debug_id = 1;
-
-static void lmm_var_free(lmm_system_t sys, lmm_variable_t var);
-static XBT_INLINE void lmm_cnst_free(lmm_system_t sys,
- lmm_constraint_t cnst);
-
-lmm_system_t lmm_system_new(int selective_update)
-{
- lmm_system_t l = NULL;
- s_lmm_variable_t var;
- s_lmm_constraint_t cnst;
-
- l = xbt_new0(s_lmm_system_t, 1);
-
- l->modified = 0;
- l->selective_update_active = selective_update;
- l->visited_counter = 1;
-
- XBT_DEBUG("Setting selective_update_active flag to %d\n",
- l->selective_update_active);
-
- xbt_swag_init(&(l->variable_set),
- xbt_swag_offset(var, variable_set_hookup));
- xbt_swag_init(&(l->constraint_set),
- xbt_swag_offset(cnst, constraint_set_hookup));
-
- xbt_swag_init(&(l->active_constraint_set),
- xbt_swag_offset(cnst, active_constraint_set_hookup));
-
- xbt_swag_init(&(l->modified_constraint_set),
- xbt_swag_offset(cnst, modified_constraint_set_hookup));
- xbt_swag_init(&(l->saturated_variable_set),
- xbt_swag_offset(var, saturated_variable_set_hookup));
- xbt_swag_init(&(l->saturated_constraint_set),
- xbt_swag_offset(cnst, saturated_constraint_set_hookup));
-
- l->variable_mallocator = xbt_mallocator_new(65536,
- lmm_variable_mallocator_new_f,
- lmm_variable_mallocator_free_f,
- lmm_variable_mallocator_reset_f);
-
- return l;
-}
-
-void lmm_system_free(lmm_system_t sys)
-{
- lmm_variable_t var = NULL;
- lmm_constraint_t cnst = NULL;
-
- while ((var = extract_variable(sys))) {
- XBT_WARN
- ("Variable %p (%d) still in LMM system when freing it: this may be a bug",
- var, var->id_int);
- lmm_var_free(sys, var);
- }
-
- while ((cnst = extract_constraint(sys)))
- lmm_cnst_free(sys, cnst);
-
- xbt_mallocator_free(sys->variable_mallocator);
- free(sys);
-}
-
-static XBT_INLINE void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var)
-{
- int i;
- int n;
-
- lmm_element_t elem = NULL;
-
- XBT_IN("(sys=%p, var=%p)", sys, var);
- sys->modified = 1;
-
- n = 0;
- for (i = 0; i < var->cnsts_number; i++) {
- elem = &var->cnsts[i];
- xbt_swag_remove(elem, &(elem->constraint->element_set));
- xbt_swag_remove(elem, &(elem->constraint->active_element_set));
- if (!xbt_swag_size(&(elem->constraint->element_set)))
- make_constraint_inactive(sys, elem->constraint);
- else {
- if (n < i)
- var->cnsts[n].constraint = elem->constraint;
- n++;
- }
- }
- if (n) {
- var->cnsts_number = n;
- lmm_update_modified_set(sys, var->cnsts[0].constraint);
- }
-
- var->cnsts_number = 0;
- XBT_OUT();
-}
-
-static void lmm_var_free(lmm_system_t sys, lmm_variable_t var)
-{
-
- lmm_variable_disable(sys, var);
- xbt_mallocator_release(sys->variable_mallocator, var);
-}
-
-static XBT_INLINE void lmm_cnst_free(lmm_system_t sys,
- lmm_constraint_t cnst)
-{
-/* xbt_assert(xbt_swag_size(&(cnst->element_set)), */
-/* "This list should be empty!"); */
- make_constraint_inactive(sys, cnst);
- free(cnst);
-}
-
-lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id,
- double bound_value)
-{
- lmm_constraint_t cnst = NULL;
- s_lmm_element_t elem;
-
- cnst = xbt_new0(s_lmm_constraint_t, 1);
- cnst->id = id;
- cnst->id_int = Global_const_debug_id++;
- xbt_swag_init(&(cnst->element_set),
- xbt_swag_offset(elem, element_set_hookup));
- xbt_swag_init(&(cnst->active_element_set),
- xbt_swag_offset(elem, active_element_set_hookup));
-
- cnst->bound = bound_value;
- cnst->usage = 0;
- cnst->shared = 1;
- insert_constraint(sys, cnst);
-
- return cnst;
-}
-
-XBT_INLINE void lmm_constraint_shared(lmm_constraint_t cnst)
-{
- cnst->shared = 0;
-}
-
-XBT_INLINE int lmm_constraint_is_shared(lmm_constraint_t cnst)
-{
- return (cnst->shared);
-}
-
-XBT_INLINE void lmm_constraint_free(lmm_system_t sys,
- lmm_constraint_t cnst)
-{
- remove_constraint(sys, cnst);
- lmm_cnst_free(sys, cnst);
-}
-
-static void *lmm_variable_mallocator_new_f(void)
-{
- lmm_variable_t var = xbt_new(s_lmm_variable_t, 1);
- var->cnsts = NULL; /* will be created by realloc */
- return var;
-}
-
-static void lmm_variable_mallocator_free_f(void *var)
-{
- xbt_free(((lmm_variable_t) var)->cnsts);
- xbt_free(var);
-}
-
-lmm_variable_t lmm_variable_new(lmm_system_t sys, void *id,
- double weight,
- double bound, int number_of_constraints)
-{
- lmm_variable_t var = NULL;
- int i;
-
- XBT_IN("(sys=%p, id=%p, weight=%f, bound=%f, num_cons =%d)",
- sys, id, weight, bound, number_of_constraints);
-
- var = xbt_mallocator_get(sys->variable_mallocator);
- var->id = id;
- var->id_int = Global_debug_id++;
- var->cnsts = xbt_realloc(var->cnsts, number_of_constraints * sizeof(s_lmm_element_t));
- for (i = 0; i < number_of_constraints; i++) {
- var->cnsts[i].element_set_hookup.next = NULL;
- var->cnsts[i].element_set_hookup.prev = NULL;
- var->cnsts[i].active_element_set_hookup.next = NULL;
- var->cnsts[i].active_element_set_hookup.prev = NULL;
- var->cnsts[i].constraint = NULL;
- var->cnsts[i].variable = NULL;
- var->cnsts[i].value = 0.0;
- }
- var->cnsts_size = number_of_constraints;
- var->cnsts_number = 0;
- var->weight = weight;
- var->bound = bound;
- var->value = 0.0;
- var->visited = sys->visited_counter - 1;
- var->mu = 0.0;
- var->new_mu = 0.0;
- var->func_f = func_f_def;
- var->func_fp = func_fp_def;
- var->func_fpi = func_fpi_def;
-
- var->variable_set_hookup.next = NULL;
- var->variable_set_hookup.prev = NULL;
- var->saturated_variable_set_hookup.next = NULL;
- var->saturated_variable_set_hookup.prev = NULL;
-
- if (weight)
- xbt_swag_insert_at_head(var, &(sys->variable_set));
- else
- xbt_swag_insert_at_tail(var, &(sys->variable_set));
-
- XBT_OUT(" returns %p", var);
- return var;
-}
-
-void lmm_variable_free(lmm_system_t sys, lmm_variable_t var)
-{
- remove_variable(sys, var);
- lmm_var_free(sys, var);
-}
-
-XBT_INLINE double lmm_variable_getvalue(lmm_variable_t var)
-{
- return (var->value);
-}
-
-XBT_INLINE double lmm_variable_getbound(lmm_variable_t var)
-{
- return (var->bound);
-}
-
-/* Replace the content of elem_a with elem_b. The content of elem_b is cleared. */
-static void renew_elem_entry(lmm_element_t elem_a, lmm_element_t elem_b)
-{
- elem_a->constraint = elem_b->constraint;
- elem_a->variable = elem_b->variable;
- elem_a->value = elem_b->value;
-
- /* If elem_b is in the element_set swag, register the new element to the swag. */
- if (xbt_swag_remove(elem_b, &(elem_b->constraint->element_set))) {
- if (elem_a->variable->weight)
- xbt_swag_insert_at_head(elem_a, &(elem_a->constraint->element_set));
- else
- xbt_swag_insert_at_tail(elem_a, &(elem_a->constraint->element_set));
- }
-
- if (xbt_swag_remove(elem_b, &(elem_b->constraint->active_element_set))) {
- if (elem_a->variable->weight)
- xbt_swag_insert_at_head(elem_a, &(elem_a->constraint->active_element_set));
- else
- xbt_swag_insert_at_tail(elem_a, &(elem_a->constraint->active_element_set));
- }
-
- elem_b->constraint = NULL;
- elem_b->variable = NULL;
- elem_b->value = 0;
-}
-
-void lmm_shrink(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var)
-{
- lmm_element_t elem = NULL;
- int found = 0;
-
- int i;
- for (i = 0; i < var->cnsts_number; i++) {
- elem = &(var->cnsts[i]);
- if (elem->constraint == cnst) {
- found = 1;
- break;
- }
- }
-
- if (!found) {
- XBT_DEBUG("cnst %p is not found in var %p", cnst, var);
- return;
- }
-
- sys->modified = 1;
-
- XBT_DEBUG("remove elem(value %lf, cnst %p, var %p) in var %p",
- elem->value, elem->constraint, elem->variable, var);
-
-
-
- /* We are going to change the constraint object and the variable object.
- * Propagate this change to other objects. Calling here (not after
- * modification) is correct? */
- lmm_update_modified_set(sys, cnst);
- lmm_update_modified_set(sys, var->cnsts[0].constraint); // will look up element_set of this constraint, and then each var in the element_set, and each var->cnsts[i].
-
-
-
- /* now var->cnsts[i] is not necessary any more */
-
- xbt_swag_remove(elem, &(elem->constraint->element_set));
- xbt_swag_remove(elem, &(elem->constraint->active_element_set));
- elem->constraint = NULL;
- elem->variable = NULL;
- elem->value = 0;
-
-
-
- /* We do not want to have an empty element entry before the last entry. So,
- * plug up the hole with the last one. */
- if (i < var->cnsts_number - 1)
- renew_elem_entry(&var->cnsts[i], &var->cnsts[var->cnsts_number - 1]);
-
- var->cnsts_number -= 1;
-
-
- if (xbt_swag_size(&(cnst->element_set)) == 0)
- make_constraint_inactive(sys, cnst);
-}
-
-void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, double value)
-{
- lmm_element_t elem = NULL;
-
- sys->modified = 1;
-
- xbt_assert(var->cnsts_number < var->cnsts_size, "Too much constraints");
-
- elem = &(var->cnsts[var->cnsts_number++]);
-
- elem->value = value;
- elem->constraint = cnst;
- elem->variable = var;
-
- if (var->weight)
- xbt_swag_insert_at_head(elem, &(elem->constraint->element_set));
- else
- xbt_swag_insert_at_tail(elem, &(elem->constraint->element_set));
- if(!sys->selective_update_active) {
- make_constraint_active(sys, cnst);
- } else if(elem->value>0 || var->weight >0) {
- make_constraint_active(sys, cnst);
- lmm_update_modified_set(sys, cnst);
- if (var->cnsts_number > 1)
- lmm_update_modified_set(sys, var->cnsts[0].constraint);
- }
-}
-
-void lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, double value)
-{
- int i;
- sys->modified = 1;
-
- for (i = 0; i < var->cnsts_number; i++)
- if (var->cnsts[i].constraint == cnst)
- break;
-
- if (i < var->cnsts_number) {
- if (cnst->shared)
- var->cnsts[i].value += value;
- else
- var->cnsts[i].value = MAX(var->cnsts[i].value, value);
- lmm_update_modified_set(sys, cnst);
- } else
- lmm_expand(sys, cnst, var, value);
-}
-
-void lmm_elem_set_value(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, double value)
-{
- int i;
-
- for (i = 0; i < var->cnsts_number; i++)
- if (var->cnsts[i].constraint == cnst)
- break;
-
- if (i < var->cnsts_number) {
- var->cnsts[i].value = value;
- sys->modified = 1;
- lmm_update_modified_set(sys, cnst);
- } else
- DIE_IMPOSSIBLE;
-}
-
-XBT_INLINE lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t sys,
- lmm_variable_t var,
- int num)
-{
- if (num < var->cnsts_number)
- return (var->cnsts[num].constraint);
- else
- return NULL;
-}
-
-XBT_INLINE double lmm_get_cnst_weight_from_var(lmm_system_t sys,
- lmm_variable_t var,
- int num)
-{
- if (num < var->cnsts_number)
- return (var->cnsts[num].value);
- else
- return 0.0;
-}
-
-XBT_INLINE int lmm_get_number_of_cnst_from_var(lmm_system_t sys,
- lmm_variable_t var)
-{
- return (var->cnsts_number);
-}
-
-lmm_variable_t lmm_get_var_from_cnst(lmm_system_t sys,
- lmm_constraint_t cnst,
- lmm_element_t * elem)
-{
- if (!(*elem))
- *elem = xbt_swag_getFirst(&(cnst->element_set));
- else
- *elem = xbt_swag_getNext(*elem, cnst->element_set.offset);
- if (*elem)
- return (*elem)->variable;
- else
- return NULL;
-}
-
-XBT_INLINE void *lmm_constraint_id(lmm_constraint_t cnst)
-{
- return cnst->id;
-}
-
-XBT_INLINE void *lmm_variable_id(lmm_variable_t var)
-{
- return var->id;
-}
-
-static XBT_INLINE void saturated_constraint_set_update(double usage,
- int cnst_light_num,
- dyn_light_t saturated_constraint_set,
- double *min_usage)
-{
- xbt_assert(usage > 0,"Impossible");
-
- if (*min_usage < 0 || *min_usage > usage) {
- *min_usage = usage;
- // XBT_HERE(" min_usage=%f (cnst->remaining / cnst->usage =%f)", *min_usage, usage);
- saturated_constraint_set->data[0] = cnst_light_num;
- saturated_constraint_set->pos = 1;
- } else if (*min_usage == usage) {
- if(saturated_constraint_set->pos == saturated_constraint_set->size) { // realloc the size
- saturated_constraint_set->size *= 2;
- saturated_constraint_set->data = xbt_realloc(saturated_constraint_set->data, (saturated_constraint_set->size) * sizeof(int));
- }
- saturated_constraint_set->data[saturated_constraint_set->pos] = cnst_light_num;
- saturated_constraint_set->pos++;
- }
-}
-
-static XBT_INLINE void saturated_variable_set_update(
- s_lmm_constraint_light_t *cnst_light_tab,
- dyn_light_t saturated_constraint_set,
- lmm_system_t sys)
-{
- lmm_constraint_light_t cnst = NULL;
- lmm_element_t elem = NULL;
- xbt_swag_t elem_list = NULL;
- int i;
- for(i = 0; i< saturated_constraint_set->pos; i++){
- cnst = &cnst_light_tab[saturated_constraint_set->data[i]];
- elem_list = &(cnst->cnst->active_element_set);
- xbt_swag_foreach(elem, elem_list) {
- if (elem->variable->weight <= 0)
- break;
- if ((elem->value > 0))
- xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
- }
- }
-}
-
-void lmm_print(lmm_system_t sys)
-{
- lmm_constraint_t cnst = NULL;
- lmm_element_t elem = NULL;
- lmm_variable_t var = NULL;
- xbt_swag_t cnst_list = NULL;
- xbt_swag_t var_list = NULL;
- xbt_swag_t elem_list = NULL;
- char print_buf[1024];
- char *trace_buf = xbt_malloc0(sizeof(char));
- double sum = 0.0;
-
- /* Printing Objective */
- var_list = &(sys->variable_set);
- sprintf(print_buf, "MAX-MIN ( ");
- trace_buf =
- xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
- xbt_swag_foreach(var, var_list) {
- sprintf(print_buf, "'%d'(%f) ", var->id_int, var->weight);
- trace_buf =
- xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
- }
- sprintf(print_buf, ")");
- trace_buf =
- xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
- XBT_DEBUG("%20s", trace_buf);
- trace_buf[0] = '\000';
-
- XBT_DEBUG("Constraints");
- /* Printing Constraints */
- cnst_list = &(sys->active_constraint_set);
- xbt_swag_foreach(cnst, cnst_list) {
- sum = 0.0;
- elem_list = &(cnst->element_set);
- sprintf(print_buf, "\t");
- trace_buf =
- xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
- sprintf(print_buf, "%s(",(cnst->shared)?"":"max");
- trace_buf =
- xbt_realloc(trace_buf,
- strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
- xbt_swag_foreach(elem, elem_list) {
- sprintf(print_buf, "%f.'%d'(%f) %s ", elem->value,
- elem->variable->id_int, elem->variable->value,(cnst->shared)?"+":",");
- trace_buf =
- xbt_realloc(trace_buf,
- strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
- if(cnst->shared)
- sum += elem->value * elem->variable->value;
- else
- sum = MAX(sum,elem->value * elem->variable->value);
- }
- sprintf(print_buf, "0) <= %f ('%d')", cnst->bound, cnst->id_int);
- trace_buf =
- xbt_realloc(trace_buf, strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
-
- if (!cnst->shared) {
- sprintf(print_buf, " [MAX-Constraint]");
- trace_buf =
- xbt_realloc(trace_buf,
- strlen(trace_buf) + strlen(print_buf) + 1);
- strcat(trace_buf, print_buf);
- }
- XBT_DEBUG("%s", trace_buf);
- trace_buf[0] = '\000';
- xbt_assert(!double_positive(sum - cnst->bound),
- "Incorrect value (%f is not smaller than %f): %g",
- sum, cnst->bound, sum - cnst->bound);
- }
-
- XBT_DEBUG("Variables");
- /* Printing Result */
- xbt_swag_foreach(var, var_list) {
- if (var->bound > 0) {
- XBT_DEBUG("'%d'(%f) : %f (<=%f)", var->id_int, var->weight, var->value,
- var->bound);
- xbt_assert(!double_positive(var->value - var->bound),
- "Incorrect value (%f is not smaller than %f",
- var->value, var->bound);
- } else {
- XBT_DEBUG("'%d'(%f) : %f", var->id_int, var->weight, var->value);
- }
- }
-
- free(trace_buf);
-}
-
-void lmm_solve(lmm_system_t sys)
-{
- lmm_variable_t var = NULL;
- lmm_constraint_t cnst = NULL;
- lmm_constraint_t cnst_next = NULL;
- lmm_element_t elem = NULL;
- xbt_swag_t cnst_list = NULL;
- xbt_swag_t var_list = NULL;
- xbt_swag_t elem_list = NULL;
- double min_usage = -1;
- double min_bound = -1;
-
- if (!(sys->modified))
- return;
-
- XBT_IN("(sys=%p)", sys);
-
- /*
- * Compute Usage and store the variables that reach the maximum.
- */
- cnst_list =
- sys->
- selective_update_active ? &(sys->modified_constraint_set) :
- &(sys->active_constraint_set);
-
- XBT_DEBUG("Active constraints : %d", xbt_swag_size(cnst_list));
- /* Init: Only modified code portions */
- xbt_swag_foreach(cnst, cnst_list) {
- elem_list = &(cnst->element_set);
- //XBT_DEBUG("Variable set : %d", xbt_swag_size(elem_list));
- xbt_swag_foreach(elem, elem_list) {
- var = elem->variable;
- if (var->weight <= 0.0)
- break;
- var->value = 0.0;
- }
- }
-
- 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));
- int cnst_light_num = 0;
- dyn_light_t saturated_constraint_set = xbt_new0(s_dyn_light_t,1);
- saturated_constraint_set->size = 5;
- saturated_constraint_set->data = xbt_new0(int, saturated_constraint_set->size);
-
- xbt_swag_foreach_safe(cnst, cnst_next, cnst_list) {
- /* INIT */
- cnst->remaining = cnst->bound;
- if (cnst->remaining == 0)
- continue;
- cnst->usage = 0;
- elem_list = &(cnst->element_set);
- xbt_swag_foreach(elem, elem_list) {
- /* 0-weighted elements (ie, sleep actions) are at the end of the swag and we don't want to consider them */
- if (elem->variable->weight <= 0)
- break;
- if ((elem->value > 0)) {
- if (cnst->shared)
- cnst->usage += elem->value / elem->variable->weight;
- else if (cnst->usage < elem->value / elem->variable->weight)
- cnst->usage = elem->value / elem->variable->weight;
-
- make_elem_active(elem);
- if (sys->keep_track)
- xbt_swag_insert(elem->variable->id, sys->keep_track);
- }
- }
- XBT_DEBUG("Constraint Usage '%d' : %f", cnst->id_int, cnst->usage);
- /* Saturated constraints update */
-
- if(cnst->usage > 0) {
- cnst_light_tab[cnst_light_num].cnst = cnst;
- cnst->cnst_light = &(cnst_light_tab[cnst_light_num]);
- cnst_light_tab[cnst_light_num].remaining_over_usage = cnst->remaining / cnst->usage;
- saturated_constraint_set_update(cnst_light_tab[cnst_light_num].remaining_over_usage,
- cnst_light_num, saturated_constraint_set, &min_usage);
- cnst_light_num++;
- }
- }
-
- saturated_variable_set_update( cnst_light_tab,
- saturated_constraint_set,
- sys);
-
- /* Saturated variables update */
-
- do {
- /* Fix the variables that have to be */
- var_list = &(sys->saturated_variable_set);
-
- xbt_swag_foreach(var, var_list) {
- if (var->weight <= 0.0)
- DIE_IMPOSSIBLE;
- /* First check if some of these variables have reach their upper
- bound and update min_usage accordingly. */
- XBT_DEBUG
- ("var=%d, var->bound=%f, var->weight=%f, min_usage=%f, var->bound*var->weight=%f",
- var->id_int, var->bound, var->weight, min_usage,
- var->bound * var->weight);
- if ((var->bound > 0) && (var->bound * var->weight < min_usage)) {
- if (min_bound < 0)
- min_bound = var->bound;
- else
- min_bound = MIN(min_bound, var->bound);
- XBT_DEBUG("Updated min_bound=%f", min_bound);
- }
- }
-
-
- while ((var = xbt_swag_getFirst(var_list))) {
- int i;
-
- if (min_bound < 0) {
- var->value = min_usage / var->weight;
- } else {
- if (min_bound == var->bound)
- var->value = var->bound;
- else {
- xbt_swag_remove(var, var_list);
- continue;
- }
- }
- XBT_DEBUG("Min usage: %f, Var(%d)->weight: %f, Var(%d)->value: %f ",
- min_usage, var->id_int, var->weight, var->id_int, var->value);
-
-
- /* Update usage */
-
- for (i = 0; i < var->cnsts_number; i++) {
- elem = &var->cnsts[i];
- cnst = elem->constraint;
- if (cnst->shared) {
- double_update(&(cnst->remaining), elem->value * var->value);
- double_update(&(cnst->usage), elem->value / var->weight);
- if(cnst->usage<=0 || cnst->remaining<=0) {
- if (cnst->cnst_light) {
- int index = (cnst->cnst_light-cnst_light_tab);
- XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p \t cnst_light_tab: %p ",
- index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab);
- cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
- cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
- cnst_light_num--;
- cnst->cnst_light = NULL;
- }
- } else {
- cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
- }
- make_elem_inactive(elem);
- } else {
- cnst->usage = 0.0;
- make_elem_inactive(elem);
- elem_list = &(cnst->element_set);
- xbt_swag_foreach(elem, elem_list) {
- if (elem->variable->weight <= 0 || elem->variable->value > 0)
- break;
- if (elem->value > 0)
- cnst->usage = MAX(cnst->usage, elem->value / elem->variable->weight);
- }
- if (cnst->usage<=0 || cnst->remaining<=0) {
- if(cnst->cnst_light) {
- int index = (cnst->cnst_light-cnst_light_tab);
- XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p \t cnst_light_tab: %p ",
- index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab);
- cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
- cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
- cnst_light_num--;
- cnst->cnst_light = NULL;
- }
- } else {
- cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
- }
- }
- }
- xbt_swag_remove(var, var_list);
- }
-
- /* Find out which variables reach the maximum */
- min_usage = -1;
- min_bound = -1;
- saturated_constraint_set->pos = 0;
- int pos;
- for(pos=0; pos<cnst_light_num; pos++)
- saturated_constraint_set_update(
- cnst_light_tab[pos].remaining_over_usage,
- pos,
- saturated_constraint_set,
- &min_usage);
-
- saturated_variable_set_update( cnst_light_tab,
- saturated_constraint_set,
- sys);
-
- } while (cnst_light_num > 0);
-
- sys->modified = 0;
- if (sys->selective_update_active)
- lmm_remove_all_modified_set(sys);
-
- if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
- lmm_print(sys);
- }
-
- xbt_free(saturated_constraint_set->data);
- xbt_free(saturated_constraint_set);
- xbt_free(cnst_light_tab);
- XBT_OUT();
-}
-
-/* Not a O(1) function */
-
-void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, double value)
-{
- int i;
-
- for (i = 0; i < var->cnsts_number; i++)
- if (var->cnsts[i].constraint == cnst) {
- var->cnsts[i].value = value;
- sys->modified = 1;
- lmm_update_modified_set(sys, cnst);
- return;
- }
-}
-
-/** \brief Attribute the value bound to var->bound.
- *
- * \param sys the lmm_system_t
- * \param var the lmm_variable_t
- * \param bound the new bound to associate with var
- *
- * Makes var->bound equal to bound. Whenever this function is called
- * a change is signed in the system. To
- * avoid false system changing detection it is a good idea to test
- * (bound != 0) before calling it.
- *
- */
-void lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var,
- double bound)
-{
- sys->modified = 1;
- var->bound = bound;
-
- if (var->cnsts_number)
- lmm_update_modified_set(sys, var->cnsts[0].constraint);
-}
-
-
-void lmm_update_variable_weight(lmm_system_t sys, lmm_variable_t var,
- double weight)
-{
- int i;
- lmm_element_t elem;
-
- if (weight == var->weight)
- return;
- XBT_IN("(sys=%p, var=%p, weight=%f)", sys, var, weight);
- sys->modified = 1;
- var->weight = weight;
- xbt_swag_remove(var, &(sys->variable_set));
- if (weight)
- xbt_swag_insert_at_head(var, &(sys->variable_set));
- else
- xbt_swag_insert_at_tail(var, &(sys->variable_set));
-
- for (i = 0; i < var->cnsts_number; i++) {
- elem = &var->cnsts[i];
- xbt_swag_remove(elem, &(elem->constraint->element_set));
- if (weight)
- xbt_swag_insert_at_head(elem, &(elem->constraint->element_set));
- else
- xbt_swag_insert_at_tail(elem, &(elem->constraint->element_set));
-
- if (i == 0)
- lmm_update_modified_set(sys, elem->constraint);
- }
- if (!weight)
- var->value = 0.0;
-
- XBT_OUT();
-}
-
-XBT_INLINE double lmm_get_variable_weight(lmm_variable_t var)
-{
- return var->weight;
-}
-
-XBT_INLINE void lmm_update_constraint_bound(lmm_system_t sys,
- lmm_constraint_t cnst,
- double bound)
-{
- sys->modified = 1;
- lmm_update_modified_set(sys, cnst);
- cnst->bound = bound;
-}
-
-XBT_INLINE int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
-{
- return xbt_swag_belongs(cnst, &(sys->active_constraint_set));
-}
-
-XBT_INLINE lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t
- sys)
-{
- return xbt_swag_getFirst(&(sys->active_constraint_set));
-}
-
-XBT_INLINE lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t
- sys,
- lmm_constraint_t
- cnst)
-{
- return xbt_swag_getNext(cnst, (sys->active_constraint_set).offset);
-}
-
-#ifdef HAVE_LATENCY_BOUND_TRACKING
-XBT_INLINE int lmm_is_variable_limited_by_latency(lmm_variable_t var)
-{
- return (double_equals(var->bound, var->value));
-}
-#endif
-
-
-/** \brief Update the constraint set propagating recursively to
- * other constraints so the system should not be entirely computed.
- *
- * \param sys the lmm_system_t
- * \param cnst the lmm_constraint_t affected by the change
- *
- * A recursive algorithm to optimize the system recalculation selecting only
- * constraints that have changed. Each constraint change is propagated
- * to the list of constraints for each variable.
- */
-static void lmm_update_modified_set_rec(lmm_system_t sys,
- lmm_constraint_t cnst)
-{
- lmm_element_t elem;
-
- xbt_swag_foreach(elem, &cnst->element_set) {
- lmm_variable_t var = elem->variable;
- s_lmm_element_t *cnsts = var->cnsts;
- int i;
- for (i = 0; var->visited != sys->visited_counter
- && i < var->cnsts_number ; i++) {
- if (cnsts[i].constraint != cnst
- && !xbt_swag_belongs(cnsts[i].constraint,
- &sys->modified_constraint_set)) {
- xbt_swag_insert(cnsts[i].constraint, &sys->modified_constraint_set);
- lmm_update_modified_set_rec(sys, cnsts[i].constraint);
- }
- }
- var->visited = sys->visited_counter;
- }
-}
-
-static void lmm_update_modified_set(lmm_system_t sys,
- lmm_constraint_t cnst)
-{
- /* nothing to do if selective update isn't active */
- if (sys->selective_update_active
- && !xbt_swag_belongs(cnst, &sys->modified_constraint_set)) {
- xbt_swag_insert(cnst, &sys->modified_constraint_set);
- lmm_update_modified_set_rec(sys, cnst);
- }
-}
-
-/** \brief Remove all constraints of the modified_constraint_set.
- *
- * \param sys the lmm_system_t
- */
-static void lmm_remove_all_modified_set(lmm_system_t sys)
-{
- if (++sys->visited_counter == 1) {
- /* the counter wrapped around, reset each variable->visited */
- lmm_variable_t var;
- xbt_swag_foreach(var, &sys->variable_set)
- var->visited = 0;
- }
- xbt_swag_reset(&sys->modified_constraint_set);
-}
-
-/**
- * Returns total resource load
- *
- * \param cnst the lmm_constraint_t associated to the resource
- *
- */
-double lmm_constraint_get_usage(lmm_constraint_t cnst) {
- double usage = 0.0;
- xbt_swag_t elem_list = &(cnst->element_set);
- lmm_element_t elem = NULL;
-
- xbt_swag_foreach(elem, elem_list) {
- /* 0-weighted elements (ie, sleep actions) are at the end of the swag and we don't want to consider them */
- if (elem->variable->weight <= 0)
- break;
- if ((elem->value > 0)) {
- if (cnst->shared)
- usage += elem->value * elem->variable->value;
- else if (usage < elem->value * elem->variable->value)
- usage = elem->value * elem->variable->value;
- }
- }
- return usage;
-}
-
-
