+++ /dev/null
-/* Copyright (c) 2007-2011. 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 "maxmin_private.h"
-#include <stdlib.h>
-#include <math.h>
-
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_maxmin);
-#define SHOW_EXPR_G(expr) XBT_DEBUG(#expr " = %g",expr);
-#define SHOW_EXPR_D(expr) XBT_DEBUG(#expr " = %d",expr);
-#define SHOW_EXPR_P(expr) XBT_DEBUG(#expr " = %p",expr);
-
-void bottleneck_solve(lmm_system_t sys)
-{
- lmm_variable_t var = NULL;
- lmm_variable_t var_next = NULL;
- lmm_constraint_t cnst = NULL;
- s_lmm_constraint_t s_cnst;
- 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;
- int i;
-
- static s_xbt_swag_t cnst_to_update;
-
- if (!(sys->modified))
- return;
-
- /* Init */
- xbt_swag_init(&(cnst_to_update),
- xbt_swag_offset(s_cnst, saturated_constraint_set_hookup));
-
- var_list = &(sys->variable_set);
- XBT_DEBUG("Variable set : %d", xbt_swag_size(var_list));
- xbt_swag_foreach(var, var_list) {
- int nb = 0;
- var->value = 0.0;
- XBT_DEBUG("Handling variable %p", var);
- xbt_swag_insert(var, &(sys->saturated_variable_set));
- for (i = 0; i < var->cnsts_number; i++) {
- if (var->cnsts[i].value == 0.0)
- nb++;
- }
- if ((nb == var->cnsts_number) && (var->weight > 0.0)) {
- XBT_DEBUG("Err, finally, there is no need to take care of variable %p",
- var);
- xbt_swag_remove(var, &(sys->saturated_variable_set));
- var->value = 1.0;
- }
- if (var->weight <= 0.0) {
- XBT_DEBUG("Err, finally, there is no need to take care of variable %p",
- var);
- xbt_swag_remove(var, &(sys->saturated_variable_set));
- }
- }
- var_list = &(sys->saturated_variable_set);
-
- cnst_list = &(sys->active_constraint_set);
- XBT_DEBUG("Active constraints : %d", xbt_swag_size(cnst_list));
- xbt_swag_foreach(cnst, cnst_list) {
- xbt_swag_insert(cnst, &(sys->saturated_constraint_set));
- }
- cnst_list = &(sys->saturated_constraint_set);
- xbt_swag_foreach(cnst, cnst_list) {
- cnst->remaining = cnst->bound;
- cnst->usage = 0.0;
- }
-
- XBT_DEBUG("Fair bottleneck Initialized");
-
- /*
- * Compute Usage and store the variables that reach the maximum.
- */
- do {
- if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
- XBT_DEBUG("Fair bottleneck done");
- lmm_print(sys);
- }
- XBT_DEBUG("******* Constraints to process: %d *******",
- xbt_swag_size(cnst_list));
- xbt_swag_foreach_safe(cnst, cnst_next, cnst_list) {
- int nb = 0;
- XBT_DEBUG("Processing cnst %p ", cnst);
- elem_list = &(cnst->element_set);
- cnst->usage = 0.0;
- xbt_swag_foreach(elem, elem_list) {
- if (elem->variable->weight <= 0)
- break;
- if ((elem->value > 0)
- && xbt_swag_belongs(elem->variable, var_list))
- nb++;
- }
- XBT_DEBUG("\tThere are %d variables", nb);
- if (nb > 0 && !cnst->shared)
- nb = 1;
- if (!nb) {
- cnst->remaining = 0.0;
- cnst->usage = cnst->remaining;
- xbt_swag_remove(cnst, cnst_list);
- continue;
- }
- cnst->usage = cnst->remaining / nb;
- XBT_DEBUG("\tConstraint Usage %p : %f with %d variables", cnst,
- cnst->usage, nb);
- }
-
- xbt_swag_foreach_safe(var, var_next, var_list) {
- double min_inc =
- var->cnsts[0].constraint->usage / var->cnsts[0].value;
- for (i = 1; i < var->cnsts_number; i++) {
- lmm_element_t elm = &var->cnsts[i];
- min_inc = MIN(min_inc, elm->constraint->usage / elm->value);
- }
- if (var->bound > 0)
- min_inc = MIN(min_inc, var->bound - var->value);
- var->mu = min_inc;
- XBT_DEBUG("Updating variable %p maximum increment: %g", var, var->mu);
- var->value += var->mu;
- if (var->value == var->bound) {
- xbt_swag_remove(var, var_list);
- }
- }
-
- xbt_swag_foreach_safe(cnst, cnst_next, cnst_list) {
- XBT_DEBUG("Updating cnst %p ", cnst);
- elem_list = &(cnst->element_set);
- xbt_swag_foreach(elem, elem_list) {
- if (elem->variable->weight <= 0)
- break;
- if (cnst->shared) {
- XBT_DEBUG("\tUpdate constraint %p (%g) with variable %p by %g",
- cnst, cnst->remaining, elem->variable,
- elem->variable->mu);
- double_update(&(cnst->remaining),
- elem->value * elem->variable->mu);
- } else {
- XBT_DEBUG
- ("\tNon-Shared variable. Update constraint usage of %p (%g) with variable %p by %g",
- cnst, cnst->usage, elem->variable, elem->variable->mu);
- cnst->usage = MIN(cnst->usage, elem->value * elem->variable->mu);
- }
- }
- if (!cnst->shared) {
- XBT_DEBUG("\tUpdate constraint %p (%g) by %g",
- cnst, cnst->remaining, cnst->usage);
-
- double_update(&(cnst->remaining), cnst->usage);
- }
-
- XBT_DEBUG("\tRemaining for %p : %g", cnst, cnst->remaining);
- if (cnst->remaining == 0.0) {
- XBT_DEBUG("\tGet rid of constraint %p", cnst);
-
- xbt_swag_remove(cnst, cnst_list);
- xbt_swag_foreach(elem, elem_list) {
- if (elem->variable->weight <= 0)
- break;
- if (elem->value > 0) {
- XBT_DEBUG("\t\tGet rid of variable %p", elem->variable);
- xbt_swag_remove(elem->variable, var_list);
- }
- }
- }
- }
- } while (xbt_swag_size(var_list));
-
- xbt_swag_reset(cnst_list);
- sys->modified = 0;
- if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
- XBT_DEBUG("Fair bottleneck done");
- lmm_print(sys);
- }
-}
