-/* $Id$ */
-
-/* Copyright (c) 2004 Arnaud Legrand. All rights reserved. */
+/* Copyright (c) 2004-2011. 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/error.h"
+#include "xbt/log.h"
+#include "xbt/mallocator.h"
#include "maxmin_private.h"
#include <stdlib.h>
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(maxmin, surf,
- "Logging specific to the SURF maxmin module");
-
-lmm_system_t lmm_system_new(void)
+#include <stdio.h> /* sprintf */
+#include <math.h>
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_maxmin, surf,
+ "Logging specific to SURF (maxmin)");
+
+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;
+extern xbt_swag_t keep_track;
+
+lmm_system_t lmm_system_new(int selective_update)
{
lmm_system_t l = NULL;
s_lmm_variable_t var;
l = xbt_new0(s_lmm_system_t, 1);
l->modified = 0;
+ l->selective_update_active = selective_update;
+
+ 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_offset(var, variable_set_hookup));
xbt_swag_init(&(l->constraint_set),
- xbt_swag_offset(cnst, constraint_set_hookup));
+ xbt_swag_offset(cnst, constraint_set_hookup));
xbt_swag_init(&(l->active_constraint_set),
- xbt_swag_offset(cnst, active_constraint_set_hookup));
+ 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_offset(var, saturated_variable_set_hookup));
xbt_swag_init(&(l->saturated_constraint_set),
- xbt_swag_offset(cnst, saturated_constraint_set_hookup));
+ 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;
}
lmm_variable_t var = NULL;
lmm_constraint_t cnst = NULL;
- while ((var = extract_variable(sys)))
+ 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_free(sys);
+ xbt_mallocator_free(sys->variable_mallocator);
+ free(sys);
}
-void lmm_variable_disable(lmm_system_t sys, lmm_variable_t var)
+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_free(var->cnsts);
- xbt_free(var);
+ xbt_mallocator_release(sys->variable_mallocator, var);
}
-static void lmm_cnst_free(lmm_system_t sys, lmm_constraint_t cnst)
+static XBT_INLINE void lmm_cnst_free(lmm_system_t sys,
+ lmm_constraint_t cnst)
{
-/* xbt_assert0(xbt_swag_size(&(cnst->element_set)), */
+/* xbt_assert(xbt_swag_size(&(cnst->element_set)), */
/* "This list should be empty!"); */
- remove_active_constraint(sys, cnst);
- xbt_free(cnst);
+ make_constraint_inactive(sys, cnst);
+ free(cnst);
}
lmm_constraint_t lmm_constraint_new(lmm_system_t sys, void *id,
- double bound_value)
+ 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_offset(elem, element_set_hookup));
xbt_swag_init(&(cnst->active_element_set),
- xbt_swag_offset(elem, active_element_set_hookup));
+ xbt_swag_offset(elem, active_element_set_hookup));
cnst->bound = bound_value;
cnst->usage = 0;
+ cnst->shared = 1;
insert_constraint(sys, cnst);
return cnst;
}
-void lmm_constraint_free(lmm_system_t sys, lmm_constraint_t 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)
+ 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_new0(s_lmm_variable_t, 1);
+ var = xbt_mallocator_get(sys->variable_mallocator);
var->id = id;
- var->cnsts = xbt_new0(s_lmm_element_t, number_of_constraints);
+ 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; *//* Useless because of the calloc */
+ var->cnsts_number = 0;
var->weight = weight;
var->bound = bound;
var->value = 0.0;
- if(weight) xbt_swag_insert_at_head(var,&(sys->variable_set));
- else xbt_swag_insert_at_tail(var,&(sys->variable_set));
+ 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();
return var;
}
lmm_var_free(sys, var);
}
-double lmm_variable_getvalue(lmm_variable_t 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);
+}
+
void lmm_expand(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, double value)
+ lmm_variable_t var, double value)
{
lmm_element_t elem = NULL;
sys->modified = 1;
- xbt_assert0(var->cnsts_number < var->cnsts_size,
- "Too much constraints");
+ xbt_assert(var->cnsts_number < var->cnsts_size, "Too much constraints");
elem = &(var->cnsts[var->cnsts_number++]);
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 (var->weight)
+ xbt_swag_insert_at_head(elem, &(elem->constraint->element_set));
+ else
+ xbt_swag_insert_at_tail(elem, &(elem->constraint->element_set));
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);
}
-lmm_constraint_t lmm_get_cnst_from_var(lmm_system_t sys,
- lmm_variable_t var, int num)
+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);
return NULL;
}
-int lmm_get_number_of_cnst_from_var(lmm_system_t sys, lmm_variable_t var)
+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_variable_t * var)
+ lmm_constraint_t cnst,
+ lmm_element_t * elem)
{
- if (!(*var))
- xbt_swag_getFirst(&(cnst->element_set));
+ 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
- *var = xbt_swag_getNext(*var, cnst->element_set.offset);
- return *var;
+ return NULL;
}
-void *lmm_constraint_id(lmm_constraint_t cnst)
+XBT_INLINE void *lmm_constraint_id(lmm_constraint_t cnst)
{
return cnst->id;
}
-void *lmm_variable_id(lmm_variable_t var)
+XBT_INLINE void *lmm_variable_id(lmm_variable_t var)
{
return var->id;
}
-static void saturated_constraint_set_update(lmm_system_t sys,
- lmm_constraint_t cnst,
- double *min_usage)
+static XBT_INLINE void saturated_constraint_set_update(lmm_system_t sys,
+ lmm_constraint_t
+ cnst,
+ double *min_usage)
{
lmm_constraint_t useless_cnst = NULL;
- if (cnst->usage <= 0)
+ XBT_IN("sys=%p, cnst=%p, min_usage=%f", sys, cnst, *min_usage);
+ if (cnst->usage <= 0) {
+ XBT_OUT();
return;
- if (cnst->remaining <= 0)
+ }
+ if (cnst->remaining <= 0) {
+ XBT_OUT();
return;
+ }
if ((*min_usage < 0) || (*min_usage > cnst->remaining / cnst->usage)) {
*min_usage = cnst->remaining / cnst->usage;
-
+ XBT_LOG(xbt_log_priority_trace,
+ "min_usage=%f (cnst->remaining=%f, cnst->usage=%f)", *min_usage,
+ cnst->remaining, cnst->usage);
while ((useless_cnst =
- xbt_swag_getFirst(&(sys->saturated_constraint_set))))
+ xbt_swag_getFirst(&(sys->saturated_constraint_set))))
xbt_swag_remove(useless_cnst, &(sys->saturated_constraint_set));
xbt_swag_insert(cnst, &(sys->saturated_constraint_set));
} else if (*min_usage == cnst->remaining / cnst->usage) {
xbt_swag_insert(cnst, &(sys->saturated_constraint_set));
}
+ XBT_OUT();
}
-static void saturated_variable_set_update(lmm_system_t sys)
+static XBT_INLINE void saturated_variable_set_update(lmm_system_t sys)
{
lmm_constraint_t cnst = NULL;
xbt_swag_t cnst_list = NULL;
while ((cnst = xbt_swag_getFirst(cnst_list))) {
elem_list = &(cnst->active_element_set);
xbt_swag_foreach(elem, elem_list) {
- if(elem->variable->weight<=0) break;
+ if (elem->variable->weight <= 0)
+ break;
if ((elem->value > 0))
- xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
+ xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
}
xbt_swag_remove(cnst, cnst_list);
}
+}
+
+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)
xbt_swag_t var_list = NULL;
xbt_swag_t elem_list = NULL;
double min_usage = -1;
+ double min_bound = -1;
if (!(sys->modified))
return;
- /* Init */
- var_list = &(sys->variable_set);
- xbt_swag_foreach(var, var_list) {
- var->value = 0.0;
- }
+ 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);
- /* Compute Usage and store the variables that reach the maximum */
+ 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;
+ }
+ }
- cnst_list = &(sys->active_constraint_set);
xbt_swag_foreach(cnst, cnst_list) {
/* INIT */
- elem_list = &(cnst->element_set);
cnst->remaining = cnst->bound;
+ if (cnst->remaining == 0)
+ continue;
cnst->usage = 0;
+ elem_list = &(cnst->element_set);
xbt_swag_foreach(elem, elem_list) {
- if(elem->variable->weight <=0) break;
+ /* 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)) {
- cnst->usage += elem->value / elem->variable->weight;
- insert_active_elem_in_constraint(elem);
+ 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(keep_track){
+ xbt_swag_insert((elem->variable)->id, keep_track);
+ }
}
}
-
+ XBT_DEBUG("Constraint Usage '%d' : %f", cnst->id_int, cnst->usage);
/* Saturated constraints update */
saturated_constraint_set_update(sys, cnst, &min_usage);
}
-
saturated_variable_set_update(sys);
/* Saturated variables update */
/* 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. */
- if ((var->bound > 0) && (var->bound / var->weight < min_usage)) {
- min_usage = var->bound / var->weight;
+ 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;
- var->value = min_usage / var->weight;
+ 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;
- cnst->remaining -= elem->value * var->value;
- cnst->usage -= elem->value / var->weight;
- remove_active_elem_in_constraint(elem);
+ 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);
+ make_elem_inactive(elem);
+ } else { /* FIXME one day: We recompute usage.... :( */
+ cnst->usage = 0.0;
+ make_elem_inactive(elem);
+ elem_list = &(cnst->element_set);
+ xbt_swag_foreach(elem, elem_list) {
+ if (elem->variable->weight <= 0)
+ break;
+ if (elem->variable->value > 0)
+ break;
+ if ((elem->value > 0)) {
+ cnst->usage =
+ MAX(cnst->usage, elem->value / elem->variable->weight);
+ XBT_DEBUG("Constraint Usage %d : %f", cnst->id_int,
+ cnst->usage);
+ make_elem_active(elem);
+ }
+ }
+ }
}
xbt_swag_remove(var, var_list);
}
/* Find out which variables reach the maximum */
- cnst_list = &(sys->active_constraint_set);
min_usage = -1;
+ min_bound = -1;
xbt_swag_foreach(cnst, cnst_list) {
saturated_constraint_set_update(sys, cnst, &min_usage);
}
} while (xbt_swag_size(&(sys->saturated_variable_set)));
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_OUT();
}
/* Not a O(1) function */
void lmm_update(lmm_system_t sys, lmm_constraint_t cnst,
- lmm_variable_t var, double value)
+ 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) {
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)
+ 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)
+ 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));
-}
+ 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 (!weight)
+ var->value = 0.0;
+
+ if (var->cnsts_number)
+ lmm_update_modified_set(sys, var->cnsts[0].constraint);
+
+ XBT_OUT();
+}
-double lmm_get_variable_weight(lmm_variable_t var)
-
+XBT_INLINE double lmm_get_variable_weight(lmm_variable_t var)
{
return var->weight;
}
-void lmm_update_constraint_bound(lmm_system_t sys, lmm_constraint_t cnst,
- double bound)
+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;
}
-int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
+XBT_INLINE int lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst)
{
return xbt_swag_belongs(cnst, &(sys->active_constraint_set));
}
-lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t sys)
+XBT_INLINE lmm_constraint_t lmm_get_first_active_constraint(lmm_system_t
+ sys)
{
return xbt_swag_getFirst(&(sys->active_constraint_set));
}
-lmm_constraint_t lmm_get_next_active_constraint(lmm_system_t sys, lmm_constraint_t cnst)
+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);
+ 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(lmm_system_t sys,
+ lmm_constraint_t cnst)
+{
+ lmm_element_t elem = NULL;
+ lmm_variable_t var = NULL;
+ xbt_swag_t elem_list = NULL;
+ int i;
+
+ /* return if selective update isn't active */
+ if (!sys->selective_update_active)
+ return;
+
+ //XBT_DEBUG("Updating modified constraint set with constraint %d", cnst->id_int);
+
+ if (xbt_swag_belongs(cnst, &(sys->modified_constraint_set)))
+ return;
+
+ //XBT_DEBUG("Inserting into modified constraint set %d", cnst->id_int);
-/* void lmm_print(lmm_system_t sys) */
-/* { */
-/* lmm_variable_t var = NULL; */
-/* lmm_constraint_t cnst = NULL; */
-/* lmm_element_t elem = NULL; */
-/* xbt_swag_t cnst_list = NULL; */
-/* xbt_swag_t var_list = NULL; */
-/* xbt_swag_t elem_list = NULL; */
+ /* add to modified set */
+ xbt_swag_insert(cnst, &(sys->modified_constraint_set));
+
+ elem_list = &(cnst->element_set);
+ xbt_swag_foreach(elem, elem_list) {
+ var = elem->variable;
+ for (i = 0; i < var->cnsts_number; i++)
+ if (cnst != var->cnsts[i].constraint) {
+ //XBT_DEBUG("Updating modified %d calling for %d", cnst->id_int, var->cnsts[i].constraint->id_int);
+ lmm_update_modified_set(sys, var->cnsts[i].constraint);
+ }
+ }
+}
-/* var_list = &(sys->variable_set); */
-/* xbt_swag_foreach(var, var_list) { */
-/* printf("%s : {\n",var->id); */
-/* printf("\t %s : {\n",var->id); */
-/* } */
-/* } */
+/** \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)
+{
+ xbt_swag_reset(&sys->modified_constraint_set);
+}
