-/* Copyright (c) 2004-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2004-2018. 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. */
int Variable::Global_debug_id = 1;
int Constraint::Global_debug_id = 1;
+System* make_new_maxmin_system(bool selective_update)
+{
+ return new System(selective_update);
+}
+
int Element::get_concurrency() const
{
// Ignore element with weight less than one (e.g. cross-traffic)
}
}
-void System::var_free(lmm_variable_t var)
+void System::var_free(Variable* var)
{
XBT_IN("(sys=%p, var=%p)", this, var);
- modified = true;
+ modified_ = true;
// TODOLATER Can do better than that by leaving only the variable in only one enabled_element_set, call
// update_modified_set, and then remove it..
check_concurrency();
- xbt_mallocator_release(variable_mallocator, var);
+ xbt_mallocator_release(variable_mallocator_, var);
XBT_OUT();
}
System::System(bool selective_update) : selective_update_active(selective_update)
{
- modified = false;
- visited_counter = 1;
-
XBT_DEBUG("Setting selective_update_active flag to %d", selective_update_active);
- keep_track = nullptr;
- variable_mallocator =
- xbt_mallocator_new(65536, System::variable_mallocator_new_f, System::variable_mallocator_free_f, nullptr);
- solve_fun = &lmm_solve;
+ if (selective_update)
+ modified_set_ = new kernel::resource::Action::ModifiedSet();
}
System::~System()
{
- lmm_variable_t var;
- lmm_constraint_t cnst;
+ Variable* var;
+ Constraint* cnst;
while ((var = extract_variable())) {
auto demangled = simgrid::xbt::demangle(typeid(*var->id).name());
while ((cnst = extract_constraint()))
cnst_free(cnst);
- xbt_mallocator_free(variable_mallocator);
+ xbt_mallocator_free(variable_mallocator_);
+ delete modified_set_;
}
-void System::cnst_free(lmm_constraint_t cnst)
+void System::cnst_free(Constraint* cnst)
{
make_constraint_inactive(cnst);
delete cnst;
cnst_light = nullptr;
}
-lmm_constraint_t System::constraint_new(void* id, double bound_value)
+Constraint* System::constraint_new(void* id, double bound_value)
{
- lmm_constraint_t cnst = new Constraint(id, bound_value);
+ Constraint* cnst = new Constraint(id, bound_value);
insert_constraint(cnst);
return cnst;
}
void System::variable_mallocator_free_f(void* var)
{
- delete static_cast<lmm_variable_t>(var);
+ delete static_cast<Variable*>(var);
}
-lmm_variable_t System::variable_new(simgrid::surf::Action* id, double sharing_weight, double bound,
- int number_of_constraints)
+Variable* System::variable_new(simgrid::kernel::resource::Action* id, double sharing_weight, double bound,
+ int number_of_constraints)
{
XBT_IN("(sys=%p, id=%p, weight=%f, bound=%f, num_cons =%d)", this, id, sharing_weight, bound, number_of_constraints);
- lmm_variable_t var = static_cast<lmm_variable_t>(xbt_mallocator_get(variable_mallocator));
- var->initialize(id, sharing_weight, bound, number_of_constraints, visited_counter - 1);
+ Variable* var = static_cast<Variable*>(xbt_mallocator_get(variable_mallocator_));
+ var->initialize(id, sharing_weight, bound, number_of_constraints, visited_counter_ - 1);
if (sharing_weight)
variable_set.push_front(*var);
else
return var;
}
-void System::variable_free(lmm_variable_t var)
+void System::variable_free(Variable* var)
{
remove_variable(var);
var_free(var);
}
-void System::expand(lmm_constraint_t cnst, lmm_variable_t var, double consumption_weight)
+void System::expand(Constraint* cnst, Variable* var, double consumption_weight)
{
- modified = true;
+ modified_ = true;
// Check if this variable already has an active element in this constraint
// If it does, substract it from the required slack
check_concurrency();
}
-void System::expand_add(lmm_constraint_t cnst, lmm_variable_t var, double value)
+void System::expand_add(Constraint* cnst, Variable* var, double value)
{
- modified = true;
+ modified_ = true;
check_concurrency();
check_concurrency();
}
-lmm_variable_t Constraint::get_variable(const_lmm_element_t* elem) const
+Variable* Constraint::get_variable(const_lmm_element_t* elem) const
{
if (*elem == nullptr) {
// That is the first call, pick the first element among enabled_element_set (or disabled_element_set if
// if we modify the list between calls, normal version may loop forever
// this safe version ensures that we browse the list elements only once
-lmm_variable_t Constraint::get_variable_safe(const_lmm_element_t* elem, const_lmm_element_t* nextelem,
- int* numelem) const
+Variable* Constraint::get_variable_safe(const_lmm_element_t* elem, const_lmm_element_t* nextelem, int* numelem) const
{
if (*elem == nullptr) {
*numelem = enabled_element_set.size() + disabled_element_set.size() - 1;
}
static inline void saturated_variable_set_update(ConstraintLight* cnst_light_tab,
- const dyn_light_t& saturated_constraints, lmm_system_t sys)
+ const dyn_light_t& saturated_constraints, System* sys)
{
/* Add active variables (i.e. variables that need to be set) from the set of constraints to saturate
* (cnst_light_tab)*/
}
}
-void System::solve()
+void System::lmm_solve()
{
- if (modified) {
+ if (modified_) {
XBT_IN("(sys=%p)", this);
/* Compute Usage and store the variables that reach the maximum. If selective_update_active is true, only
* constraints that changed are considered. Otherwise all constraints with active actions are considered.
*/
if (selective_update_active)
- solve(modified_constraint_set);
+ lmm_solve(modified_constraint_set);
else
- solve(active_constraint_set);
+ lmm_solve(active_constraint_set);
XBT_OUT();
}
}
-template <class CnstList> void System::solve(CnstList& cnst_list)
+template <class CnstList> void System::lmm_solve(CnstList& cnst_list)
{
double min_usage = -1;
double min_bound = -1;
cnst.usage = elem.consumption_weight / elem.variable->sharing_weight;
elem.make_active();
- simgrid::surf::Action* action = static_cast<simgrid::surf::Action*>(elem.variable->id);
- if (keep_track && not action->is_linked())
- keep_track->push_back(*action);
+ simgrid::kernel::resource::Action* action = static_cast<simgrid::kernel::resource::Action*>(elem.variable->id);
+ if (modified_set_ && not action->is_within_modified_set())
+ modified_set_->push_back(*action);
}
}
XBT_DEBUG("Constraint '%d' usage: %f remaining: %f concurrency: %i<=%i<=%i", cnst.id_int, cnst.usage,
/* Update the usage of contraints where this variable is involved */
for (Element& elem : var.cnsts) {
- lmm_constraint_t cnst = elem.constraint;
+ Constraint* cnst = elem.constraint;
if (cnst->sharing_policy) {
// Remember: shared constraints require that sum(elem.value * var.value) < cnst->bound
double_update(&(cnst->remaining), elem.consumption_weight * var.value, cnst->bound * sg_maxmin_precision);
} while (cnst_light_num > 0);
- modified = false;
+ modified_ = false;
if (selective_update_active)
remove_all_modified_set();
delete[] cnst_light_tab;
}
-void lmm_solve(lmm_system_t sys)
-{
- sys->solve();
-}
-
/** \brief Attribute the value bound to var->bound.
*
- * \param var the lmm_variable_t
+ * \param var the Variable*
* \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 System::update_variable_bound(lmm_variable_t var, double bound)
+void System::update_variable_bound(Variable* var, double bound)
{
- modified = true;
+ modified_ = true;
var->bound = bound;
if (not var->cnsts.empty())
update_modified_set(var->cnsts[0].constraint);
}
-void Variable::initialize(simgrid::surf::Action* id_value, double sharing_weight_value, double bound_value,
+void Variable::initialize(simgrid::kernel::resource::Action* id_value, double sharing_weight_value, double bound_value,
int number_of_constraints, unsigned visited_value)
{
id = id_value;
visited = visited_value;
mu = 0.0;
new_mu = 0.0;
- func_f = func_f_def;
- func_fp = func_fp_def;
- func_fpi = func_fpi_def;
xbt_assert(not variable_set_hook.is_linked());
xbt_assert(not saturated_variable_set_hook.is_linked());
// with var when running System::update_modified_set().
// A priori not a big performance issue, but we might do better by calling System::update_modified_set() within the for
// loops (after doing the first for enabling==1, and before doing the last for disabling==1)
-void System::enable_var(lmm_variable_t var)
+void System::enable_var(Variable* var)
{
xbt_assert(not XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug) || var->can_enable());
// Anyway, caller functions all call check_concurrency() in the end.
}
-void System::disable_var(lmm_variable_t var)
+void System::disable_var(Variable* var)
{
xbt_assert(not var->staged_weight, "Staged weight should have been cleared");
// Disabling the variable, move to var to list tail. Subtlety is: here, we need to call update_modified_set
* If yes, check that none of the constraints that this variable is involved in is at the limit of its concurrency
* And then add it to enabled variables
*/
-void System::on_disabled_var(lmm_constraint_t cnstr)
+void System::on_disabled_var(Constraint* cnstr)
{
if (cnstr->get_concurrency_limit() < 0)
return;
if (not numelem)
return;
- lmm_element_t elem = &cnstr->disabled_element_set.front();
+ Element* elem = &cnstr->disabled_element_set.front();
// Cannot use foreach loop, because System::enable_var() will modify disabled_element_set.. within the loop
while (numelem-- && elem) {
- lmm_element_t nextelem;
+ Element* nextelem;
if (elem->disabled_element_set_hook.is_linked()) {
auto iter = std::next(cnstr->disabled_element_set.iterator_to(*elem));
nextelem = iter != std::end(cnstr->disabled_element_set) ? &*iter : nullptr;
/* \brief update the weight of a variable, and enable/disable it.
* @return Returns whether a change was made
*/
-void System::update_variable_weight(lmm_variable_t var, double weight)
+void System::update_variable_weight(Variable* var, double weight)
{
xbt_assert(weight >= 0, "Variable weight should not be negative!");
XBT_IN("(sys=%p, var=%p, weight=%f)", this, var, weight);
- modified = true;
+ modified_ = true;
// Are we enabling this variable?
if (enabling_var) {
XBT_OUT();
}
-void System::update_constraint_bound(lmm_constraint_t cnst, double bound)
+void System::update_constraint_bound(Constraint* cnst, double bound)
{
- modified = true;
+ modified_ = true;
update_modified_set(cnst);
cnst->bound = bound;
}
/** \brief Update the constraint set propagating recursively to other constraints so the system should not be entirely
* computed.
*
- * \param cnst the lmm_constraint_t affected by the change
+ * \param cnst the Constraint* 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.
*/
-void System::update_modified_set_rec(lmm_constraint_t cnst)
+void System::update_modified_set_rec(Constraint* cnst)
{
for (Element const& elem : cnst->enabled_element_set) {
- lmm_variable_t var = elem.variable;
+ Variable* var = elem.variable;
for (Element const& elem2 : var->cnsts) {
- if (var->visited == visited_counter)
+ if (var->visited == visited_counter_)
break;
if (elem2.constraint != cnst && not elem2.constraint->modified_constraint_set_hook.is_linked()) {
modified_constraint_set.push_back(*elem2.constraint);
}
}
// var will be ignored in later visits as long as sys->visited_counter does not move
- var->visited = visited_counter;
+ var->visited = visited_counter_;
}
}
-void System::update_modified_set(lmm_constraint_t cnst)
+void System::update_modified_set(Constraint* cnst)
{
/* nothing to do if selective update isn't active */
if (selective_update_active && not cnst->modified_constraint_set_hook.is_linked()) {
// To be clean, when visited counter has wrapped around, we force these var->visited values so that variables that
// were in the modified a long long time ago are not wrongly skipped here, which would lead to very nasty bugs
// (i.e. not readibily reproducible, and requiring a lot of run time before happening).
- if (++visited_counter == 1) {
+ if (++visited_counter_ == 1) {
/* the counter wrapped around, reset each variable->visited */
for (Variable& var : variable_set)
var.visited = 0;
