#define SURF_MAXMIN_HPP
#include "src/internal_config.h"
+#include "src/surf/surf_interface.hpp"
#include "surf/surf.hpp"
#include "xbt/asserts.h"
+#include "xbt/mallocator.h"
#include "xbt/misc.h"
+#include "xbt/swag.h"
#include <cmath>
+#include <limits>
+#include <vector>
/** @addtogroup SURF_lmm
* @details
* constraint.
*/
-XBT_PUBLIC_DATA(double) sg_maxmin_precision;
-XBT_PUBLIC_DATA(double) sg_surf_precision;
-XBT_PUBLIC_DATA(int) sg_concurrency_limit;
-
-static inline void double_update(double* variable, double value, double precision)
-{
- // printf("Updating %g -= %g +- %g\n",*variable,value,precision);
- // xbt_assert(value==0 || value>precision);
- // Check that precision is higher than the machine-dependent size of the mantissa. If not, brutal rounding may
- // happen, and the precision mechanism is not active...
- // xbt_assert(*variable< (2<<DBL_MANT_DIG)*precision && FLT_RADIX==2);
- *variable -= value;
- if (*variable < precision)
- *variable = 0.0;
-}
-
-static inline int double_positive(double value, double precision)
-{
- return (value > precision);
-}
-
-static inline int double_equals(double value1, double value2, double precision)
-{
- return (fabs(value1 - value2) < precision);
-}
-
/** @{ @ingroup SURF_lmm */
-/**
- * @brief Create a new Linear MaxMim system
- * @param selective_update whether we should do lazy updates
- */
-XBT_PUBLIC(lmm_system_t) lmm_system_new(bool selective_update);
-
-/**
- * @brief Free an existing Linear MaxMin system
- * @param sys The lmm system to free
- */
-XBT_PUBLIC(void) lmm_system_free(lmm_system_t sys);
-
-/**
- * @brief Create a new Linear MaxMin constraint
- * @param sys The system in which we add a constraint
- * @param id Data associated to the constraint (e.g.: a network link)
- * @param bound_value The bound value of the constraint
- */
-XBT_PUBLIC(lmm_constraint_t) lmm_constraint_new(lmm_system_t sys, void* id, double bound_value);
-
-/**
- * @brief Share a constraint
- * @param cnst The constraint to share
- */
-XBT_PUBLIC(void) lmm_constraint_shared(lmm_constraint_t cnst);
-
-/**
- * @brief Check if a constraint is shared (shared by default)
- * @param cnst The constraint to share
- * @return 1 if shared, 0 otherwise
- */
-XBT_PUBLIC(int) lmm_constraint_sharing_policy(lmm_constraint_t cnst);
-
-/**
- * @brief Get the usage of the constraint after the last lmm solve
- * @param cnst A constraint
- * @return The usage of the constraint
- */
-XBT_PUBLIC(double) lmm_constraint_get_usage(lmm_constraint_t cnst);
-
-XBT_PUBLIC(int) lmm_constraint_get_variable_amount(lmm_constraint_t cnst);
-
-/**
- * @brief Sets the concurrency limit for this constraint
- * @param cnst A constraint
- * @param concurrency_limit The concurrency limit to use for this constraint
- */
-XBT_PUBLIC(void) lmm_constraint_concurrency_limit_set(lmm_constraint_t cnst, int concurrency_limit);
-
-/**
- * @brief Gets the concurrency limit for this constraint
- * @param cnst A constraint
- * @return The concurrency limit used by this constraint
- */
-XBT_PUBLIC(int) lmm_constraint_concurrency_limit_get(lmm_constraint_t cnst);
-
-/**
- * @brief Reset the concurrency maximum for a given variable (we will update the maximum to reflect constraint
- * evolution).
- * @param cnst A constraint
-*/
-XBT_PUBLIC(void) lmm_constraint_concurrency_maximum_reset(lmm_constraint_t cnst);
-
-/**
- * @brief Get the concurrency maximum for a given variable (which reflects constraint evolution).
- * @param cnst A constraint
- * @return the maximum concurrency of the constraint
- */
-XBT_PUBLIC(int) lmm_constraint_concurrency_maximum_get(lmm_constraint_t cnst);
-
-/**
- * @brief Create a new Linear MaxMin variable
- * @param sys The system in which we add a constaint
- * @param id Data associated to the variable (e.g.: a network communication)
- * @param weight_value The weight of the variable (0.0 if not used)
- * @param bound The maximum value of the variable (-1.0 if no maximum value)
- * @param number_of_constraints The maximum number of constraint to associate to the variable
- */
-XBT_PUBLIC(lmm_variable_t)
-lmm_variable_new(lmm_system_t sys, simgrid::surf::Action* id, double weight_value, double bound,
- int number_of_constraints);
-/**
- * @brief Free a variable
- * @param sys The system associated to the variable
- * @param var The variable to free
- */
-XBT_PUBLIC(void) lmm_variable_free(lmm_system_t sys, lmm_variable_t var);
-
-/**
- * @brief Get the value of the variable after the last lmm solve
- * @param var A variable
- * @return The value of the variable
- */
-XBT_PUBLIC(double) lmm_variable_getvalue(lmm_variable_t var);
-
-/**
- * @brief Get the maximum value of the variable (-1.0 if no maximum value)
- * @param var A variable
- * @return The bound of the variable
- */
-XBT_PUBLIC(double) lmm_variable_getbound(lmm_variable_t var);
-
-/**
- * @brief Set the concurrent share of the variable
- * @param var A variable
- * @param concurrency_share The new concurrency share
- */
-XBT_PUBLIC(void) lmm_variable_concurrency_share_set(lmm_variable_t var, short int concurrency_share);
-
-/**
- * @brief Associate a variable to a constraint with a coefficient
- * @param sys A system
- * @param cnst A constraint
- * @param var A variable
- * @param value The coefficient associated to the variable in the constraint
- */
-XBT_PUBLIC(void) lmm_expand(lmm_system_t sys, lmm_constraint_t cnst, lmm_variable_t var, double value);
-
-/**
- * @brief Add value to the coefficient between a constraint and a variable or create one
- * @param sys A system
- * @param cnst A constraint
- * @param var A variable
- * @param value The value to add to the coefficient associated to the variable in the constraint
- */
-XBT_PUBLIC(void) lmm_expand_add(lmm_system_t sys, lmm_constraint_t cnst, lmm_variable_t var, double value);
-
-/**
- * @brief Get the numth constraint associated to the variable
- * @param sys The system associated to the variable (not used)
- * @param var A variable
- * @param num The rank of constraint we want to get
- * @return The numth constraint
- */
-XBT_PUBLIC(lmm_constraint_t) lmm_get_cnst_from_var(lmm_system_t sys, lmm_variable_t var, unsigned num);
-
-/**
- * @brief Get the weigth of the numth constraint associated to the variable
- * @param sys The system associated to the variable (not used)
- * @param var A variable
- * @param num The rank of constraint we want to get
- * @return The numth constraint
- */
-XBT_PUBLIC(double) lmm_get_cnst_weight_from_var(lmm_system_t sys, lmm_variable_t var, unsigned num);
-
-/**
- * @brief Get the number of constraint associated to a variable
- * @param sys The system associated to the variable (not used)
- * @param var A variable
- * @return The number of constraint associated to the variable
- */
-XBT_PUBLIC(int) lmm_get_number_of_cnst_from_var(lmm_system_t sys, lmm_variable_t var);
-
-/**
- * @brief Get a var associated to a constraint
- * @details Get the first variable of the next variable of elem if elem is not NULL
- * @param sys The system associated to the variable (not used)
- * @param cnst A constraint
- * @param elem A element of constraint of the constraint or NULL
- * @return A variable associated to a constraint
- */
-XBT_PUBLIC(lmm_variable_t) lmm_get_var_from_cnst(lmm_system_t sys, lmm_constraint_t cnst, lmm_element_t* elem);
-
-/**
- * @brief Get a var associated to a constraint
- * @details Get the first variable of the next variable of elem if elem is not NULL
- * @param cnst A constraint
- * @param elem A element of constraint of the constraint or NULL
- * @param nextelem A element of constraint of the constraint or NULL, the one after elem
- * @param numelem parameter representing the number of elements to go
- *
- * @return A variable associated to a constraint
- */
-XBT_PUBLIC(lmm_variable_t)
-lmm_get_var_from_cnst_safe(lmm_system_t sys, lmm_constraint_t cnst, lmm_element_t* elem, lmm_element_t* nextelem,
- int* numelem);
-
-/**
- * @brief Get the data associated to a constraint
- * @param cnst A constraint
- * @return The data associated to the constraint
- */
-XBT_PUBLIC(void*) lmm_constraint_id(lmm_constraint_t cnst);
-
-/**
- * @brief Get the data associated to a variable
- * @param var A variable
- * @return The data associated to the variable
- */
-XBT_PUBLIC(void*) lmm_variable_id(lmm_variable_t var);
-
-/**
- * @brief Update the value of element linking the constraint and the variable
- * @param sys A system
- * @param cnst A constraint
- * @param var A variable
- * @param value The new value
- */
-XBT_PUBLIC(void) lmm_update(lmm_system_t sys, lmm_constraint_t cnst, lmm_variable_t var, double value);
-
-/**
- * @brief Update the bound of a variable
- * @param sys A system
- * @param var A constraint
- * @param bound The new bound
- */
-XBT_PUBLIC(void) lmm_update_variable_bound(lmm_system_t sys, lmm_variable_t var, double bound);
-
-/**
- * @brief Update the weight of a variable
- * @param sys A system
- * @param var A variable
- * @param weight The new weight of the variable
- */
-XBT_PUBLIC(void) lmm_update_variable_weight(lmm_system_t sys, lmm_variable_t var, double weight);
-
-/**
- * @brief Get the weight of a variable
- * @param var A variable
- * @return The weight of the variable
- */
-XBT_PUBLIC(double) lmm_get_variable_weight(lmm_variable_t var);
-
-/**
- * @brief Update a constraint bound
- * @param sys A system
- * @param cnst A constraint
- * @param bound The new bound of the consrtaint
- */
-XBT_PUBLIC(void) lmm_update_constraint_bound(lmm_system_t sys, lmm_constraint_t cnst, double bound);
-
-/**
- * @brief [brief description]
- * @param sys A system
- * @param cnst A constraint
- * @return [description]
- */
-XBT_PUBLIC(int) lmm_constraint_used(lmm_system_t sys, lmm_constraint_t cnst);
-
-/**
- * @brief Print the lmm system
- * @param sys The lmm system to print
- */
-XBT_PUBLIC(void) lmm_print(lmm_system_t sys);
/**
* @brief Solve the lmm system
XBT_PUBLIC(double) func_vegas_fp(lmm_variable_t var, double x);
XBT_PUBLIC(double) func_vegas_fpi(lmm_variable_t var, double x);
+/**
+ * @brief LMM element
+ * Elements can be seen as glue between constraint objects and variable objects.
+ * Basically, each variable will have a set of elements, one for each constraint where it is involved.
+ * Then, it is used to list all variables involved in constraint through constraint's xxx_element_set lists, or
+ * vice-versa list all constraints for a given variable.
+ */
+XBT_PUBLIC_CLASS s_lmm_element_t {
+public:
+ int get_concurrency() const;
+ void decrease_concurrency();
+ void increase_concurrency();
+
+ void make_active();
+ void make_inactive();
+
+ /* hookup to constraint */
+ s_xbt_swag_hookup_t enabled_element_set_hookup;
+ s_xbt_swag_hookup_t disabled_element_set_hookup;
+ s_xbt_swag_hookup_t active_element_set_hookup;
+
+ lmm_constraint_t constraint;
+ lmm_variable_t variable;
+
+ // consumption_weight: impact of 1 byte or flop of your application onto the resource (in byte or flop)
+ // - if CPU, then probably 1.
+ // - If network, then 1 in forward direction and 0.05 backward for the ACKs
+ double consumption_weight;
+};
+
+struct s_lmm_constraint_light_t {
+ double remaining_over_usage;
+ lmm_constraint_t cnst;
+};
+
+/**
+ * @brief LMM constraint
+ * Each constraint contains several partially overlapping logical sets of elements:
+ * \li Disabled elements which variable's weight is zero. This variables are not at all processed by LMM, but eventually
+ * the corresponding action will enable it (at least this is the idea).
+ * \li Enabled elements which variable's weight is non-zero. They are utilized in some LMM functions.
+ * \li Active elements which variable's weight is non-zero (i.e. it is enabled) AND its element value is non-zero.
+ * LMM_solve iterates over active elements during resolution, dynamically making them active or unactive.
+ */
+XBT_PUBLIC_CLASS s_lmm_constraint_t {
+public:
+ s_lmm_constraint_t() = default;
+ s_lmm_constraint_t(void* id_value, double bound_value);
+
+ /** @brief Unshare a constraint. */
+ void unshare() { sharing_policy = 0; }
+
+ /**
+ * @brief Check if a constraint is shared (shared by default)
+ * @return 1 if shared, 0 otherwise
+ */
+ int get_sharing_policy() const { return sharing_policy; }
+
+ /**
+ * @brief Get the usage of the constraint after the last lmm solve
+ * @return The usage of the constraint
+ */
+ double get_usage() const;
+ int get_variable_amount() const;
+
+ /**
+ * @brief Sets the concurrency limit for this constraint
+ * @param concurrency_limit The concurrency limit to use for this constraint
+ */
+ void set_concurrency_limit(int limit)
+ {
+ xbt_assert(limit < 0 || concurrency_maximum <= limit,
+ "New concurrency limit should be larger than observed concurrency maximum. Maybe you want to call"
+ " concurrency_maximum_reset() to reset the maximum?");
+ concurrency_limit = limit;
+ }
+
+ /**
+ * @brief Gets the concurrency limit for this constraint
+ * @return The concurrency limit used by this constraint
+ */
+ int get_concurrency_limit() const { return concurrency_limit; }
+
+ /**
+ * @brief Reset the concurrency maximum for a given variable (we will update the maximum to reflect constraint
+ * evolution).
+ */
+ void reset_concurrency_maximum() { concurrency_maximum = 0; }
+
+ /**
+ * @brief Get the concurrency maximum for a given variable (which reflects constraint evolution).
+ * @return the maximum concurrency of the constraint
+ */
+ int get_concurrency_maximum() const
+ {
+ xbt_assert(concurrency_limit < 0 || concurrency_maximum <= concurrency_limit,
+ "Very bad: maximum observed concurrency is higher than limit. This is a bug of SURF, please report it.");
+ return concurrency_maximum;
+ }
+
+ int get_concurrency_slack() const
+ {
+ return concurrency_limit < 0 ? std::numeric_limits<int>::max() : concurrency_limit - concurrency_current;
+ }
+
+ /**
+ * @brief Get a var associated to a constraint
+ * @details Get the first variable of the next variable of elem if elem is not NULL
+ * @param elem A element of constraint of the constraint or NULL
+ * @return A variable associated to a constraint
+ */
+ lmm_variable_t get_variable(lmm_element_t* elem) const;
+
+ /**
+ * @brief Get a var associated to a constraint
+ * @details Get the first variable of the next variable of elem if elem is not NULL
+ * @param elem A element of constraint of the constraint or NULL
+ * @param nextelem A element of constraint of the constraint or NULL, the one after elem
+ * @param numelem parameter representing the number of elements to go
+ * @return A variable associated to a constraint
+ */
+ lmm_variable_t get_variable_safe(lmm_element_t* elem, lmm_element_t* nextelem, int* numelem) const;
+
+ /**
+ * @brief Get the data associated to a constraint
+ * @return The data associated to the constraint
+ */
+ void* get_id() const { return id; }
+
+ /* hookup to system */
+ s_xbt_swag_hookup_t constraint_set_hookup = {nullptr, nullptr};
+ s_xbt_swag_hookup_t active_constraint_set_hookup = {nullptr, nullptr};
+ s_xbt_swag_hookup_t modified_constraint_set_hookup = {nullptr, nullptr};
+ s_xbt_swag_hookup_t saturated_constraint_set_hookup = {nullptr, nullptr};
+ s_xbt_swag_t enabled_element_set; /* a list of lmm_element_t */
+ s_xbt_swag_t disabled_element_set; /* a list of lmm_element_t */
+ s_xbt_swag_t active_element_set; /* a list of lmm_element_t */
+ double remaining;
+ double usage;
+ double bound;
+ // TODO MARTIN Check maximum value across resources at the end of simulation and give a warning is more than e.g. 500
+ int concurrency_current; /* The current concurrency */
+ int concurrency_maximum; /* The maximum number of (enabled and disabled) variables associated to the constraint at any
+ * given time (essentially for tracing)*/
+
+ int sharing_policy; /* see @e_surf_link_sharing_policy_t (0: FATPIPE, 1: SHARED, 2: FULLDUPLEX) */
+ int id_int;
+ double lambda;
+ double new_lambda;
+ lmm_constraint_light_t cnst_light;
+
+private:
+ static int Global_debug_id;
+ int concurrency_limit; /* The maximum number of variables that may be enabled at any time (stage variables if
+ * necessary) */
+ void* id;
+};
+
+/**
+ * @brief LMM variable
+ *
+ * When something prevents us from enabling a variable, we "stage" the weight that we would have like to set, so that as
+ * soon as possible we enable the variable with desired weight
+ */
+XBT_PUBLIC_CLASS s_lmm_variable_t {
+public:
+ void initialize(simgrid::surf::Action* id_value, double sharing_weight_value, double bound_value,
+ int number_of_constraints, unsigned visited_value);
+
+ /**
+ * @brief Get the value of the variable after the last lmm solve
+ * @return The value of the variable
+ */
+ double get_value() const { return value; }
+
+ /**
+ * @brief Get the maximum value of the variable (-1.0 if no maximum value)
+ * @return The bound of the variable
+ */
+ double get_bound() const { return bound; }
+
+ /**
+ * @brief Set the concurrent share of the variable
+ * @param concurrency_share The new concurrency share
+ */
+ void set_concurrency_share(short int value) { concurrency_share = value; }
+
+ /**
+ * @brief Get the numth constraint associated to the variable
+ * @param num The rank of constraint we want to get
+ * @return The numth constraint
+ */
+ lmm_constraint_t get_constraint(unsigned num) const { return num < cnsts.size() ? cnsts[num].constraint : nullptr; }
+
+ /**
+ * @brief Get the weigth of the numth constraint associated to the variable
+ * @param num The rank of constraint we want to get
+ * @return The numth constraint
+ */
+ double get_constraint_weight(unsigned num) const { return num < cnsts.size() ? cnsts[num].consumption_weight : 0.0; }
+
+ /**
+ * @brief Get the number of constraint associated to a variable
+ * @return The number of constraint associated to the variable
+ */
+ int get_number_of_constraint() const { return cnsts.size(); }
+
+ /**
+ * @brief Get the data associated to a variable
+ * @return The data associated to the variable
+ */
+ simgrid::surf::Action* get_id() const { return id; }
+
+ /**
+ * @brief Get the weight of a variable
+ * @return The weight of the variable
+ */
+ double get_weight() const { return sharing_weight; }
+
+ /** @brief Measure the minimum concurrency slack across all constraints where the given var is involved */
+ int get_min_concurrency_slack() const;
+
+ /** @brief Check if a variable can be enabled
+ * Make sure to set staged_weight before, if your intent is only to check concurrency
+ */
+ int can_enable() const { return staged_weight > 0 && get_min_concurrency_slack() >= concurrency_share; }
+
+ /* hookup to system */
+ s_xbt_swag_hookup_t variable_set_hookup = {nullptr, nullptr};
+ s_xbt_swag_hookup_t saturated_variable_set_hookup = {nullptr, nullptr};
+
+ std::vector<s_lmm_element_t> cnsts;
+
+ // sharing_weight: variable's impact on the resource during the sharing
+ // if == 0, the variable is not considered by LMM
+ // on CPU, actions with N threads have a sharing of N
+ // on network, the actions with higher latency have a lesser sharing_weight
+ double sharing_weight;
+
+ double staged_weight; /* If non-zero, variable is staged for addition as soon as maxconcurrency constraints will be
+ * met */
+ double bound;
+ double value;
+ short int concurrency_share; /* The maximum number of elements that variable will add to a constraint */
+ simgrid::surf::Action* id;
+ int id_int;
+ unsigned visited; /* used by lmm_update_modified_set */
+ /* \begin{For Lagrange only} */
+ double mu;
+ double new_mu;
+ double (*func_f)(s_lmm_variable_t* var, double x); /* (f) */
+ double (*func_fp)(s_lmm_variable_t* var, double x); /* (f') */
+ double (*func_fpi)(s_lmm_variable_t* var, double x); /* (f')^{-1} */
+ /* \end{For Lagrange only} */
+
+private:
+ static int Global_debug_id;
+};
+
+inline void s_lmm_element_t::make_active()
+{
+ xbt_swag_insert_at_head(this, &constraint->active_element_set);
+}
+inline void s_lmm_element_t::make_inactive()
+{
+ xbt_swag_remove(this, &constraint->active_element_set);
+}
+
+/**
+ * @brief LMM system
+ */
+XBT_PUBLIC_CLASS s_lmm_system_t {
+public:
+ /**
+ * @brief Create a new Linear MaxMim system
+ * @param selective_update whether we should do lazy updates
+ */
+ explicit s_lmm_system_t(bool selective_update);
+ /** @brief Free an existing Linear MaxMin system */
+ ~s_lmm_system_t();
+
+ /**
+ * @brief Create a new Linear MaxMin constraint
+ * @param id Data associated to the constraint (e.g.: a network link)
+ * @param bound_value The bound value of the constraint
+ */
+ lmm_constraint_t constraint_new(void* id, double bound_value);
+
+ /**
+ * @brief Create a new Linear MaxMin variable
+ * @param id Data associated to the variable (e.g.: a network communication)
+ * @param weight_value The weight of the variable (0.0 if not used)
+ * @param bound The maximum value of the variable (-1.0 if no maximum value)
+ * @param number_of_constraints The maximum number of constraint to associate to the variable
+ */
+ lmm_variable_t variable_new(simgrid::surf::Action* id, double weight_value, double bound, int number_of_constraints);
+
+ /**
+ * @brief Free a variable
+ * @param var The variable to free
+ */
+ void variable_free(lmm_variable_t var);
+
+ /**
+ * @brief Associate a variable to a constraint with a coefficient
+ * @param cnst A constraint
+ * @param var A variable
+ * @param value The coefficient associated to the variable in the constraint
+ */
+ void expand(lmm_constraint_t cnst, lmm_variable_t var, double value);
+
+ /**
+ * @brief Add value to the coefficient between a constraint and a variable or create one
+ * @param cnst A constraint
+ * @param var A variable
+ * @param value The value to add to the coefficient associated to the variable in the constraint
+ */
+ void expand_add(lmm_constraint_t cnst, lmm_variable_t var, double value);
+
+ /**
+ * @brief Update the bound of a variable
+ * @param var A constraint
+ * @param bound The new bound
+ */
+ void update_variable_bound(lmm_variable_t var, double bound);
+
+ /**
+ * @brief Update the weight of a variable
+ * @param var A variable
+ * @param weight The new weight of the variable
+ */
+ void update_variable_weight(lmm_variable_t var, double weight);
+
+ /**
+ * @brief Update a constraint bound
+ * @param cnst A constraint
+ * @param bound The new bound of the consrtaint
+ */
+ void update_constraint_bound(lmm_constraint_t cnst, double bound);
+
+ /**
+ * @brief [brief description]
+ * @param cnst A constraint
+ * @return [description]
+ */
+ int constraint_used(lmm_constraint_t cnst) { return xbt_swag_belongs(cnst, &active_constraint_set); }
+
+ /** @brief Print the lmm system */
+ void print();
+
+ /** @brief Solve the lmm system */
+ void solve();
+
+private:
+ static void* variable_mallocator_new_f();
+ static void variable_mallocator_free_f(void* var);
+
+ void var_free(lmm_variable_t var);
+ void cnst_free(lmm_constraint_t cnst);
+ lmm_variable_t extract_variable() { return static_cast<lmm_variable_t>(xbt_swag_extract(&variable_set)); }
+ lmm_constraint_t extract_constraint() { return static_cast<lmm_constraint_t>(xbt_swag_extract(&constraint_set)); }
+ void insert_constraint(lmm_constraint_t cnst) { xbt_swag_insert(cnst, &constraint_set); }
+ void remove_variable(lmm_variable_t var)
+ {
+ xbt_swag_remove(var, &variable_set);
+ xbt_swag_remove(var, &saturated_variable_set);
+ }
+ void make_constraint_active(lmm_constraint_t cnst) { xbt_swag_insert(cnst, &active_constraint_set); }
+ void make_constraint_inactive(lmm_constraint_t cnst)
+ {
+ xbt_swag_remove(cnst, &active_constraint_set);
+ xbt_swag_remove(cnst, &modified_constraint_set);
+ }
+
+ void enable_var(lmm_variable_t var);
+ void disable_var(lmm_variable_t var);
+ void on_disabled_var(lmm_constraint_t cnstr);
+
+ /**
+ * @brief Update the value of element linking the constraint and the variable
+ * @param cnst A constraint
+ * @param var A variable
+ * @param value The new value
+ */
+ void update(lmm_constraint_t cnst, lmm_variable_t var, double value);
+
+ void update_modified_set(lmm_constraint_t cnst);
+ void update_modified_set_rec(lmm_constraint_t cnst);
+
+ /** @brief Remove all constraints of the modified_constraint_set. */
+ void remove_all_modified_set();
+ void check_concurrency();
+
+public:
+ bool modified;
+ s_xbt_swag_t variable_set; /* a list of lmm_variable_t */
+ s_xbt_swag_t active_constraint_set; /* a list of lmm_constraint_t */
+ s_xbt_swag_t saturated_variable_set; /* a list of lmm_variable_t */
+ s_xbt_swag_t saturated_constraint_set; /* a list of lmm_constraint_t */
+
+ simgrid::surf::ActionLmmListPtr keep_track;
+
+ void (*solve_fun)(lmm_system_t self);
+
+private:
+ bool selective_update_active; /* flag to update partially the system only selecting changed portions */
+ unsigned visited_counter; /* used by lmm_update_modified_set and lmm_remove_modified_set to cleverly (un-)flag the
+ * constraints (more details in these functions) */
+ s_xbt_swag_t constraint_set; /* a list of lmm_constraint_t */
+ s_xbt_swag_t modified_constraint_set; /* a list of modified lmm_constraint_t */
+ xbt_mallocator_t variable_mallocator;
+};
+
+extern XBT_PRIVATE double (*func_f_def)(lmm_variable_t, double);
+extern XBT_PRIVATE double (*func_fp_def)(lmm_variable_t, double);
+extern XBT_PRIVATE double (*func_fpi_def)(lmm_variable_t, double);
+
/** @} */
#endif
