class process {
public:
+ static double get_total_load_init() { return total_load_init; }
+ static double get_total_load_exit() { return total_load_exit; }
+
process(int argc, char* argv[]);
- ~process();
+ virtual ~process();
+
int run();
protected:
typedef std::vector<neighbor> neigh_type;
typedef std::vector<neighbor*> pneigh_type;
- neigh_type neigh;
- pneigh_type pneigh;
+ pneigh_type pneigh; // list of pointers to neighbors that
+ // we are free to reorder
+
+ // Returns the sum of "to_send" for all neighbors.
+ double sum_of_to_send() const;
private:
- typedef MAP_TEMPLATE<m_host_t, neighbor*> rev_neigh_type;
- enum recv_wait_mode { NO_WAIT = 0, WAIT, WAIT_FOR_CLOSE };
+ static double total_load_init;
+ static double total_load_exit;
- rev_neigh_type rev_neigh;
+ typedef MAP_TEMPLATE<m_host_t, neighbor*> rev_neigh_type;
+ neigh_type neigh; // list of neighbors (do not alter
+ // after construction!)
+ rev_neigh_type rev_neigh; // map m_host_t -> neighbor
- communicator comm;
- int ctrl_close_pending;
- int data_close_pending;
+ communicator comm; // communicator for this process
+ int ctrl_close_pending; // number of "close" messages to wait
+ // on ctrl channel
+ int data_close_pending; // number of "close" messages to wait
+ // on data channel
- unsigned iter;
+ unsigned iter; // counter of iterations
- double prev_load_broadcast;
- double load;
- double expected_load;
+ double prev_load_broadcast; // used to ensure that we do not send
+ // a same information messages
+ double load; // current load
+ double expected_load; // expected load in bookkeeping mode
- double sum_of_to_send() const;
+ // The load balancing algorithm comes here...
+ // Parameter "my_load" is the load to take into account for myself
+ // (may be load or expected load).
+ // Returns the total load sent to neighbors.
virtual double load_balance(double my_load);
+ // Virtually do some computation
void compute();
+
+ // Send procedures, with helpers for bookkeeping mode or not
void send1_no_bookkeeping(neighbor& nb);
void send1_bookkeeping(neighbor& nb);
void send();
+
+ // Receive procedure: wait (or not) for a message to come.
+ // Returns false if some "close" message was received, returns true
+ // otherwise.
+ enum recv_wait_mode { NO_WAIT = 0, WAIT, WAIT_FOR_CLOSE };
bool receive(recv_wait_mode wait);
+
+ // Finalize sends a "close" message to each neighbor and wait for
+ // all of them to answer.
void finalize1(neighbor& nb);
void finalize();
+
+ // Print with given priority what we know about our neighbors' loads
void print_loads(e_xbt_log_priority_t logp = xbt_log_priority_info);
};
