- // 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.
- enum recv_wait_mode { NO_WAIT = 0, WAIT, WAIT_FOR_CLOSE };
- void 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();
+ mutex_t mutex; // synchronization between threads
+ condition_t cond;
+
+ struct mesg_accounting {
+ double amount; // sum of message size
+ unsigned count; // number of messages
+ mesg_accounting(): amount(0.0), count(0) { }
+ };
+ struct accounting {
+ double comp_amount; // total computing done so far (flops)
+ mesg_accounting data_send; // data messages sent
+ mesg_accounting data_recv; // data messages received
+ mesg_accounting ctrl_send; // ctrl message sent
+ mesg_accounting ctrl_recv; // ctrl message received
+ accounting(): comp_amount(0.0) { }
+ };
+ accounting acc;
+
+ void add_comp_amount(double amount) { acc.comp_amount += amount; }
+ void add_data_send_mesg(double amount) {
+ ++acc.data_send.count;
+ acc.data_send.amount += amount;
+ }
+ void add_data_recv_mesg(double amount) {
+ ++acc.data_recv.count;
+ acc.data_recv.amount += amount;
+ }
+ void add_ctrl_send_mesg(double amount) {
+ ++acc.ctrl_send.count;
+ acc.ctrl_send.amount += amount;
+ }
+ void add_ctrl_recv_mesg(double amount) {
+ ++acc.ctrl_recv.count;
+ acc.ctrl_recv.amount += amount;
+ }
+
+ // Load-balancing loop
+ msg_thread* lb_thread;
+ void load_balance_loop();
+
+ // Simulate computation loop
+ void compute_loop();
+
+ // Check if we need to stop
+ bool still_running();
+
+ // Returns the sum of "to_send" for all neighbors.
+ double get_sum_of_to_send() const;
+
+ // Send procedures
+ void ctrl_send(neighbor& nb);
+ void data_send(neighbor& nb);
+ void ctrl_close(neighbor& nb);
+ void data_close(neighbor& nb);
+
+ // Receive procedure
+ // Parameter "timeout" may be 0 for non-blocking operation, -1 for
+ // infinite waiting, or any positive timeout.
+ void ctrl_receive(double timeout);
+ void data_receive(double timeout);
+ void handle_message(message* msg, m_host_t from);
