# define MAP_TEMPLATE std::map
#endif
#include <msg/msg.h>
+#include <xbt/log.h>
#include "communicator.h"
+#include "misc.h"
#include "neighbor.h"
+#include "options.h"
class process {
public:
+ static double get_total_load_init() { return total_load_init; }
+ static double get_total_load_running() { return total_load_running; }
+ static double get_total_load_exit() { return total_load_exit; }
+
process(int argc, char* argv[]);
- ~process();
+ virtual ~process();
+
+ double get_comp() const { return comp; }
+ double get_real_load() const { return real_load; }
+
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
+
+ // Get and set current load, which may be real load, or expected
+ // load if opt::bookkeeping is true.
+ double get_load() const;
+ void set_load(double load);
+
+ // Register some amount of load to send to given neighbor.
+ void send(neighbor& nb, double amount);
+ void send(neighbor* nb, double amount) { send(*nb, amount); }
+
+ // Calls neighbor::print(verbose, logp, cat) for each member of neigh.
+ void print_loads(bool verbose = false,
+ e_xbt_log_priority_t logp = xbt_log_priority_info,
+ xbt_log_category_t cat = _XBT_LOGV(default)) const;
+
+ // Calls neighbor::print(verbose, logp, cat) for each member of pneigh.
+ void print_loads_p(bool verbose = false,
+ e_xbt_log_priority_t logp = xbt_log_priority_info,
+ xbt_log_category_t cat = _XBT_LOGV(default)) const;
private:
+ static double total_load_init; // sum of process loads at init
+ static double total_load_running; // sum of loads while running
+ static double total_load_exit; // sum of process loads at exit
+
typedef MAP_TEMPLATE<m_host_t, neighbor*> rev_neigh_type;
- enum recv_wait_mode { NO_WAIT = 0, WAIT, WAIT_FOR_CLOSE };
+ neigh_type neigh; // list of neighbors (do not alter
+ // after construction!)
+ rev_neigh_type rev_neigh; // map m_host_t -> neighbor
- rev_neigh_type rev_neigh;
+ 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
+ bool close_received; // true if we received a "close" message
+ bool finalizing; // true when finalize() is running
- communicator comm;
- int ctrl_close_pending;
- int data_close_pending;
+ unsigned lb_iter; // counter of load-balancing iterations
+ unsigned comp_iter; // counter of computation iterations
- unsigned iter;
+ double comp; // total computing done so far (flops)
- 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 real_load; // current load
+ double expected_load; // expected load in bookkeeping mode
- double sum_of_to_send() const;
- virtual double load_balance(double my_load);
+ // The load balancing algorithm comes here...
+ virtual void load_balance();
+ // 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();
- bool receive(recv_wait_mode wait);
+ void send_all();
+
+ // Returns true if there remains neighbors to listen for
+ bool may_receive() const {
+ return ctrl_close_pending || data_close_pending;
+ }
+
+ // Receive procedure
+ // Parameter "timeout" may be 0 for non-blocking operation, -1 for
+ // infinite waiting, or any positive timeout.
+ void receive(double timeout);
+
+ // Finalize sends a "close" message to each neighbor and wait for
+ // all of them to answer.
void finalize1(neighbor& nb);
void finalize();
- void print_loads(e_xbt_log_priority_t logp = xbt_log_priority_info);
+};
+
+inline
+double process::get_load() const
+{
+ if (opt::bookkeeping)
+ return expected_load;
+ else
+ return real_load;
+}
+
+inline
+void process::set_load(double load)
+{
+ if (opt::bookkeeping)
+ expected_load = load;
+ else
+ real_load = load;
+}
+
+struct pneigh_load_less {
+ bool operator()(const neighbor* a, const neighbor* b)
+ {
+ return a->get_load() < b->get_load();
+ }
+};
+
+struct pneigh_load_greater {
+ bool operator()(const neighbor* a, const neighbor* b)
+ {
+ return a->get_load() > b->get_load();
+ }
};
#endif // !PROCESS_H
