process.h

   1 #ifndef PROCESS_H
   2 #define PROCESS_H
   3
   4 #define USE_UNORDERED_MAP 1
   5 //#undef USE_UNORDERED_MAP
   6
   7 #include <vector>
   8 #ifdef USE_UNORDERED_MAP
   9 #  include <tr1/unordered_map>
  10 #  define MAP_TEMPLATE std::tr1::unordered_map
  11 #else
  12 #  include <map>
  13 #  define MAP_TEMPLATE std::map
  14 #endif
  15 #include <msg/msg.h>
  16 #include <xbt/log.h>
  17 #include "communicator.h"
  18 #include "neighbor.h"
  19
  20 class process {
  21 public:
  22     static double get_total_load_init()    { return total_load_init;    }
  23     static double get_total_load_running() { return total_load_running; }
  24     static double get_total_load_exit()    { return total_load_exit;    }
  25
  26     process(int argc, char* argv[]);
  27     virtual ~process();
  28
  29     double get_load() const                { return load; }
  30
  31     int run();
  32
  33 protected:
  34     typedef std::vector<neighbor> neigh_type;
  35     typedef std::vector<neighbor*> pneigh_type;
  36
  37     pneigh_type pneigh;         // list of pointers to neighbors that
  38                                 // we are free to reorder
  39
  40     // Returns the sum of "to_send" for all neighbors.
  41     double sum_of_to_send() const;
  42
  43     // Calls neighbor::print(verbose, logp, cat) for each member of neigh.
  44     void print_loads(bool verbose = false,
  45                      e_xbt_log_priority_t logp = xbt_log_priority_info,
  46                      xbt_log_category_t cat = _XBT_LOGV(default)) const;
  47
  48     // Calls neighbor::print(verbose, logp, cat) for each member of pneigh.
  49     void print_loads_p(bool verbose = false,
  50                        e_xbt_log_priority_t logp = xbt_log_priority_info,
  51                        xbt_log_category_t cat = _XBT_LOGV(default)) const;
  52
  53 private:
  54     static double total_load_init; // sum of process loads at init
  55     static double total_load_running; // summ of loads while running
  56     static double total_load_exit; // sum of process loads at exit
  57
  58     typedef MAP_TEMPLATE<m_host_t, neighbor*> rev_neigh_type;
  59     neigh_type neigh;           // list of neighbors (do not alter
  60                                 // after construction!)
  61     rev_neigh_type rev_neigh;   // map m_host_t -> neighbor
  62
  63     communicator comm;          // communicator for this process
  64     int ctrl_close_pending;     // number of "close" messages to wait
  65                                 // on ctrl channel
  66     int data_close_pending;     // number of "close" messages to wait
  67                                 // on data channel
  68     bool close_received;        // true if we received a "close" message
  69     bool may_receive;           // true if there remains neighbors to listen for
  70     bool finalizing;            // true when finalize() is running
  71
  72     unsigned lb_iter;           // counter of load-balancing iterations
  73     unsigned comp_iter;         // counter of computation iterations
  74
  75     double prev_load_broadcast; // used to ensure that we do not send
  76                                 // a same information messages
  77     double load;                // current load
  78     double expected_load;       // expected load in bookkeeping mode
  79
  80     // The load balancing algorithm comes here...
  81     // Parameter "my_load" is the load to take into account for myself
  82     // (may be load or expected load).
  83     // Returns the total load sent to neighbors.
  84     virtual double load_balance(double my_load);
  85
  86     // Virtually do some computation
  87     void compute();
  88
  89     // Send procedures, with helpers for bookkeeping mode or not
  90     void send1_no_bookkeeping(neighbor& nb);
  91     void send1_bookkeeping(neighbor& nb);
  92     void send();
  93
  94     // Receive procedure: wait (or not) for a message to come.
  95     enum recv_wait_mode { NO_WAIT = 0, WAIT, WAIT_FOR_CLOSE };
  96     void receive(recv_wait_mode wait);
  97
  98     // Finalize sends a "close" message to each neighbor and wait for
  99     // all of them to answer.
 100     void finalize1(neighbor& nb);
 101     void finalize();
 102 };
 103
 104 #endif // !PROCESS_H
 105
 106 // Local variables:
 107 // mode: c++
 108 // End: