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 #include "options.h"
  20
  21 class process {
  22 public:
  23     static double get_total_load_init()    { return total_load_init;    }
  24     static double get_total_load_running() { return total_load_running; }
  25     static double get_total_load_exit()    { return total_load_exit;    }
  26
  27     process(int argc, char* argv[]);
  28     virtual ~process();
  29
  30     double get_comp() const                { return comp; }
  31     double get_real_load() const           { return real_load; }
  32
  33     int run();
  34
  35 protected:
  36     typedef std::vector<neighbor> neigh_type;
  37     typedef std::vector<neighbor*> pneigh_type;
  38
  39     pneigh_type pneigh;         // list of pointers to neighbors that
  40                                 // we are free to reorder
  41
  42     // Get and set current load, which may be real load, or expected
  43     // load if opt::bookkeeping is true.
  44     double get_load() const;
  45     void set_load(double load);
  46
  47     // Register some amount of load to send to given neighbor.
  48     void send(neighbor& nb, double amount);
  49     void send(neighbor* nb, double amount) { send(*nb, amount); }
  50
  51     // Calls neighbor::print(verbose, logp, cat) for each member of neigh.
  52     void print_loads(bool verbose = false,
  53                      e_xbt_log_priority_t logp = xbt_log_priority_info,
  54                      xbt_log_category_t cat = _XBT_LOGV(default)) const;
  55
  56     // Calls neighbor::print(verbose, logp, cat) for each member of pneigh.
  57     void print_loads_p(bool verbose = false,
  58                        e_xbt_log_priority_t logp = xbt_log_priority_info,
  59                        xbt_log_category_t cat = _XBT_LOGV(default)) const;
  60
  61 private:
  62     static double total_load_init; // sum of process loads at init
  63     static double total_load_running; // sum of loads while running
  64     static double total_load_exit; // sum of process loads at exit
  65
  66     typedef MAP_TEMPLATE<m_host_t, neighbor*> rev_neigh_type;
  67     neigh_type neigh;           // list of neighbors (do not alter
  68                                 // after construction!)
  69     rev_neigh_type rev_neigh;   // map m_host_t -> neighbor
  70
  71     communicator comm;          // communicator for this process
  72     int ctrl_close_pending;     // number of "close" messages to wait
  73                                 // on ctrl channel
  74     int data_close_pending;     // number of "close" messages to wait
  75                                 // on data channel
  76     bool close_received;        // true if we received a "close" message
  77     bool finalizing;            // true when finalize() is running
  78
  79     unsigned lb_iter;           // counter of load-balancing iterations
  80     unsigned comp_iter;         // counter of computation iterations
  81
  82     double comp;                // total computing done so far (flops)
  83
  84     double prev_load_broadcast; // used to ensure that we do not send
  85                                 // a same information messages
  86     double real_load;           // current load
  87     double expected_load;       // expected load in bookkeeping mode
  88
  89     // The load balancing algorithm comes here...
  90     virtual void load_balance();
  91
  92     // Virtually do some computation
  93     void compute();
  94
  95     // Send procedures, with helpers for bookkeeping mode or not
  96     void send1_no_bookkeeping(neighbor& nb);
  97     void send1_bookkeeping(neighbor& nb);
  98     void send_all();
  99
 100     // Returns true if there remains neighbors to listen for
 101     bool may_receive() { return ctrl_close_pending || data_close_pending; }
 102
 103     // Receive procedure
 104     // Parameter "timeout" may be 0 for non-blocking operation, -1 for
 105     // infinite waiting, or any positive timeout.
 106     void receive(double timeout);
 107
 108     // Finalize sends a "close" message to each neighbor and wait for
 109     // all of them to answer.
 110     void finalize1(neighbor& nb);
 111     void finalize();
 112 };
 113
 114 inline
 115 double process::get_load() const
 116 {
 117     if (opt::bookkeeping)
 118         return expected_load;
 119     else
 120         return real_load;
 121 }
 122
 123 inline
 124 void process::set_load(double load)
 125 {
 126     if (opt::bookkeeping)
 127         expected_load = load;
 128     else
 129         real_load = load;
 130 }
 131
 132 #endif // !PROCESS_H
 133
 134 // Local variables:
 135 // mode: c++
 136 // End: