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 <algorithm>
   8 #include <tr1/functional>
   9 #ifdef USE_UNORDERED_MAP
  10 #  include <tr1/unordered_map>
  11 #  define MAP_TEMPLATE std::tr1::unordered_map
  12 #else
  13 #  include <map>
  14 #  define MAP_TEMPLATE std::map
  15 #endif
  16 #include <vector>
  17 #include <msg/msg.h>
  18 #include <xbt/log.h>
  19 #include "communicator.h"
  20 #include "misc.h"
  21 #include "neighbor.h"
  22 #include "options.h"
  23
  24 class process {
  25 public:
  26     static double get_total_load_init()    { return total_load_init;    }
  27     static double get_total_load_running() { return total_load_running; }
  28     static double get_total_load_exit()    { return total_load_exit;    }
  29
  30     process(int argc, char* argv[]);
  31     virtual ~process();
  32
  33     double get_comp() const                { return comp; }
  34     double get_real_load() const           { return real_load; }
  35
  36     int run();
  37
  38 protected:
  39     typedef std::vector<neighbor> neigh_type;
  40     typedef std::vector<neighbor*> pneigh_type;
  41
  42     pneigh_type pneigh;         // list of pointers to neighbors that
  43                                 // we are free to reorder
  44
  45     template <typename Compare>
  46     void pneigh_sort_by_load(const Compare& comp);
  47
  48     // Get and set current load, which may be real load, or expected
  49     // load if opt::bookkeeping is true.
  50     double get_load() const;
  51     void set_load(double load);
  52
  53     // Register some amount of load to send to given neighbor.
  54     void send(neighbor& nb, double amount);
  55     void send(neighbor* nb, double amount) { send(*nb, amount); }
  56
  57     // Calls neighbor::print(verbose, logp, cat) for each member of neigh.
  58     void print_loads(bool verbose = false,
  59                      e_xbt_log_priority_t logp = xbt_log_priority_info,
  60                      xbt_log_category_t cat = _XBT_LOGV(default)) const;
  61
  62     // Calls neighbor::print(verbose, logp, cat) for each member of pneigh.
  63     void print_loads_p(bool verbose = false,
  64                        e_xbt_log_priority_t logp = xbt_log_priority_info,
  65                        xbt_log_category_t cat = _XBT_LOGV(default)) const;
  66
  67 private:
  68     static double total_load_init; // sum of process loads at init
  69     static double total_load_running; // sum of loads while running
  70     static double total_load_exit; // sum of process loads at exit
  71
  72     typedef MAP_TEMPLATE<m_host_t, neighbor*> rev_neigh_type;
  73     neigh_type neigh;           // list of neighbors (do not alter
  74                                 // after construction!)
  75     rev_neigh_type rev_neigh;   // map m_host_t -> neighbor
  76
  77     communicator comm;          // communicator for this process
  78     int ctrl_close_pending;     // number of "close" messages to wait
  79                                 // on ctrl channel
  80     int data_close_pending;     // number of "close" messages to wait
  81                                 // on data channel
  82     bool close_received;        // true if we received a "close" message
  83     bool finalizing;            // true when finalize() is running
  84
  85     unsigned lb_iter;           // counter of load-balancing iterations
  86     unsigned comp_iter;         // counter of computation iterations
  87
  88     double comp;                // total computing done so far (flops)
  89
  90     double prev_load_broadcast; // used to ensure that we do not send
  91                                 // a same information messages
  92     double real_load;           // current load
  93     double expected_load;       // expected load in bookkeeping mode
  94
  95     // The load balancing algorithm comes here...
  96     virtual void load_balance();
  97
  98     // Virtually do some computation
  99     void compute();
 100
 101     // Send procedures, with helpers for bookkeeping mode or not
 102     void send1_no_bookkeeping(neighbor& nb);
 103     void send1_bookkeeping(neighbor& nb);
 104     void send_all();
 105
 106     // Returns true if there remains neighbors to listen for
 107     bool may_receive() const {
 108         return ctrl_close_pending || data_close_pending;
 109     }
 110
 111     // Receive procedure
 112     // Parameter "timeout" may be 0 for non-blocking operation, -1 for
 113     // infinite waiting, or any positive timeout.
 114     void receive(double timeout);
 115
 116     // Finalize sends a "close" message to each neighbor and wait for
 117     // all of them to answer.
 118     void finalize1(neighbor& nb);
 119     void finalize();
 120 };
 121
 122 inline
 123 double process::get_load() const
 124 {
 125     if (opt::bookkeeping)
 126         return expected_load;
 127     else
 128         return real_load;
 129 }
 130
 131 inline
 132 void process::set_load(double load)
 133 {
 134     if (opt::bookkeeping)
 135         expected_load = load;
 136     else
 137         real_load = load;
 138 }
 139
 140 template <typename Compare>
 141 void process::pneigh_sort_by_load(const Compare& comp)
 142 {
 143     using std::tr1::bind;
 144     using std::tr1::placeholders::_1;
 145     using std::tr1::placeholders::_2;
 146     std::sort(pneigh.begin(), pneigh.end(),
 147               bind(comp,
 148                    bind(&neighbor::get_load, _1),
 149                    bind(&neighbor::get_load, _2)));
 150 }
 151
 152 #endif // !PROCESS_H
 153
 154 // Local variables:
 155 // mode: c++
 156 // End: