communicator.cpp

   1 #include <algorithm>
   2 #include <tr1/functional>
   3 #include <msg/msg.h>
   4 #include <xbt/log.h>
   5
   6 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(comm);
   7
   8 #include "misc.h"
   9 #include "options.h"
  10 #include "simgrid_features.h"
  11 #include "tracing.h"
  12
  13 #include "communicator.h"
  14
  15 namespace {
  16
  17     void check_for_lost_messages(size_t size, const char* descr)
  18     {
  19         if (size)
  20             XBT_WARN("lost %zu %s message%s!", size, descr, ESSE(size));
  21     }
  22
  23 }
  24
  25 communicator::communicator()
  26     : host(static_cast<hostdata*>(MSG_host_get_data(MSG_host_self())))
  27 {
  28     using std::tr1::bind;
  29     receiver_thread = new_msg_thread("receiver",
  30                                      bind(&communicator::receiver, this));
  31     receiver_thread->start();
  32 }
  33
  34 communicator::~communicator()
  35 {
  36     m_task_t task;
  37
  38     XBT_DEBUG("send finalize to receiver/ctrl");
  39     task = MSG_task_create("finalize", 0.0, 0, NULL);
  40     MSG_task_send(task, host->get_ctrl_mbox());
  41
  42     XBT_DEBUG("send finalize to receiver/data");
  43     task = MSG_task_create("finalize", 0.0, 0, NULL);
  44     MSG_task_send(task, host->get_data_mbox());
  45
  46     receiver_thread->wait();
  47     delete receiver_thread;
  48
  49     check_for_lost_messages(ctrl_received.size(), "received ctrl");
  50     check_for_lost_messages(data_received.size(), "received data");
  51     check_for_lost_messages(ctrl_sent.size(), "sent ctrl");
  52     check_for_lost_messages(data_sent.size(), "sent data");
  53 }
  54
  55 msg_comm_t communicator::real_send(const char* dest, message* msg)
  56 {
  57     XBT_DEBUG("send %s to %s", msg->to_string().c_str(), dest);
  58     double msg_size = sizeof *msg;
  59     if (msg->get_type() == message::LOAD)
  60         msg_size += opt::comm_cost(msg->get_amount());
  61     m_task_t task = MSG_task_create("message", 0.0, msg_size, msg);
  62     TRACE_msg_set_task_category(task,
  63                                 msg->get_type() == message::LOAD ?
  64                                 TRACE_CAT_DATA : TRACE_CAT_CTRL);
  65     return MSG_task_isend(task, dest);
  66 }
  67
  68 void communicator::real_flush(sent_comm_type& sent_comm, bool wait)
  69 {
  70     sent_comm_type::iterator bound;
  71     bound = std::remove_if(sent_comm.begin(), sent_comm.end(),
  72                            comm_test_n_destroy);
  73     sent_comm.erase(bound, sent_comm.end());
  74     if (wait && !sent_comm.empty()) {
  75         size_t size = sent_comm.size();
  76         msg_comm_t* comms = new msg_comm_t[size];
  77         std::copy(sent_comm.begin(), sent_comm.end(), comms);
  78         sent_comm.clear();
  79         MSG_comm_waitall(comms, size, -1.0);
  80         if (!MSG_WAIT_DESTROYS_COMMS)
  81             std::for_each(comms, comms + size, comm_check_n_destroy);
  82         delete[] comms;
  83     }
  84 }
  85
  86 void communicator::receiver()
  87 {
  88     xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
  89     struct channel {
  90         msg_comm_t comm;
  91         m_task_t task;
  92         const char* mbox;
  93         message_queue& received;
  94     };
  95     channel chan[] = { { NULL, NULL, host->get_ctrl_mbox(), ctrl_received },
  96                        { NULL, NULL, host->get_data_mbox(), data_received } };
  97     const int chan_size = (sizeof chan) / (sizeof chan[0]);
  98
  99     for (int i = 0 ; i < chan_size ; ++i) {
 100         chan[i].comm = MSG_task_irecv(&chan[i].task, chan[i].mbox);
 101         xbt_dynar_push(comms, &chan[i].comm);
 102     }
 103
 104     while (!xbt_dynar_is_empty(comms)) {
 105
 106         int index = MSG_comm_waitany(comms);
 107         msg_comm_t finished_comm = xbt_dynar_get_as(comms, index, msg_comm_t);
 108         channel* ch;
 109
 110         for (ch = chan ; ch->comm != finished_comm ; ++ch)
 111             /* nop */;
 112
 113         comm_check_n_destroy(ch->comm);
 114         if (strcmp(MSG_task_get_name(ch->task), "finalize")) {
 115             XBT_DEBUG("received message on %s", ch->mbox);
 116             ch->received.push(ch->task);
 117             ch->task = NULL;
 118             ch->comm = MSG_task_irecv(&ch->task, ch->mbox);
 119             xbt_dynar_set_as(comms, index, msg_comm_t, ch->comm);
 120         } else {
 121             XBT_DEBUG("received finalize on %s", ch->mbox);
 122             MSG_task_destroy(ch->task);
 123             ch->task = NULL;
 124             ch->comm = NULL;
 125             xbt_dynar_remove_at(comms, index, NULL);
 126         }
 127
 128     }
 129     xbt_dynar_free(&comms);
 130 }
 131
 132 void communicator::comm_check_n_destroy(msg_comm_t comm)
 133 {
 134     xbt_assert(MSG_comm_get_status(comm) == MSG_OK);
 135     MSG_comm_destroy(comm);
 136 }
 137
 138 bool communicator::comm_test_n_destroy(msg_comm_t comm)
 139 {
 140     if (MSG_comm_test(comm)) {
 141         comm_check_n_destroy(comm);
 142         return true;
 143     } else
 144         return false;
 145 }
 146
 147 // Local variables:
 148 // mode: c++
 149 // End: