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