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_type::iterator bound;
  64     bound = std::remove_if(sent_comm.begin(), sent_comm.end(),
  65                            comm_test_n_destroy);
  66     sent_comm.erase(bound, sent_comm.end());
  67     if (wait && !sent_comm.empty()) {
  68         msg_comm_t comms[sent_comm.size()];
  69         std::copy(sent_comm.begin(), sent_comm.end(), comms);
  70         MSG_comm_waitall(comms, sent_comm.size(), -1.0);
  71         if (!MSG_WAIT_DESTROYS_COMMS)
  72             std::for_each(sent_comm.begin(), sent_comm.end(),
  73                           comm_check_n_destroy);
  74         sent_comm.clear();
  75     }
  76 }
  77
  78 bool communicator::recv(message*& msg, m_host_t& from, double timeout)
  79 {
  80     XBT_DEBUG("waiting for a message to come");
  81     bool recvd = received.pop(msg, from, timeout);
  82     if (recvd)
  83         XBT_DEBUG("received %s from %s",
  84                   msg->to_string().c_str(), MSG_host_get_name(from));
  85     return recvd;
  86 }
  87
  88 void communicator::receiver()
  89 {
  90     xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
  91     struct channel {
  92         msg_comm_t comm;
  93         m_task_t task;
  94         const char* mbox;
  95     };
  96     channel chan[] = { { NULL, NULL, host->get_ctrl_mbox() },
  97                        { NULL, NULL, host->get_data_mbox() } };
  98     const int chan_size = (sizeof chan) / (sizeof chan[0]);
  99
 100     for (int i = 0 ; i < chan_size ; ++i) {
 101         chan[i].comm = MSG_task_irecv(&chan[i].task, chan[i].mbox);
 102         xbt_dynar_push(comms, &chan[i].comm);
 103     }
 104
 105     while (!xbt_dynar_is_empty(comms)) {
 106
 107         int index = MSG_comm_waitany(comms);
 108         msg_comm_t finished_comm = xbt_dynar_get_as(comms, index, msg_comm_t);
 109         channel* ch;
 110
 111         for (ch = chan ; ch->comm != finished_comm ; ++ch)
 112             /* nop */;
 113
 114         comm_check_n_destroy(ch->comm);
 115         if (strcmp(MSG_task_get_name(ch->task), "finalize")) {
 116             XBT_DEBUG("received message on %s", ch->mbox);
 117             received.push(ch->task);
 118             ch->task = NULL;
 119             ch->comm = MSG_task_irecv(&ch->task, ch->mbox);
 120             xbt_dynar_set_as(comms, index, msg_comm_t, ch->comm);
 121         } else {
 122             XBT_DEBUG("received finalize on %s", ch->mbox);
 123             MSG_task_destroy(ch->task);
 124             ch->task = NULL;
 125             ch->comm = NULL;
 126             xbt_dynar_remove_at(comms, index, NULL);
 127         }
 128
 129     }
 130     xbt_dynar_free(&comms);
 131 }
 132
 133 void communicator::comm_check_n_destroy(msg_comm_t comm)
 134 {
 135     xbt_assert(MSG_comm_get_status(comm) == MSG_OK);
 136     MSG_comm_destroy(comm);
 137 }
 138
 139 bool communicator::comm_test_n_destroy(msg_comm_t comm)
 140 {
 141     if (MSG_comm_test(comm)) {
 142         comm_check_n_destroy(comm);
 143         return true;
 144     } else
 145         return false;
 146 }
 147
 148 // Local variables:
 149 // mode: c++
 150 // End: