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