-#include "communicator.h"
-
#include <algorithm>
+#include <cstring>
#include <tr1/functional>
#include <sstream>
#include <msg/msg.h>
#include <xbt/log.h>
-#include "simgrid_features.h"
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(comm);
+
#include "misc.h"
#include "options.h"
+#include "simgrid_features.h"
+#include "tracing.h"
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(comm);
+#include "communicator.h"
std::string message::to_string()
{
static const char* str[] = { "INFO", "CREDIT", "LOAD",
"CTRL_CLOSE", "DATA_CLOSE" };
std::ostringstream oss;
- oss << str[type] << " (" << amount << ")";
+ oss << str[type] << ": " << amount;
return oss.str();
}
-const int communicator::send_count_before_flush = 128;
-
communicator::communicator()
- : host((hostdata* )MSG_host_get_data(MSG_host_self()))
- , send_counter(0)
- , ctrl_task(NULL)
- , ctrl_comm(NULL)
- , ctrl_close_is_last(false)
- , data_task(NULL)
- , data_comm(NULL)
- , data_close_is_last(false)
+ : host(static_cast<hostdata*>(MSG_host_get_data(MSG_host_self())))
+ , receiver_mutex(xbt_mutex_init())
+ , receiver_cond(xbt_cond_init())
{
+ xbt_mutex_acquire(receiver_mutex);
+ receiver_thread =
+ MSG_process_create("receiver", communicator::receiver_wrapper,
+ this, MSG_host_self());
+ // wait for the receiver to be ready
+ xbt_cond_wait(receiver_cond, receiver_mutex);
+ xbt_mutex_release(receiver_mutex);
}
communicator::~communicator()
{
- if (ctrl_comm)
- WARN0("ctrl_comm is pending!");
- if (data_comm)
- WARN0("data_comm is pending!");
+ m_task_t task;
+
+ XBT_DEBUG("send finalize to receiver/ctrl");
+ task = MSG_task_create("finalize", 0.0, 0, NULL);
+ MSG_task_send(task, host->get_ctrl_mbox());
+
+ XBT_DEBUG("send finalize to receiver/data");
+ task = MSG_task_create("finalize", 0.0, 0, NULL);
+ MSG_task_send(task, host->get_data_mbox());
+
+ xbt_mutex_acquire(receiver_mutex);
+ while (receiver_thread) {
+ XBT_DEBUG("waiting for receiver to terminate");
+ xbt_cond_wait(receiver_cond, receiver_mutex);
+ }
+ xbt_mutex_release(receiver_mutex);
+
+ if (!received.empty())
+ XBT_WARN("lost %zu received message%s!",
+ received.size(), ESSE(received.size()));
if (!sent_comm.empty())
- WARN2("lost %ld send communication%s!",
- (long )sent_comm.size(), ESSE(sent_comm.size()));
-}
+ XBT_WARN("lost %zu sent message%s!",
+ sent_comm.size(), ESSE(sent_comm.size()));
-void communicator::listen()
-{
- ctrl_comm = MSG_task_irecv(&ctrl_task, get_ctrl_mbox());
- data_comm = MSG_task_irecv(&data_task, get_data_mbox());
+ xbt_cond_destroy(receiver_cond);
+ xbt_mutex_destroy(receiver_mutex);
}
void communicator::send(const char* dest, message* msg)
{
+ XBT_DEBUG("send %s to %s", msg->to_string().c_str(), dest);
double msg_size = sizeof *msg;
if (msg->get_type() == message::LOAD)
msg_size += opt::comm_cost(msg->get_amount());
m_task_t task = MSG_task_create("message", 0.0, msg_size, msg);
+ TRACE_msg_set_task_category(task,
+ msg->get_type() == message::LOAD ?
+ TRACE_CAT_DATA : TRACE_CAT_CTRL);
msg_comm_t comm = MSG_task_isend(task, dest);
sent_comm.push_back(comm);
-
- if (++send_counter >= send_count_before_flush) {
- flush(false);
- send_counter = 0;
- }
}
-bool communicator::recv(message*& msg, m_host_t& from, bool wait)
+bool communicator::recv(message*& msg, m_host_t& from, double timeout)
{
- bool restart;
- msg = NULL;
-
- do {
- if (ctrl_comm && comm_test_n_destroy(ctrl_comm)) {
- msg = (message* )MSG_task_get_data(ctrl_task);
- from = MSG_task_get_source(ctrl_task);
- MSG_task_destroy(ctrl_task);
- ctrl_task = NULL;
- ctrl_comm =
- (!ctrl_close_is_last || msg->get_type() != message::CTRL_CLOSE)
- ? MSG_task_irecv(&ctrl_task, get_ctrl_mbox())
- : NULL;
-
- } else if (data_comm && comm_test_n_destroy(data_comm)) {
- msg = (message* )MSG_task_get_data(data_task);
- from = MSG_task_get_source(data_task);
- MSG_task_destroy(data_task);
- data_task = NULL;
- data_comm =
- (!data_close_is_last || msg->get_type() != message::DATA_CLOSE)
- ? MSG_task_irecv(&data_task, get_data_mbox())
- : NULL;
+ if (timeout != 0) {
+ volatile double deadline =
+ timeout > 0 ? MSG_get_clock() + timeout : 0.0;
+ xbt_mutex_acquire(receiver_mutex);
+ while (received.empty() && (!deadline || deadline > MSG_get_clock())) {
+ xbt_ex_t e;
+ XBT_DEBUG("waiting for a message to come");
+ TRY {
+ if (deadline)
+ xbt_cond_timedwait(receiver_cond, receiver_mutex,
+ deadline - MSG_get_clock());
+ else
+ xbt_cond_wait(receiver_cond, receiver_mutex);
+ }
+ CATCH (e) {
+ if (e.category != timeout_error)
+ RETHROW;
+ xbt_ex_free(e);
+ }
}
+ xbt_mutex_release(receiver_mutex);
+ }
- restart = wait && !msg && (ctrl_comm || data_comm);
- if (restart) {
- xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
- if (ctrl_comm)
- xbt_dynar_push(comms, &ctrl_comm);
- if (data_comm)
- xbt_dynar_push(comms, &data_comm);
- MSG_comm_waitany(comms);
- xbt_dynar_free(&comms);
- }
- } while (restart);
+ if (received.empty())
+ return false;
+
+ m_task_t task = received.front();
+ received.pop();
+ msg = static_cast<message*>(MSG_task_get_data(task));
+ from = MSG_task_get_source(task);
+ MSG_task_destroy(task);
- return msg != NULL;
+ XBT_DEBUG("received %s from %s",
+ msg->to_string().c_str(), MSG_host_get_name(from));
+
+ return true;
}
void communicator::flush(bool wait)
{
- using namespace std::tr1;
- using namespace std::tr1::placeholders;
-
sent_comm.remove_if(comm_test_n_destroy);
if (wait && !sent_comm.empty()) {
- xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
- while (!sent_comm.empty()) {
+ msg_comm_t comms[sent_comm.size()];
+ std::copy(sent_comm.begin(), sent_comm.end(), comms);
+ MSG_comm_waitall(comms, sent_comm.size(), -1.0);
+ if (!MSG_WAIT_DESTROYS_COMMS)
std::for_each(sent_comm.begin(), sent_comm.end(),
- bind(xbt_dynar_push,
- comms, bind(misc::address<msg_comm_t>(), _1)));
- MSG_comm_waitany(comms);
- xbt_dynar_reset(comms);
- sent_comm.remove_if(comm_test_n_destroy);
- }
- xbt_dynar_free(&comms);
+ comm_check_n_destroy);
+ sent_comm.clear();
}
}
-void communicator::next_close_on_ctrl_is_last()
+int communicator::receiver_wrapper(int, char* [])
+{
+ communicator* comm;
+ comm = static_cast<communicator*>(MSG_process_get_data(MSG_process_self()));
+ comm->receiver();
+
+ XBT_DEBUG("terminate");
+ xbt_mutex_acquire(comm->receiver_mutex);
+ comm->receiver_thread = NULL;
+ xbt_cond_signal(comm->receiver_cond);
+ xbt_mutex_release(comm->receiver_mutex);
+
+ return 0;
+}
+
+void communicator::receiver()
{
- ctrl_close_is_last = true;
+ xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
+ struct channel {
+ msg_comm_t comm;
+ m_task_t task;
+ const char* mbox;
+ };
+ channel chan[] = { { NULL, NULL, host->get_ctrl_mbox() },
+ { NULL, NULL, host->get_data_mbox() } };
+ const int chan_size = (sizeof chan) / (sizeof chan[0]);
+
+ for (int i = 0 ; i < chan_size ; ++i) {
+ chan[i].comm = MSG_task_irecv(&chan[i].task, chan[i].mbox);
+ xbt_dynar_push(comms, &chan[i].comm);
+ }
+
+ XBT_DEBUG("receiver ready");
+ xbt_mutex_acquire(receiver_mutex);
+ xbt_cond_signal(receiver_cond); // signal master that we are ready
+ xbt_mutex_release(receiver_mutex);
+
+ while (!xbt_dynar_is_empty(comms)) {
+
+ int index = MSG_comm_waitany(comms);
+ msg_comm_t finished_comm = xbt_dynar_get_as(comms, index, msg_comm_t);
+ channel* ch;
+
+ for (ch = chan ; ch->comm != finished_comm ; ++ch)
+ /* nop */;
+
+ comm_check_n_destroy(ch->comm);
+ if (strcmp(MSG_task_get_name(ch->task), "finalize")) {
+ XBT_DEBUG("received message on %s", ch->mbox);
+ xbt_mutex_acquire(receiver_mutex);
+ received.push(ch->task);
+ xbt_cond_signal(receiver_cond);
+ xbt_mutex_release(receiver_mutex);
+ ch->task = NULL;
+ ch->comm = MSG_task_irecv(&ch->task, ch->mbox);
+ xbt_dynar_set_as(comms, index, msg_comm_t, ch->comm);
+ } else {
+ XBT_DEBUG("received finalize on %s", ch->mbox);
+ MSG_task_destroy(ch->task);
+ ch->task = NULL;
+ ch->comm = NULL;
+ xbt_dynar_remove_at(comms, index, NULL);
+ }
+
+ }
+ xbt_dynar_free(&comms);
}
-void communicator::next_close_on_data_is_last()
+void communicator::comm_check_n_destroy(msg_comm_t comm)
{
- data_close_is_last = true;
+ xbt_assert(MSG_comm_get_status(comm) == MSG_OK);
+ MSG_comm_destroy(comm);
}
bool communicator::comm_test_n_destroy(msg_comm_t comm)
{
if (MSG_comm_test(comm)) {
- MSG_comm_destroy(comm);
+ comm_check_n_destroy(comm);
return true;
} else
return false;
