-#include "communicator.h"
-
#include <algorithm>
+#include <cstring>
#include <tr1/functional>
#include <sstream>
#include <msg/msg.h>
#include <xbt/log.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()
{
return oss.str();
}
-const int communicator::send_count_before_flush = 16;
-
communicator::communicator()
- : host((hostdata* )MSG_host_get_data(MSG_host_self()))
- , send_counter(0)
+ : host(static_cast<hostdata*>(MSG_host_get_data(MSG_host_self())))
, ctrl_task(NULL)
, ctrl_comm(NULL)
- , ctrl_close_is_last(false)
, data_task(NULL)
, data_comm(NULL)
- , data_close_is_last(false)
+ , 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()
{
+ m_task_t task;
+
+ XBT_DEBUG("send finalize to receiver/ctrl");
+ task = MSG_task_create("finalize", 0.0, 0, NULL);
+ MSG_task_send(task, get_ctrl_mbox());
+
+ XBT_DEBUG("send finalize to receiver/data");
+ task = MSG_task_create("finalize", 0.0, 0, NULL);
+ MSG_task_send(task, 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 (ctrl_comm)
- WARN0("ctrl_comm is pending!");
+ XBT_WARN("ctrl_comm is pending!");
if (data_comm)
- WARN0("data_comm is pending!");
+ XBT_WARN("data_comm is pending!");
+ 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)
{
- DEBUG2("send %s to %s", msg->to_string().c_str(), dest);
+ 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);
- if (msg)
- DEBUG2("received %s from %s",
- msg->to_string().c_str(), MSG_host_get_name(from));
+ XBT_DEBUG("received %s from %s",
+ msg->to_string().c_str(), MSG_host_get_name(from));
- return msg != NULL;
+ 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()) {
- 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);
+ 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(), MSG_comm_destroy);
+ sent_comm.clear();
}
}
-void communicator::next_close_on_ctrl_is_last()
-{
- ctrl_close_is_last = true;
-}
-
-void communicator::next_close_on_data_is_last()
-{
- data_close_is_last = true;
-}
-
bool communicator::comm_test_n_destroy(msg_comm_t comm)
{
if (MSG_comm_test(comm)) {
return false;
}
+int communicator::receiver_wrapper(int, char* [])
+{
+ communicator* comm;
+ comm = static_cast<communicator*>(MSG_process_get_data(MSG_process_self()));
+ int result = 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 result;
+}
+
+void communicator::receiver1(msg_comm_t& comm, m_task_t& task, const char* mbox)
+{
+ MSG_comm_destroy(comm);
+ if (strcmp(MSG_task_get_name(task), "finalize")) {
+ XBT_DEBUG("received message on %s", mbox);
+ xbt_mutex_acquire(receiver_mutex);
+ received.push(task);
+ xbt_cond_signal(receiver_cond);
+ xbt_mutex_release(receiver_mutex);
+ task = NULL;
+ comm = MSG_task_irecv(&task, mbox);
+ } else {
+ XBT_DEBUG("received finalize on %s", mbox);
+ MSG_task_destroy(task);
+ task = NULL;
+ comm = NULL;
+ }
+}
+
+int communicator::receiver()
+{
+ ctrl_comm = MSG_task_irecv(&ctrl_task, get_ctrl_mbox());
+ data_comm = MSG_task_irecv(&data_task, get_data_mbox());
+ 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);
+
+ xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
+ while (ctrl_comm || data_comm) {
+
+ if (ctrl_comm)
+ xbt_dynar_push(comms, &ctrl_comm);
+ if (data_comm)
+ xbt_dynar_push(comms, &data_comm);
+ int index = MSG_comm_waitany(comms);
+ msg_comm_t finished_comm = xbt_dynar_get_as(comms, index, msg_comm_t);
+ xbt_dynar_reset(comms);
+
+ if (finished_comm == ctrl_comm)
+ receiver1(ctrl_comm, ctrl_task, get_ctrl_mbox());
+ else if (finished_comm == data_comm)
+ receiver1(data_comm, data_task, get_data_mbox());
+ else
+ THROW1(0, 0, "Cannot handle unknown comm -- %p", finished_comm);
+ }
+ xbt_dynar_free(&comms);
+ return 0;
+}
+
// Local variables:
// mode: c++
// End:
