#include <algorithm>
#include <cstring>
+#include <tr1/functional>
+#include <sstream>
#include <msg/msg.h>
#include <xbt/log.h>
-#include "communicator.h"
-#include "simgrid_features.h"
-// XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simu);
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(comm, simu,
- "Messages from asynchronous pipes");
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(comm);
-namespace {
+#include "misc.h"
+#include "options.h"
+#include "simgrid_features.h"
+#include "tracing.h"
- bool comm_test_n_destroy(msg_comm_t& comm)
- {
- if (MSG_comm_test(comm)) {
- MSG_comm_destroy(comm);
- return true;
- } else
- return false;
- }
+#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;
+ return oss.str();
}
-class communicator::message {
-public:
- message(message_type t, double a): type(t), amount(a) { }
-
- message_type type;
- double amount;
-};
-
communicator::communicator()
+ : host(static_cast<hostdata*>(MSG_host_get_data(MSG_host_self())))
+ , ctrl_task(NULL)
+ , ctrl_comm(NULL)
+ , data_task(NULL)
+ , data_comm(NULL)
+ , receiver_mutex(xbt_mutex_init())
+ , receiver_cond(xbt_cond_init())
{
- const char* hostname = MSG_host_get_name(MSG_host_self());
- ctrl_mbox = bprintf("%s_ctrl", hostname);
- ctrl_task = NULL;
- ctrl_comm = MSG_task_irecv(&ctrl_task, ctrl_mbox);
-
- data_mbox = bprintf("%s_data", hostname);
- data_task = NULL;
- data_comm = MSG_task_irecv(&data_task, data_mbox);
+ 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()
{
- // fixme: don't know how to free pending communications
- // (data_comm, ctrl_comm and sent_comm)
+ 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());
- free(data_mbox);
- free(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());
- flush_sent();
+ 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)
+ XBT_WARN("ctrl_comm is pending!");
+ if (data_comm)
+ 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())
- WARN1("Lost %ld send communications!", (long )sent_comm.size());
-}
+ XBT_WARN("lost %zu sent message%s!",
+ sent_comm.size(), ESSE(sent_comm.size()));
-void communicator::send_info(const neighbor& dest, double amount)
-{
- message* msg = new message(INFO_MSG, amount);
- m_task_t task = MSG_task_create("load msg", 0.0, sizeof *msg, msg);
- send(dest.get_ctrl_mbox(), task);
+ xbt_cond_destroy(receiver_cond);
+ xbt_mutex_destroy(receiver_mutex);
}
-void communicator::send_credit(const neighbor& dest, double amount)
+void communicator::send(const char* dest, message* msg)
{
- message* msg = new message(CREDIT_MSG, amount);
- m_task_t task = MSG_task_create("credit msg", 0.0, sizeof *msg, msg);
- send(dest.get_ctrl_mbox(), task);
+ 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);
}
-void communicator::send_load(const neighbor& dest, double amount)
+bool communicator::recv(message*& msg, m_host_t& from, double timeout)
{
- m_task_t task = MSG_task_create("data msg", 0.0, amount, NULL);
- send(dest.get_data_mbox(), task);
-}
+ 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);
+ }
-void communicator::send(const char* dest, m_task_t task)
-{
- sent_comm.push_back(MSG_task_isend(task, dest));
- flush_sent();
+ 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);
+
+ XBT_DEBUG("received %s from %s",
+ msg->to_string().c_str(), MSG_host_get_name(from));
+
+ return true;
}
-bool communicator::recv_info(double& amount, m_host_t& from)
+void communicator::flush(bool wait)
{
- return recv_ctrl(INFO_MSG, amount, from);
+ sent_comm.remove_if(comm_test_n_destroy);
+ if (wait && !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(),
+ comm_check_n_destroy);
+ sent_comm.clear();
+ }
}
-bool communicator::recv_credit(double& amount, m_host_t& from)
+int communicator::receiver_wrapper(int, char* [])
{
- return recv_ctrl(CREDIT_MSG, amount, from);
+ 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;
}
-bool communicator::recv_load(double& amount, m_host_t& from)
+void communicator::receiver1(msg_comm_t& comm, m_task_t& task, const char* mbox)
{
- bool res = comm_test_n_destroy(data_comm);
- if (res) {
- amount = MSG_task_get_data_size(data_task);
- from = MSG_task_get_source(data_task);
- MSG_task_destroy(data_task);
- data_task = NULL;
- data_comm = MSG_task_irecv(&data_task, data_mbox);
+ comm_check_n_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;
}
- return res;
}
-bool communicator::recv_ctrl(message_type type, double& amount, m_host_t& from)
+void communicator::receiver()
{
- bool res = MSG_comm_test(ctrl_comm);
- if (res) {
- message* msg = (message* )MSG_task_get_data(ctrl_task);
- if (msg->type == type) {
- MSG_comm_destroy(ctrl_comm);
- amount = msg->amount;
- from = MSG_task_get_source(ctrl_task);
- delete msg;
- MSG_task_destroy(ctrl_task);
- ctrl_task = NULL;
- ctrl_comm = MSG_task_irecv(&ctrl_task, ctrl_mbox);
- } else {
- res = false;
- }
+ 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);
}
- return res;
+ xbt_dynar_free(&comms);
}
-int communicator::send_backlog()
+void communicator::comm_check_n_destroy(msg_comm_t comm)
{
- flush_sent();
- return sent_comm.size();
+ xbt_assert(MSG_comm_get_status(comm) == MSG_OK);
+ MSG_comm_destroy(comm);
}
-void communicator::flush_sent()
+bool communicator::comm_test_n_destroy(msg_comm_t comm)
{
- std::remove_if(sent_comm.begin(), sent_comm.end(), comm_test_n_destroy);
+ if (MSG_comm_test(comm)) {
+ comm_check_n_destroy(comm);
+ return true;
+ } else
+ return false;
}
// Local variables:
