-/* Copyright (c) 2010-2016. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2010-2017. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
- #include "simgrid/s4u.hpp"
- #include "xbt/str.h"
- #include <cstdlib>
- #include <iostream>
+/* This example shows how to use asynchronous communications.
+ *
+ * The sender initiate all the messages it wants to send, and then block for their completion.
+ * All messages thus occurs concurrently.
+ *
+ * On the receiver side, the reception is synchronous.
+ *
+ * TODO: this example is supposed to test the waitall function, but this is not ported to s4u yet.
+ *
+ */
+
+#include "simgrid/s4u.hpp"
+#include "xbt/str.h"
+#include <cstdlib>
+#include <iostream>
XBT_LOG_NEW_DEFAULT_CATEGORY(msg_async_waitall, "Messages specific for this msg example");
class sender {
- long number_of_tasks = 0; /* - Number of tasks */
- long receivers_count = 0; /* - Number of workers */
+ long messages_count;
+ long receivers_count;
+ double msg_size; /* in bytes */
public:
explicit sender(std::vector<std::string> args)
{
xbt_assert(args.size()== 4, "This function expects 5 parameters from the XML deployment file");
- number_of_tasks = std::stol(args[0]);
- double task_comp_size = std::stod(args[1]);
- double task_comm_size = std::stod(args[2]);
+ messages_count = std::stol(args[1]);
+ msg_size = std::stod(args[2]);
receivers_count = std::stol(args[3]);
}
void operator()()
{
- simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::byName("sender_mailbox");
- simgrid::s4u::CommPtr* comms = new simgrid::s4u::CommPtr[number_of_tasks + receivers_count] ;
-
- for (int i = 0; i < number_of_tasks; i++) {
- char mailbox[80];
- char taskname[80];
- snprintf(mailbox,79, "receiver-%ld", i % receivers_count);
- snprintf(taskname,79, "Task_%d", i);
- comms[i] = mbox->put_async((void*)taskname, 42);
- XBT_INFO("Send to receiver-%ld Task_%d", i % receivers_count, i);
+ simgrid::s4u::CommPtr* comms = new simgrid::s4u::CommPtr[messages_count + receivers_count];
+
+ /* Start dispatching all messages to receivers, in a round robin fashion */
+ for (int i = 0; i < messages_count; i++) {
+
+ std::string mboxName = std::string("receiver-") + std::to_string(i % receivers_count);
+ simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::byName(mboxName);
+ std::string msgName = std::string("Message ") + std::to_string(i);
+ char* payload = xbt_strdup(msgName.c_str()); // copy the data we send: 'msgName' is not a stable storage location
+
+ XBT_INFO("Send '%s' to '%s'", msgName.c_str(), mboxName.c_str());
+ comms[i] = mbox->put_async((void*)payload, msg_size);
}
+ /* Start sending messages to let the workers know that they should stop */
for (int i = 0; i < receivers_count; i++) {
- char mailbox[80];
- snprintf(mailbox,79, "receiver-%ld", i % receivers_count);
- comms[i + number_of_tasks] = mbox->put_async((void*)"finalize", 42);
- XBT_INFO("Send to receiver-%ld finalize", i % receivers_count);
+ std::string mbox_name = std::string("receiver-") + std::to_string(i % receivers_count);
+ simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::byName(mbox_name);
+ char* payload = xbt_strdup("finalize"); // Make a copy of the data we will send
+
+ comms[i + messages_count] = mbox->put_async((void*)payload, 0);
+ XBT_INFO("Send 'finalize' to 'receiver-%ld'", i % receivers_count);
}
+ XBT_INFO("Done dispatching all messages");
- /* Here we are waiting for the completion of all communications */
- for (int i = 0; i < number_of_tasks + receivers_count; i++)
+ /* Now that all message exchanges were initiated, this loop waits for the termination of them all */
+ for (int i = 0; i < messages_count + receivers_count; i++)
comms[i]->wait();
delete [] comms;
};
class receiver {
+ simgrid::s4u::MailboxPtr mbox;
+
public:
explicit receiver(std::vector<std::string> args)
{
- xbt_assert(args.size() == 1,"This function expects 1 parameter from the XML deployment file");
- int id = xbt_str_parse_int(args[0].c_str(), "Any process of this example must have a numerical name, not %s");
- char mailbox[80];
- snprintf(mailbox,79, "receiver-%d", id);
-
- simgrid::s4u::this_actor::sleep_for(10.0);
-
- XBT_INFO("I'm done. See you!");
+ xbt_assert(args.size() == 2, "This function expects 2 parameters from the XML deployment file but got %zu",
+ args.size());
+ int id = xbt_str_parse_int(args[1].c_str(), "Any process of this example must have a numerical name, not %s");
+ std::string mbox_name = std::string("receiver-") + std::to_string(id);
+ mbox = simgrid::s4u::Mailbox::byName(mbox_name);
}
void operator()()
{
- simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::byName("receiver_mailbox");
+ XBT_INFO("Wait for my first message");
while (1) {
- XBT_INFO("Wait to receive a task");
- void *received = NULL;
- simgrid::s4u::CommPtr comm = mbox->get_async(&received);
- comm->wait();
- std::string* receivedStr = static_cast<std::string*>(received);
- if (receivedStr->compare("finalize") == 0) {
- delete receivedStr;
+ char* received = static_cast<char*>(mbox->get());
+ XBT_INFO("I got a '%s'.", received);
+ if (std::strcmp(received, "finalize") == 0) { /* If it's a finalize message, we're done */
+ xbt_free(received);
break;
}
- double *comp_size = static_cast<double*>(received);
- /* - Otherwise, process the task */
- simgrid::s4u::this_actor::execute(*comp_size);
+ /* - Otherwise receiving the message was all we were supposed to do */
+ xbt_free(received);
}
- XBT_INFO("I'm done. See you!");
}
};
int main(int argc, char *argv[])
{
- simgrid::s4u::Engine *e = new simgrid::s4u::Engine(&argc,argv);
+ simgrid::s4u::Engine* e = new simgrid::s4u::Engine(&argc, argv);
- xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
- "\tExample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
+ xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
- e->registerFunction<sender>("sender");
- e->registerFunction<receiver>("receiver");
+ e->registerFunction<sender>("sender");
+ e->registerFunction<receiver>("receiver");
+ e->loadPlatform(argv[1]);
e->loadDeployment(argv[2]);
e->run();
#! ./tesh
-p Test1 MSG_comm_waitall() for sender
-! output sort 19
-$ $SG_TEST_EXENV ${bindir:=.}/async-waitall ${srcdir:=.}/small_platform_fatpipe.xml ${srcdir:=.}/../msg/async-waitall/async-waitall_d.xml "--log=root.fmt:[%10.6r]%e(%i:%P@%h)%e%m%n"
-> [ 0.000000] (1:sender@Tremblay) Send to receiver-0 Task_0
-> [ 0.000000] (1:sender@Tremblay) Send to receiver-0 Task_1
-> [ 0.000000] (1:sender@Tremblay) Send to receiver-0 Task_2
-> [ 0.000000] (1:sender@Tremblay) Send to receiver-0 finalize
-> [ 10.000000] (2:receiver@Ruby) Wait to receive a task
-> [ 10.004022] (2:receiver@Ruby) Received "Task_0"
-> [ 10.004022] (2:receiver@Ruby) Processing "Task_0"
-> [ 10.513732] (2:receiver@Ruby) "Task_0" done
-> [ 10.513732] (2:receiver@Ruby) Wait to receive a task
-> [ 10.517753] (2:receiver@Ruby) Received "Task_1"
-> [ 10.517753] (2:receiver@Ruby) Processing "Task_1"
-> [ 11.027463] (2:receiver@Ruby) "Task_1" done
-> [ 11.027463] (2:receiver@Ruby) Wait to receive a task
-> [ 11.031485] (2:receiver@Ruby) Received "Task_2"
-> [ 11.031485] (2:receiver@Ruby) Processing "Task_2"
-> [ 11.541195] (2:receiver@Ruby) "Task_2" done
-> [ 11.541195] (2:receiver@Ruby) Wait to receive a task
-> [ 11.543146] (0:maestro@) Simulation time 11.5431
-> [ 11.543146] (1:sender@Tremblay) Goodbye now!
-> [ 11.543146] (2:receiver@Ruby) Received "finalize"
-> [ 11.543146] (2:receiver@Ruby) I'm done. See you!
+$ $SG_TEST_EXENV ${bindir:=.}/s4u_async-waitall ${srcdir:=.}/small_platform_fatpipe.xml ${srcdir:=.}/../s4u/async-waitall/s4u_async-waitall_d.xml "--log=root.fmt:[%10.6r]%e(%i:%P@%h)%e%m%n"
+> [ 0.000000] (1:sender@Tremblay) Send 'Message 0' to 'receiver-0'
+> [ 0.000000] (2:receiver@Ruby) Wait for my first message
+> [ 0.000000] (3:receiver@Perl) Wait for my first message
+> [ 0.000000] (1:sender@Tremblay) Send 'Message 1' to 'receiver-1'
+> [ 0.000000] (1:sender@Tremblay) Send 'Message 2' to 'receiver-0'
+> [ 0.000000] (1:sender@Tremblay) Send 'Message 3' to 'receiver-1'
+> [ 0.000000] (1:sender@Tremblay) Send 'Message 4' to 'receiver-0'
+> [ 0.000000] (1:sender@Tremblay) Send 'finalize' to 'receiver-0'
+> [ 0.000000] (1:sender@Tremblay) Send 'finalize' to 'receiver-1'
+> [ 0.000000] (1:sender@Tremblay) Done dispatching all messages
+> [ 0.004022] (2:receiver@Ruby) I got a 'Message 0'.
+> [ 0.004022] (3:receiver@Perl) I got a 'Message 1'.
+> [ 0.008043] (2:receiver@Ruby) I got a 'Message 2'.
+> [ 0.008043] (3:receiver@Perl) I got a 'Message 3'.
+> [ 0.009995] (3:receiver@Perl) I got a 'finalize'.
+> [ 0.012065] (2:receiver@Ruby) I got a 'Message 4'.
+> [ 0.014016] (2:receiver@Ruby) I got a 'finalize'.
+> [ 0.014016] (1:sender@Tremblay) Goodbye now!
