X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/649bd7b5c26e344eee9bd9a70625e644d302ba3d..7c369294a45d31c519186fcb6cb10670ec1c1ac8:/examples/s4u/async-wait/s4u-async-wait.cpp diff --git a/examples/s4u/async-wait/s4u-async-wait.cpp b/examples/s4u/async-wait/s4u-async-wait.cpp index 86dd403676..b4c36a6be4 100644 --- a/examples/s4u/async-wait/s4u-async-wait.cpp +++ b/examples/s4u/async-wait/s4u-async-wait.cpp @@ -3,112 +3,115 @@ /* 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 - #include +/* This example shows how to use simgrid::s4u::this_actor::wait() to wait for a given communication. + * + * As for the other asynchronous examples, the sender initiate all the messages it wants to send and + * pack the resulting simgrid::s4u::CommPtr objects in a vector. All messages thus occurs concurrently. + * + * The sender then loops until there is no ongoing communication. + */ + +#include "simgrid/s4u.hpp" +#include "xbt/str.h" +#include +#include XBT_LOG_NEW_DEFAULT_CATEGORY(msg_async_wait, "Messages specific for this s4u example"); -/* Main function of the Sender process */ -class sender { - long messages_count; - long receivers_count; - double sleep_start_time; /* - start time */ - double sleep_test_time; /* - test time */ - double msg_size; - simgrid::s4u::MailboxPtr mbox; - +class Sender { + long messages_count; /* - number of tasks */ + long receivers_count; /* - number of receivers */ + double msg_size; /* - communication cost in bytes */ + public: - explicit sender(std::vector args) -{ - xbt_assert(args.size() == 7, "The sender function expects 6 arguments from the XML deployment file"); - messages_count = std::stol(args[1]); /* - number of tasks */ - msg_size = std::stod(args[2]); /* - computational cost */ - double task_comm_size = std::stod(args[3]); /* - communication cost */ - receivers_count = std::stol(args[4]); /* - number of receivers */ - double sleep_start_time = std::stod(args[5]); /* - start time */ - double sleep_test_time = std::stod(args[6]); /* - test time */ - XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time); -} -void operator()() -{ - for (int i = 0; i < messages_count; i++) { - char mailbox[80]; - char taskname[80]; - - std::string mbox_name = std::string("receiver-") + std::to_string(i % receivers_count); - mbox = simgrid::s4u::Mailbox::byName(mbox_name); - snprintf(mailbox,79, "receiver-%ld", i % receivers_count); - snprintf(taskname,79, "Task_%d", i); - - /* Create a communication */ - simgrid::s4u::CommPtr comm = mbox->put_async((void*)mailbox, msg_size); - XBT_INFO("Send to receiver-%ld Task_%d", i % receivers_count, i); - } - - for (int i = 0; i < receivers_count; i++) { - char mailbox[80]; - char* payload = xbt_strdup("finalize"); - snprintf(mailbox, 79, "receiver-%d", i); - simgrid::s4u::CommPtr comm = mbox->put_async((void*)payload, 0); - XBT_INFO("Send to receiver-%d finalize", i); + explicit Sender(std::vector args) + { + xbt_assert(args.size() == 4, "Expecting 3 parameters from the XML deployment file but got %zu", args.size()); + messages_count = std::stol(args[1]); + msg_size = std::stod(args[2]); + receivers_count = std::stol(args[3]); } + void operator()() + { + std::vector pending_comms; - XBT_INFO("Goodbye now!"); + /* 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()); + /* Create a communication representing the ongoing communication */ + simgrid::s4u::CommPtr comm = mbox->put_async((void*)payload, msg_size); + /* Add this comm to the vector of all known comms */ + pending_comms.push_back(comm); + } + + /* Start sending messages to let the workers know that they should stop */ + for (int i = 0; i < receivers_count; i++) { + std::string mboxName = std::string("receiver-") + std::to_string(i % receivers_count); + simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::byName(mboxName); + char* payload = xbt_strdup("finalize"); // Make a copy of the data we will send + + simgrid::s4u::CommPtr comm = mbox->put_async((void*)payload, 0); + pending_comms.push_back(comm); + XBT_INFO("Send 'finalize' to 'receiver-%ld'", i % receivers_count); + } + XBT_INFO("Done dispatching all messages"); + + /* Now that all message exchanges were initiated, wait for their completion, in order of creation. */ + while (not pending_comms.empty()) { + simgrid::s4u::CommPtr comm = pending_comms.back(); + comm->wait(); // we could provide a timeout as a parameter + pending_comms.pop_back(); // remove it from the list + } + + XBT_INFO("Goodbye now!"); + } }; -/* Receiver process expects 3 arguments: */ -class receiver { - int id; - double sleep_test_time; - double sleep_start_time; +/* Receiver actor expects 1 argument: its ID */ +class Receiver { simgrid::s4u::MailboxPtr mbox; - + public: - explicit receiver(std::vector args) + explicit Receiver(std::vector args) { - xbt_assert(args.size() == 4, "The relay_runner function does not accept any parameter from the XML deployment file"); - id = std::stoi(args[1]); /* - unique id */ - sleep_start_time = std::stod(args[2]); /* - start time */ - sleep_test_time = std::stod(args[3]); /* - test time */ - XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time); - std::string mbox_name = std::string("receiver-") + std::to_string(id); - mbox = simgrid::s4u::Mailbox::byName(mbox_name); -} + xbt_assert(args.size() == 2, "Expecting one parameter from the XML deployment file but got %zu", args.size()); + std::string mboxName = std::string("receiver-") + args[1]; + mbox = simgrid::s4u::Mailbox::byName(mboxName); + } -void operator()() -{ - char mailbox[80]; - snprintf(mailbox,79, "receiver-%d", id); - while (1) { - char* received = static_cast(mbox->get()); - XBT_INFO("Wait to receive a task"); - XBT_INFO("I got a '%s'.", received); - if (std::strcmp(received, "finalize") == 0) { /* If it's a finalize message, we're done */ + void operator()() + { + XBT_INFO("Wait for my first message"); + while (1) { + char* received = static_cast(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; + } + /* Otherwise receiving the message was all we were supposed to do */ xbt_free(received); - break; } - /* Otherwise receiving the message was all we were supposed to do */ - xbt_free(received); } -} }; int main(int argc, char *argv[]) { - simgrid::s4u::Engine* e = new simgrid::s4u::Engine(&argc, argv); - - xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]); - - e->registerFunction("sender"); - e->registerFunction("receiver"); - - e->loadPlatform(argv[1]); - e->loadDeployment(argv[2]); - e->run(); - - return 0; + xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]); + + simgrid::s4u::Engine e(&argc, argv); + e.registerFunction("sender"); + e.registerFunction("receiver"); + + e.loadPlatform(argv[1]); + e.loadDeployment(argv[2]); + e.run(); + + return 0; }