X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3ce1a72143c8978e6e5764a3b250d930f3cd4a9b..273c78e00c26cc4cab1460da956e6ccc86b99328:/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 73f3bff50a..0d377bb7cf 100644 --- a/examples/s4u/async-wait/s4u-async-wait.cpp +++ b/examples/s4u/async-wait/s4u-async-wait.cpp @@ -1,119 +1,99 @@ -/* Copyright (c) 2010-2017. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2010-2019. 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. */ -/* This example shows how to block until the completion of a communication. +/* 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 +#include "simgrid/s4u.hpp" +#include +#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; /* - number of tasks */ - long receivers_count; /* - number of receivers */ - double sleep_start_time; /* - start time */ - double sleep_test_time; /* - test time */ - double msg_size; /* - computational cost */ - double task_comm_size; /* - communication cost */ - simgrid::s4u::MailboxPtr mbox; - -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]); - msg_size = std::stod(args[2]); - task_comm_size = std::stod(args[3]); - receivers_count = std::stol(args[4]); - double sleep_start_time = std::stod(args[5]); - double sleep_test_time = std::stod(args[6]); - XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time); -} -void operator()() +static int sender(int argc, char** argv) { + xbt_assert(argc == 4, "Expecting 3 parameters from the XML deployment file but got %d", argc); + long messages_count = std::stol(argv[1]); /* - number of tasks */ + double msg_size = std::stol(argv[2]); /* - communication cost in bytes */ + long receivers_count = std::stod(argv[3]); /* - number of receivers */ + + /* Vector in which we store all ongoing communications */ + std::vector pending_comms; + + /* Make a vector of the mailboxes to use */ + std::vector mboxes; + for (int i = 0; i < receivers_count; i++) + mboxes.push_back(simgrid::s4u::Mailbox::by_name(std::string("receiver-") + std::to_string(i))); + /* Start dispatching all messages to receivers, in a round robin fashion */ 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 representing the ongoing communication */ - simgrid::s4u::CommPtr comm = mbox->put_async((void*)mailbox, msg_size); - XBT_INFO("Send to receiver-%ld Task_%d", i % receivers_count, i); - comm->wait(task_comm_size); + std::string msg_content = std::string("Message ") + std::to_string(i); + // Copy the data we send: 'msg_content' is not a stable storage location. + // It will be destroyed when this actor leaves the loop, ie before the receiver gets it + std::string* payload = new std::string(msg_content); + + XBT_INFO("Send '%s' to '%s'", msg_content.c_str(), mboxes[i % receivers_count]->get_cname()); + + /* Create a communication representing the ongoing communication, and store it in pending_comms */ + simgrid::s4u::CommPtr comm = mboxes[i % receivers_count]->put_async(payload, msg_size); + 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++) { - char mailbox[80]; - char* payload = xbt_strdup("finalize"); - snprintf(mailbox, 79, "receiver-%d", i); - simgrid::s4u::CommPtr comm = mbox->put_async((void*)payload, 0); - comm->wait(task_comm_size); - XBT_INFO("Send to receiver-%d finalize", i); + XBT_INFO("Send 'finalize' to 'receiver-%d'", i); + simgrid::s4u::CommPtr comm = mboxes[i]->put_async(new std::string("finalize"), 0); + pending_comms.push_back(comm); } + XBT_INFO("Done dispatching all messages"); - XBT_INFO("Goodbye now!"); + /* 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(); + pending_comms.pop_back(); // remove it from the list + } -} -}; - -/* Receiver process expects 3 arguments: */ -class receiver { - int id; /* - unique id */ - double sleep_start_time; /* - start time */ - double sleep_test_time; /* - test time */ - simgrid::s4u::MailboxPtr mbox; - -public: - 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]); - sleep_start_time = std::stod(args[2]); - sleep_test_time = std::stod(args[3]); - 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_INFO("Goodbye now!"); + return 0; } -void operator()() +/* Receiver actor expects 1 argument: its ID */ +static int receiver(int argc, char** argv) { - 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 */ - xbt_free(received); - break; - } + xbt_assert(argc == 2, "Expecting one parameter from the XML deployment file but got %d", argc); + simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::by_name(std::string("receiver-") + argv[1]); + + XBT_INFO("Wait for my first message"); + for (bool cont = true; cont;) { + std::string* received = static_cast(mbox->get()); + XBT_INFO("I got a '%s'.", received->c_str()); + if (*received == "finalize") + cont = false; // If it's a finalize message, we're done. + delete received; } + return 0; } -}; 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.register_function("sender", &sender); + e.register_function("receiver", &receiver); + + e.load_platform(argv[1]); + e.load_deployment(argv[2]); + e.run(); + + return 0; }