X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7e2d0f730f1bdbc0b207f6ac26c0b5ff4f0765fa..4fcf82473390a73a49a33a119ac10ae97cfea44b:/examples/s4u/app-masterworkers/s4u-app-masterworkers-fun.cpp

diff --git a/examples/s4u/app-masterworkers/s4u-app-masterworkers-fun.cpp b/examples/s4u/app-masterworkers/s4u-app-masterworkers-fun.cpp
new file mode 100644
index 0000000000..b0ff1ddc92
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+++ b/examples/s4u/app-masterworkers/s4u-app-masterworkers-fun.cpp
@@ -0,0 +1,84 @@
+/* Copyright (c) 2010-2018. 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 "xbt/sysdep.h"
+#include <simgrid/s4u.hpp>
+#include <string>
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_app_masterworker, "Messages specific for this s4u example");
+
+static void master(std::vector<std::string> args)
+{
+  xbt_assert(args.size() == 5, "The master function expects 4 arguments from the XML deployment file");
+
+  long number_of_tasks = std::stol(args[1]);
+  double comp_size     = std::stod(args[2]); /* - Task compute cost    */
+  double comm_size     = std::stod(args[3]); /* - Task communication size */
+  long workers_count   = std::stol(args[4]);
+
+  XBT_INFO("Got %ld workers and %ld tasks to process", workers_count, number_of_tasks);
+
+  simgrid::s4u::MailboxPtr mailbox = nullptr;
+
+  for (int i = 0; i < number_of_tasks; i++) { /* For each task to be executed: */
+    /* - Select a @ref worker in a round-robin way */
+    mailbox = simgrid::s4u::Mailbox::by_name(std::string("worker-") + std::to_string(i % workers_count));
+
+    if (number_of_tasks < 10000 || (number_of_tasks < 100000 && i % 10000 == 0) || i % 100000 == 0)
+      XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", (std::string("Task_") + std::to_string(i)).c_str(),
+               number_of_tasks, mailbox->get_cname());
+
+    /* - Send the computation amount to the @ref worker */
+    mailbox->put(new double(comp_size), comm_size);
+  }
+
+  XBT_INFO("All tasks have been dispatched. Let's tell everybody the computation is over.");
+  for (int i = 0; i < workers_count; i++) {
+    /* - Eventually tell all the workers to stop by sending a "finalize" task */
+    mailbox = simgrid::s4u::Mailbox::by_name(std::string("worker-") + std::to_string(i % workers_count));
+    mailbox->put(new double(-1.0), 0);
+  }
+}
+
+static void worker(std::vector<std::string> args)
+{
+  xbt_assert(args.size() == 2, "The worker expects a single argument from the XML deployment file: "
+                               "its worker ID (its numerical rank)");
+  long id                          = std::stol(args[1]);
+  simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(std::string("worker-") + std::to_string(id));
+
+  while (1) { /* The worker waits in an infinite loop for tasks sent by the @ref master */
+    double* task = static_cast<double*>(mailbox->get());
+    xbt_assert(task != nullptr, "mailbox->get() failed");
+    double comp_size = *task;
+    delete task;
+    if (comp_size < 0) { /* - Exit when -1.0 is received */
+      XBT_INFO("I'm done. See you!");
+      break;
+    }
+    /*  - Otherwise, process the task */
+    simgrid::s4u::this_actor::execute(comp_size);
+  }
+}
+
+int main(int argc, char* argv[])
+{
+  simgrid::s4u::Engine e(&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]);
+
+  e.load_platform(argv[1]); /* Load the platform description */
+  e.register_function("master", &master);
+  e.register_function("worker", &worker);
+  e.load_deployment(argv[2]); /* Deploy the application */
+
+  e.run(); /** - Run the simulation */
+
+  XBT_INFO("Simulation time %g", e.get_clock());
+
+  return 0;
+}