--- /dev/null
+/* Copyright (c) 2007-2015. 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/msg.h"
+
+/** @addtogroup MSG_examples
+ *
+ * - <b>Ping-pong example: app-pingpong/app-pingpong.c </b>. It's hard to think of a simpler example. The tesh file
+ * laying in the directory is instructive concerning the way to pass options to the simulators (see \ref options).
+ */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(pingpong,"Messages specific for this msg example");
+
+static int pinger(int argc, char *argv[])
+{
+ XBT_INFO("Ping -> %s", argv[1]);
+ xbt_assert(MSG_host_by_name(argv[1]) != NULL, "Unknown host %s. Stopping Now! ", argv[1]);
+
+ /** - Do the ping with a 1-Byte task (latency bound) ... */
+ double time = MSG_get_clock();
+ msg_task_t ping_task = MSG_task_create("small communication (latency bound)", 0.0, 1, NULL);
+ ping_task->data = xbt_new(double, 1);
+ *(double *) ping_task->data = time;
+ MSG_task_send(ping_task, argv[1]);
+
+ /** - ... then wait for the (large) pong */
+ msg_task_t pong_task = NULL;
+ int a = MSG_task_receive(&pong_task,MSG_host_get_name(MSG_host_self()));
+ xbt_assert(a == MSG_OK, "Unexpected behavior");
+
+ double sender_time = *((double *) (pong_task->data));
+ double communication_time = MSG_get_clock() - sender_time;
+ XBT_INFO("Task received : %s", pong_task->name);
+ xbt_free(pong_task->data);
+ MSG_task_destroy(pong_task);
+ XBT_INFO("Pong time (bandwidth bound): %e", communication_time);
+
+ return 0;
+}
+
+static int ponger(int argc, char *argv[])
+{
+ XBT_INFO("Pong -> %s", argv[1]);
+ xbt_assert(MSG_host_by_name(argv[1]) != NULL, "Unknown host %s. Stopping Now! ", argv[1]);
+
+ /** - Receive the (small) ping first ....*/
+ msg_task_t ping_task = NULL;
+ int a = MSG_task_receive(&ping_task, MSG_host_get_name(MSG_host_self()));
+ xbt_assert(a == MSG_OK, "Unexpected behavior");
+
+ double sender_time = *((double *) (ping_task->data));
+ double communication_time = MSG_get_clock() - sender_time;
+ XBT_INFO("Task received : %s", ping_task->name);
+ xbt_free(ping_task->data);
+ MSG_task_destroy(ping_task);
+ XBT_INFO(" Ping time (latency bound) %e", communication_time);
+
+ /** - ... Then send a 1GB pong back (bandwidth bound) */
+ double time = MSG_get_clock();
+ msg_task_t pong_task = MSG_task_create("large communication (bandwidth bound)", 0.0, 1e9, NULL);
+ pong_task->data = xbt_new(double, 1);
+ *(double *) pong_task->data = time;
+ XBT_INFO("task_bw->data = %e", *((double *) pong_task->data));
+ MSG_task_send(pong_task, argv[1]);
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ msg_error_t res = MSG_OK;
+
+ MSG_init(&argc, argv);
+
+ xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
+ "\tExample: %s ../../platform/small_platform.xml app-pingpong_d.xml\n", argv[0], argv[0]);
+
+ MSG_create_environment(argv[1]); /** - Load the platform description */
+
+ MSG_function_register("pinger", pinger); /** - Register the function to be executed by the processes */
+ MSG_function_register("ponger", ponger);
+
+ MSG_launch_application(argv[2]); /** - Deploy the application */
+
+ res = MSG_main(); /** - Run the simulation */
+
+ XBT_INFO("Total simulation time: %e", MSG_get_clock());
+ return res!=MSG_OK;
+}
