1 /* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/msg.h"
8 #include <stdio.h> /* snprintf */
10 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_app_pingpong, "Messages specific for this msg example");
12 static int pinger(int argc, char* argv[])
14 xbt_assert(argc == 2, "The pinger function one argument from the XML deployment file");
15 XBT_INFO("Ping -> %s", argv[1]);
16 xbt_assert(MSG_host_by_name(argv[1]) != NULL, "Unknown host %s. Stopping Now! ", argv[1]);
18 /* - Do the ping with a 1-Byte task (latency bound) ... */
19 double now = MSG_get_clock();
20 msg_task_t ping_task = MSG_task_create("small communication (latency bound)", 0.0, 1, NULL);
21 ping_task->data = xbt_new(double, 1);
22 *(double*)ping_task->data = now;
23 MSG_task_send(ping_task, argv[1]);
25 /* - ... then wait for the (large) pong */
26 msg_task_t pong_task = NULL;
27 int a = MSG_task_receive(&pong_task, MSG_host_get_name(MSG_host_self()));
28 xbt_assert(a == MSG_OK, "Unexpected behavior");
30 double sender_time = *((double*)(pong_task->data));
31 double communication_time = MSG_get_clock() - sender_time;
32 XBT_INFO("Task received : %s", pong_task->name);
33 xbt_free(pong_task->data);
34 MSG_task_destroy(pong_task);
35 XBT_INFO("Pong time (bandwidth bound): %.3f", communication_time);
40 static int ponger(int argc, char* argv[])
42 xbt_assert(argc == 2, "The ponger function one argument from the XML deployment file");
43 XBT_INFO("Pong -> %s", argv[1]);
44 xbt_assert(MSG_host_by_name(argv[1]) != NULL, "Unknown host %s. Stopping Now! ", argv[1]);
46 /* - Receive the (small) ping first ....*/
47 msg_task_t ping_task = NULL;
48 int a = MSG_task_receive(&ping_task, MSG_host_get_name(MSG_host_self()));
49 xbt_assert(a == MSG_OK, "Unexpected behavior");
51 double sender_time = *((double*)(ping_task->data));
52 double communication_time = MSG_get_clock() - sender_time;
53 XBT_INFO("Task received : %s", ping_task->name);
54 xbt_free(ping_task->data);
55 MSG_task_destroy(ping_task);
56 XBT_INFO(" Ping time (latency bound) %f", communication_time);
58 /* - ... Then send a 1GB pong back (bandwidth bound) */
59 double now = MSG_get_clock();
60 msg_task_t pong_task = MSG_task_create("large communication (bandwidth bound)", 0.0, 1e9, NULL);
61 pong_task->data = xbt_new(double, 1);
62 *(double*)pong_task->data = now;
63 XBT_INFO("task_bw->data = %.3f", *((double*)pong_task->data));
64 MSG_task_send(pong_task, argv[1]);
69 int main(int argc, char* argv[])
71 MSG_init(&argc, argv);
73 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
74 "\tExample: %s ../../platforms/small_platform.xml app-pingpong_d.xml\n",
77 MSG_create_environment(argv[1]); /* - Load the platform description */
79 MSG_function_register("pinger", pinger); /* - Register the functions to be executed by the processes */
80 MSG_function_register("ponger", ponger);
82 MSG_launch_application(argv[2]); /* - Deploy the application */
84 msg_error_t res = MSG_main(); /* - Run the simulation */
86 XBT_INFO("Total simulation time: %.3f", MSG_get_clock());