SimGrid  3.16
Versatile Simulation of Distributed Systems
examples/msg/app-pingpong/app-pingpong.c
/* Copyright (c) 2007-2017. 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"
XBT_LOG_NEW_DEFAULT_CATEGORY(mag_app_pingpong,"Messages specific for this msg example");
static int pinger(int argc, char *argv[])
{
xbt_assert(argc==2, "The pinger function one argument from the XML deployment file");
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 now = 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 = now;
MSG_task_send(ping_task, argv[1]);
/* - ... then wait for the (large) pong */
msg_task_t pong_task = NULL;
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): %.3f", communication_time);
return 0;
}
static int ponger(int argc, char *argv[])
{
xbt_assert(argc==2, "The ponger function one argument from the XML deployment file");
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;
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) %f", communication_time);
/* - ... Then send a 1GB pong back (bandwidth bound) */
double now = 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 = now;
XBT_INFO("task_bw->data = %.3f", *((double*)pong_task->data));
MSG_task_send(pong_task, argv[1]);
return 0;
}
int main(int argc, char *argv[])
{
MSG_init(&argc, argv);
xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
"\tExample: %s ../../platforms/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 functions to be executed by the processes */
MSG_function_register("ponger", ponger);
MSG_launch_application(argv[2]); /* - Deploy the application */
msg_error_t res = MSG_main(); /* - Run the simulation */
XBT_INFO("Total simulation time: %.3f", MSG_get_clock());
return res!=MSG_OK;
}