1 /* Copyright (c) 2007-2012, 2014-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "simgrid/simdag.h"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(basic2, sd, "SimDag test basic2");
12 /* Basic SimDag Test 2
14 * - Create a no-op Init task
15 * - Create two communication tasks: 1GB and 100MB
16 * - Schedule them concurrently on the two hosts of the platform
17 * The two communications occur simultaneously. They share the network for the duration of the shortest one, then the
18 * longest one has the full bandwidth.
19 * Simulated time should be:
20 * 1e8/(1/2*1.25e8) + 9e8/1.25e8) + 1e-4 = 8.8001 seconds
22 int main(int argc, char **argv)
24 /* scheduling parameters */
25 double communication_amount1 = 1e9;
26 double communication_amount2 = 1e8;
29 /* initialization of SD */
32 /* creation of the environment */
33 SD_create_environment(argv[1]);
35 /* creation of the tasks and their dependencies */
36 SD_task_t taskInit = SD_task_create("Init", NULL, 1.0);
37 SD_task_t taskA = SD_task_create("Task Comm A", NULL, 1.0);
38 SD_task_t taskB = SD_task_create("Task Comm B", NULL, 1.0);
40 SD_task_dependency_add(NULL, NULL, taskInit, taskA);
41 SD_task_dependency_add(NULL, NULL, taskInit, taskB);
43 const sg_host_t *workstation = sg_host_list();
45 SD_task_schedule(taskInit, 1, sg_host_list(), &no_cost, &no_cost, -1.0);
46 SD_task_schedule(taskA, 1, &workstation[0], &no_cost, &communication_amount1, -1.0);
47 SD_task_schedule(taskB, 1, &workstation[1], &no_cost, &communication_amount2, -1.0);
49 /* let's launch the simulation! */
51 SD_task_destroy(taskA);
52 SD_task_destroy(taskB);
53 SD_task_destroy(taskInit);
55 XBT_INFO("Simulation time: %f", SD_get_clock());