1 /* Copyright (c) 2007-2018. 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(basic0, sd, "SimDag test basic0");
12 /* Basic SimDag Test 0
14 * - Create a no-op Init task
15 * - Create two communication tasks: 100MB and 1B
16 * - Schedule them concurrently on the two hosts of the platform
17 * The two communications occur simultaneously but one is so short that it has no impact on the other.
18 * Simulated time should be:
19 * 1e8/1.25e8 + 1e-4 = 0.8001 seconds
20 * This corresponds to paying latency once and having the full bandwidth for the big message.
22 int main(int argc, char **argv)
24 /* scheduling parameters */
25 double communication_amount1[] = { 0, 1e8, 0, 0 };
26 double communication_amount2[] = { 0, 1, 0, 0 };
27 const double no_cost[] = { 0.0, 0.0 };
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 1", NULL, 1.0);
38 SD_task_t taskB = SD_task_create("Task Comm 2", NULL, 1.0);
40 SD_task_dependency_add(taskInit, taskA);
41 SD_task_dependency_add(taskInit, taskB);
43 sg_host_t *hosts = sg_host_list();
44 SD_task_schedule(taskInit, 1, hosts, no_cost, no_cost, -1.0);
45 SD_task_schedule(taskA, 2, hosts, no_cost, communication_amount1, -1.0);
46 SD_task_schedule(taskB, 2, hosts, no_cost, communication_amount2, -1.0);
49 /* let's launch the simulation! */
51 SD_task_destroy(taskInit);
52 SD_task_destroy(taskA);
53 SD_task_destroy(taskB);
55 XBT_INFO("Simulation time: %f", SD_get_clock());