1 /* Copyright (c) 2006, 2007, 2008, 2009, 2010. 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. */
9 #include "simdag/simdag.h"
13 XBT_LOG_NEW_DEFAULT_CATEGORY(sd_comm_throttling,
14 "Logging specific to this SimDag example");
16 int main(int argc, char **argv)
19 const char *platform_file;
20 const SD_workstation_t *workstations;
21 SD_task_t task, taskA, taskB, taskC, taskD, taskE;
22 xbt_dynar_t changed_tasks;
24 /* initialization of SD */
27 /* xbt_log_control_set("sd.thres=debug"); */
30 XBT_INFO("Usage: %s platform_file", argv[0]);
31 XBT_INFO("example: %s sd_platform.xml", argv[0]);
35 /* creation of the environment */
36 platform_file = argv[1];
37 SD_create_environment(platform_file);
39 workstations = SD_workstation_get_list();
41 /* creation of some typed tasks and their dependencies */
42 /* chain of five tasks, three compute tasks with two data transfers */
44 taskA = SD_task_create_comp_seq("Task A", NULL, 5e9);
45 taskB = SD_task_create_comm_e2e("Task B", NULL, 1e7);
46 taskC = SD_task_create_comp_seq("Task C", NULL, 5e9);
47 taskD = SD_task_create_comm_e2e("Task D", NULL, 1e7);
48 taskE = SD_task_create_comp_seq("Task E", NULL, 5e9);
50 SD_task_dependency_add(NULL, NULL, taskA, taskB);
51 SD_task_dependency_add(NULL, NULL, taskB, taskC);
52 SD_task_dependency_add(NULL, NULL, taskC, taskD);
53 SD_task_dependency_add(NULL, NULL, taskD, taskE);
55 /* Add watchpoints on completion of compute tasks */
56 SD_task_watch(taskA, SD_DONE);
57 SD_task_watch(taskC, SD_DONE);
58 SD_task_watch(taskE, SD_DONE);
60 /* Auto-schedule the compute tasks on three different workstations */
61 /* Data transfer tasks taskB and taskD are automagically scheduled */
62 SD_task_schedulel(taskA, 1, workstations[0]);
63 SD_task_schedulel(taskC, 1, workstations[1]);
64 SD_task_schedulel(taskE, 1, workstations[0]);
65 while (!xbt_dynar_is_empty((changed_tasks = SD_simulate(-1.0)))) {
66 XBT_INFO("Simulation stopped after %.4f seconds", SD_get_clock());
67 xbt_dynar_foreach(changed_tasks, ctr, task) {
68 XBT_INFO("Task '%s' start time: %f, finish time: %f",
69 SD_task_get_name(task),
70 SD_task_get_start_time(task),
71 SD_task_get_finish_time(task));
74 /* let throttle the communication for taskD if its parent is SD_DONE */
75 /* the bandwidth is 1.25e8, the data size is 1e7, and we want to throttle
76 * the bandwidth by a factor 2. the rate is then 1.25e8/(2*1e7)=6.25
78 if (SD_task_get_state(taskC) == SD_DONE)
79 SD_task_set_rate(taskD, 6.25);
82 XBT_DEBUG("Destroying tasks...");
84 SD_task_destroy(taskA);
85 SD_task_destroy(taskB);
86 SD_task_destroy(taskC);
87 SD_task_destroy(taskD);
88 SD_task_destroy(taskE);
90 XBT_DEBUG("Tasks destroyed. Exiting SimDag...");