-/* Copyright (c) 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2006-2010, 2012-2015. 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 <stdio.h>
-#include <stdlib.h>
-#include "simdag/simdag.h"
-#include "xbt/ex.h"
-#include "xbt/log.h"
+#include "simgrid/simdag.h"
-XBT_LOG_NEW_DEFAULT_CATEGORY(sd_comm_throttling,
- "Logging specific to this SimDag example");
+XBT_LOG_NEW_DEFAULT_CATEGORY(sd_comm_throttling, "Logging specific to this SimDag example");
int main(int argc, char **argv)
{
unsigned int ctr;
- const char *platform_file;
- const SD_workstation_t *workstations;
- SD_task_t task, taskA, taskB, taskC, taskD, taskE;
+ SD_task_t task;
xbt_dynar_t changed_tasks;
- /* initialization of SD */
SD_init(&argc, argv);
+ xbt_assert(argc > 1, "Usage: %s platform_file\n\nExample: %s two_clusters.xml", argv[0], argv[0]);
- /* xbt_log_control_set("sd.thres=debug"); */
+ SD_create_environment(argv[1]);
- if (argc < 2) {
- XBT_INFO("Usage: %s platform_file", argv[0]);
- XBT_INFO("example: %s sd_platform.xml", argv[0]);
- exit(1);
- }
-
- /* creation of the environment */
- platform_file = argv[1];
- SD_create_environment(platform_file);
-
- workstations = SD_workstation_get_list();
+ const sg_host_t *hosts = sg_host_list();
/* creation of some typed tasks and their dependencies */
- /* chain of five tasks, three compute tasks with two data transfers */
- /* in between */
- taskA = SD_task_create_comp_seq("Task A", NULL, 5e9);
- taskB = SD_task_create_comm_e2e("Task B", NULL, 1e7);
- taskC = SD_task_create_comp_seq("Task C", NULL, 5e9);
- taskD = SD_task_create_comm_e2e("Task D", NULL, 1e7);
- taskE = SD_task_create_comp_seq("Task E", NULL, 5e9);
+ /* chain of five tasks, three compute tasks with two data transfers in between */
+ SD_task_t taskA = SD_task_create_comp_seq("Task A", NULL, 5e9);
+ SD_task_t taskB = SD_task_create_comm_e2e("Task B", NULL, 1e7);
+ SD_task_t taskC = SD_task_create_comp_seq("Task C", NULL, 5e9);
+ SD_task_t taskD = SD_task_create_comm_e2e("Task D", NULL, 1e7);
+ SD_task_t taskE = SD_task_create_comp_seq("Task E", NULL, 5e9);
SD_task_dependency_add(NULL, NULL, taskA, taskB);
SD_task_dependency_add(NULL, NULL, taskB, taskC);
/* Auto-schedule the compute tasks on three different workstations */
/* Data transfer tasks taskB and taskD are automagically scheduled */
- SD_task_schedulel(taskA, 1, workstations[0]);
- SD_task_schedulel(taskC, 1, workstations[1]);
- SD_task_schedulel(taskE, 1, workstations[0]);
+ SD_task_schedulel(taskA, 1, hosts[0]);
+ SD_task_schedulel(taskC, 1, hosts[1]);
+ SD_task_schedulel(taskE, 1, hosts[0]);
while (!xbt_dynar_is_empty((changed_tasks = SD_simulate(-1.0)))) {
XBT_INFO("Simulation stopped after %.4f seconds", SD_get_clock());
xbt_dynar_foreach(changed_tasks, ctr, task) {
- XBT_INFO("Task '%s' start time: %f, finish time: %f",
- SD_task_get_name(task),
- SD_task_get_start_time(task),
- SD_task_get_finish_time(task));
-
+ XBT_INFO("Task '%s' start time: %f, finish time: %f", SD_task_get_name(task), SD_task_get_start_time(task),
+ SD_task_get_finish_time(task));
}
+
/* let throttle the communication for taskD if its parent is SD_DONE */
- if (SD_task_get_state(taskC) == SD_DONE)
- SD_task_set_rate(taskD, 0.5);
+ /* the bandwidth is 1.25e8, the data size is 1e7, and we want to throttle the bandwidth by a factor 2.
+ * The rate is then 1.25e8/(2*1e7)=6.25
+ * Changing the rate is possible before the task execution starts (in SD_RUNNING state).
+ */
+ if (SD_task_get_state(taskC) == SD_DONE && SD_task_get_state(taskD) < SD_RUNNING)
+ SD_task_set_rate(taskD, 6.25);
}
XBT_DEBUG("Destroying tasks...");
-
SD_task_destroy(taskA);
SD_task_destroy(taskB);
SD_task_destroy(taskC);
SD_task_destroy(taskE);
XBT_DEBUG("Tasks destroyed. Exiting SimDag...");
-
SD_exit();
return 0;
}