one cmake file less

[simgrid.git] / examples / simdag / throttling / sd_throttling.c

diff --git a/examples/simdag/throttling/sd_throttling.c b/examples/simdag/throttling/sd_throttling.c
new file mode 100644 (file)
index 0000000..fef44bc
--- /dev/null
+++ b/examples/simdag/throttling/sd_throttling.c
@@ -0,0 +1,73 @@
+/* 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 "simgrid/simdag.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(sd_comm_throttling, "Logging specific to this SimDag example");
+
+int main(int argc, char **argv)
+{
+  unsigned int ctr;
+  SD_task_t task;
+  xbt_dynar_t changed_tasks;
+
+  SD_init(&argc, argv);
+  xbt_assert(argc > 1, "Usage: %s platform_file\n\nExample: %s two_clusters.xml", argv[0], argv[0]);
+
+  SD_create_environment(argv[1]);
+
+  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 */
+  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);
+  SD_task_dependency_add(NULL, NULL, taskC, taskD);
+  SD_task_dependency_add(NULL, NULL, taskD, taskE);
+
+  /* Add watchpoints on completion of compute tasks */
+  SD_task_watch(taskA, SD_DONE);
+  SD_task_watch(taskC, SD_DONE);
+  SD_task_watch(taskE, SD_DONE);
+
+  /* Auto-schedule the compute tasks on three different workstations */
+  /* Data transfer tasks taskB and taskD are automagically scheduled */
+  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));
+    }
+
+    /* let throttle the communication for taskD if its parent is SD_DONE */
+    /* 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(taskD);
+  SD_task_destroy(taskE);
+
+  XBT_DEBUG("Tasks destroyed. Exiting SimDag...");
+  SD_exit();
+  return 0;
+}