[trace] new example inspired by storage systems to trace user variables

[simgrid.git] / examples / msg / tracing / user_variables.c

diff --git a/examples/msg/tracing/user_variables.c b/examples/msg/tracing/user_variables.c
new file mode 100644 (file)
index 0000000..938e690
--- /dev/null
+++ b/examples/msg/tracing/user_variables.c
@@ -0,0 +1,74 @@
+/* Copyright (c) 2010. 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 "msg/msg.h"
+#include "xbt/sysdep.h"         /* calloc, printf */
+
+/* Create a log channel to have nice outputs. */
+#include "xbt/log.h"
+#include "xbt/asserts.h"
+XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
+
+int master(int argc, char *argv[]);
+
+int master(int argc, char *argv[])
+{
+  char *hostname = MSG_host_self()->name;
+  int i;
+
+  //the hostname has an empty HDD with a capacity of 100000 (bytes)
+  TRACE_host_variable_set(hostname, "HDD_capacity", 100000);
+  TRACE_host_variable_set(hostname, "HDD_utilization", 0);
+
+  for (i = 0; i < 10; i++) {
+    //create and execute a task just to make the simulated time advance
+    m_task_t task = MSG_task_create("task", 10000, 0, NULL);
+    MSG_task_execute (task);
+    MSG_task_destroy (task);
+
+    //ADD: after the execution of this task, the HDD utilization increases by 100 (bytes)
+    TRACE_host_variable_add(hostname, "HDD_utilization", 100);
+  }
+
+  for (i = 0; i < 10; i++) {
+    //create and execute a task just to make the simulated time advance
+    m_task_t task = MSG_task_create("task", 10000, 0, NULL);
+    MSG_task_execute (task);
+    MSG_task_destroy (task);
+
+    //SUB: after the execution of this task, the HDD utilization decreases by 100 (bytes)
+    TRACE_host_variable_sub(hostname, "HDD_utilization", 100);
+  }
+  return 0;
+}
+
+/** Main function */
+int main(int argc, char *argv[])
+{
+  MSG_global_init(&argc, argv);
+  if (argc < 3) {
+    printf("Usage: %s platform_file deployment_file\n", argv[0]);
+    exit(1);
+  }
+
+  char *platform_file = argv[1];
+  char *deployment_file = argv[2];
+  MSG_create_environment(platform_file);
+
+  //declaring user variables
+  TRACE_host_variable_declare("HDD_capacity");
+  TRACE_host_variable_declare("HDD_utilization");
+
+  //register functions and launch deployment
+  MSG_function_register("master", master);
+  MSG_function_register("slave", master);
+  MSG_launch_application(deployment_file);
+
+  MSG_main();
+  MSG_clean();
+  return 0;
+}