X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e4fad1fad880c7fc0aebe999e0a2d627d9e42949..43307e6167f4be7aa7016e16df4e55f6f1973188:/src/simdag/sd_global.c

diff --git a/src/simdag/sd_global.c b/src/simdag/sd_global.c
index 332e26cfc2..f97eec443f 100644
--- a/src/simdag/sd_global.c
+++ b/src/simdag/sd_global.c
@@ -1,44 +1,355 @@
-#include "simdag/simdag.h"
+/* Copyright (c) 2007-2009 Da 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 "private.h"
-#include "xbt/asserts.h"
 #include "xbt/sysdep.h"
+#include "xbt/dynar.h"
 #include "surf/surf.h"
+#include "xbt/ex.h"
+#include "xbt/log.h"
+#include "xbt/str.h"
+#include "xbt/config.h"
+
+XBT_LOG_NEW_CATEGORY(sd, "Logging specific to SimDag");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel, sd,
+                                "Logging specific to SimDag (kernel)");
+
+SD_global_t sd_global = NULL;
 
-static int init_done = 0;
+XBT_LOG_EXTERNAL_CATEGORY(sd_kernel);
+XBT_LOG_EXTERNAL_CATEGORY(sd_task);
+XBT_LOG_EXTERNAL_CATEGORY(sd_workstation);
 
-/* Initialises SG internal data. This function should be called before any other SG function.
+/**
+ * \brief Initialises SD internal data
+ *
+ * This function must be called before any other SD function. Then you
+ * should call SD_create_environment().
+ *
+ * \param argc argument number
+ * \param argv argument list
+ * \see SD_create_environment(), SD_exit()
  */
-void SG_init(int *argc, char **argv) {
-  xbt_assert0(!init_done, "SG_init already called");
+void SD_init(int *argc, char **argv)
+{
+
+  s_SD_task_t task;
+
+  xbt_assert0(!SD_INITIALISED(), "SD_init() already called");
 
-  sg_global = xbt_new0(s_SG_global_t, 1);
-  sg_global->workstations = xbt_dict_new();
-  sg_global->workstation_count = 0;
+  /* Connect our log channels: that must be done manually under windows */
+  XBT_LOG_CONNECT(sd_kernel, sd);
+  XBT_LOG_CONNECT(sd_task, sd);
+  XBT_LOG_CONNECT(sd_workstation, sd);
+
+
+  sd_global = xbt_new(s_SD_global_t, 1);
+  sd_global->workstations = xbt_dict_new();
+  sd_global->workstation_count = 0;
+  sd_global->workstation_list = NULL;
+  sd_global->links = xbt_dict_new();
+  sd_global->link_count = 0;
+  sd_global->link_list = NULL;
+  sd_global->recyclable_route = NULL;
+  sd_global->watch_point_reached = 0;
+
+  sd_global->not_scheduled_task_set =
+    xbt_swag_new(xbt_swag_offset(task, state_hookup));
+  sd_global->scheduled_task_set =
+    xbt_swag_new(xbt_swag_offset(task, state_hookup));
+  sd_global->ready_task_set =
+    xbt_swag_new(xbt_swag_offset(task, state_hookup));
+  sd_global->in_fifo_task_set =
+    xbt_swag_new(xbt_swag_offset(task, state_hookup));
+  sd_global->running_task_set =
+    xbt_swag_new(xbt_swag_offset(task, state_hookup));
+  sd_global->done_task_set =
+    xbt_swag_new(xbt_swag_offset(task, state_hookup));
+  sd_global->failed_task_set =
+    xbt_swag_new(xbt_swag_offset(task, state_hookup));
+  sd_global->task_number = 0;
 
   surf_init(argc, argv);
+  xbt_cfg_set_string(_surf_cfg_set, "workstation_model", "ptask_L07");
+}
+
+/**
+ * \brief Reinits the application part of the simulation (experimental feature)
+ *
+ * This function allows you to run several simulations on the same platform
+ * by resetting the part describing the application.
+ *
+ * @warning: this function is still experimental and not perfect. For example,
+ * the simulation clock (and traces usage) is not reset. So, do not use it if
+ * you use traces in your simulation, and do not use absolute timing after using it.
+ * That being said, this function is still precious if you want to compare a bunch of
+ * heuristics on the same platforms.
+ */
+void SD_application_reinit(void)
+{
+
+  s_SD_task_t task;
+
+  if (SD_INITIALISED()) {
+    DEBUG0("Recreating the swags...");
+    xbt_swag_free(sd_global->not_scheduled_task_set);
+    xbt_swag_free(sd_global->scheduled_task_set);
+    xbt_swag_free(sd_global->ready_task_set);
+    xbt_swag_free(sd_global->in_fifo_task_set);
+    xbt_swag_free(sd_global->running_task_set);
+    xbt_swag_free(sd_global->done_task_set);
+    xbt_swag_free(sd_global->failed_task_set);
+
+    sd_global->not_scheduled_task_set =
+      xbt_swag_new(xbt_swag_offset(task, state_hookup));
+    sd_global->scheduled_task_set =
+      xbt_swag_new(xbt_swag_offset(task, state_hookup));
+    sd_global->ready_task_set =
+      xbt_swag_new(xbt_swag_offset(task, state_hookup));
+    sd_global->in_fifo_task_set =
+      xbt_swag_new(xbt_swag_offset(task, state_hookup));
+    sd_global->running_task_set =
+      xbt_swag_new(xbt_swag_offset(task, state_hookup));
+    sd_global->done_task_set =
+      xbt_swag_new(xbt_swag_offset(task, state_hookup));
+    sd_global->failed_task_set =
+      xbt_swag_new(xbt_swag_offset(task, state_hookup));
+    sd_global->task_number = 0;
+  } else {
+    WARN0("SD_application_reinit called before initialization of SimDag");
+    /* we cannot use exceptions here because xbt is not running! */
+  }
 
-  init_done = 1;
 }
 
-/* Checks that SG_init has been called.
+/**
+ * \brief Creates the environment
+ *
+ * The environment (i.e. the \ref SD_workstation_management "workstations" and the
+ * \ref SD_link_management "links") is created with the data stored in the given XML
+ * platform file.
+ *
+ * \param platform_file name of an XML file describing the environment to create
+ * \see SD_workstation_management, SD_link_management
+ *
+ * The XML file follows this DTD:
+ *
+ *     \include simgrid.dtd
+ *
+ * Here is a small example of such a platform:
+ *
+ *     \include small_platform.xml
  */
-void check_init_done() {
-  xbt_assert0(init_done, "SG_init not called yet");
+void SD_create_environment(const char *platform_file)
+{
+  xbt_dict_cursor_t cursor = NULL;
+  char *name = NULL;
+  void *surf_workstation = NULL;
+  void *surf_link = NULL;
+
+  SD_CHECK_INIT_DONE();
+
+  DEBUG0("SD_create_environment");
+
+  surf_config_models_setup(platform_file);
+
+  parse_platform_file(platform_file);
+
+  /* now let's create the SD wrappers for workstations and links */
+  xbt_dict_foreach(surf_model_resource_set(surf_workstation_model), cursor,
+                   name, surf_workstation) {
+    __SD_workstation_create(surf_workstation, NULL);
+  }
+
+  xbt_dict_foreach(surf_model_resource_set(surf_network_model), cursor, name, surf_link) {
+    __SD_link_create(surf_link, NULL);
+  }
+
+  DEBUG2("Workstation number: %d, link number: %d",
+         SD_workstation_get_number(), SD_link_get_number());
 }
 
-/* Creates the environnement described in a xml file of a platform descriptions.
+/**
+ * \brief Launches the simulation.
+ *
+ * The function will execute the \ref SD_READY ready tasks.
+ * The simulation will be stopped when its time reaches \a how_long,
+ * when a watch point is reached, or when no more task can be executed.
+ * Then you can call SD_simulate() again.
+ *
+ * \param how_long maximum duration of the simulation (a negative value means no time limit)
+ * \return a NULL-terminated array of \ref SD_task_t whose state has changed.
+ * \see SD_task_schedule(), SD_task_watch()
  */
-void SG_create_environnement(const char *platform_file) {
-  check_init_done();
-  surf_timer_resource_init(platform_file);
-  surf_workstation_resource_init_KCCFLN05(platform_file); /* tell Surf to create the environnement */
+SD_task_t *SD_simulate(double how_long)
+{
+  double total_time = 0.0;      /* we stop the simulation when total_time >= how_long */
+  double elapsed_time = 0.0;
+  SD_task_t task, task_safe, dst;
+  SD_dependency_t dependency;
+  surf_action_t action;
+  SD_task_t *res = NULL;
+  xbt_dynar_t changed_tasks = xbt_dynar_new(sizeof(SD_task_t), NULL);
+  unsigned int iter;
+  static int first_time = 1;
+
+  SD_CHECK_INIT_DONE();
+
+  INFO0("Starting simulation...");
+
+  if (first_time) {
+    surf_presolve();            /* Takes traces into account */
+    first_time = 0;
+  }
+
+  if (how_long > 0) {
+    surf_timer_model->extension.timer.set(surf_get_clock() + how_long,
+                                          NULL, NULL);
+  }
+  sd_global->watch_point_reached = 0;
+
+  /* explore the ready tasks */
+  xbt_swag_foreach_safe(task, task_safe, sd_global->ready_task_set) {
+    INFO1("Executing task '%s'", SD_task_get_name(task));
+    if (__SD_task_try_to_run(task) && !xbt_dynar_member(changed_tasks, &task))
+      xbt_dynar_push(changed_tasks, &task);
+  }
+
+  /* main loop */
+  elapsed_time = 0.0;
+  while (elapsed_time >= 0.0 &&
+         (how_long < 0.0 || total_time < how_long) &&
+         !sd_global->watch_point_reached) {
+    surf_model_t model = NULL;
+    /* dumb variables */
+    void *fun = NULL;
+    void *arg = NULL;
+
+
+    DEBUG1("Total time: %f", total_time);
+
+    elapsed_time = surf_solve();
+    DEBUG1("surf_solve() returns %f", elapsed_time);
+    if (elapsed_time > 0.0)
+      total_time += elapsed_time;
+
+    /* let's see which tasks are done */
+    xbt_dynar_foreach(model_list, iter, model) {
+      while ((action = xbt_swag_extract(model->states.done_action_set))) {
+        task = action->data;
+        INFO1("Task '%s' done", SD_task_get_name(task));
+        DEBUG0("Calling __SD_task_just_done");
+        __SD_task_just_done(task);
+        DEBUG1("__SD_task_just_done called on task '%s'",
+               SD_task_get_name(task));
+
+        /* the state has changed */
+        if (!xbt_dynar_member(changed_tasks, &task))
+          xbt_dynar_push(changed_tasks, &task);
+
+        /* remove the dependencies after this task */
+        while (xbt_dynar_length(task->tasks_after) > 0) {
+          xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
+          dst = dependency->dst;
+          SD_task_dependency_remove(task, dst);
+
+          /* is dst ready now? */
+          if (__SD_task_is_ready(dst) && !sd_global->watch_point_reached) {
+            INFO1("Executing task '%s'", SD_task_get_name(dst));
+            if (__SD_task_try_to_run(dst) &&
+                !xbt_dynar_member(changed_tasks, &task))
+              xbt_dynar_push(changed_tasks, &task);
+          }
+        }
+      }
+
+      /* let's see which tasks have just failed */
+      while ((action = xbt_swag_extract(model->states.failed_action_set))) {
+        task = action->data;
+        INFO1("Task '%s' failed", SD_task_get_name(task));
+        __SD_task_set_state(task, SD_FAILED);
+        surf_workstation_model->action_unref(action);
+        task->surf_action = NULL;
+
+        if (!xbt_dynar_member(changed_tasks, &task))
+          xbt_dynar_push(changed_tasks, &task);
+      }
+    }
+
+    while (surf_timer_model->extension.timer.get(&fun, (void *) &arg)) {
+    }
+  }
+
+  res = xbt_new0(SD_task_t, (xbt_dynar_length(changed_tasks) + 1));
+
+  xbt_dynar_foreach(changed_tasks, iter, task) {
+    res[iter] = task;
+  }
+  xbt_dynar_free(&changed_tasks);
+
+  INFO0("Simulation finished");
+  DEBUG3("elapsed_time = %f, total_time = %f, watch_point_reached = %d",
+         elapsed_time, total_time, sd_global->watch_point_reached);
+  DEBUG1("current time = %f", surf_get_clock());
+
+  return res;
 }
 
+/**
+ * \brief Returns the current clock
+ *
+ * \return the current clock, in second
+ */
+double SD_get_clock(void)
+{
+  SD_CHECK_INIT_DONE();
+
+  return surf_get_clock();
+}
 
-/* Launches the simulation. Returns a NULL-terminated array of SG_task_t whose state has changed.
+/**
+ * \brief Destroys all SD internal data
+ *
+ * This function should be called when the simulation is over. Don't forget also to destroy
+ * the tasks.
+ *
+ * \see SD_init(), SD_task_destroy()
  */
-SG_task_t* SG_simulate(double how_long)
+void SD_exit(void)
 {
-  /* TODO */
-  return NULL;
+  if (SD_INITIALISED()) {
+    DEBUG0("Destroying workstation and link dictionaries...");
+    xbt_dict_free(&sd_global->workstations);
+    xbt_dict_free(&sd_global->links);
+
+    DEBUG0("Destroying workstation and link arrays if necessary...");
+    if (sd_global->workstation_list != NULL)
+      xbt_free(sd_global->workstation_list);
+
+    if (sd_global->link_list != NULL)
+      xbt_free(sd_global->link_list);
+
+    if (sd_global->recyclable_route != NULL)
+      xbt_free(sd_global->recyclable_route);
+
+    DEBUG0("Destroying the swags...");
+    xbt_swag_free(sd_global->not_scheduled_task_set);
+    xbt_swag_free(sd_global->scheduled_task_set);
+    xbt_swag_free(sd_global->ready_task_set);
+    xbt_swag_free(sd_global->in_fifo_task_set);
+    xbt_swag_free(sd_global->running_task_set);
+    xbt_swag_free(sd_global->done_task_set);
+    xbt_swag_free(sd_global->failed_task_set);
+
+    xbt_free(sd_global);
+    sd_global = NULL;
+
+    DEBUG0("Exiting Surf...");
+    surf_exit();
+  } else {
+    WARN0("SD_exit() called, but SimDag is not running");
+    /* we cannot use exceptions here because xbt is not running! */
+  }
 }