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Define inline functions in header file (again).
[simgrid.git] / src / simix / smx_global.c
index e876a9a..b82be91 100644 (file)
-/*     $Id$     */
-
-/* Copyright (c) 2007 Arnaud Legrand, Bruno Donnassolo.
-   All rights reserved.                                          */
+/* Copyright (c) 2007-2012. 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 "private.h"
+#include "smx_private.h"
+#include "xbt/heap.h"
 #include "xbt/sysdep.h"
 #include "xbt/log.h"
-#include "xbt/ex.h" /* ex_backtrace_display */
+#include "xbt/str.h"
+#include "xbt/ex.h"             /* ex_backtrace_display */
+#include "mc/mc.h"
+
+XBT_LOG_NEW_CATEGORY(simix, "All SIMIX categories");
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_kernel, simix,
-                               "Logging specific to SIMIX (kernel)");
+                                "Logging specific to SIMIX (kernel)");
 
-//int __stop_at_time = -1.0 ;
+smx_global_t simix_global = NULL;
+static xbt_heap_t simix_timers = NULL;
 
-SIMIX_Global_t simix_global = NULL;
+static void* SIMIX_action_mallocator_new_f(void);
+static void SIMIX_action_mallocator_free_f(void* action);
+static void SIMIX_action_mallocator_reset_f(void* action);
 
-/* static void MarkAsFailed(m_task_t t, TBX_HashTable_t failedProcessList); */
-/* static xbt_fifo_t SIMIX_buildFailedHostList(double a, double b); */
+static void SIMIX_clean(void);
 
-/** \defgroup msg_simulation   SIMIX simulation Functions
- *  \brief This section describes the functions you need to know to
- *  set up a simulation. You should have a look at \ref SIMIX_examples 
- *  to have an overview of their usage.
- *    \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Simulation functions" --> \endhtmlonly
- */
+/* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
+#include <signal.h>
+
+int _surf_do_verbose_exit = 1;
+static void _XBT_CALL inthandler(int ignored)
+{
+  if ( _surf_do_verbose_exit ) {
+     XBT_INFO("CTRL-C pressed. Displaying status and bailing out");
+     SIMIX_display_process_status();
+  }
+  else {
+     XBT_INFO("CTRL-C pressed. bailing out without displaying because verbose-exit is disabled");
+  }
+  exit(1);
+}
 
 /********************************* SIMIX **************************************/
 
-/** \ingroup msg_simulation
- * \brief Initialize some SIMIX internal data.
- */
-void SIMIX_global_init_args(int *argc, char **argv)
+XBT_INLINE double SIMIX_timer_next(void)
 {
-  SIMIX_global_init(argc,argv);
+  return xbt_heap_size(simix_timers) > 0 ? xbt_heap_maxkey(simix_timers) : -1.0;
 }
 
-/** \ingroup msg_simulation
- * \brief Initialize some SIMIX internal data.
+/**
+ * \ingroup SIMIX_API
+ * \brief Initialize SIMIX internal data.
+ *
+ * \param argc Argc
+ * \param argv Argv
  */
 void SIMIX_global_init(int *argc, char **argv)
 {
-       s_smx_process_t proc;
+  s_smx_process_t proc;
 
   if (!simix_global) {
-    surf_init(argc, argv);     /* Initialize some common structures. Warning, it sets msg_global=NULL */
-     
-    simix_global = xbt_new0(s_SIMIX_Global_t,1);
-
-    xbt_context_init();
-    simix_global->host = xbt_fifo_new();
-    simix_global->process_to_run = xbt_swag_new(xbt_swag_offset(proc,process_hookup));
-    simix_global->process_list = xbt_swag_new(xbt_swag_offset(proc,process_hookup));
-    simix_global->current_process = NULL;
-    simix_global->registered_functions = xbt_dict_new();
+    simix_global = xbt_new0(s_smx_global_t, 1);
+
+#ifdef TIME_BENCH_AMDAHL
+    simix_global->timer_seq = xbt_os_timer_new();
+    simix_global->timer_par = xbt_os_timer_new();
+    xbt_os_timer_start(simix_global->timer_seq);
+#endif
+    simix_global->process_to_run = xbt_dynar_new(sizeof(smx_process_t), NULL);
+    simix_global->process_that_ran = xbt_dynar_new(sizeof(smx_process_t), NULL);
+    simix_global->process_list =
+        xbt_swag_new(xbt_swag_offset(proc, process_hookup));
+    simix_global->process_to_destroy =
+        xbt_swag_new(xbt_swag_offset(proc, destroy_hookup));
+
+    simix_global->maestro_process = NULL;
+    simix_global->registered_functions = xbt_dict_new_homogeneous(NULL);
+
+    simix_global->create_process_function = SIMIX_process_create;
+    simix_global->kill_process_function = SIMIX_process_kill;
+    simix_global->cleanup_process_function = SIMIX_process_cleanup;
+    simix_global->action_mallocator = xbt_mallocator_new(65536,
+        SIMIX_action_mallocator_new_f, SIMIX_action_mallocator_free_f,
+        SIMIX_action_mallocator_reset_f);
+    simix_global->autorestart = SIMIX_host_restart_processes;
+
+    surf_init(argc, argv);      /* Initialize SURF structures */
+    SIMIX_context_mod_init();
+    SIMIX_create_maestro_process();
+
+    /* context exception handlers */
+    __xbt_running_ctx_fetch = SIMIX_process_get_running_context;
+    __xbt_ex_terminate = SIMIX_process_exception_terminate;
+
+    SIMIX_network_init();
+
+    /* Prepare to display some more info when dying on Ctrl-C pressing */
+    signal(SIGINT, inthandler);
+
+    /* register a function to be called by SURF after the environment creation */
+    sg_platf_init();
+    sg_platf_postparse_add_cb(SIMIX_post_create_environment);
+
+  }
+  if (!simix_timers) {
+    simix_timers = xbt_heap_new(8, &free);
   }
+
+  SIMIX_HOST_LEVEL = xbt_lib_add_level(host_lib,SIMIX_host_destroy);
+
+  atexit(SIMIX_clean);
 }
 
-void __SIMIX_display_process_status(void)
+/**
+ * \ingroup SIMIX_API
+ * \brief Clean the SIMIX simulation
+ *
+ * This functions remove the memory used by SIMIX
+ */
+static void SIMIX_clean(void)
 {
-   smx_process_t process = NULL;
-   //xbt_fifo_item_t item = NULL;
-   //int i;
-   int nbprocess=xbt_swag_size(simix_global->process_list);
-   
-   INFO1("SIMIX: %d processes are still running, waiting for something.",
-        nbprocess);
-   /*  List the process and their state */
-   INFO0("SIMIX: <process>(<pid>) on <host>: <status>.");
-   xbt_swag_foreach(process, simix_global->process_list) {
-      simdata_process_t p_simdata = (simdata_process_t) process->simdata;
-     // simdata_host_t h_simdata=(simdata_host_t)p_simdata->host->simdata;
-      char *who;
-       
-      asprintf(&who,"SIMIX:  %s on %s: %s",
-              process->name,
-                                p_simdata->host->name,
-              (process->simdata->blocked)?"[blocked] "
-              :((process->simdata->suspended)?"[suspended] ":""));
-      
-      free(who);
-   }
+#ifdef TIME_BENCH_PER_SR
+  smx_ctx_raw_new_sr();
+#endif
+
+  /* Kill everyone (except maestro) */
+  SIMIX_process_killall(simix_global->maestro_process);
+
+  /* Exit the SIMIX network module */
+  SIMIX_network_exit();
+
+  xbt_heap_free(simix_timers);
+  simix_timers = NULL;
+  /* Free the remaining data structures */
+  xbt_dynar_free(&simix_global->process_to_run);
+  xbt_dynar_free(&simix_global->process_that_ran);
+  xbt_swag_free(simix_global->process_to_destroy);
+  xbt_swag_free(simix_global->process_list);
+  simix_global->process_list = NULL;
+  simix_global->process_to_destroy = NULL;
+  xbt_dict_free(&(simix_global->registered_functions));
+
+  /* Let's free maestro now */
+  SIMIX_context_free(simix_global->maestro_process->context);
+  xbt_free(simix_global->maestro_process->running_ctx);
+  xbt_free(simix_global->maestro_process);
+  simix_global->maestro_process = NULL;
+
+  /* Restore the default exception setup */
+  __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
+  __xbt_ex_terminate = &__xbt_ex_terminate_default;
+
+  /* Finish context module and SURF */
+  SIMIX_context_mod_exit();
+
+  surf_exit();
+
+#ifdef TIME_BENCH_AMDAHL
+  xbt_os_timer_stop(simix_global->timer_seq);
+  XBT_INFO("Amdhal timing informations. Sequential time: %lf; Parallel time: %lf",
+           xbt_os_timer_elapsed(simix_global->timer_seq),
+           xbt_os_timer_elapsed(simix_global->timer_par));
+  xbt_os_timer_free(simix_global->timer_seq);
+  xbt_os_timer_free(simix_global->timer_par);
+#endif
+
+  xbt_mallocator_free(simix_global->action_mallocator);
+  xbt_free(simix_global);
+  simix_global = NULL;
+
+  return;
 }
 
-/* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
-#include <signal.h>
 
-static void _XBT_CALL inthandler(int ignored)
+/**
+ * \ingroup SIMIX_API
+ * \brief A clock (in second).
+ *
+ * \return Return the clock.
+ */
+XBT_INLINE double SIMIX_get_clock(void)
 {
-   INFO0("CTRL-C pressed. Displaying status and bailing out");
-   __SIMIX_display_process_status();
-   exit(1);
+  if(MC_is_active()){
+    return MC_process_clock_get(SIMIX_process_self());
+  }else{
+    return surf_get_clock();
+  }
 }
 
-/** \ingroup msg_simulation
- * \brief Launch the SIMIX simulation
- */
-SIMIX_error_t SIMIX_main(void)
+static int process_syscall_color(void *p)
 {
-  smx_process_t process = NULL;
-  int i;
-  double elapsed_time = 0.0;
-  int state_modifications = 1;
-   
-  /* Prepare to display some more info when dying on Ctrl-C pressing */
-  signal(SIGINT,inthandler);
-   
-  /* Clean IO before the run */
-  fflush(stdout);
-  fflush(stderr);
-
-  surf_solve(); /* Takes traces into account. Returns 0.0 */
-/* xbt_fifo_size(msg_global->process_to_run) */
-  while (1) {
-    xbt_context_empty_trash();
-    if(xbt_swag_size(simix_global->process_to_run) && (elapsed_time>0)) {
-      DEBUG0("**************************************************");
-    }
-    /*
-    if((__stop_at_time>0) && (SIMIX_get_clock() >= __stop_at_time)) {
-      DEBUG0("Let's stop here!");
-    }*/
-
-    while ((process = xbt_swag_extract(simix_global->process_to_run))) {
-      DEBUG2("Scheduling %s on %s",         
-            process->name,
-            process->simdata->host->name);
-      simix_global->current_process = process;
-/*       fflush(NULL); */
-      xbt_context_schedule(process->simdata->context);
-      simix_global->current_process = NULL;
-    }
-    
-    {
-      surf_action_t action = NULL;
-      surf_resource_t resource = NULL;
-      //m_task_t task = NULL;
-
-      void *fun = NULL;
-      void *arg = NULL;
-
-      xbt_dynar_foreach(resource_list, i, resource) {
-       if(xbt_swag_size(resource->common_public->states.failed_action_set) ||
-          xbt_swag_size(resource->common_public->states.done_action_set))
-         state_modifications = 1;
-      }
-      
-      if(!state_modifications) {
-       DEBUG1("%f : Calling surf_solve",SIMIX_get_clock());
-       elapsed_time = surf_solve();
-       DEBUG1("Elapsed_time %f",elapsed_time);
-       
-       if (elapsed_time<0.0) {
-         /*       fprintf(stderr, "We're done %g\n",elapsed_time); */
-         break;
-       }
-      }
+  switch ((*(smx_process_t *)p)->simcall.call) {
+  case SIMCALL_NONE:
+  case SIMCALL_PROCESS_KILL:
+    return 2;
+  case SIMCALL_PROCESS_RESUME:
+    return 1;
+  default:
+    return 0;
+  }
+}
 
-      while (surf_timer_resource->extension_public->get(&fun,(void*)&arg)) {
-       DEBUG2("got %p %p", fun, arg);
-       if(fun==SIMIX_process_create_with_arguments) {
-         process_arg_t args = arg;
-         DEBUG2("Launching %s on %s", args->name, args->host->name);
-         process = SIMIX_process_create_with_arguments(args->name, args->code, 
-                                                     args->data, args->host,
-                                                     args->argc,args->argv);
-         if(args->kill_time > SIMIX_get_clock()) {
-           surf_timer_resource->extension_public->set(args->kill_time, 
-                                                      (void*) &SIMIX_process_kill,
-                                                      (void*) process);
-         }
-         xbt_free(args);
-       }
-       if(fun==SIMIX_process_kill) {
-         process = arg;
-         DEBUG2("Killing %s on %s", process->name, 
-                process->simdata->host->name);
-         SIMIX_process_kill(process);
-       }
-      }
-      
-      xbt_dynar_foreach(resource_list, i, resource) {
-       while ((action =
-               xbt_swag_extract(resource->common_public->states.
-                                failed_action_set))) {
-                                /*
-         task = action->data;
-         if(task) {
-           int _cursor;
-           DEBUG1("** %s failed **",task->name);
-           xbt_dynar_foreach(task->simdata->sleeping,_cursor,process) {
-             DEBUG3("\t preparing to wake up %s(%d) on %s",         
-                    process->name,process->simdata->PID,
-                    process->simdata->host->name);
-             xbt_fifo_unshift(msg_global->process_to_run, process);
-           }
-           process=NULL;
-         }*/
-       }
-       while ((action =
-               xbt_swag_extract(resource->common_public->states.
-                                done_action_set))) {
-         /*
-               task = action->data;
-         if(task) {
-           int _cursor;
-           DEBUG1("** %s done **",task->name);
-           xbt_dynar_foreach(task->simdata->sleeping,_cursor,process) {
-             DEBUG3("\t preparing to wake up %s(%d) on %s",         
-                    process->name,process->simdata->PID,
-                    process->simdata->host->name);
-             xbt_fifo_unshift(msg_global->process_to_run, process);
-           }
-           process=NULL;
-         }*/
-       }
+/**
+ * \ingroup SIMIX_API
+ * \brief Run the main simulation loop.
+ */
+void SIMIX_run(void)
+{
+  double time = 0;
+  smx_process_t process;
+  xbt_swag_t set;
+  surf_action_t action;
+  smx_timer_t timer;
+  surf_model_t model;
+  unsigned int iter;
+
+  do {
+    XBT_DEBUG("New Schedule Round; size(queue)=%lu",
+        xbt_dynar_length(simix_global->process_to_run));
+#ifdef TIME_BENCH_PER_SR
+    smx_ctx_raw_new_sr();
+#endif
+    while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
+      XBT_DEBUG("New Sub-Schedule Round; size(queue)=%lu",
+              xbt_dynar_length(simix_global->process_to_run));
+
+      /* Run all processes that are ready to run, possibly in parallel */
+#ifdef TIME_BENCH_AMDAHL
+      xbt_os_timer_stop(simix_global->timer_seq);
+      xbt_os_timer_resume(simix_global->timer_par);
+#endif
+      SIMIX_process_runall();
+#ifdef TIME_BENCH_AMDAHL
+      xbt_os_timer_stop(simix_global->timer_par);
+      xbt_os_timer_resume(simix_global->timer_seq);
+#endif
+
+      /* Move all killing processes to the end of the list, because killing a process that have an ongoing simcall is a bad idea */
+      xbt_dynar_three_way_partition(simix_global->process_that_ran, process_syscall_color);
+
+      /* answer sequentially and in a fixed arbitrary order all the simcalls that were issued during that sub-round */
+
+      /* WARNING, the order *must* be fixed or you'll jeopardize the simulation reproducibility (see RR-7653) */
+
+      /* Here, the order is ok because:
+       *
+       *   Short proof: only maestro adds stuff to the process_to_run array, so the execution order of user contexts do not impact its order.
+       *
+       *   Long proof: processes remain sorted through an arbitrary (implicit, complex but fixed) order in all cases.
+       *
+       *   - if there is no kill during the simulation, processes remain sorted according by their PID.
+       *     rational: This can be proved inductively.
+       *        Assume that process_to_run is sorted at a beginning of one round (it is at round 0: the deployment file is parsed linearly).
+       *        Let's show that it is still so at the end of this round.
+       *        - if a process is added when being created, that's from maestro. It can be either at startup
+       *          time (and then in PID order), or in response to a process_create simcall. Since simcalls are handled
+       *          in arbitrary order (inductive hypothesis), we are fine.
+       *        - If a process is added because it's getting killed, its subsequent actions shouldn't matter
+       *        - If a process gets added to process_to_run because one of their blocking action constituting the meat
+       *          of a simcall terminates, we're still good. Proof:
+       *          - You are added from SIMIX_simcall_answer() only. When this function is called depends on the resource
+       *            kind (network, cpu, disk, whatever), but the same arguments hold. Let's take communications as an example.
+       *          - For communications, this function is called from SIMIX_comm_finish().
+       *            This function itself don't mess with the order since simcalls are handled in FIFO order.
+       *            The function is called:
+       *            - before the comm starts (invalid parameters, or resource already dead or whatever).
+       *              The order then trivial holds since maestro didn't interrupt its handling of the simcall yet
+       *            - because the communication failed or were canceled after startup. In this case, it's called from the function
+       *              we are in, by the chunk:
+       *                       set = model->states.failed_action_set;
+       *                       while ((action = xbt_swag_extract(set)))
+       *                          SIMIX_simcall_post((smx_action_t) action->data);
+       *              This order is also fixed because it depends of the order in which the surf actions were
+       *              added to the system, and only maestro can add stuff this way, through simcalls.
+       *              We thus use the inductive hypothesis once again to conclude that the order in which actions are
+       *              poped out of the swag does not depend on the user code's execution order.
+       *            - because the communication terminated. In this case, actions are served in the order given by
+       *                       set = model->states.done_action_set;
+       *                       while ((action = xbt_swag_extract(set)))
+       *                          SIMIX_simcall_post((smx_action_t) action->data);
+       *              and the argument is very similar to the previous one.
+       *            So, in any case, the orders of calls to SIMIX_comm_finish() do not depend on the order in which user processes are executed.
+       *          So, in any cases, the orders of processes within process_to_run do not depend on the order in which user processes were executed previously.
+       *     So, if there is no killing in the simulation, the simulation reproducibility is not jeopardized.
+       *   - If there is some process killings, the order is changed by this decision that comes from user-land
+       *     But this decision may not have been motivated by a situation that were different because the simulation is not reproducible.
+       *     So, even the order change induced by the process killing is perfectly reproducible.
+       *
+       *   So science works, bitches [http://xkcd.com/54/].
+       *
+       *   We could sort the process_that_ran array completely so that we can describe the order in which simcalls are handled
+       *   (like "according to the PID of issuer"), but it's not mandatory (order is fixed already even if unfriendly).
+       *   That would thus be a pure waste of time.
+       */
+
+      xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
+        if (process->simcall.call != SIMCALL_NONE) {
+          SIMIX_simcall_pre(&process->simcall, 0);
+        }
       }
     }
-    state_modifications = 0;
-  }
 
-  if (xbt_swag_size(simix_global->process_list) == 0) {
-    INFO0("Congratulations ! Simulation terminated : all processes are over");
-    return SIMIX_OK;
-  } else {
-    INFO0("Oops ! Deadlock or code not perfectly clean.");
-    __SIMIX_display_process_status();
-    if(XBT_LOG_ISENABLED(simix, xbt_log_priority_debug) ||
-       XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_debug)) {
-      DEBUG0("Aborting!");
-      xbt_abort();
+    time = SIMIX_timer_next();
+    if (time != -1.0 || xbt_swag_size(simix_global->process_list) != 0)
+      time = surf_solve(time);
+
+    /* Notify all the hosts that have failed */
+    /* FIXME: iterate through the list of failed host and mark each of them */
+    /* as failed. On each host, signal all the running processes with host_fail */
+
+    /* Handle any pending timer */
+    while (xbt_heap_size(simix_timers) > 0 && SIMIX_get_clock() >= SIMIX_timer_next()) {
+       //FIXME: make the timers being real callbacks
+       // (i.e. provide dispatchers that read and expand the args) 
+       timer = xbt_heap_pop(simix_timers);
+       if (timer->func)
+         ((void (*)(void*))timer->func)(timer->args);
+    }
+    /* Wake up all processes waiting for a Surf action to finish */
+    xbt_dynar_foreach(model_list, iter, model) {
+      set = model->states.failed_action_set;
+      while ((action = xbt_swag_extract(set)))
+        SIMIX_simcall_post((smx_action_t) action->data);
+      set = model->states.done_action_set;
+      while ((action = xbt_swag_extract(set)))
+        SIMIX_simcall_post((smx_action_t) action->data);
     }
 
-    INFO0("Return a Warning.");
-    return SIMIX_WARNING;
+    /* Clean processes to destroy */
+    SIMIX_process_empty_trash();
+
+  } while (time != -1.0 || !xbt_dynar_is_empty(simix_global->process_to_run));
+
+  if (xbt_swag_size(simix_global->process_list) != 0) {
+
+#ifdef HAVE_TRACING
+    TRACE_end();
+#endif
+
+    XBT_WARN("Oops ! Deadlock or code not perfectly clean.");
+    SIMIX_display_process_status();
+    xbt_abort();
   }
 }
 
-/** \ingroup msg_simulation
- * \brief Kill all running process
-
- * \param reset_PIDs should we reset the PID numbers. A negative
- *   number means no reset and a positive number will be used to set the PID
- *   of the next newly created process.
+/**
+ *   \brief Set the date to execute a function
+ *
+ * Set the date to execute the function on the surf.
+ *   \param date Date to execute function
+ *   \param function Function to be executed
+ *   \param arg Parameters of the function
+ *
  */
-void SIMIX_process_killall()
+XBT_INLINE void SIMIX_timer_set(double date, void *function, void *arg)
 {
-  smx_process_t p = NULL;
-  smx_process_t self = SIMIX_process_self();
-
-  while((p=xbt_swag_extract(simix_global->process_list))) {
-    if(p!=self) SIMIX_process_kill(p);
-  }
+  smx_timer_t timer = xbt_new0(s_smx_timer_t, 1);
 
-  xbt_context_empty_trash();
+  timer->date = date;
+  timer->func = function;
+  timer->args = arg;
+  xbt_heap_push(simix_timers, timer, date);
+}
 
-  if(self) {
-    xbt_context_yield();
-  }
+/**
+ * \brief Registers a function to create a process.
+ *
+ * This function registers a function to be called
+ * when a new process is created. The function has
+ * to call SIMIX_process_create().
+ * \param function create process function
+ */
+XBT_INLINE void SIMIX_function_register_process_create(smx_creation_func_t
+                                                       function)
+{
+  simix_global->create_process_function = function;
+}
 
-  return;
+/**
+ * \brief Registers a function to kill a process.
+ *
+ * This function registers a function to be called when a
+ * process is killed. The function has to call the SIMIX_process_kill().
+ *
+ * \param function Kill process function
+ */
+XBT_INLINE void SIMIX_function_register_process_kill(void_pfn_smxprocess_t_smxprocess_t
+                                                     function)
+{
+  simix_global->kill_process_function = function;
 }
 
-/** \ingroup msg_simulation
- * \brief Clean the SIMIX simulation
+/**
+ * \brief Registers a function to cleanup a process.
+ *
+ * This function registers a user function to be called when
+ * a process ends properly.
+ *
+ * \param function cleanup process function
  */
-SIMIX_error_t SIMIX_clean(void)
+XBT_INLINE void SIMIX_function_register_process_cleanup(void_pfn_smxprocess_t
+                                                        function)
 {
-  xbt_fifo_item_t i = NULL;
-  smx_host_t h = NULL;
-  smx_process_t p = NULL;
+  simix_global->cleanup_process_function = function;
+}
 
 
-  while((p=xbt_swag_extract(simix_global->process_list))) {
-    SIMIX_process_kill(p);
+void SIMIX_display_process_status(void)
+{
+  if (simix_global->process_list == NULL) {
+    return;
   }
-  xbt_context_exit();
 
-  xbt_fifo_foreach(simix_global->host,i,h,smx_host_t) {
-    __SIMIX_host_destroy(h);
+  smx_process_t process = NULL;
+  int nbprocess = xbt_swag_size(simix_global->process_list);
+
+  XBT_INFO("%d processes are still running, waiting for something.", nbprocess);
+  /*  List the process and their state */
+  XBT_INFO
+    ("Legend of the following listing: \"Process <pid> (<name>@<host>): <status>\"");
+  xbt_swag_foreach(process, simix_global->process_list) {
+
+    if (process->waiting_action) {
+
+      const char* action_description = "unknown";
+      switch (process->waiting_action->type) {
+
+      case SIMIX_ACTION_EXECUTE:
+        action_description = "execution";
+        break;
+
+      case SIMIX_ACTION_PARALLEL_EXECUTE:
+        action_description = "parallel execution";
+        break;
+
+      case SIMIX_ACTION_COMMUNICATE:
+        action_description = "communication";
+        break;
+
+      case SIMIX_ACTION_SLEEP:
+        action_description = "sleeping";
+        break;
+
+      case SIMIX_ACTION_SYNCHRO:
+        action_description = "synchronization";
+        break;
+
+      case SIMIX_ACTION_IO:
+        action_description = "I/O";
+        break;
+      /* **************************************/
+      /* TUTORIAL: New API                    */
+      case SIMIX_ACTION_NEW_API:
+        action_description = "NEW API";
+      /* **************************************/
+
+        break;
+      }
+      XBT_INFO("Process %lu (%s@%s): waiting for %s action %p (%s) in state %d to finish",
+          process->pid, process->name, process->smx_host->name,
+          action_description, process->waiting_action,
+          process->waiting_action->name, (int)process->waiting_action->state);
+    }
+    else {
+      XBT_INFO("Process %lu (%s@%s)", process->pid, process->name, process->smx_host->name);
+    }
   }
-  xbt_fifo_free(simix_global->host);
-  xbt_swag_free(simix_global->process_to_run);
-  xbt_swag_free(simix_global->process_list);
-  xbt_dict_free(&(simix_global->registered_functions));
+}
 
-  simix_config_finalize();
-  free(simix_global);
-  surf_exit();
+static void* SIMIX_action_mallocator_new_f(void) {
+  smx_action_t action = xbt_new(s_smx_action_t, 1);
+  action->simcalls = xbt_fifo_new();
+  return action;
+}
 
-  return SIMIX_OK;
+static void SIMIX_action_mallocator_free_f(void* action) {
+  xbt_fifo_free(((smx_action_t) action)->simcalls);
+  xbt_free(action);
 }
 
+static void SIMIX_action_mallocator_reset_f(void* action) {
 
-/** \ingroup msg_easier_life
- * \brief A clock (in second).
- */
-double SIMIX_get_clock(void) {
-  return surf_get_clock();
+  // we also recycle the simcall list
+  xbt_fifo_t fifo = ((smx_action_t) action)->simcalls;
+  xbt_fifo_reset(fifo);
+  memset(action, 0, sizeof(s_smx_action_t));
+  ((smx_action_t) action)->simcalls = fifo;
 }
+
+xbt_dict_t SIMIX_pre_asr_get_properties(smx_simcall_t simcall, const char *name){
+  return SIMIX_asr_get_properties(name);
+}
+xbt_dict_t SIMIX_asr_get_properties(const char *name)
+{
+  return xbt_lib_get_or_null(as_router_lib, name, ROUTING_PROP_ASR_LEVEL);
+}
+