X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/462c1a223d0e829d1f593073173f6cd14b19edae..6a6c1a432ee6568c58d74d31746544e6afabdf6f:/src/simgrid/sg_config.c

diff --git a/src/simgrid/sg_config.c b/src/simgrid/sg_config.c
index b57bc229c1..624b6d8b21 100644
--- a/src/simgrid/sg_config.c
+++ b/src/simgrid/sg_config.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2009-2010, 2012-2013. The SimGrid Team.
+/* Copyright (c) 2009-2010, 2012-2015. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -18,9 +18,13 @@
 #include "instr/instr_interface.h"
 #include "simgrid/simix.h"
 #include "simgrid/sg_config.h"
+#ifdef HAVE_SMPI
 #include "smpi/smpi_interface.h"
+#endif
 #include "mc/mc.h"
-#include "instr/instr.h"
+#include "src/mc/mc_record.h"
+#include "simgrid/instr.h"
+#include "src/mc/mc_replay.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_config, surf,
                                 "About the configuration of simgrid");
@@ -55,6 +59,9 @@ static void sg_config_cmd_line(int *argc, char **argv)
 
       xbt_cfg_set_parse(_sg_cfg_set, opt);
       XBT_DEBUG("Did apply '%s' as config setting", opt);
+    } else if (!strcmp(argv[i], "--version")) {
+      printf("%s\n", SIMGRID_VERSION_STRING);
+      shall_exit = 1;
     } else if (!strcmp(argv[i], "--cfg-help") || !strcmp(argv[i], "--help")) {
       printf
           ("Description of the configuration accepted by this simulator:\n");
@@ -64,20 +71,21 @@ static void sg_config_cmd_line(int *argc, char **argv)
 "Each of these configurations can be used by adding\n"
 "    --cfg=<option name>:<option value>\n"
 "to the command line.\n"
+"\n"
 "You can also use --help-models to see the details of all models known by this simulator.\n"
-#ifdef HAVE_TRACING
 "\n"
 "You can also use --help-tracing to see the details of all tracing options known by this simulator.\n"
-#endif
 "\n"
 "You can also use --help-logs and --help-log-categories to see the details of logging output.\n"
+"\n"
+"You can also use --version to get SimGrid version information.\n"
 "\n"
         );
       shall_exit = 1;
     } else if (!strcmp(argv[i], "--help-models")) {
       int k;
 
-      model_help("workstation", surf_workstation_model_description);
+      model_help("host", surf_host_model_description);
       printf("\n");
       model_help("CPU", surf_cpu_model_description);
       printf("\n");
@@ -89,11 +97,9 @@ static void sg_config_cmd_line(int *argc, char **argv)
                surf_optimization_mode_description[k].description);
       printf("Both network and CPU models have 'Lazy' as default optimization level\n\n");
       shall_exit = 1;
-#ifdef HAVE_TRACING
     } else if (!strcmp(argv[i], "--help-tracing")) {
       TRACE_help (1);
       shall_exit = 1;
-#endif
     } else {
       argv[j++] = argv[i];
     }
@@ -106,8 +112,48 @@ static void sg_config_cmd_line(int *argc, char **argv)
     sg_cfg_exit_early();
 }
 
-/* callback of the workstation/model variable */
-static void _sg_cfg_cb__workstation_model(const char *name, int pos)
+/* callback of the plugin variable */
+static void _sg_cfg_cb__plugin(const char *name, int pos)
+{
+  char *val;
+
+  XBT_VERB("PLUGIN");
+  xbt_assert(_sg_cfg_init_status < 2,
+              "Cannot load a plugin after the initialization");
+
+  val = xbt_cfg_get_string(_sg_cfg_set, name);
+
+  if (!strcmp(val, "help")) {
+    model_help("plugin", surf_plugin_description);
+    sg_cfg_exit_early();
+  }
+
+  /* New Module missing */
+  int plugin_id = find_model_description(surf_plugin_description, val);
+  surf_plugin_description[plugin_id].model_init_preparse();
+}
+
+/* callback of the host/model variable */
+static void _sg_cfg_cb__host_model(const char *name, int pos)
+{
+  char *val;
+
+  xbt_assert(_sg_cfg_init_status < 2,
+              "Cannot change the model after the initialization");
+
+  val = xbt_cfg_get_string(_sg_cfg_set, name);
+
+  if (!strcmp(val, "help")) {
+    model_help("host", surf_host_model_description);
+    sg_cfg_exit_early();
+  }
+
+  /* Make sure that the model exists */
+  find_model_description(surf_host_model_description, val);
+}
+
+/* callback of the vm/model variable */
+static void _sg_cfg_cb__vm_model(const char *name, int pos)
 {
   char *val;
 
@@ -117,12 +163,12 @@ static void _sg_cfg_cb__workstation_model(const char *name, int pos)
   val = xbt_cfg_get_string(_sg_cfg_set, name);
 
   if (!strcmp(val, "help")) {
-    model_help("workstation", surf_workstation_model_description);
+    model_help("vm", surf_vm_model_description);
     sg_cfg_exit_early();
   }
 
   /* Make sure that the model exists */
-  find_model_description(surf_workstation_model_description, val);
+  find_model_description(surf_vm_model_description, val);
 }
 
 /* callback of the cpu/model variable */
@@ -182,7 +228,7 @@ static void _sg_cfg_cb__storage_mode(const char *name, int pos)
   find_model_description(surf_storage_model_description, val);
 }
 
-/* callback of the workstation_model variable */
+/* callback of the network_model variable */
 static void _sg_cfg_cb__network_model(const char *name, int pos)
 {
   char *val;
@@ -212,6 +258,11 @@ static void _sg_cfg_cb__maxmin_precision(const char* name, int pos)
   sg_maxmin_precision = xbt_cfg_get_double(_sg_cfg_set, name);
 }
 
+static void _sg_cfg_cb__surf_precision(const char* name, int pos)
+{
+  sg_surf_precision = xbt_cfg_get_double(_sg_cfg_set, name);
+}
+
 static void _sg_cfg_cb__sender_gap(const char* name, int pos)
 {
   sg_sender_gap = xbt_cfg_get_double(_sg_cfg_set, name);
@@ -251,7 +302,7 @@ static void _sg_cfg_cb__coll(const char *category,
   }
 
   /* New Module missing */
-  find_coll_description(table, val);
+  find_coll_description(table, val, category);
 }
 static void _sg_cfg_cb__coll_gather(const char *name, int pos){
   _sg_cfg_cb__coll("gather", mpi_coll_gather_description, name, pos);
@@ -291,6 +342,21 @@ static void _sg_cfg_cb__coll_scatter(const char *name, int pos){
 static void _sg_cfg_cb__coll_barrier(const char *name, int pos){
   _sg_cfg_cb__coll("barrier", mpi_coll_barrier_description, name, pos);
 }
+
+static void _sg_cfg_cb__wtime_sleep(const char *name, int pos){
+  smpi_wtime_sleep = xbt_cfg_get_double(_sg_cfg_set, name);
+}
+
+static void _sg_cfg_cb__iprobe_sleep(const char *name, int pos){
+  smpi_iprobe_sleep = xbt_cfg_get_double(_sg_cfg_set, name);
+}
+
+static void _sg_cfg_cb__test_sleep(const char *name, int pos){
+  smpi_test_sleep = xbt_cfg_get_double(_sg_cfg_set, name);
+}
+
+
+
 #endif
 
 /* callback of the inclusion path */
@@ -301,18 +367,25 @@ static void _sg_cfg_cb__surf_path(const char *name, int pos)
 }
 
 /* callback to decide if we want to use the model-checking */
-#include "xbt_modinter.h"
+#include "src/xbt_modinter.h"
+
 #ifdef HAVE_MC
 extern int _sg_do_model_check;   /* this variable lives in xbt_main until I find a right location for it */
+extern int _sg_do_model_check_record;
 #endif
 
-static void _sg_cfg_cb_model_check(const char *name, int pos)
+static void _sg_cfg_cb_model_check_replay(const char *name, int pos)
+{
+  MC_record_path = xbt_cfg_get_string(_sg_cfg_set, name);
+}
+
+static void _sg_cfg_cb_model_check_record(const char *name, int pos)
 {
 #ifdef HAVE_MC
-  _sg_do_model_check = xbt_cfg_get_boolean(_sg_cfg_set, name);
+  _sg_do_model_check_record = xbt_cfg_get_boolean(_sg_cfg_set, name);
 #else
   if (xbt_cfg_get_boolean(_sg_cfg_set, name)) {
-    xbt_die("You tried to activate the model-checking from the command line, but it was not compiled in. Change your settings in cmake, recompile and try again");
+    xbt_die("You tried to activate the model-checking record from the command line, but it was not compiled in. Change your settings in cmake, recompile and try again");
   }
 #endif
 }
@@ -342,6 +415,12 @@ static void _sg_cfg_cb_context_stack_size(const char *name, int pos)
   smx_context_stack_size = xbt_cfg_get_int(_sg_cfg_set, name) * 1024;
 }
 
+static void _sg_cfg_cb_context_guard_size(const char *name, int pos)
+{
+  smx_context_guard_size_was_set = 1;
+  smx_context_guard_size = xbt_cfg_get_int(_sg_cfg_set, name) * xbt_pagesize;
+}
+
 static void _sg_cfg_cb_contexts_nthreads(const char *name, int pos)
 {
   SIMIX_context_set_nthreads(xbt_cfg_get_int(_sg_cfg_set, name));
@@ -373,14 +452,16 @@ static void _sg_cfg_cb_contexts_parallel_mode(const char *name, int pos)
 static void _sg_cfg_cb__surf_network_coordinates(const char *name,
                                                  int pos)
 {
+  static int already_set = 0;
   int val = xbt_cfg_get_boolean(_sg_cfg_set, name);
   if (val) {
-    if (!COORD_HOST_LEVEL) {
+    if (!already_set) {
       COORD_HOST_LEVEL = xbt_lib_add_level(host_lib,xbt_dynar_free_voidp);
       COORD_ASR_LEVEL  = xbt_lib_add_level(as_router_lib,xbt_dynar_free_voidp);
     }
+    already_set = 1;
   } else
-    if (COORD_HOST_LEVEL)
+    if (already_set)
       xbt_die("Setting of whether to use coordinate cannot be disabled once set.");
 }
 
@@ -390,125 +471,93 @@ static void _sg_cfg_cb__surf_network_crosstraffic(const char *name,
   sg_network_crosstraffic = xbt_cfg_get_boolean(_sg_cfg_set, name);
 }
 
-#ifdef HAVE_GTNETS
-static void _sg_cfg_cb__gtnets_jitter(const char *name, int pos)
+/* build description line with possible values */
+static void describe_model(char *result,
+                           const s_surf_model_description_t model_description[],
+                           const char *name,
+                           const char *description)
 {
-  sg_gtnets_jitter = xbt_cfg_get_double(_sg_cfg_set, name);
-}
-
-static void _sg_cfg_cb__gtnets_jitter_seed(const char *name, int pos)
-{
-  sg_gtnets_jitter_seed = xbt_cfg_get_int(_sg_cfg_set, name);
+  char *p = result +
+    sprintf(result, "%s. Possible values: %s", description,
+            model_description[0].name ? model_description[0].name : "n/a");
+  int i;
+  for (i = 1; model_description[i].name; i++)
+    p += sprintf(p, ", %s", model_description[i].name);
+  sprintf(p,
+      ".\n       (use 'help' as a value to see the long description of each %s)",
+          name);
 }
-#endif
 
 /* create the config set, register what should be and parse the command line*/
 void sg_config_init(int *argc, char **argv)
 {
-  char *description = xbt_malloc(1024);
-  char *p;
-  int i;
+  char description[1024];
 
   /* Create the configuration support */
   if (_sg_cfg_init_status == 0) { /* Only create stuff if not already inited */
-    sprintf(description,
-            "The model to use for the CPU. Possible values: ");
-    p = description;
-    while (*(++p) != '\0');
-    for (i = 0; surf_cpu_model_description[i].name; i++)
-      p += sprintf(p, "%s%s", (i == 0 ? "" : ", "),
-                   surf_cpu_model_description[i].name);
-    sprintf(p,
-            ".\n       (use 'help' as a value to see the long description of each model)");
+
+    /* Plugins configuration */
+    describe_model(description, surf_plugin_description,
+                   "plugin", "The plugins");
+    xbt_cfg_register(&_sg_cfg_set, "plugin", description,
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__plugin, NULL);
+
+    describe_model(description, surf_cpu_model_description,
+                   "model", "The model to use for the CPU");
     xbt_cfg_register(&_sg_cfg_set, "cpu/model", description,
                      xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__cpu_model, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "cpu/model", "Cas01");
 
-    while (*(++p) != '\0');
-    for (i = 0; surf_optimization_mode_description[i].name; i++)
-      p += sprintf(p, "%s%s", (i == 0 ? "" : ", "),
-                   surf_optimization_mode_description[i].name);
-    sprintf(p,
-            ".\n       (use 'help' as a value to see the long description of each optimization mode)");
+    describe_model(description, surf_optimization_mode_description,
+                   "optimization mode",
+                   "The optimization modes to use for the CPU");
     xbt_cfg_register(&_sg_cfg_set, "cpu/optim", description,
                      xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__optimization_mode, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "cpu/optim", "Lazy");
 
-    sprintf(description,
-            "The model to use for the storage. Possible values: ");
-    p = description;
-    while (*(++p) != '\0');
-    for (i = 0; surf_storage_model_description[i].name; i++)
-      p += sprintf(p, "%s%s", (i == 0 ? "" : ", "),
-                   surf_storage_model_description[i].name);
-    sprintf(p,
-            ".\n       (use 'help' as a value to see the long description of each model)");
+    describe_model(description, surf_storage_model_description,
+                   "model", "The model to use for the storage");
     xbt_cfg_register(&_sg_cfg_set, "storage/model", description,
                      xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__storage_mode, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "storage/model", "default");
 
-    /* ********************************************************************* */
-    /* TUTORIAL: New model                                                   */
-    sprintf(description,
-            "The model to use for the New model. Possible values: ");
-    p = description;
-    while (*(++p) != '\0');
-    for (i = 0; surf_new_model_description[i].name; i++)
-      p += sprintf(p, "%s%s", (i == 0 ? "" : ", "),
-                   surf_new_model_description[i].name);
-    sprintf(p,
-            ".\n       (use 'help' as a value to see the long description of each model)");
-    xbt_cfg_register(&_sg_cfg_set, "new_model/model", description,
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__storage_mode, NULL);
-    xbt_cfg_setdefault_string(_sg_cfg_set, "new_model/model", "default");
-    /* ********************************************************************* */
-
-    sprintf(description,
-            "The model to use for the network. Possible values: ");
-    p = description;
-    while (*(++p) != '\0');
-    for (i = 0; surf_network_model_description[i].name; i++)
-      p += sprintf(p, "%s%s", (i == 0 ? "" : ", "),
-                   surf_network_model_description[i].name);
-    sprintf(p,
-            ".\n       (use 'help' as a value to see the long description of each model)");
+    describe_model(description, surf_network_model_description,
+                   "model", "The model to use for the network");
     xbt_cfg_register(&_sg_cfg_set, "network/model", description,
                      xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__network_model, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "network/model", "LV08");
 
-    sprintf(description,
-            "The optimization modes to use for the network. Possible values: ");
-    p = description;
-    while (*(++p) != '\0');
-    for (i = 0; surf_optimization_mode_description[i].name; i++)
-      p += sprintf(p, "%s%s", (i == 0 ? "" : ", "),
-                   surf_optimization_mode_description[i].name);
-    sprintf(p,
-            ".\n       (use 'help' as a value to see the long description of each optimization mode)");
+    describe_model(description, surf_optimization_mode_description,
+                   "optimization mode",
+                   "The optimization modes to use for the network");
     xbt_cfg_register(&_sg_cfg_set, "network/optim", description,
                      xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__optimization_mode, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "network/optim", "Lazy");
 
-    sprintf(description,
-            "The model to use for the workstation. Possible values: ");
-    p = description;
-    while (*(++p) != '\0');
-    for (i = 0; surf_workstation_model_description[i].name; i++)
-      p += sprintf(p, "%s%s", (i == 0 ? "" : ", "),
-                   surf_workstation_model_description[i].name);
-    sprintf(p,
-            ".\n       (use 'help' as a value to see the long description of each model)");
-    xbt_cfg_register(&_sg_cfg_set, "workstation/model", description,
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__workstation_model, NULL);
-    xbt_cfg_setdefault_string(_sg_cfg_set, "workstation/model", "default");
+    describe_model(description, surf_host_model_description,
+                   "model", "The model to use for the host");
+    xbt_cfg_register(&_sg_cfg_set, "host/model", description,
+                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__host_model, NULL);
+    xbt_cfg_setdefault_string(_sg_cfg_set, "host/model", "default");
+
+    describe_model(description, surf_vm_model_description,
+                   "model", "The model to use for the vm");
+    xbt_cfg_register(&_sg_cfg_set, "vm/model", description,
+                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__vm_model, NULL);
+    xbt_cfg_setdefault_string(_sg_cfg_set, "vm/model", "default");
 
     xbt_cfg_register(&_sg_cfg_set, "network/TCP_gamma",
                      "Size of the biggest TCP window (cat /proc/sys/net/ipv4/tcp_[rw]mem for recv/send window; Use the last given value, which is the max window size)",
                      xbt_cfgelm_double, 1, 1, _sg_cfg_cb__tcp_gamma, NULL);
     xbt_cfg_setdefault_double(_sg_cfg_set, "network/TCP_gamma", 4194304.0);
 
+    xbt_cfg_register(&_sg_cfg_set, "surf/precision",
+                     "Numerical precision used when updating simulation times (hence this value is expressed in seconds)",
+                     xbt_cfgelm_double, 1, 1, _sg_cfg_cb__surf_precision, NULL);
+    xbt_cfg_setdefault_double(_sg_cfg_set, "surf/precision", 0.00001);
+
     xbt_cfg_register(&_sg_cfg_set, "maxmin/precision",
-                     "Numerical precision used when updating simulation models (epsilon in double comparisons)",
+                     "Numerical precision used when computing resource sharing (hence this value is expressed in ops/sec or bytes/sec)",
                      xbt_cfgelm_double, 1, 1, _sg_cfg_cb__maxmin_precision, NULL);
     xbt_cfg_setdefault_double(_sg_cfg_set, "maxmin/precision", 0.00001);
 
@@ -517,7 +566,8 @@ void sg_config_init(int *argc, char **argv)
     xbt_cfg_register(&_sg_cfg_set, "network/sender_gap",
                      "Minimum gap between two overlapping sends",
                      xbt_cfgelm_double, 1, 1, _sg_cfg_cb__sender_gap, NULL);
-    /* default for "network/sender_gap" is set in network.c */
+    /* real default for "network/sender_gap" is set in network_smpi.cpp */
+    xbt_cfg_setdefault_double(_sg_cfg_set, "network/sender_gap", NAN);
 
     xbt_cfg_register(&_sg_cfg_set, "network/latency_factor",
                      "Correction factor to apply to the provided latency (default value set by network model)",
@@ -532,105 +582,175 @@ void sg_config_init(int *argc, char **argv)
     xbt_cfg_register(&_sg_cfg_set, "network/weight_S",
                      "Correction factor to apply to the weight of competing streams (default value set by network model)",
                      xbt_cfgelm_double, 1, 1, _sg_cfg_cb__weight_S, NULL);
-    /* default for "network/weight_S" is set in network.c */
+    /* real default for "network/weight_S" is set in network_*.cpp */
+    xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", NAN);
 
     /* Inclusion path */
     xbt_cfg_register(&_sg_cfg_set, "path",
                      "Lookup path for inclusions in platform and deployment XML files",
-                     xbt_cfgelm_string, 0, 0, _sg_cfg_cb__surf_path, NULL);
+                     xbt_cfgelm_string, 1, 0, _sg_cfg_cb__surf_path, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "cpu/maxmin_selective_update",
                      "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)",
-                     xbt_cfgelm_boolean, 0, 1, NULL, NULL);
+                     xbt_cfgelm_boolean, 1, 1, NULL, NULL);
     xbt_cfg_setdefault_boolean(_sg_cfg_set, "cpu/maxmin_selective_update", "no");
 
     xbt_cfg_register(&_sg_cfg_set, "network/maxmin_selective_update",
                      "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)",
-                     xbt_cfgelm_boolean, 0, 1, NULL, NULL);
+                     xbt_cfgelm_boolean, 1, 1, NULL, NULL);
     xbt_cfg_setdefault_boolean(_sg_cfg_set, "network/maxmin_selective_update", "no");
 
+    /* Replay (this part is enabled event if MC it disabled) */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/replay",
+      "Uenable replay mode with the given path",
+      xbt_cfgelm_string, 0, 1, _sg_cfg_cb_model_check_replay, NULL);
+
 #ifdef HAVE_MC
-    /* do model-checking */
-    xbt_cfg_register(&_sg_cfg_set, "model-check",
-                     "Verify the system through model-checking instead of simulating it (EXPERIMENTAL)",
-                     xbt_cfgelm_boolean, 0, 1, _sg_cfg_cb_model_check, NULL);
-    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check", "no");
+    /* do model-checking-record */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/record",
+                     "Record the model-checking paths",
+                     xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb_model_check_record, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/record", "no");
 
     /* do stateful model-checking */
     xbt_cfg_register(&_sg_cfg_set, "model-check/checkpoint",
                      "Specify the amount of steps between checkpoints during stateful model-checking (default: 0 => stateless verification). "
-                     "If value=on, one checkpoint is saved for each step => faster verification, but huge memory consumption; higher values are good compromises between speed and memory consumption.",
-                     xbt_cfgelm_int, 0, 1, _mc_cfg_cb_checkpoint, NULL);
+                     "If value=1, one checkpoint is saved for each step => faster verification, but huge memory consumption; higher values are good compromises between speed and memory consumption.",
+                     xbt_cfgelm_int, 1, 1, _mc_cfg_cb_checkpoint, NULL);
     xbt_cfg_setdefault_int(_sg_cfg_set, "model-check/checkpoint", 0);
 
+    /* do stateful model-checking */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/sparse-checkpoint",
+                     "Use sparse per-page snapshots.",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_sparse_checkpoint, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/sparse-checkpoint", "no");
+
+    /* do stateful model-checking */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/soft-dirty",
+                     "Use sparse per-page snapshots.",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_soft_dirty, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/soft-dirty", "no");
+
+    xbt_cfg_register(&_sg_cfg_set, "model-check/ksm",
+                     "Kernel same-page merging",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_ksm, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/ksm", "no");
+
     /* do liveness model-checking */
     xbt_cfg_register(&_sg_cfg_set, "model-check/property",
                      "Specify the name of the file containing the property. It must be the result of the ltl2ba program.",
-                     xbt_cfgelm_string, 0, 1, _mc_cfg_cb_property, NULL);
+                     xbt_cfgelm_string, 1, 1, _mc_cfg_cb_property, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "model-check/property", "");
 
+    /* do communications determinism model-checking */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/communications_determinism",
+                     "Enable/disable the detection of determinism in the communications schemes",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_comms_determinism, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/communications_determinism", "no");
+
+    /* do send determinism model-checking */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/send_determinism",
+                     "Enable/disable the detection of send-determinism in the communications schemes",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_send_determinism, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/send_determinism", "no");
+
     /* Specify the kind of model-checking reduction */
     xbt_cfg_register(&_sg_cfg_set, "model-check/reduction",
                      "Specify the kind of exploration reduction (either none or DPOR)",
-                     xbt_cfgelm_string, 0, 1, _mc_cfg_cb_reduce, NULL);
+                     xbt_cfgelm_string, 1, 1, _mc_cfg_cb_reduce, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "model-check/reduction", "dpor");
 
     /* Enable/disable timeout for wait requests with model-checking */
     xbt_cfg_register(&_sg_cfg_set, "model-check/timeout",
                      "Enable/Disable timeout for wait requests",
-                     xbt_cfgelm_boolean, 0, 1, _mc_cfg_cb_timeout, NULL);
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_timeout, NULL);
     xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/timeout", "no");
 
+    /* Enable/disable global hash computation with model-checking */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/hash",
+                     "Enable/Disable state hash for state comparison (exprimental)",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_hash, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/hash", "no");
+
+    /* Set max depth exploration */
+    /* Currently, this option cannot be used. */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/snapshot_fds",
+                     "Whether file descriptors must be snapshoted",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_snapshot_fds, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/snapshot_fds", "no");
+
     /* Set max depth exploration */
     xbt_cfg_register(&_sg_cfg_set, "model-check/max_depth",
                      "Specify the max depth of exploration (default : 1000)",
-                     xbt_cfgelm_int, 0, 1, _mc_cfg_cb_max_depth, NULL);
+                     xbt_cfgelm_int, 1, 1, _mc_cfg_cb_max_depth, NULL);
     xbt_cfg_setdefault_int(_sg_cfg_set, "model-check/max_depth", 1000);
 
     /* Set number of visited state stored for state comparison reduction*/
     xbt_cfg_register(&_sg_cfg_set, "model-check/visited",
                      "Specify the number of visited state stored for state comparison reduction. If value=5, the last 5 visited states are stored",
-                     xbt_cfgelm_int, 0, 1, _mc_cfg_cb_visited, NULL);
+                     xbt_cfgelm_int, 1, 1, _mc_cfg_cb_visited, NULL);
     xbt_cfg_setdefault_int(_sg_cfg_set, "model-check/visited", 0);
 
     /* Set file name for dot output of graph state */
     xbt_cfg_register(&_sg_cfg_set, "model-check/dot_output",
                      "Specify the name of dot file corresponding to graph state",
-                     xbt_cfgelm_string, 0, 1, _mc_cfg_cb_dot_output, NULL);
+                     xbt_cfgelm_string, 1, 1, _mc_cfg_cb_dot_output, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "model-check/dot_output", "");
+
+     /* Enable/disable non progressive cycles detection with model-checking */
+    xbt_cfg_register(&_sg_cfg_set, "model-check/termination",
+                     "Enable/Disable non progressive cycle detection",
+                     xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_termination, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/termination", "no");
 #endif
 
     /* do verbose-exit */
     xbt_cfg_register(&_sg_cfg_set, "verbose-exit",
                      "Activate the \"do nothing\" mode in Ctrl-C",
-                     xbt_cfgelm_boolean, 0, 1, _sg_cfg_cb_verbose_exit, NULL);
+                     xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb_verbose_exit, NULL);
     xbt_cfg_setdefault_boolean(_sg_cfg_set, "verbose-exit", "yes");
 
     /* context factory */
-    sprintf(description,
-            "Context factory to use in SIMIX. Possible values: thread");
     const char *dflt_ctx_fact = "thread";
+    {
+      char *p = description +
+        sprintf(description,
+                "Context factory to use in SIMIX. Possible values: %s",
+                dflt_ctx_fact);
 #ifdef CONTEXT_UCONTEXT
-    strcat(description, ", ucontext");
-    dflt_ctx_fact = "ucontext";
+      dflt_ctx_fact = "ucontext";
+      p += sprintf(p, ", %s", dflt_ctx_fact);
 #endif
 #ifdef HAVE_RAWCTX
-    strcat(description, ", raw");
-    dflt_ctx_fact = "raw";
+      dflt_ctx_fact = "raw";
+      p += sprintf(p, ", %s", dflt_ctx_fact);
 #endif
-    strcat(description, ".");
+      sprintf(p, ".");
+    }
     xbt_cfg_register(&_sg_cfg_set, "contexts/factory", description,
                      xbt_cfgelm_string, 1, 1, _sg_cfg_cb_context_factory, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "contexts/factory", dflt_ctx_fact);
 
-    /* stack size of contexts in Ko */
+    /* stack size of contexts in KiB */
     xbt_cfg_register(&_sg_cfg_set, "contexts/stack_size",
-                     "Stack size of contexts in Kib",
+                     "Stack size of contexts in KiB",
                      xbt_cfgelm_int, 1, 1, _sg_cfg_cb_context_stack_size, NULL);
-    xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/stack_size", 128);
+    xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/stack_size", 8*1024);
     /* No, it was not set yet (the above setdefault() changed this to 1). */
     smx_context_stack_size_was_set = 0;
 
+    /* guard size for contexts stacks in memory pages */
+    xbt_cfg_register(&_sg_cfg_set, "contexts/guard_size",
+                     "Guard size for contexts stacks in memory pages",
+                     xbt_cfgelm_int, 1, 1, _sg_cfg_cb_context_guard_size, NULL);
+#if defined(_XBT_WIN32) || (PTH_STACKGROWTH != -1)
+    xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/guard_size", 0);
+#else
+    xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/guard_size", 1);
+#endif
+    /* No, it was not set yet (the above setdefault() changed this to 1). */
+    smx_context_guard_size_was_set = 0;
+
     /* number of parallel threads for user processes */
     xbt_cfg_register(&_sg_cfg_set, "contexts/nthreads",
                      "Number of parallel threads used to execute user contexts",
@@ -660,20 +780,9 @@ void sg_config_init(int *argc, char **argv)
 
     xbt_cfg_register(&_sg_cfg_set, "network/crosstraffic",
                      "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)",
-                     xbt_cfgelm_boolean, 0, 1, _sg_cfg_cb__surf_network_crosstraffic, NULL);
+                     xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb__surf_network_crosstraffic, NULL);
     xbt_cfg_setdefault_boolean(_sg_cfg_set, "network/crosstraffic", "no");
 
-#ifdef HAVE_GTNETS
-    xbt_cfg_register(&_sg_cfg_set, "gtnets/jitter",
-                     "Double value to oscillate the link latency, uniformly in random interval [-latency*gtnets_jitter,latency*gtnets_jitter)",
-                     xbt_cfgelm_double, 1, 1, _sg_cfg_cb__gtnets_jitter, NULL);
-    xbt_cfg_setdefault_double(_sg_cfg_set, "gtnets/jitter", 0.0);
-
-    xbt_cfg_register(&_sg_cfg_set, "gtnets/jitter_seed",
-                     "Use a positive seed to reproduce jitted results, value must be in [1,1e8], default is 10",
-                     xbt_cfgelm_int, 0, 1, _sg_cfg_cb__gtnets_jitter_seed, NULL);
-    xbt_cfg_setdefault_int(_sg_cfg_set, "gtnets/jitter_seed", 10);
-#endif
 #ifdef HAVE_NS3
     xbt_cfg_register(&_sg_cfg_set, "ns3/TcpModel",
                      "The ns3 tcp model can be : NewReno or Reno or Tahoe",
@@ -681,6 +790,27 @@ void sg_config_init(int *argc, char **argv)
     xbt_cfg_setdefault_string(_sg_cfg_set, "ns3/TcpModel", "default");
 #endif
 
+    //For smpi/bw_factor and smpi/lat_factor
+    //Default value have to be "threshold0:value0;threshold1:value1;...;thresholdN:valueN"
+    //test is if( size >= thresholdN ) return valueN;
+    //Values can be modified with command line --cfg=smpi/bw_factor:"threshold0:value0;threshold1:value1;...;thresholdN:valueN"
+    //  or with tag config put line <prop id="smpi/bw_factor" value="threshold0:value0;threshold1:value1;...;thresholdN:valueN"></prop>
+    // SMPI model can be used without enable_smpi, so keep this the ifdef.
+    xbt_cfg_register(&_sg_cfg_set, "smpi/bw_factor",
+                     "Bandwidth factors for smpi.",
+                     xbt_cfgelm_string, 1, 1, NULL, NULL);
+    xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/bw_factor", "65472:0.940694;15424:0.697866;9376:0.58729;5776:1.08739;3484:0.77493;1426:0.608902;732:0.341987;257:0.338112;0:0.812084");
+
+    xbt_cfg_register(&_sg_cfg_set, "smpi/lat_factor",
+                     "Latency factors for smpi.",
+                     xbt_cfgelm_string, 1, 1, NULL, NULL);
+    xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/lat_factor", "65472:11.6436;15424:3.48845;9376:2.59299;5776:2.18796;3484:1.88101;1426:1.61075;732:1.9503;257:1.95341;0:2.01467");
+    
+    xbt_cfg_register(&_sg_cfg_set, "smpi/IB_penalty_factors",
+                     "Correction factor to communications using Infiniband model with contention (default value based on Stampede cluster profiling)",
+                     xbt_cfgelm_string, 1, 1, NULL, NULL);
+    xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/IB_penalty_factors", "0.965;0.925;1.35");
+    
 #ifdef HAVE_SMPI
     xbt_cfg_register(&_sg_cfg_set, "smpi/running_power",
                      "Power of the host running the simulation (in flop/s). Used to bench the operations.",
@@ -692,13 +822,18 @@ void sg_config_init(int *argc, char **argv)
                      xbt_cfgelm_boolean, 1, 1, NULL, NULL);
     xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/display_timing", "no");
 
+    xbt_cfg_register(&_sg_cfg_set, "smpi/simulate_computation",
+                     "Boolean indicating whether the computational part of the simulated application should be simulated.",
+                     xbt_cfgelm_boolean, 1, 1, NULL, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/simulate_computation", "yes");
+
     xbt_cfg_register(&_sg_cfg_set, "smpi/use_shared_malloc",
                      "Boolean indicating whether we should use shared memory when using SMPI_SHARED_MALLOC. Allows user to disable it for debug purposes.",
                      xbt_cfgelm_boolean, 1, 1, NULL, NULL);
     xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/use_shared_malloc", "yes");
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/cpu_threshold",
-                     "Minimal computation time (in seconds) not discarded.",
+                     "Minimal computation time (in seconds) not discarded, or -1 for infinity.",
                      xbt_cfgelm_double, 1, 1, NULL, NULL);
     xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/cpu_threshold", 1e-6);
 
@@ -712,20 +847,10 @@ void sg_config_init(int *argc, char **argv)
                      xbt_cfgelm_int, 1, 1, NULL, NULL);
     xbt_cfg_setdefault_int(_sg_cfg_set, "smpi/send_is_detached_thres", 65536);
 
-    //For smpi/bw_factor and smpi/lat_factor
-    //Default value have to be "threshold0:value0;threshold1:value1;...;thresholdN:valueN"
-    //test is if( size >= thresholdN ) return valueN;
-    //Values can be modified with command line --cfg=smpi/bw_factor:"threshold0:value0;threshold1:value1;...;thresholdN:valueN"
-    //  or with tag config put line <prop id="smpi/bw_factor" value="threshold0:value0;threshold1:value1;...;thresholdN:valueN"></prop>
-    xbt_cfg_register(&_sg_cfg_set, "smpi/bw_factor",
-                     "Bandwidth factors for smpi.",
-                     xbt_cfgelm_string, 1, 1, NULL, NULL);
-    xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/bw_factor", "65472:0.940694;15424:0.697866;9376:0.58729;5776:1.08739;3484:0.77493;1426:0.608902;732:0.341987;257:0.338112;0:0.812084");
-
-    xbt_cfg_register(&_sg_cfg_set, "smpi/lat_factor",
-                     "Latency factors for smpi.",
-                     xbt_cfgelm_string, 1, 1, NULL, NULL);
-    xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/lat_factor", "65472:11.6436;15424:3.48845;9376:2.59299;5776:2.18796;3484:1.88101;1426:1.61075;732:1.9503;257:1.95341;0:2.01467");
+    xbt_cfg_register(&_sg_cfg_set, "smpi/privatize_global_variables",
+                     "Boolean indicating whether we should privatize global variable at runtime.",
+                     xbt_cfgelm_boolean, 1, 1, NULL, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/privatize_global_variables", "no");
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/os",
                      "Small messages timings (MPI_Send minimum time for small messages)",
@@ -741,10 +866,22 @@ void sg_config_init(int *argc, char **argv)
                      "Small messages timings (MPI_Recv minimum time for small messages)",
                      xbt_cfgelm_string, 1, 1, NULL, NULL);
     xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/or", "1:0:0:0:0");
+
     xbt_cfg_register(&_sg_cfg_set, "smpi/iprobe",
                      "Minimum time to inject inside a call to MPI_Iprobe",
-                     xbt_cfgelm_double, 1, 1, NULL, NULL);
+                     xbt_cfgelm_double, 1, 1, _sg_cfg_cb__iprobe_sleep, NULL);
     xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/iprobe", 1e-4);
+
+    xbt_cfg_register(&_sg_cfg_set, "smpi/test",
+                     "Minimum time to inject inside a call to MPI_Test",
+                     xbt_cfgelm_double, 1, 1, _sg_cfg_cb__test_sleep, NULL);
+    xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/test", 1e-4);
+
+    xbt_cfg_register(&_sg_cfg_set, "smpi/wtime",
+                     "Minimum time to inject inside a call to MPI_Wtime",
+                     xbt_cfgelm_double, 1, 1, _sg_cfg_cb__wtime_sleep, NULL);
+    xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/wtime", 0.0);
+
     xbt_cfg_register(&_sg_cfg_set, "smpi/coll_selector",
                      "Which collective selector to use",
                      xbt_cfgelm_string, 1, 1, NULL, NULL);
@@ -752,49 +889,54 @@ void sg_config_init(int *argc, char **argv)
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/gather",
                      "Which collective to use for gather",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_gather, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_gather, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/allgather",
                      "Which collective to use for allgather",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_allgather, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_allgather, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/barrier",
                      "Which collective to use for barrier",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_barrier, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_barrier, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/reduce_scatter",
                      "Which collective to use for reduce_scatter",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_reduce_scatter, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_reduce_scatter, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/scatter",
                      "Which collective to use for scatter",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_scatter, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_scatter, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/allgatherv",
                      "Which collective to use for allgatherv",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_allgatherv, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_allgatherv, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/allreduce",
                      "Which collective to use for allreduce",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_allreduce, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_allreduce, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/alltoall",
                      "Which collective to use for alltoall",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_alltoall, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_alltoall, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/alltoallv",
                      "Which collective to use for alltoallv",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_alltoallv, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_alltoallv, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/bcast",
                      "Which collective to use for bcast",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_bcast, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_bcast, NULL);
 
     xbt_cfg_register(&_sg_cfg_set, "smpi/reduce",
                      "Which collective to use for reduce",
-                     xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__coll_reduce, NULL);
+                     xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_reduce, NULL);
 #endif // HAVE_SMPI
 
+    xbt_cfg_register(&_sg_cfg_set, "exception/cutpath",
+                     "\"yes\" or \"no\". \"yes\" will cut all path information from call traces, used e.g. in exceptions.",
+                     xbt_cfgelm_boolean, 1, 1, NULL, NULL);
+    xbt_cfg_setdefault_boolean(_sg_cfg_set, "exception/cutpath", "no");
+
     xbt_cfg_register(&_sg_cfg_set, "clean_atexit",
                      "\"yes\" or \"no\". \"yes\" enables all the cleanups of SimGrid (XBT,SIMIX,MSG) to be registered with atexit. \"no\" may be useful if your code segfaults when calling the exit function.",
                      xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb_clean_atexit, NULL);
@@ -804,12 +946,13 @@ void sg_config_init(int *argc, char **argv)
       /* retrieves the current directory of the current process */
       const char *initial_path = __surf_get_initial_path();
       xbt_assert((initial_path),
-                  "__surf_get_initial_path() failed! Can't resolves current Windows directory");
+                  "__surf_get_initial_path() failed! Can't resolve current Windows directory");
 
       surf_path = xbt_dynar_new(sizeof(char *), NULL);
       xbt_cfg_setdefault_string(_sg_cfg_set, "path", initial_path);
     }
 
+    xbt_cfg_check(_sg_cfg_set);
     _sg_cfg_init_status = 1;
 
     sg_config_cmd_line(argc, argv);
@@ -819,8 +962,6 @@ void sg_config_init(int *argc, char **argv)
   } else {
     XBT_WARN("Call to sg_config_init() after initialization ignored");
   }
-
-  xbt_free(description);
 }
 
 void sg_config_finalize(void)
@@ -832,103 +973,106 @@ void sg_config_finalize(void)
   _sg_cfg_init_status = 0;
 }
 
-/* Pick the right models for CPU, net and workstation, and call their model_init_preparse */
+/* Pick the right models for CPU, net and host, and call their model_init_preparse */
 void surf_config_models_setup()
 {
-  const char *workstation_model_name;
-  int workstation_id = -1;
+  const char *host_model_name;
+  const char *vm_model_name;
+  int host_id = -1;
+  int vm_id = -1;
   char *network_model_name = NULL;
   char *cpu_model_name = NULL;
   int storage_id = -1;
   char *storage_model_name = NULL;
 
-  workstation_model_name =
-      xbt_cfg_get_string(_sg_cfg_set, "workstation/model");
+  host_model_name = xbt_cfg_get_string(_sg_cfg_set, "host/model");
+  vm_model_name = xbt_cfg_get_string(_sg_cfg_set, "vm/model");
   network_model_name = xbt_cfg_get_string(_sg_cfg_set, "network/model");
   cpu_model_name = xbt_cfg_get_string(_sg_cfg_set, "cpu/model");
   storage_model_name = xbt_cfg_get_string(_sg_cfg_set, "storage/model");
 
   /* Check whether we use a net/cpu model differing from the default ones, in which case
-   * we should switch to the "compound" workstation model to correctly dispatch stuff to
+   * we should switch to the "compound" host model to correctly dispatch stuff to
    * the right net/cpu models.
    */
 
   if ((!xbt_cfg_is_default_value(_sg_cfg_set, "network/model") ||
        !xbt_cfg_is_default_value(_sg_cfg_set, "cpu/model")) &&
-      xbt_cfg_is_default_value(_sg_cfg_set, "workstation/model")) {
-    XBT_INFO("Switching workstation model to compound since you changed the network and/or cpu model(s)");
-    workstation_model_name = "compound";
-    xbt_cfg_set_string(_sg_cfg_set, "workstation/model", workstation_model_name);
+      xbt_cfg_is_default_value(_sg_cfg_set, "host/model")) {
+    host_model_name = "compound";
+    xbt_cfg_set_string(_sg_cfg_set, "host/model", host_model_name);
   }
 
-  XBT_DEBUG("Workstation model: %s", workstation_model_name);
-  workstation_id =
-      find_model_description(surf_workstation_model_description,
-                             workstation_model_name);
-  if (!strcmp(workstation_model_name, "compound")) {
+  XBT_DEBUG("host model: %s", host_model_name);
+  host_id = find_model_description(surf_host_model_description, host_model_name);
+  if (!strcmp(host_model_name, "compound")) {
     int network_id = -1;
     int cpu_id = -1;
 
     xbt_assert(cpu_model_name,
-                "Set a cpu model to use with the 'compound' workstation model");
+                "Set a cpu model to use with the 'compound' host model");
 
     xbt_assert(network_model_name,
-                "Set a network model to use with the 'compound' workstation model");
+                "Set a network model to use with the 'compound' host model");
+
+    if(surf_cpu_model_init_preparse){
+      surf_cpu_model_init_preparse();
+    } else {
+      cpu_id =
+          find_model_description(surf_cpu_model_description, cpu_model_name);
+      surf_cpu_model_description[cpu_id].model_init_preparse();
+    }
 
     network_id =
         find_model_description(surf_network_model_description,
                                network_model_name);
-    cpu_id =
-        find_model_description(surf_cpu_model_description, cpu_model_name);
-
-    surf_cpu_model_description[cpu_id].model_init_preparse();
     surf_network_model_description[network_id].model_init_preparse();
   }
 
-  XBT_DEBUG("Call workstation_model_init");
-  surf_workstation_model_description[workstation_id].model_init_preparse();
+  XBT_DEBUG("Call host_model_init");
+  surf_host_model_description[host_id].model_init_preparse();
+
+  XBT_DEBUG("Call vm_model_init");
+  vm_id = find_model_description(surf_vm_model_description, vm_model_name);
+  surf_vm_model_description[vm_id].model_init_preparse();
 
   XBT_DEBUG("Call storage_model_init");
   storage_id = find_model_description(surf_storage_model_description, storage_model_name);
   surf_storage_model_description[storage_id].model_init_preparse();
 
-  /* ********************************************************************* */
-  /* TUTORIAL: New model                                                   */
-  int new_model_id = -1;
-  char *new_model_name = NULL;
-  new_model_name = xbt_cfg_get_string(_sg_cfg_set, "new_model/model");
-  XBT_DEBUG("Call new model_init");
-  new_model_id = find_model_description(surf_new_model_description, new_model_name);
-  surf_new_model_description[new_model_id].model_init_preparse();
-  /* ********************************************************************* */
+}
+
+int sg_cfg_is_default_value(const char *name)
+{
+  return xbt_cfg_is_default_value(_sg_cfg_set, name);
 }
 
 int sg_cfg_get_int(const char* name)
 {
-  return xbt_cfg_get_int(_sg_cfg_set,name);
+  return xbt_cfg_get_int(_sg_cfg_set, name);
 }
 
 double sg_cfg_get_double(const char* name)
 {
-  return xbt_cfg_get_double(_sg_cfg_set,name);
+  return xbt_cfg_get_double(_sg_cfg_set, name);
 }
 
 char* sg_cfg_get_string(const char* name)
 {
-  return xbt_cfg_get_string(_sg_cfg_set,name);
+  return xbt_cfg_get_string(_sg_cfg_set, name);
 }
 
 int sg_cfg_get_boolean(const char* name)
 {
-  return xbt_cfg_get_boolean(_sg_cfg_set,name);
+  return xbt_cfg_get_boolean(_sg_cfg_set, name);
 }
 
 void sg_cfg_get_peer(const char *name, char **peer, int *port)
 {
-  xbt_cfg_get_peer(_sg_cfg_set,name, peer, port);
+  xbt_cfg_get_peer(_sg_cfg_set, name, peer, port);
 }
 
 xbt_dynar_t sg_cfg_get_dynar(const char* name)
 {
-  return xbt_cfg_get_dynar(_sg_cfg_set,name);
+  return xbt_cfg_get_dynar(_sg_cfg_set, name);
 }