From: navarro <navarro@caraja.(none)>
Date: Wed, 25 Jan 2012 10:36:00 +0000 (+0100)
Subject: Add configuration auto for contexts/nthreads and use the PROCESSOR_COUNT.
X-Git-Tag: exp_20120216~119^2~18
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/d9cce835f104d243b0fc0a42cfdb8314181000c9?hp=7c43893265ad505d5d13e44ab1bb4e10eeec6b15

Add configuration auto for contexts/nthreads and use the PROCESSOR_COUNT.
Default number is 1.
---

diff --git a/buildtools/Cmake/Modules/FindNbCore.cmake b/buildtools/Cmake/Modules/FindNbCore.cmake
index a3c1809176..4b3c5935f1 100644
--- a/buildtools/Cmake/Modules/FindNbCore.cmake
+++ b/buildtools/Cmake/Modules/FindNbCore.cmake
@@ -1,6 +1,6 @@
 if(NOT DEFINED PROCESSOR_COUNT)
-  # Unknown:
-  set(PROCESSOR_COUNT 0)
+  # Default:
+  set(PROCESSOR_COUNT 1)
 
   # Linux:
   set(cpuinfo_file "/proc/cpuinfo")
diff --git a/include/simix/context.h b/include/simix/context.h
index 137e374519..ce4def0ef6 100644
--- a/include/simix/context.h
+++ b/include/simix/context.h
@@ -101,7 +101,7 @@ XBT_PUBLIC(smx_process_t) SIMIX_process_from_PID(int PID);
 /* parallelism */
 XBT_INLINE int SIMIX_context_is_parallel(void);
 XBT_INLINE int SIMIX_context_get_nthreads(void);
-XBT_INLINE void SIMIX_context_set_nthreads(int nb_threads);
+XBT_INLINE void SIMIX_context_set_nthreads(char* str_nb_threads);
 XBT_INLINE int SIMIX_context_get_parallel_threshold(void);
 XBT_INLINE void SIMIX_context_set_parallel_threshold(int threshold);
 XBT_INLINE e_xbt_parmap_mode_t SIMIX_context_get_parallel_mode(void);
diff --git a/src/simix/smx_context.c b/src/simix/smx_context.c
index fed8f7fe3f..94746b7d91 100644
--- a/src/simix/smx_context.c
+++ b/src/simix/smx_context.c
@@ -136,7 +136,16 @@ XBT_INLINE int SIMIX_context_get_nthreads(void) {
  *
  * \param nb_threads the number of threads to use
  */
-XBT_INLINE void SIMIX_context_set_nthreads(int nb_threads) {
+XBT_INLINE void SIMIX_context_set_nthreads(char* str_nb_threads) {
+
+  int nb_threads;
+
+  if(!strcmp(str_nb_threads,"auto")){
+      nb_threads = PROCESSOR_COUNT;
+      XBT_DEBUG("Auto-setting threads to %d",nb_threads);
+  }
+  else
+    nb_threads = atoi(str_nb_threads);
 
   xbt_assert(nb_threads > 0, "Invalid number of parallel threads: %d", nb_threads);
 
diff --git a/src/surf/surf_config.c b/src/surf/surf_config.c
index ad2b55e52d..3f495f3e9d 100644
--- a/src/surf/surf_config.c
+++ b/src/surf/surf_config.c
@@ -226,7 +226,7 @@ static void _surf_cfg_cb_context_stack_size(const char *name, int pos)
 
 static void _surf_cfg_cb_contexts_nthreads(const char *name, int pos)
 {
-  SIMIX_context_set_nthreads(xbt_cfg_get_int(_surf_cfg_set, name));
+  SIMIX_context_set_nthreads(xbt_cfg_get_string(_surf_cfg_set, name));
 }
 
 static void _surf_cfg_cb_contexts_parallel_threshold(const char *name, int pos)
@@ -461,10 +461,10 @@ void surf_config_init(int *argc, char **argv)
                      _surf_cfg_cb_context_stack_size, NULL);
 
     /* number of parallel threads for user processes */
-    default_value_int = 1;
+    default_value = xbt_strdup("1");
     xbt_cfg_register(&_surf_cfg_set, "contexts/nthreads",
                      "Number of parallel threads used to execute user contexts",
-                     xbt_cfgelm_int, &default_value_int, 1, 1,
+                     xbt_cfgelm_string, &default_value, 1, 1,
                      _surf_cfg_cb_contexts_nthreads, NULL);
 
     /* minimal number of user contexts to be run in parallel */