Implement a dynamic parallel execution mode.

[simgrid.git] / src / simix / smx_context_raw.c

diff --git a/src/simix/smx_context_raw.c b/src/simix/smx_context_raw.c
index 2d62d5d..5282293 100644 (file)
--- a/src/simix/smx_context_raw.c
+++ b/src/simix/smx_context_raw.c
@@ -153,12 +153,12 @@ void raw_swapcontext(raw_stack_t* old, raw_stack_t new) {
 
 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
 
-static xbt_parmap_t parmap;
-
 #ifdef CONTEXT_THREADS
-static __thread smx_context_t current_context;
+static xbt_parmap_t parmap;
 #endif
 
+static smx_context_factory_t raw_factory;
+
 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context);
 
 static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory)
@@ -200,7 +200,6 @@ smx_ctx_raw_create_context(xbt_main_func_t code, int argc, char **argv,
 
      }else{
        maestro_raw_context = context;
-       current_context = (smx_context_t) maestro_raw_context;
      }
 
      return (smx_context_t) context;
@@ -242,51 +241,58 @@ static void smx_ctx_raw_wrapper(smx_ctx_raw_t context)
   smx_ctx_raw_stop((smx_context_t) context);
 }
 
-static void smx_ctx_raw_resume(smx_context_t context)
+static void smx_ctx_raw_resume(smx_process_t process)
 {
-  smx_current_context = context; 
+  smx_ctx_raw_t context = (smx_ctx_raw_t)process->context;
+  smx_current_context = (smx_context_t)context;
   raw_swapcontext(
       &((smx_ctx_raw_t) context)->old_stack_top,
       ((smx_ctx_raw_t) context)->stack_top);
 }
 
-static void smx_ctx_raw_runall(xbt_dynar_t processes)
+
+static void smx_ctx_raw_runall_serial(xbt_dynar_t processes)
 {
   smx_process_t process;
   unsigned int cursor;
 
   xbt_dynar_foreach(processes, cursor, process) {
     DEBUG2("Schedule item %u of %lu",cursor,xbt_dynar_length(processes));
-    smx_ctx_raw_resume(process->context);
+    smx_ctx_raw_resume(process);
   }
   xbt_dynar_reset(processes);
 }
 
-static void smx_ctx_raw_resume_parallel(smx_process_t process)
-{
-  smx_ctx_raw_t context = (smx_ctx_raw_t)process->context;
-  current_context = (smx_context_t)context;
-  raw_swapcontext(
-      &context->old_stack_top,
-      context->stack_top);
-  current_context = (smx_context_t)maestro_raw_context;
-}
-
 static void smx_ctx_raw_runall_parallel(xbt_dynar_t processes)
 {
-  xbt_parmap_apply(parmap, (void_f_pvoid_t)smx_ctx_raw_resume_parallel, processes);
+  xbt_parmap_apply(parmap, (void_f_pvoid_t)smx_ctx_raw_resume, processes);
   xbt_dynar_reset(processes);
 }
 
 static smx_context_t smx_ctx_raw_self_parallel(void)
 {
-  return current_context;
+  return smx_current_context;
 }
 
 static int smx_ctx_raw_get_thread_id(){
   return (int)(unsigned long)xbt_os_thread_get_extra_data();
 }
 
+static void smx_ctx_raw_runall(xbt_dynar_t processes)
+{
+  if(xbt_dynar_length(processes) > 10){
+    DEBUG1("Runall // %lu", xbt_dynar_length(processes));
+    raw_factory->self = smx_ctx_raw_self_parallel;
+    raw_factory->get_thread_id = smx_ctx_raw_get_thread_id;
+    smx_ctx_raw_runall_parallel(processes);
+  }else{
+    DEBUG1("Runall serial %lu", xbt_dynar_length(processes));
+    raw_factory->self = smx_ctx_base_self;
+    raw_factory->get_thread_id = smx_ctx_base_get_thread_id;
+    smx_ctx_raw_runall_serial(processes);
+  }
+}
+
 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
 {
   VERB0("Using raw contexts. Because the glibc is just not good enough for us.");
@@ -299,11 +305,11 @@ void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
   (*factory)->stop = smx_ctx_raw_stop;
   (*factory)->suspend = smx_ctx_raw_suspend;
   (*factory)->name = "smx_raw_context_factory";
+  (*factory)->runall = smx_ctx_raw_runall;
 
   if (SIMIX_context_is_parallel()) {
 #ifdef CONTEXT_THREADS  /* To use parallel ucontexts a thread pool is needed */
     parmap = xbt_parmap_new(2);
-    (*factory)->runall = smx_ctx_raw_runall_parallel;
     (*factory)->self = smx_ctx_raw_self_parallel;
     (*factory)->get_thread_id = smx_ctx_raw_get_thread_id;
 #else
@@ -312,4 +318,6 @@ void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
   } else {
     (*factory)->runall = smx_ctx_raw_runall;
   }
+
+  raw_factory = *factory;
 }