opal timing: added ability to choose the timer type

ompi/runtime/ompi_mpi_finalize.c

@@ -99,7 +99,7 @@ int ompi_mpi_finalize(void)
     ompi_proc_t** procs;
     size_t nprocs;
     OPAL_TIMING_DECLARE(tm);
-    OPAL_TIMING_INIT(&tm);
+    OPAL_TIMING_INIT_EXT(&tm, OPAL_TIMING_GET_TIME_OF_DAY);
 
 
     /* Be a bit social if an erroneous program calls MPI_FINALIZE in

ompi/runtime/ompi_mpi_init.c

@@ -388,7 +388,7 @@ int ompi_mpi_init(int argc, char **argv, int requested, int *provided)
     char *error = NULL;
     char *cmd=NULL, *av=NULL;
     OPAL_TIMING_DECLARE(tm);
-    OPAL_TIMING_INIT(&tm);
+    OPAL_TIMING_INIT_EXT(&tm, OPAL_TIMING_GET_TIME_OF_DAY);
 
     /* bitflag of the thread level support provided. To be used
      * for the modex in order to work in heterogeneous environments. */

opal/util/timings.c

@@ -59,10 +59,6 @@ struct interval_descr{
     double interval, overhead;
 };
 
-opal_timing_event_t *opal_timing_event_alloc(opal_timing_t *t);
-void opal_timing_init(opal_timing_t *t);
-opal_timing_prep_t opal_timing_prep_ev(opal_timing_t *t, const char *fmt, ...);
-
 static OBJ_CLASS_INSTANCE(opal_timing_event_t, opal_list_item_t, NULL, NULL);
 
 
@@ -165,26 +161,45 @@ static double get_ts_cycle(void)
 {
         return ((double) opal_timer_base_get_cycles()) / opal_timer_base_get_freq();
 }
-#elif OPAL_TIMER_USEC_NATIVE
+#endif
+
+#if OPAL_TIMER_USEC_NATIVE
 static double get_ts_usec(void)
 {
         return ((double) opal_timer_base_get_usec()) / 1000000.0;
 }
 #endif
 
-static get_ts_t _init_timestamping(void)
+static get_ts_t _init_timestamping(opal_timer_type_t type)
 {
-    if( !opal_initialized ){
-        return get_ts_gettimeofday;
-    }
-#if OPAL_TIMER_CYCLE_NATIVE
-        return get_ts_cycle;
-#elif OPAL_TIMER_USEC_NATIVE
-        return get_ts_usec;
-#endif
-    return get_ts_gettimeofday;
-}
+    switch (type) {
+        case OPAL_TIMING_GET_TIME_OF_DAY:
+            return get_ts_gettimeofday;
 
+        case OPAL_TIMING_CYCLE_NATIVE:
+#if OPAL_TIMER_CYCLE_NATIVE
+           return get_ts_cycle;
+#else
+           return NULL;
+#endif // OPAL_TIMER_CYCLE_NATIVE
+        case OPAL_TIMING_USEC_NATIVE:
+#if OPAL_TIMER_USEC_NATIVE
+            return get_ts_usec;
+#else
+            return NULL;
+#endif // OPAL_TIMER_USEC_NATIVE
+        default:
+            if( !opal_initialized ){
+                return get_ts_gettimeofday;
+            }
+#if OPAL_TIMER_CYCLE_NATIVE
+            return get_ts_cycle;
+#elif OPAL_TIMER_USEC_NATIVE
+            return get_ts_usec;
+#endif
+            return get_ts_gettimeofday;
+    }
+}
 
 opal_timing_event_t *opal_timing_event_alloc(opal_timing_t *t)
 {
@@ -209,7 +224,7 @@ opal_timing_event_t *opal_timing_event_alloc(opal_timing_t *t)
     return t->buffer + tmp;
 }
 
-void opal_timing_init(opal_timing_t *t)
+int opal_timing_init(opal_timing_t *t, opal_timer_type_t type)
 {
     memset(t,0,sizeof(*t));
 
@@ -223,8 +238,11 @@ void opal_timing_init(opal_timing_t *t)
      * will be allocated at first event report */
     t->buffer_offset = t->buffer_size;
     /* initialize gettime function */
-    t->get_ts = _init_timestamping();
-
+    t->get_ts = _init_timestamping(type);
+    if (NULL == t->get_ts) {
+        return OPAL_ERR_BAD_PARAM;
+    }
+    return OPAL_SUCCESS;
 }
 
 opal_timing_prep_t opal_timing_prep_ev(opal_timing_t *t, const char *fmt, ...)

opal/util/timings.h

@@ -16,6 +16,13 @@
 #include "opal/class/opal_list.h"
 #include "opal/runtime/opal_params.h"
 
+typedef enum {
+    OPAL_TIMING_AUTOMATIC_TIMER,
+    OPAL_TIMING_GET_TIME_OF_DAY,
+    OPAL_TIMING_CYCLE_NATIVE,
+    OPAL_TIMING_USEC_NATIVE
+} opal_timer_type_t;
+
 #if OPAL_ENABLE_TIMING
 
 #define OPAL_TIMING_DESCR_MAX 1024
@@ -94,7 +101,7 @@ int opal_timing_set_jobid(char *jid);
  * @retval OPAL_SUCCESS On success
  * @retval OPAL_ERROR On failure
  */
-void opal_timing_init(opal_timing_t *t);
+int opal_timing_init(opal_timing_t *t, opal_timer_type_t type);
 
 /**
  * Prepare timing event, do all printf-like processing.
@@ -278,7 +285,16 @@ void opal_timing_release(opal_timing_t *t);
  *
  * @see opal_timing_init()
  */
-#define OPAL_TIMING_INIT(t) opal_timing_init(t)
+#define OPAL_TIMING_INIT(t) opal_timing_init(t, OPAL_TIMING_AUTOMATIC_TIMER)
+
+/**
+ * Main macro for use in initializing opal timing handler;
+ * will be "compiled out" when OPAL is configured without
+ * --enable-timing.
+ *
+ * @see opal_timing_init()
+ */
+#define OPAL_TIMING_INIT_EXT(t, type) opal_timing_init(t, type)
 
 /**
  * Macro that enqueues event with its description to the specified
@@ -408,6 +424,8 @@ void opal_timing_release(opal_timing_t *t);
 
 #define OPAL_TIMING_INIT(t)
 
+#define OPAL_TIMING_INIT_EXT(t, type)
+
 #define OPAL_TIMING_EVENT(x)
 
 #define OPAL_TIMING_MDESCR(x)