profiling: Allow limiting statisics just to picking

This suspends and resumes all uprof timers and counters except while dealing
with picking, so as to give more focused statistics.

Be aware that there are still some issues with this profile option since
there are a few special case counters and timers that shouldn't be
suspended; noteably the frame counters are incorrect so the per frame stats
can't be trusted.

clutter/clutter-main.c

@@ -168,6 +168,7 @@ static const GDebugKey clutter_debug_keys[] = {
 
 #ifdef CLUTTER_ENABLE_PROFILE
 static const GDebugKey clutter_profile_keys[] = {
+      {"picking-only", CLUTTER_PROFILE_PICKING_ONLY },
       {"disable-report", CLUTTER_PROFILE_DISABLE_REPORT }
 };
 #endif /* CLUTTER_ENABLE_DEBUG */
@@ -574,6 +575,11 @@ _clutter_do_pick (ClutterStage   *stage,
   if (clutter_debug_flags & CLUTTER_DEBUG_NOP_PICKING)
     return CLUTTER_ACTOR (stage);
 
+#ifdef CLUTTER_ENABLE_PROFILE
+  if (clutter_profile_flags & CLUTTER_PROFILE_PICKING_ONLY)
+    _clutter_profile_resume ();
+#endif /* CLUTTER_ENABLE_PROFILE */
+
   CLUTTER_COUNTER_INC (_clutter_uprof_context, do_pick_counter);
   CLUTTER_TIMER_START (_clutter_uprof_context, pick_timer);
 
@@ -636,15 +642,22 @@ _clutter_do_pick (ClutterStage   *stage,
 
   if (pixel[0] == 0xff && pixel[1] == 0xff && pixel[2] == 0xff)
     {
-      CLUTTER_TIMER_STOP (_clutter_uprof_context, pick_timer);
-      return CLUTTER_ACTOR (stage);
+      actor = CLUTTER_ACTOR (stage);
+      goto result;
     }
 
   id = _clutter_pixel_to_id (pixel);
   actor = clutter_get_actor_by_gid (id);
 
+result:
+
   CLUTTER_TIMER_STOP (_clutter_uprof_context, pick_timer);
 
+#ifdef CLUTTER_ENABLE_PROFILE
+  if (clutter_profile_flags & CLUTTER_PROFILE_PICKING_ONLY)
+    _clutter_profile_suspend ();
+#endif
+
   return actor;
 }
 
@@ -1528,6 +1541,11 @@ clutter_init_real (GError **error)
   /* - will call to backend and cogl */
   _clutter_feature_init ();
 
+#ifdef CLUTTER_ENABLE_PROFILE
+  if (clutter_profile_flags & CLUTTER_PROFILE_PICKING_ONLY)
+    _clutter_profile_suspend ();
+#endif
+
   /*
    * Resolution requires display to be open, so can only be queried after
    * the post_parse hooks run.

clutter/clutter-profile.c

@@ -8,6 +8,9 @@
 UProfContext *_clutter_uprof_context;
 #define REPORT_COLUMN0_WIDTH 40
 
+static gboolean searched_for_gl_uprof_context = FALSE;
+static UProfContext *gl_uprof_context = NULL;
+
 typedef struct _ClutterUProfReportState
 {
   gulong n_frames;
@@ -166,5 +169,31 @@ clutter_uprof_destructor (void)
   uprof_context_unref (_clutter_uprof_context);
 }
 
+void
+_clutter_profile_suspend (void)
+{
+  if (G_UNLIKELY (!searched_for_gl_uprof_context))
+    {
+      gl_uprof_context = uprof_find_context ("OpenGL");
+      searched_for_gl_uprof_context = TRUE;
+    }
+
+  if (gl_uprof_context)
+    uprof_context_suspend (gl_uprof_context);
+
+  /* NB: The Cogl context is linked to this so it will also be suspended... */
+  uprof_context_suspend (_clutter_uprof_context);
+}
+
+void
+_clutter_profile_resume (void)
+{
+  if (gl_uprof_context)
+    uprof_context_resume (gl_uprof_context);
+
+  /* NB: The Cogl context is linked to this so it will also be resumed... */
+  uprof_context_resume (_clutter_uprof_context);
+}
+
 #endif
 

clutter/clutter-profile.h

@@ -31,6 +31,7 @@
 G_BEGIN_DECLS
 
 typedef enum {
+  CLUTTER_PROFILE_PICKING_ONLY    = 1 << 0,
   CLUTTER_PROFILE_DISABLE_REPORT  = 1 << 1
 } ClutterProfileFlag;
 
@@ -47,6 +48,11 @@ extern UProfContext *_clutter_uprof_context;
 #define CLUTTER_TIMER_START     UPROF_TIMER_START
 #define CLUTTER_TIMER_STOP      UPROF_TIMER_STOP
 
+void
+_clutter_profile_suspend (void);
+void
+_clutter_profile_resume (void);
+
 #else /* CLUTTER_ENABLE_PROFILE */
 
 #define CLUTTER_STATIC_TIMER(A,B,C,D,E) extern void _clutter_dummy_decl (void)
@@ -56,6 +62,9 @@ extern UProfContext *_clutter_uprof_context;
 #define CLUTTER_TIMER_START(A,B) G_STMT_START{ (void)0; }G_STMT_END
 #define CLUTTER_TIMER_STOP(A,B) G_STMT_START{ (void)0; }G_STMT_END
 
+#define _clutter_profile_suspend() G_STMT_START {} G_STMT_END
+#define _clutter_profile_resume() G_STMT_START {} G_STMT_END
+
 #endif /* CLUTTER_ENABLE_PROFILE */
 
 extern guint clutter_profile_flags;