From 38226af24ec01e8f0a20d7fd73ef838a69f6ef25 Mon Sep 17 00:00:00 2001
From: ThorstenB <brehmt@gmail.com>
Date: Wed, 23 Mar 2011 23:09:02 +0100
Subject: [PATCH] Improve timing statistics Enable/disable and print statistics
 at run-time. Configurable intervals and filters.

---
 src/Main/main.cxx | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index 677d0f36b..33bb062bb 100644
--- a/src/Main/main.cxx
+++ b/src/Main/main.cxx
@@ -121,6 +121,15 @@ static void fgMainLoop( void ) {
     static SGPropertyNode_ptr frame_signal
         = fgGetNode("/sim/signals/frame", true);
 
+    static SGPropertyNode_ptr _statisticsFlag
+        = fgGetNode("/sim/timing-statistics/enabled", true);
+    static SGPropertyNode_ptr _statisticsInterval
+        = fgGetNode("/sim/timing-statistics/interval-s", true);
+    static SGPropertyNode_ptr _statiticsMinJitter
+        = fgGetNode("/sim/timing-statistics/min-jitter-ms", true);
+    static SGPropertyNode_ptr _statiticsMinTime
+        = fgGetNode("/sim/timing-statistics/min-time-ms", true);
+
     frame_signal->fireValueChanged();
     SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
     
@@ -206,6 +215,28 @@ static void fgMainLoop( void ) {
             simgear::sleepForMSec(500);
         }
     }
+
+    // print timing statistics
+    static bool _lastStatisticsFlag = false;
+    if (_lastStatisticsFlag != _statisticsFlag->getBoolValue())
+    {
+        // flag has changed, update subsystem manager
+        _lastStatisticsFlag = _statisticsFlag->getBoolValue();
+        globals->get_subsystem_mgr()->collectDebugTiming(_lastStatisticsFlag);
+    }
+    if (_lastStatisticsFlag)
+    {
+        static double elapsed = 0;
+        elapsed += real_dt;
+        if (elapsed >= _statisticsInterval->getDoubleValue())
+        {
+            // print and reset timing statistics
+            globals->get_subsystem_mgr()->printTimingStatistics(_statiticsMinTime->getDoubleValue(),
+                                                                _statiticsMinJitter->getDoubleValue());
+            elapsed = 0;
+        }
+    }
+
     simgear::AtomicChangeListener::fireChangeListeners();
 
     SG_LOG( SG_ALL, SG_DEBUG, "" );
-- 
2.39.5