diff --git a/Implab/Diagnostics/LogChannel.cs b/Implab/Diagnostics/LogChannel.cs
--- a/Implab/Diagnostics/LogChannel.cs
+++ b/Implab/Diagnostics/LogChannel.cs
@@ -20,5 +20,11 @@ namespace Implab.Diagnostics {
             if (t!= null)
                 t(TraceContext.Current,new ValueEventArgs<TEvent>(data));
         }
+
+        public void LogEvent(TraceContext context,TEvent data) {
+            var t = Events;
+            if (t != null)
+                t(context, new ValueEventArgs<TEvent>(data));
+        }
     }
 }
diff --git a/Implab/Diagnostics/TraceContext.cs b/Implab/Diagnostics/TraceContext.cs
--- a/Implab/Diagnostics/TraceContext.cs
+++ b/Implab/Diagnostics/TraceContext.cs
@@ -34,7 +34,7 @@ namespace Implab.Diagnostics {
             m_traceBound = context.CurrentOperation;
             m_threadId = Thread.CurrentThread.ManagedThreadId;
 
-            LogEvent(TraceEventType.Transfer, String.Empty);
+            LogEvent(TraceEventType.Transfer, "FORK {0}", context.ThreadId);
         }
 
         TraceContext() {
@@ -91,7 +91,7 @@ namespace Implab.Diagnostics {
         }
 
         void LogEvent(TraceEventType type, string format, params object[] args) {
-            LogChannel<TraceEvent>.Default.LogEvent(TraceEvent.Create(type, format, args));
+            LogChannel<TraceEvent>.Default.LogEvent(this, TraceEvent.Create(type, format, args));
         }
     }
 }