diff -r 4ac8bc60c000 xen/common/schedule.c
--- a/xen/common/schedule.c	Tue Feb 10 05:51:00 2009 +0000
+++ b/xen/common/schedule.c	Fri Feb 13 13:47:35 2009 +0000
@@ -79,6 +79,20 @@
     event |= ( new_state & 0x3 ) << 4;
 
     __trace_var(event, 1/*tsc*/, sizeof(d), (unsigned char *)&d);
+}
+
+static inline void trace_continue_running(struct vcpu *v)
+{
+    struct { uint32_t vcpu:16, domain:16; } d;
+
+    if ( likely(!tb_init_done) )
+        return;
+
+    d.vcpu = v->vcpu_id;
+    d.domain = v->domain->domain_id;
+
+    __trace_var(TRC_SCHED_CONTINUE_RUNNING, 1/*tsc*/, sizeof(d),
+                (unsigned char *)&d);
 }
 
 static inline void vcpu_runstate_change(
@@ -803,6 +817,7 @@
     if ( unlikely(prev == next) )
     {
         spin_unlock_irq(&sd->schedule_lock);
+        trace_continue_running(next);
         return continue_running(prev);
     }
 
diff -r 4ac8bc60c000 xen/include/public/trace.h
--- a/xen/include/public/trace.h	Tue Feb 10 05:51:00 2009 +0000
+++ b/xen/include/public/trace.h	Fri Feb 13 13:47:35 2009 +0000
@@ -60,7 +60,8 @@
 #define TRC_TRACE_WRAP_BUFFER  (TRC_GEN + 2)
 #define TRC_TRACE_CPU_CHANGE    (TRC_GEN + 3)
 
-#define TRC_SCHED_RUNSTATE_CHANGE (TRC_SCHED_MIN + 1)
+#define TRC_SCHED_RUNSTATE_CHANGE   (TRC_SCHED_MIN + 1)
+#define TRC_SCHED_CONTINUE_RUNNING  (TRC_SCHED_MIN + 2)
 #define TRC_SCHED_DOM_ADD        (TRC_SCHED_VERBOSE +  1)
 #define TRC_SCHED_DOM_REM        (TRC_SCHED_VERBOSE +  2)
 #define TRC_SCHED_SLEEP          (TRC_SCHED_VERBOSE +  3)