4 files changed, 24 insertions, 14 deletions

diff --git a/sim/debug.cc b/sim/debug.cc
index 09c604a95..b73ab4245 100644
--- a/sim/debug.cc
+++ b/sim/debug.cc
@@ -40,11 +40,13 @@
 
 using namespace std;
 
+#ifdef DEBUG
 void
 debug_break()
 {
     kill(getpid(), SIGTRAP);
 }
+#endif
 
 //
 // Debug event: place a breakpoint on the process function and
diff --git a/sim/debug.hh b/sim/debug.hh
index eb0be772e..a4f8b8702 100644
--- a/sim/debug.hh
+++ b/sim/debug.hh
@@ -29,6 +29,10 @@
 #ifndef __DEBUG_HH__
 #define __DEBUG_HH__
 
+#ifdef DEBUG
 void debug_break();
+#else
+inline void debug_break() { }
+#endif
 
 #endif // __DEBUG_HH__
diff --git a/sim/stat_control.cc b/sim/stat_control.cc
index d6d7e2c91..c7d2fdd5b 100644
--- a/sim/stat_control.cc
+++ b/sim/stat_control.cc
@@ -39,6 +39,7 @@
 #include "base/str.hh"
 #include "base/time.hh"
 #include "base/stats/output.hh"
+#include "cpu/base_cpu.hh"
 #include "sim/eventq.hh"
 #include "sim/sim_object.hh"
 #include "sim/stat_control.hh"
@@ -47,13 +48,14 @@
 using namespace std;
 
 Statistics::Formula hostInstRate;
-Statistics::Formula hostMemory;
-Statistics::Formula hostSeconds;
 Statistics::Formula hostTickRate;
+Statistics::Value hostMemory;
+Statistics::Value hostSeconds;
 
-Statistics::Formula simInsts;
+Statistics::Value simTicks;
+Statistics::Value simInsts;
+Statistics::Value simFreq;
 Statistics::Formula simSeconds;
-Statistics::Formula simTicks;
 
 namespace Statistics {
 
@@ -84,6 +86,7 @@ void
 InitSimStats()
 {
     simInsts
+        .functor(BaseCPU::numSimulatedInstructions)
         .name("sim_insts")
         .desc("Number of instructions simulated")
         .precision(0)
@@ -95,7 +98,14 @@ InitSimStats()
         .desc("Number of seconds simulated")
         ;
 
+    simFreq
+        .scalar(ticksPerSecond)
+        .name("sim_freq")
+        .desc("Frequency of simulated ticks")
+        ;
+
     simTicks
+        .scalar(curTick)
         .name("sim_ticks")
         .desc("Number of ticks simulated")
         ;
@@ -108,12 +118,14 @@ InitSimStats()
         ;
 
     hostMemory
+        .functor(memUsage)
         .name("host_mem_usage")
         .desc("Number of bytes of host memory used")
         .prereq(hostMemory)
         ;
 
     hostSeconds
+        .functor(statElapsedTime)
         .name("host_seconds")
         .desc("Real time elapsed on the host")
         .precision(2)
@@ -125,11 +137,7 @@ InitSimStats()
         .precision(0)
         ;
 
-    simInsts = constant(0);
-    simTicks = scalar(curTick) - scalar(startTick);
-    simSeconds = simTicks / scalar(ticksPerSecond);
-    hostMemory = functor(memUsage);
-    hostSeconds = functor(statElapsedTime);
+    simSeconds = simTicks / simFreq;
     hostInstRate = simInsts / hostSeconds;
     hostTickRate = simTicks / hostSeconds;
 
diff --git a/sim/stats.hh b/sim/stats.hh
index b736850e7..c5e791cfb 100644
--- a/sim/stats.hh
+++ b/sim/stats.hh
@@ -31,11 +31,7 @@
 
 #include "base/statistics.hh"
 
-extern Statistics::Formula simTicks;
 extern Statistics::Formula simSeconds;
-extern Statistics::Formula simInsts;
-extern Statistics::Formula hostSeconds;
-extern Statistics::Formula hostTickRate;
-extern Statistics::Formula hostInstRate;
+extern Statistics::Value simTicks;
 
 #endif // __SIM_SIM_STATS_HH__