diff -r 9eb01ff3c4fc -r 68ea5c8f8d6c src/python/m5/stats/__init__.py
--- a/src/python/m5/stats/__init__.py	Thu Apr 25 13:04:24 2013 +0100
+++ b/src/python/m5/stats/__init__.py	Thu Apr 25 13:04:24 2013 +0100
@@ -213,22 +213,6 @@
 
     return None
 
-## @brief A proxy used to store the value of a statistic and the information
-# about it.
-class ValueProxy(object):
-    ## @brief Constructor.
-    # @param info The information about the stat.
-    # @param value The value if the stat.
-    def __init__(self, info, value):
-        self._info = info
-        self.value = value
-
-    def __getattr__(self, attr):
-        return getattr(self._info, attr)
-
-    def __nonzero__(self):
-        return
-
 ## @brief Get all of the stats from the C++ into the python. Loop over each
 # registered stat and call stat.info which returns all information about the
 # statistic.
@@ -238,7 +222,10 @@
     for stat in sim_stats:
         value = convert_value(stat)
         info = stat.info
-        stats.append(ValueProxy(info, value))
+        info.value = value
+        if stat.info.type in ('VectorInfo', 'FormulaInfo'):
+            info.total = stat.total()
+        stats.append(info)
     return stats
 
 ## @brief Convert from C++ stats to python stats, and store as a context.
diff -r 9eb01ff3c4fc -r 68ea5c8f8d6c src/python/m5/stats/display.py
--- a/src/python/m5/stats/display.py	Thu Apr 25 13:04:24 2013 +0100
+++ b/src/python/m5/stats/display.py	Thu Apr 25 13:04:24 2013 +0100
@@ -171,9 +171,15 @@
             p.display(out)
             return
 
-        mytotal = sum( x for x in self.value if not isnan(x) )
-        if isnan(mytotal):
-            mytotal = 0
+        # Don't recalculate the total if we already have it. In this
+        # case it has already been calculated in C++ and passed into
+        # the python via SWIG.
+        if hasattr(self, "total"):
+            mytotal = self.total
+        else:
+            mytotal = sum( x for x in self.value if not isnan(x) )
+            if isnan(mytotal):
+                mytotal = 0
 
         mycdf = 0.0
 
@@ -235,10 +241,8 @@
             p.display(out)
             return
 
-        mytotal = self.total
-        mycdf = 0.0
+        value = self.value
 
-        value = self.value
         if any(self.subnames):
             subnames = [''] * len(value)
             for i,subname in enumerate(self.subnames):
@@ -253,22 +257,35 @@
                 if self.subdescs[i]:
                     subdescs[i] = self.subdescs[i]
 
-        for val,sname,sdesc in map(None, value, subnames, subdescs):
-            if mytotal > 0.0:
+        mytotal = self.total
+        mycdf = 0.0
+
+        # If the total is greater than zero, we print out the elements of the
+        # stat.
+        if mytotal > 0.0:
+            for val,sname,sdesc in map(None, value, subnames, subdescs):
                 mypdf = float(val) / float(mytotal)
                 mycdf += mypdf
+
+                # If there are no subnames, then continue to next iteration
+                # without printing the stats.
+                if not sname:
+                    continue
+
+                # Check if we should be printing the PDF (and therefore also the
+                # CDF).
                 if (self.flags & flags.pdf):
                     p.pdf = mypdf
                     p.cdf = mycdf
 
-            if not sname:
-                continue
+                # Append the subname to the name of the stat, and write it to
+                # the output file.
+                p.name = self.name + sname
+                p.desc = sdesc
+                p.value = val
+                p.display(out)
 
-            p.name = self.name + sname
-            p.desc = sdesc
-            p.value = val
-            p.display(out)
-
+        # Check if we should print the total.
         if self.flags & flags.total:
             p.reset()
             p.name = self.name + '::total'
@@ -408,7 +425,7 @@
         p.value = value(stat, 0)
     else:
         p = VectorDisplay(stat)
-        p.value = [ value(stat, i) for i in xrange(len(stat)) ]
+        p.value = stat.value
     p.display(out)
 
 @register_display(Formula)
@@ -421,10 +438,16 @@
     elif vector(stat):
         if len(stat) == 1:
             p = Display(stat)
-            p.value = value(stat, 0)
+            try:
+                p.value = stat.value[0]
+            except (AttributeError, IndexError):
+                p.value = value(stat, 0)
         else:
             p = VectorFormulaDisplay(stat)
-            p.value = [ value(stat, i) for i in xrange(len(stat)) ]
+            try:
+                p.value = stat.value
+            except AttributeError:
+                p.value = [ value(stat, i) for i in xrange(len(stat)) ]
         p.display(out)
 
 @register_display(Dist)
diff -r 9eb01ff3c4fc -r 68ea5c8f8d6c src/python/m5/stats/info.py
--- a/src/python/m5/stats/info.py	Thu Apr 25 13:04:24 2013 +0100
+++ b/src/python/m5/stats/info.py	Thu Apr 25 13:04:24 2013 +0100
@@ -61,7 +61,6 @@
 # @return True if stat is a scalar, False otherwise.
 def scalar(stat):
     stat = unproxy(stat)
-    assert(stat.__scalar__() != stat.__vector__())
     return stat.__scalar__()
 
 ## @brief Test if a stat is a vector.
@@ -69,7 +68,6 @@
 # @return True if stat is a vector, False otherwise.
 def vector(stat):
     stat = unproxy(stat)
-    assert(stat.__scalar__() != stat.__vector__())
     return stat.__vector__()
 
 ## @brief Get the value of a (scalar) stat.
@@ -636,7 +634,7 @@
             return self.total
 
         # Return the properties of the value.
-        if attr in ('__scalar__', '__vector__', '__value__', '__len__'):
+        elif attr in ('__scalar__', '__vector__', '__value__', '__len__'):
             return getattr(self._the_value, attr)
 
         return super(Formula, self).__getattr__(attr)