Initial steps in stats tree building. Almost done, but something is fishy
diff --git a/utils/load-stats.cc b/utils/load-stats.cc
new file mode 100644
index 0000000..ee61df4
--- /dev/null
+++ b/utils/load-stats.cc
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#include "load-stats.h"
+
+using namespace ns3;
+
+const double EXP_1 = exp (-5.0/60.0); /* 1/exp(5sec/1min) */
+const double EXP_5 = exp (-5.0/300.0); /* 1/exp(5sec/5min) */
+const double EXP_15 = exp (-5.0/900.0); /* 1/exp(5sec/15min) */
+
+const double EPSILON = 0.000001;
+
+namespace ndnSIM
+{
+
+LoadStats::LoadStats ()
+ : counter_ (0)
+ , avg1_ (0)
+ , avg5_ (0)
+ , avg15_ (0)
+{
+}
+
+void
+LoadStats::Step ()
+{
+ // do magic
+ avg1_ = EXP_1 * avg1_ + (1 - EXP_1) * counter_;
+ avg5_ = EXP_1 * avg5_ + (1 - EXP_5) * counter_;
+ avg15_ = EXP_1 * avg15_ + (1 - EXP_15) * counter_;
+
+ counter_ = 0;
+}
+
+LoadStats &
+LoadStats::operator ++ (int)
+{
+ counter_ ++;
+ return *this;
+}
+
+// void
+// LoadStats::Increment (uint32_t amount)
+// {
+// counter_ += amount;
+// }
+
+// uint32_t
+// LoadStats::GetCounter () const
+// {
+// return counter_;
+// }
+
+LoadStats &
+LoadStats::operator += (const LoadStats &stats)
+{
+ counter_ += stats.counter_;
+ return *this;
+}
+
+LoadStats::stats_tuple
+LoadStats::GetStats () const
+{
+ return stats_tuple (avg1_, avg5_, avg15_);
+}
+
+bool
+LoadStats::IsEmpty () const
+{
+ return (avg1_ < EPSILON &&
+ avg5_ < EPSILON &&
+ avg15_ < EPSILON);
+}
+
+std::ostream &
+operator << (std::ostream &os, const LoadStats &stats)
+{
+ LoadStats::stats_tuple data = stats.GetStats ();
+ os << data.get<0> () << ", " << data.get<1> () << ", " << data.get<2> ();// << std::endl;
+ return os;
+}
+
+} // ndnSIM