benchmark silo added

[c11concurrency-benchmarks.git] / silo / masstree / kvstats.hh

diff --git a/silo/masstree/kvstats.hh b/silo/masstree/kvstats.hh
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+/* Masstree
+ * Eddie Kohler, Yandong Mao, Robert Morris
+ * Copyright (c) 2012-2013 President and Fellows of Harvard College
+ * Copyright (c) 2012-2013 Massachusetts Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, subject to the conditions
+ * listed in the Masstree LICENSE file. These conditions include: you must
+ * preserve this copyright notice, and you cannot mention the copyright
+ * holders in advertising related to the Software without their permission.
+ * The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
+ * notice is a summary of the Masstree LICENSE file; the license in that file
+ * is legally binding.
+ */
+#ifndef KVSTATS_HH
+#define KVSTATS_HH 1
+#include <stdlib.h>
+
+struct kvstats {
+  double min, max, sum, sumsq;
+  long count;
+  kvstats()
+    : min(-1), max(-1), sum(0), sumsq(0), count(0) {
+  }
+  void add(double x) {
+    if (!count || x < min)
+      min = x;
+    if (max < x)
+      max = x;
+    sum += x;
+    sumsq += x * x;
+    count += 1;
+  }
+  typedef void (kvstats::*unspecified_bool_type)(double);
+  operator unspecified_bool_type() const {
+    return count ? &kvstats::add : 0;
+  }
+  void print_report(const char *name) const {
+    if (count)
+      printf("%s: n %ld, total %.0f, average %.0f, min %.0f, max %.0f, stddev %.0f\n",
+            name, count, sum, sum / count, min, max,
+            sqrt((sumsq - sum * sum / count) / (count - 1)));
+  }
+  double avg() {
+    if (count)
+      return sum / count;
+    else
+      return 0;
+  }
+};
+
+#endif