Metric.cpp revision 08257e457b2aab6453618cb64c033e5a64115da1 
1//===-- Metric.cpp ----------------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "Metric.h"
11#include "MemoryGauge.h"
12#include <cmath>
13
14using namespace lldb_perf;
15
16template <class T>
17Metric<T>::Metric () : Metric ("")
18{
19}
20
21template <class T>
22Metric<T>::Metric (const char* n, const char* d) :
23    m_name(n ? n : ""),
24    m_description(d ? d : ""),
25    m_dataset ()
26{
27}
28
29template <class T>
30void
31Metric<T>::Append (T v)
32{
33    m_dataset.push_back(v);
34}
35
36template <class T>
37size_t
38Metric<T>::GetCount () const
39{
40    return m_dataset.size();
41}
42
43template <class T>
44T
45Metric<T>::GetSum () const
46{
47    T sum = 0;
48    for (auto v : m_dataset)
49        sum += v;
50    return sum;
51}
52
53template <class T>
54T
55Metric<T>::GetAverage () const
56{
57    return GetSum()/GetCount();
58}
59
60template <class T>
61T
62Metric<T>::GetStandardDeviation () const
63{
64    T average = GetAverage();
65    T diff_squared = 0;
66    size_t count = GetCount();
67    for (auto v : m_dataset)
68        diff_squared = diff_squared + ( (v-average)*(v-average) );
69    diff_squared = diff_squared / count;
70    return sqrt(diff_squared);
71}
72
73template class lldb_perf::Metric<double>;
74template class lldb_perf::Metric<MemoryStats>;
75