BSHA3  0.17.99
P2P Blockchain, based on Bitcoin
bench.cpp
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1 // Copyright (c) 2015-2018 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <bench/bench.h>
6 
7 #include <assert.h>
8 #include <iostream>
9 #include <iomanip>
10 #include <algorithm>
11 #include <regex>
12 #include <numeric>
13 
14 void benchmark::ConsolePrinter::header()
15 {
16  std::cout << "# Benchmark, evals, iterations, total, min, max, median" << std::endl;
17 }
18 
19 void benchmark::ConsolePrinter::result(const State& state)
20 {
21  auto results = state.m_elapsed_results;
22  std::sort(results.begin(), results.end());
23 
24  double total = state.m_num_iters * std::accumulate(results.begin(), results.end(), 0.0);
25 
26  double front = 0;
27  double back = 0;
28  double median = 0;
29 
30  if (!results.empty()) {
31  front = results.front();
32  back = results.back();
33 
34  size_t mid = results.size() / 2;
35  median = results[mid];
36  if (0 == results.size() % 2) {
37  median = (results[mid] + results[mid + 1]) / 2;
38  }
39  }
40 
41  std::cout << std::setprecision(6);
42  std::cout << state.m_name << ", " << state.m_num_evals << ", " << state.m_num_iters << ", " << total << ", " << front << ", " << back << ", " << median << std::endl;
43 }
44 
45 void benchmark::ConsolePrinter::footer() {}
46 benchmark::PlotlyPrinter::PlotlyPrinter(std::string plotly_url, int64_t width, int64_t height)
47  : m_plotly_url(plotly_url), m_width(width), m_height(height)
48 {
49 }
50 
51 void benchmark::PlotlyPrinter::header()
52 {
53  std::cout << "<html><head>"
54  << "<script src=\"" << m_plotly_url << "\"></script>"
55  << "</head><body><div id=\"myDiv\" style=\"width:" << m_width << "px; height:" << m_height << "px\"></div>"
56  << "<script> var data = ["
57  << std::endl;
58 }
59 
60 void benchmark::PlotlyPrinter::result(const State& state)
61 {
62  std::cout << "{ " << std::endl
63  << " name: '" << state.m_name << "', " << std::endl
64  << " y: [";
65 
66  const char* prefix = "";
67  for (const auto& e : state.m_elapsed_results) {
68  std::cout << prefix << std::setprecision(6) << e;
69  prefix = ", ";
70  }
71  std::cout << "]," << std::endl
72  << " boxpoints: 'all', jitter: 0.3, pointpos: 0, type: 'box',"
73  << std::endl
74  << "}," << std::endl;
75 }
76 
77 void benchmark::PlotlyPrinter::footer()
78 {
79  std::cout << "]; var layout = { showlegend: false, yaxis: { rangemode: 'tozero', autorange: true } };"
80  << "Plotly.newPlot('myDiv', data, layout);"
81  << "</script></body></html>";
82 }
83 
84 
85 benchmark::BenchRunner::BenchmarkMap& benchmark::BenchRunner::benchmarks()
86 {
87  static std::map<std::string, Bench> benchmarks_map;
88  return benchmarks_map;
89 }
90 
91 benchmark::BenchRunner::BenchRunner(std::string name, benchmark::BenchFunction func, uint64_t num_iters_for_one_second)
92 {
93  benchmarks().insert(std::make_pair(name, Bench{func, num_iters_for_one_second}));
94 }
95 
96 void benchmark::BenchRunner::RunAll(Printer& printer, uint64_t num_evals, double scaling, const std::string& filter, bool is_list_only)
97 {
98  if (!std::ratio_less_equal<benchmark::clock::period, std::micro>::value) {
99  std::cerr << "WARNING: Clock precision is worse than microsecond - benchmarks may be less accurate!\n";
100  }
101 #ifdef DEBUG
102  std::cerr << "WARNING: This is a debug build - may result in slower benchmarks.\n";
103 #endif
104 
105  std::regex reFilter(filter);
106  std::smatch baseMatch;
107 
108  printer.header();
109 
110  for (const auto& p : benchmarks()) {
111  if (!std::regex_match(p.first, baseMatch, reFilter)) {
112  continue;
113  }
114 
115  uint64_t num_iters = static_cast<uint64_t>(p.second.num_iters_for_one_second * scaling);
116  if (0 == num_iters) {
117  num_iters = 1;
118  }
119  State state(p.first, num_evals, num_iters, printer);
120  if (!is_list_only) {
121  p.second.func(state);
122  }
123  printer.result(state);
124  }
125 
126  printer.footer();
127 }
128 
129 bool benchmark::State::UpdateTimer(const benchmark::time_point current_time)
130 {
131  if (m_start_time != time_point()) {
132  std::chrono::duration<double> diff = current_time - m_start_time;
133  m_elapsed_results.push_back(diff.count() / m_num_iters);
134 
135  if (m_elapsed_results.size() == m_num_evals) {
136  return false;
137  }
138  }
139 
140  m_num_iters_left = m_num_iters - 1;
141  return true;
142 }
benchmark::ConsolePrinter::result
void result(const State &state) override
Definition: bench.cpp:19
benchmark::BenchRunner::BenchRunner
BenchRunner(std::string name, BenchFunction func, uint64_t num_iters_for_one_second)
Definition: bench.cpp:91
benchmark::State::m_num_iters
const uint64_t m_num_iters
Definition: bench.h:59
benchmark::PlotlyPrinter::result
void result(const State &state) override
Definition: bench.cpp:60
prefix
const char * prefix
Definition: rest.cpp:581
benchmark::State::m_elapsed_results
std::vector< double > m_elapsed_results
Definition: bench.h:61
benchmark::Printer::result
virtual void result(const State &state)=0
benchmark::State::UpdateTimer
bool UpdateTimer(time_point finish_time)
Definition: bench.cpp:129
benchmark::PlotlyPrinter::header
void header() override
Definition: bench.cpp:51
benchmark::PlotlyPrinter::footer
void footer() override
Definition: bench.cpp:77
benchmark::ConsolePrinter::header
void header() override
Definition: bench.cpp:14
filter
isminefilter filter
Definition: rpcwallet.cpp:1011
name
const char * name
Definition: rest.cpp:37
benchmark::Printer::header
virtual void header()=0
benchmark::ConsolePrinter::footer
void footer() override
Definition: bench.cpp:45
benchmark::State::m_num_evals
const uint64_t m_num_evals
Definition: bench.h:60
benchmark::BenchFunction
std::function< void(State &)> BenchFunction
Definition: bench.h:83
benchmark::BenchRunner::BenchmarkMap
std::map< std::string, Bench > BenchmarkMap
Definition: bench.h:91
benchmark::Printer::footer
virtual void footer()=0
benchmark::BenchRunner::RunAll
static void RunAll(Printer &printer, uint64_t num_evals, double scaling, const std::string &filter, bool is_list_only)
Definition: bench.cpp:96
benchmark::State::m_name
std::string m_name
Definition: bench.h:57
benchmark::time_point
clock::time_point time_point
Definition: bench.h:49
benchmark::BenchRunner::benchmarks
static BenchmarkMap & benchmarks()
Definition: bench.cpp:85
benchmark::PlotlyPrinter::PlotlyPrinter
PlotlyPrinter(std::string plotly_url, int64_t width, int64_t height)
Definition: bench.cpp:46
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