1// Copyright 2015 Google Inc. All rights reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#include "benchmark/benchmark.h"
16#include "timers.h"
17
18#include <cstdlib>
19
20#include <iostream>
21#include <map>
22#include <string>
23#include <tuple>
24#include <vector>
25
26#include "check.h"
27#include "string_util.h"
28
29namespace benchmark {
30namespace internal {
31extern std::map<std::string, std::string>* global_context;
32}
33
34BenchmarkReporter::BenchmarkReporter()
35 : output_stream_(&std::cout), error_stream_(&std::cerr) {}
36
37BenchmarkReporter::~BenchmarkReporter() {}
38
39void BenchmarkReporter::PrintBasicContext(std::ostream *out,
40 Context const &context) {
41 CHECK(out) << "cannot be null";
42 auto &Out = *out;
43
44 Out << LocalDateTimeString() << "\n";
45
46 if (context.executable_name)
47 Out << "Running " << context.executable_name << "\n";
48
49 const CPUInfo &info = context.cpu_info;
50 Out << "Run on (" << info.num_cpus << " X "
51 << (info.cycles_per_second / 1000000.0) << " MHz CPU "
52 << ((info.num_cpus > 1) ? "s" : "") << ")\n";
53 if (info.caches.size() != 0) {
54 Out << "CPU Caches:\n";
55 for (auto &CInfo : info.caches) {
56 Out << " L" << CInfo.level << " " << CInfo.type << " "
57 << (CInfo.size / 1024) << " KiB";
58 if (CInfo.num_sharing != 0)
59 Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
60 Out << "\n";
61 }
62 }
63 if (!info.load_avg.empty()) {
64 Out << "Load Average: ";
65 for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
66 Out << StrFormat("%.2f", *It++);
67 if (It != info.load_avg.end()) Out << ", ";
68 }
69 Out << "\n";
70 }
71
72 if (internal::global_context != nullptr) {
73 for (const auto& kv: *internal::global_context) {
74 Out << kv.first << ": " << kv.second << "\n";
75 }
76 }
77
78 if (CPUInfo::Scaling::ENABLED == info.scaling) {
79 Out << "***WARNING*** CPU scaling is enabled, the benchmark "
80 "real time measurements may be noisy and will incur extra "
81 "overhead.\n";
82 }
83
84#ifndef NDEBUG
85 Out << "***WARNING*** Library was built as DEBUG. Timings may be "
86 "affected.\n";
87#endif
88}
89
90// No initializer because it's already initialized to NULL.
91const char *BenchmarkReporter::Context::executable_name;
92
93BenchmarkReporter::Context::Context()
94 : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
95
96std::string BenchmarkReporter::Run::benchmark_name() const {
97 std::string name = run_name.str();
98 if (run_type == RT_Aggregate) {
99 name += "_" + aggregate_name;
100 }
101 return name;
102}
103
104double BenchmarkReporter::Run::GetAdjustedRealTime() const {
105 double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
106 if (iterations != 0) new_time /= static_cast<double>(iterations);
107 return new_time;
108}
109
110double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
111 double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
112 if (iterations != 0) new_time /= static_cast<double>(iterations);
113 return new_time;
114}
115
116} // end namespace benchmark
117