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 <cstdlib>
16#include <iostream>
17#include <map>
18#include <string>
19#include <tuple>
20#include <vector>
21
22#include "benchmark/benchmark.h"
23#include "check.h"
24#include "string_util.h"
25#include "timers.h"
26
27namespace benchmark {
28namespace internal {
29extern std::map<std::string, std::string> *global_context;
30}
31
32BenchmarkReporter::BenchmarkReporter()
33 : output_stream_(&std::cout), error_stream_(&std::cerr) {}
34
35BenchmarkReporter::~BenchmarkReporter() {}
36
37void BenchmarkReporter::PrintBasicContext(std::ostream *out,
38 Context const &context) {
39 BM_CHECK(out) << "cannot be null";
40 auto &Out = *out;
41
42 Out << LocalDateTimeString() << "\n";
43
44 if (context.executable_name)
45 Out << "Running " << context.executable_name << "\n";
46
47 const CPUInfo &info = context.cpu_info;
48 Out << "Run on (" << info.num_cpus << " X "
49 << (info.cycles_per_second / 1000000.0) << " MHz CPU "
50 << ((info.num_cpus > 1) ? "s" : "") << ")\n";
51 if (info.caches.size() != 0) {
52 Out << "CPU Caches:\n";
53 for (auto &CInfo : info.caches) {
54 Out << " L" << CInfo.level << " " << CInfo.type << " "
55 << (CInfo.size / 1024) << " KiB";
56 if (CInfo.num_sharing != 0)
57 Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
58 Out << "\n";
59 }
60 }
61 if (!info.load_avg.empty()) {
62 Out << "Load Average: ";
63 for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
64 Out << StrFormat("%.2f", *It++);
65 if (It != info.load_avg.end()) Out << ", ";
66 }
67 Out << "\n";
68 }
69
70 if (internal::global_context != nullptr) {
71 for (const auto &kv : *internal::global_context) {
72 Out << kv.first << ": " << kv.second << "\n";
73 }
74 }
75
76 if (CPUInfo::Scaling::ENABLED == info.scaling) {
77 Out << "***WARNING*** CPU scaling is enabled, the benchmark "
78 "real time measurements may be noisy and will incur extra "
79 "overhead.\n";
80 }
81
82#ifndef NDEBUG
83 Out << "***WARNING*** Library was built as DEBUG. Timings may be "
84 "affected.\n";
85#endif
86}
87
88// No initializer because it's already initialized to NULL.
89const char *BenchmarkReporter::Context::executable_name;
90
91BenchmarkReporter::Context::Context()
92 : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
93
94std::string BenchmarkReporter::Run::benchmark_name() const {
95 std::string name = run_name.str();
96 if (run_type == RT_Aggregate) {
97 name += "_" + aggregate_name;
98 }
99 return name;
100}
101
102double BenchmarkReporter::Run::GetAdjustedRealTime() const {
103 double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
104 if (iterations != 0) new_time /= static_cast<double>(iterations);
105 return new_time;
106}
107
108double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
109 double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
110 if (iterations != 0) new_time /= static_cast<double>(iterations);
111 return new_time;
112}
113
114} // end namespace benchmark
115