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 <tuple>
22 #include <vector>
23
24 #include "check.h"
25 #include "string_util.h"
26
27 namespace benchmark {
28
BenchmarkReporter()29 BenchmarkReporter::BenchmarkReporter()
30 : output_stream_(&std::cout), error_stream_(&std::cerr) {}
31
~BenchmarkReporter()32 BenchmarkReporter::~BenchmarkReporter() {}
33
PrintBasicContext(std::ostream * out,Context const & context)34 void BenchmarkReporter::PrintBasicContext(std::ostream *out,
35 Context const &context) {
36 CHECK(out) << "cannot be null";
37 auto &Out = *out;
38
39 Out << LocalDateTimeString() << "\n";
40
41 if (context.executable_name)
42 Out << "Running " << context.executable_name << "\n";
43
44 const CPUInfo &info = context.cpu_info;
45 Out << "Run on (" << info.num_cpus << " X "
46 << (info.cycles_per_second / 1000000.0) << " MHz CPU "
47 << ((info.num_cpus > 1) ? "s" : "") << ")\n";
48 if (info.caches.size() != 0) {
49 Out << "CPU Caches:\n";
50 for (auto &CInfo : info.caches) {
51 Out << " L" << CInfo.level << " " << CInfo.type << " "
52 << (CInfo.size / 1000) << "K";
53 if (CInfo.num_sharing != 0)
54 Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
55 Out << "\n";
56 }
57 }
58 if (!info.load_avg.empty()) {
59 Out << "Load Average: ";
60 for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
61 Out << StrFormat("%.2f", *It++);
62 if (It != info.load_avg.end()) Out << ", ";
63 }
64 Out << "\n";
65 }
66
67 if (info.scaling_enabled) {
68 Out << "***WARNING*** CPU scaling is enabled, the benchmark "
69 "real time measurements may be noisy and will incur extra "
70 "overhead.\n";
71 }
72
73 #ifndef NDEBUG
74 Out << "***WARNING*** Library was built as DEBUG. Timings may be "
75 "affected.\n";
76 #endif
77 }
78
79 // No initializer because it's already initialized to NULL.
80 const char *BenchmarkReporter::Context::executable_name;
81
Context()82 BenchmarkReporter::Context::Context()
83 : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
84
benchmark_name() const85 std::string BenchmarkReporter::Run::benchmark_name() const {
86 std::string name = run_name;
87 if (run_type == RT_Aggregate) {
88 name += "_" + aggregate_name;
89 }
90 return name;
91 }
92
GetAdjustedRealTime() const93 double BenchmarkReporter::Run::GetAdjustedRealTime() const {
94 double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
95 if (iterations != 0) new_time /= static_cast<double>(iterations);
96 return new_time;
97 }
98
GetAdjustedCPUTime() const99 double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
100 double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
101 if (iterations != 0) new_time /= static_cast<double>(iterations);
102 return new_time;
103 }
104
105 } // end namespace benchmark
106