• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
27 namespace benchmark {
28 namespace internal {
29 extern std::map<std::string, std::string> *global_context;
30 }
31 
BenchmarkReporter()32 BenchmarkReporter::BenchmarkReporter()
33     : output_stream_(&std::cout), error_stream_(&std::cerr) {}
34 
~BenchmarkReporter()35 BenchmarkReporter::~BenchmarkReporter() {}
36 
PrintBasicContext(std::ostream * out,Context const & context)37 void 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.
89 const char *BenchmarkReporter::Context::executable_name;
90 
Context()91 BenchmarkReporter::Context::Context()
92     : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
93 
benchmark_name() const94 std::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 
GetAdjustedRealTime() const102 double 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 
GetAdjustedCPUTime() const108 double 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