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 29 BenchmarkReporter::BenchmarkReporter() 30 : output_stream_(&std::cout), error_stream_(&std::cerr) {} 31 32 BenchmarkReporter::~BenchmarkReporter() {} 33 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 82 BenchmarkReporter::Context::Context() 83 : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {} 84 85 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 93 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 99 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
