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 26 namespace benchmark { 27 BenchmarkReporter()28BenchmarkReporter::BenchmarkReporter() 29 : output_stream_(&std::cout), error_stream_(&std::cerr) {} 30 ~BenchmarkReporter()31BenchmarkReporter::~BenchmarkReporter() {} 32 PrintBasicContext(std::ostream * out,Context const & context)33void BenchmarkReporter::PrintBasicContext(std::ostream *out, 34 Context const &context) { 35 CHECK(out) << "cannot be null"; 36 auto &Out = *out; 37 38 Out << LocalDateTimeString() << "\n"; 39 40 const CPUInfo &info = context.cpu_info; 41 Out << "Run on (" << info.num_cpus << " X " 42 << (info.cycles_per_second / 1000000.0) << " MHz CPU " 43 << ((info.num_cpus > 1) ? "s" : "") << ")\n"; 44 if (info.caches.size() != 0) { 45 Out << "CPU Caches:\n"; 46 for (auto &CInfo : info.caches) { 47 Out << " L" << CInfo.level << " " << CInfo.type << " " 48 << (CInfo.size / 1000) << "K"; 49 if (CInfo.num_sharing != 0) 50 Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")"; 51 Out << "\n"; 52 } 53 } 54 55 if (info.scaling_enabled) { 56 Out << "***WARNING*** CPU scaling is enabled, the benchmark " 57 "real time measurements may be noisy and will incur extra " 58 "overhead.\n"; 59 } 60 61 #ifndef NDEBUG 62 Out << "***WARNING*** Library was built as DEBUG. Timings may be " 63 "affected.\n"; 64 #endif 65 } 66 Context()67BenchmarkReporter::Context::Context() : cpu_info(CPUInfo::Get()) {} 68 GetAdjustedRealTime() const69double BenchmarkReporter::Run::GetAdjustedRealTime() const { 70 double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit); 71 if (iterations != 0) new_time /= static_cast<double>(iterations); 72 return new_time; 73 } 74 GetAdjustedCPUTime() const75double BenchmarkReporter::Run::GetAdjustedCPUTime() const { 76 double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit); 77 if (iterations != 0) new_time /= static_cast<double>(iterations); 78 return new_time; 79 } 80 81 } // end namespace benchmark 82