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/reporter.h" 16 #include "timers.h" 17 18 #include <cstdlib> 19 20 #include <iostream> 21 #include <vector> 22 #include <tuple> 23 24 #include "check.h" 25 #include "stat.h" 26 27 namespace benchmark { 28 BenchmarkReporter()29BenchmarkReporter::BenchmarkReporter() 30 : output_stream_(&std::cout), error_stream_(&std::cerr) 31 { 32 } 33 ~BenchmarkReporter()34BenchmarkReporter::~BenchmarkReporter() { 35 } 36 PrintBasicContext(std::ostream * out_ptr,Context const & context)37void BenchmarkReporter::PrintBasicContext(std::ostream *out_ptr, 38 Context const &context) { 39 CHECK(out_ptr) << "cannot be null"; 40 auto& Out = *out_ptr; 41 42 Out << "Run on (" << context.num_cpus << " X " << context.mhz_per_cpu 43 << " MHz CPU " << ((context.num_cpus > 1) ? "s" : "") << ")\n"; 44 45 Out << LocalDateTimeString() << "\n"; 46 47 if (context.cpu_scaling_enabled) { 48 Out << "***WARNING*** CPU scaling is enabled, the benchmark " 49 "real time measurements may be noisy and will incur extra " 50 "overhead.\n"; 51 } 52 53 #ifndef NDEBUG 54 Out << "***WARNING*** Library was built as DEBUG. Timings may be " 55 "affected.\n"; 56 #endif 57 } 58 GetAdjustedRealTime() const59double BenchmarkReporter::Run::GetAdjustedRealTime() const { 60 double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit); 61 if (iterations != 0) 62 new_time /= static_cast<double>(iterations); 63 return new_time; 64 } 65 GetAdjustedCPUTime() const66double BenchmarkReporter::Run::GetAdjustedCPUTime() const { 67 double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit); 68 if (iterations != 0) 69 new_time /= static_cast<double>(iterations); 70 return new_time; 71 } 72 73 74 75 } // end namespace benchmark 76