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 <tuple> 22 #include <vector> 23 24 #include "check.h" 25 #include "stat.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_ptr, 35 Context const &context) { 36 CHECK(out_ptr) << "cannot be null"; 37 auto &Out = *out_ptr; 38 39 Out << "Run on (" << context.num_cpus << " X " << context.mhz_per_cpu 40 << " MHz CPU " << ((context.num_cpus > 1) ? "s" : "") << ")\n"; 41 42 Out << LocalDateTimeString() << "\n"; 43 44 if (context.cpu_scaling_enabled) { 45 Out << "***WARNING*** CPU scaling is enabled, the benchmark " 46 "real time measurements may be noisy and will incur extra " 47 "overhead.\n"; 48 } 49 50 #ifndef NDEBUG 51 Out << "***WARNING*** Library was built as DEBUG. Timings may be " 52 "affected.\n"; 53 #endif 54 } 55 56 double BenchmarkReporter::Run::GetAdjustedRealTime() const { 57 double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit); 58 if (iterations != 0) new_time /= static_cast<double>(iterations); 59 return new_time; 60 } 61 62 double BenchmarkReporter::Run::GetAdjustedCPUTime() const { 63 double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit); 64 if (iterations != 0) new_time /= static_cast<double>(iterations); 65 return new_time; 66 } 67 68 } // end namespace benchmark 69
