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 27namespace benchmark { 28 29BenchmarkReporter::BenchmarkReporter() 30 : output_stream_(&std::cout), error_stream_(&std::cerr) {} 31 32BenchmarkReporter::~BenchmarkReporter() {} 33 34void 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 56double 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 62double 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