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 "timers.h" 16#include "internal_macros.h" 17 18#ifdef BENCHMARK_OS_WINDOWS 19#include <shlwapi.h> 20#undef StrCat // Don't let StrCat in string_util.h be renamed to lstrcatA 21#include <versionhelpers.h> 22#include <windows.h> 23#else 24#include <fcntl.h> 25#ifndef BENCHMARK_OS_FUCHSIA 26#include <sys/resource.h> 27#endif 28#include <sys/time.h> 29#include <sys/types.h> // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD 30#include <unistd.h> 31#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX 32#include <sys/sysctl.h> 33#endif 34#if defined(BENCHMARK_OS_MACOSX) 35#include <mach/mach_init.h> 36#include <mach/mach_port.h> 37#include <mach/thread_act.h> 38#endif 39#endif 40 41#ifdef BENCHMARK_OS_EMSCRIPTEN 42#include <emscripten.h> 43#endif 44 45#include <cerrno> 46#include <cstdint> 47#include <cstdio> 48#include <cstdlib> 49#include <cstring> 50#include <ctime> 51#include <iostream> 52#include <limits> 53#include <mutex> 54 55#include "check.h" 56#include "log.h" 57#include "sleep.h" 58#include "string_util.h" 59 60namespace benchmark { 61 62// Suppress unused warnings on helper functions. 63#if defined(__GNUC__) 64#pragma GCC diagnostic ignored "-Wunused-function" 65#endif 66 67namespace { 68#if defined(BENCHMARK_OS_WINDOWS) 69double MakeTime(FILETIME const& kernel_time, FILETIME const& user_time) { 70 ULARGE_INTEGER kernel; 71 ULARGE_INTEGER user; 72 kernel.HighPart = kernel_time.dwHighDateTime; 73 kernel.LowPart = kernel_time.dwLowDateTime; 74 user.HighPart = user_time.dwHighDateTime; 75 user.LowPart = user_time.dwLowDateTime; 76 return (static_cast<double>(kernel.QuadPart) + 77 static_cast<double>(user.QuadPart)) * 78 1e-7; 79} 80#elif !defined(BENCHMARK_OS_FUCHSIA) 81double MakeTime(struct rusage const& ru) { 82 return (static_cast<double>(ru.ru_utime.tv_sec) + 83 static_cast<double>(ru.ru_utime.tv_usec) * 1e-6 + 84 static_cast<double>(ru.ru_stime.tv_sec) + 85 static_cast<double>(ru.ru_stime.tv_usec) * 1e-6); 86} 87#endif 88#if defined(BENCHMARK_OS_MACOSX) 89double MakeTime(thread_basic_info_data_t const& info) { 90 return (static_cast<double>(info.user_time.seconds) + 91 static_cast<double>(info.user_time.microseconds) * 1e-6 + 92 static_cast<double>(info.system_time.seconds) + 93 static_cast<double>(info.system_time.microseconds) * 1e-6); 94} 95#endif 96#if defined(CLOCK_PROCESS_CPUTIME_ID) || defined(CLOCK_THREAD_CPUTIME_ID) 97double MakeTime(struct timespec const& ts) { 98 return ts.tv_sec + (static_cast<double>(ts.tv_nsec) * 1e-9); 99} 100#endif 101 102BENCHMARK_NORETURN static void DiagnoseAndExit(const char* msg) { 103 std::cerr << "ERROR: " << msg << std::endl; 104 std::exit(EXIT_FAILURE); 105} 106 107} // end namespace 108 109double ProcessCPUUsage() { 110#if defined(BENCHMARK_OS_WINDOWS) 111 HANDLE proc = GetCurrentProcess(); 112 FILETIME creation_time; 113 FILETIME exit_time; 114 FILETIME kernel_time; 115 FILETIME user_time; 116 if (GetProcessTimes(proc, &creation_time, &exit_time, &kernel_time, 117 &user_time)) 118 return MakeTime(kernel_time, user_time); 119 DiagnoseAndExit("GetProccessTimes() failed"); 120#elif defined(BENCHMARK_OS_EMSCRIPTEN) 121 // clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) returns 0 on Emscripten. 122 // Use Emscripten-specific API. Reported CPU time would be exactly the 123 // same as total time, but this is ok because there aren't long-latency 124 // syncronous system calls in Emscripten. 125 return emscripten_get_now() * 1e-3; 126#elif defined(CLOCK_PROCESS_CPUTIME_ID) && !defined(BENCHMARK_OS_MACOSX) 127 // FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See 128 // https://github.com/google/benchmark/pull/292 129 struct timespec spec; 130 if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &spec) == 0) 131 return MakeTime(spec); 132 DiagnoseAndExit("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) failed"); 133#else 134 struct rusage ru; 135 if (getrusage(RUSAGE_SELF, &ru) == 0) return MakeTime(ru); 136 DiagnoseAndExit("getrusage(RUSAGE_SELF, ...) failed"); 137#endif 138} 139 140double ThreadCPUUsage() { 141#if defined(BENCHMARK_OS_WINDOWS) 142 HANDLE this_thread = GetCurrentThread(); 143 FILETIME creation_time; 144 FILETIME exit_time; 145 FILETIME kernel_time; 146 FILETIME user_time; 147 GetThreadTimes(this_thread, &creation_time, &exit_time, &kernel_time, 148 &user_time); 149 return MakeTime(kernel_time, user_time); 150#elif defined(BENCHMARK_OS_MACOSX) 151 // FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See 152 // https://github.com/google/benchmark/pull/292 153 mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT; 154 thread_basic_info_data_t info; 155 mach_port_t thread = pthread_mach_thread_np(pthread_self()); 156 if (thread_info(thread, THREAD_BASIC_INFO, (thread_info_t)&info, &count) == 157 KERN_SUCCESS) { 158 return MakeTime(info); 159 } 160 DiagnoseAndExit("ThreadCPUUsage() failed when evaluating thread_info"); 161#elif defined(BENCHMARK_OS_EMSCRIPTEN) 162 // Emscripten doesn't support traditional threads 163 return ProcessCPUUsage(); 164#elif defined(BENCHMARK_OS_RTEMS) 165 // RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See 166 // https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c 167 return ProcessCPUUsage(); 168#elif defined(BENCHMARK_OS_SOLARIS) 169 struct rusage ru; 170 if (getrusage(RUSAGE_LWP, &ru) == 0) return MakeTime(ru); 171 DiagnoseAndExit("getrusage(RUSAGE_LWP, ...) failed"); 172#elif defined(CLOCK_THREAD_CPUTIME_ID) 173 struct timespec ts; 174 if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts); 175 DiagnoseAndExit("clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed"); 176#else 177#error Per-thread timing is not available on your system. 178#endif 179} 180 181namespace { 182 183std::string DateTimeString(bool local) { 184 typedef std::chrono::system_clock Clock; 185 std::time_t now = Clock::to_time_t(Clock::now()); 186 const std::size_t kStorageSize = 128; 187 char storage[kStorageSize]; 188 std::size_t written; 189 190 if (local) { 191#if defined(BENCHMARK_OS_WINDOWS) 192 written = 193 std::strftime(storage, sizeof(storage), "%x %X", ::localtime(&now)); 194#else 195 std::tm timeinfo; 196 ::localtime_r(&now, &timeinfo); 197 written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo); 198#endif 199 } else { 200#if defined(BENCHMARK_OS_WINDOWS) 201 written = std::strftime(storage, sizeof(storage), "%x %X", ::gmtime(&now)); 202#else 203 std::tm timeinfo; 204 ::gmtime_r(&now, &timeinfo); 205 written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo); 206#endif 207 } 208 CHECK(written < kStorageSize); 209 ((void)written); // prevent unused variable in optimized mode. 210 return std::string(storage); 211} 212 213} // end namespace 214 215std::string LocalDateTimeString() { return DateTimeString(true); } 216 217} // end namespace benchmark 218