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Diffstat (limited to 'lib/libcxx/utils/google-benchmark/src/benchmark.cc')
| -rw-r--r-- | lib/libcxx/utils/google-benchmark/src/benchmark.cc | 493 |
1 files changed, 0 insertions, 493 deletions
diff --git a/lib/libcxx/utils/google-benchmark/src/benchmark.cc b/lib/libcxx/utils/google-benchmark/src/benchmark.cc deleted file mode 100644 index aab07500af4..00000000000 --- a/lib/libcxx/utils/google-benchmark/src/benchmark.cc +++ /dev/null @@ -1,493 +0,0 @@ -// Copyright 2015 Google Inc. All rights reserved. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "benchmark/benchmark.h" -#include "benchmark_api_internal.h" -#include "benchmark_runner.h" -#include "internal_macros.h" - -#ifndef BENCHMARK_OS_WINDOWS -#ifndef BENCHMARK_OS_FUCHSIA -#include <sys/resource.h> -#endif -#include <sys/time.h> -#include <unistd.h> -#endif - -#include <algorithm> -#include <atomic> -#include <condition_variable> -#include <cstdio> -#include <cstdlib> -#include <fstream> -#include <iostream> -#include <memory> -#include <string> -#include <thread> -#include <utility> - -#include "check.h" -#include "colorprint.h" -#include "commandlineflags.h" -#include "complexity.h" -#include "counter.h" -#include "internal_macros.h" -#include "log.h" -#include "mutex.h" -#include "re.h" -#include "statistics.h" -#include "string_util.h" -#include "thread_manager.h" -#include "thread_timer.h" - -DEFINE_bool(benchmark_list_tests, false, - "Print a list of benchmarks. This option overrides all other " - "options."); - -DEFINE_string(benchmark_filter, ".", - "A regular expression that specifies the set of benchmarks " - "to execute. If this flag is empty, or if this flag is the " - "string \"all\", all benchmarks linked into the binary are " - "run."); - -DEFINE_double(benchmark_min_time, 0.5, - "Minimum number of seconds we should run benchmark before " - "results are considered significant. For cpu-time based " - "tests, this is the lower bound on the total cpu time " - "used by all threads that make up the test. For real-time " - "based tests, this is the lower bound on the elapsed time " - "of the benchmark execution, regardless of number of " - "threads."); - -DEFINE_int32(benchmark_repetitions, 1, - "The number of runs of each benchmark. If greater than 1, the " - "mean and standard deviation of the runs will be reported."); - -DEFINE_bool( - benchmark_report_aggregates_only, false, - "Report the result of each benchmark repetitions. When 'true' is specified " - "only the mean, standard deviation, and other statistics are reported for " - "repeated benchmarks. Affects all reporters."); - -DEFINE_bool( - benchmark_display_aggregates_only, false, - "Display the result of each benchmark repetitions. When 'true' is " - "specified only the mean, standard deviation, and other statistics are " - "displayed for repeated benchmarks. Unlike " - "benchmark_report_aggregates_only, only affects the display reporter, but " - "*NOT* file reporter, which will still contain all the output."); - -DEFINE_string(benchmark_format, "console", - "The format to use for console output. Valid values are " - "'console', 'json', or 'csv'."); - -DEFINE_string(benchmark_out_format, "json", - "The format to use for file output. Valid values are " - "'console', 'json', or 'csv'."); - -DEFINE_string(benchmark_out, "", "The file to write additional output to"); - -DEFINE_string(benchmark_color, "auto", - "Whether to use colors in the output. Valid values: " - "'true'/'yes'/1, 'false'/'no'/0, and 'auto'. 'auto' means to use " - "colors if the output is being sent to a terminal and the TERM " - "environment variable is set to a terminal type that supports " - "colors."); - -DEFINE_bool(benchmark_counters_tabular, false, - "Whether to use tabular format when printing user counters to " - "the console. Valid values: 'true'/'yes'/1, 'false'/'no'/0." - "Defaults to false."); - -DEFINE_int32(v, 0, "The level of verbose logging to output"); - -namespace benchmark { - -namespace internal { - -// FIXME: wouldn't LTO mess this up? -void UseCharPointer(char const volatile*) {} - -} // namespace internal - -State::State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i, - int n_threads, internal::ThreadTimer* timer, - internal::ThreadManager* manager) - : total_iterations_(0), - batch_leftover_(0), - max_iterations(max_iters), - started_(false), - finished_(false), - error_occurred_(false), - range_(ranges), - complexity_n_(0), - counters(), - thread_index(thread_i), - threads(n_threads), - timer_(timer), - manager_(manager) { - CHECK(max_iterations != 0) << "At least one iteration must be run"; - CHECK_LT(thread_index, threads) << "thread_index must be less than threads"; - - // Note: The use of offsetof below is technically undefined until C++17 - // because State is not a standard layout type. However, all compilers - // currently provide well-defined behavior as an extension (which is - // demonstrated since constexpr evaluation must diagnose all undefined - // behavior). However, GCC and Clang also warn about this use of offsetof, - // which must be suppressed. -#if defined(__INTEL_COMPILER) -#pragma warning push -#pragma warning(disable:1875) -#elif defined(__GNUC__) -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Winvalid-offsetof" -#endif - // Offset tests to ensure commonly accessed data is on the first cache line. - const int cache_line_size = 64; - static_assert(offsetof(State, error_occurred_) <= - (cache_line_size - sizeof(error_occurred_)), - ""); -#if defined(__INTEL_COMPILER) -#pragma warning pop -#elif defined(__GNUC__) -#pragma GCC diagnostic pop -#endif -} - -void State::PauseTiming() { - // Add in time accumulated so far - CHECK(started_ && !finished_ && !error_occurred_); - timer_->StopTimer(); -} - -void State::ResumeTiming() { - CHECK(started_ && !finished_ && !error_occurred_); - timer_->StartTimer(); -} - -void State::SkipWithError(const char* msg) { - CHECK(msg); - error_occurred_ = true; - { - MutexLock l(manager_->GetBenchmarkMutex()); - if (manager_->results.has_error_ == false) { - manager_->results.error_message_ = msg; - manager_->results.has_error_ = true; - } - } - total_iterations_ = 0; - if (timer_->running()) timer_->StopTimer(); -} - -void State::SetIterationTime(double seconds) { - timer_->SetIterationTime(seconds); -} - -void State::SetLabel(const char* label) { - MutexLock l(manager_->GetBenchmarkMutex()); - manager_->results.report_label_ = label; -} - -void State::StartKeepRunning() { - CHECK(!started_ && !finished_); - started_ = true; - total_iterations_ = error_occurred_ ? 0 : max_iterations; - manager_->StartStopBarrier(); - if (!error_occurred_) ResumeTiming(); -} - -void State::FinishKeepRunning() { - CHECK(started_ && (!finished_ || error_occurred_)); - if (!error_occurred_) { - PauseTiming(); - } - // Total iterations has now wrapped around past 0. Fix this. - total_iterations_ = 0; - finished_ = true; - manager_->StartStopBarrier(); -} - -namespace internal { -namespace { - -void RunBenchmarks(const std::vector<BenchmarkInstance>& benchmarks, - BenchmarkReporter* display_reporter, - BenchmarkReporter* file_reporter) { - // Note the file_reporter can be null. - CHECK(display_reporter != nullptr); - - // Determine the width of the name field using a minimum width of 10. - bool might_have_aggregates = FLAGS_benchmark_repetitions > 1; - size_t name_field_width = 10; - size_t stat_field_width = 0; - for (const BenchmarkInstance& benchmark : benchmarks) { - name_field_width = - std::max<size_t>(name_field_width, benchmark.name.size()); - might_have_aggregates |= benchmark.repetitions > 1; - - for (const auto& Stat : *benchmark.statistics) - stat_field_width = std::max<size_t>(stat_field_width, Stat.name_.size()); - } - if (might_have_aggregates) name_field_width += 1 + stat_field_width; - - // Print header here - BenchmarkReporter::Context context; - context.name_field_width = name_field_width; - - // Keep track of running times of all instances of current benchmark - std::vector<BenchmarkReporter::Run> complexity_reports; - - // We flush streams after invoking reporter methods that write to them. This - // ensures users get timely updates even when streams are not line-buffered. - auto flushStreams = [](BenchmarkReporter* reporter) { - if (!reporter) return; - std::flush(reporter->GetOutputStream()); - std::flush(reporter->GetErrorStream()); - }; - - if (display_reporter->ReportContext(context) && - (!file_reporter || file_reporter->ReportContext(context))) { - flushStreams(display_reporter); - flushStreams(file_reporter); - - for (const auto& benchmark : benchmarks) { - RunResults run_results = RunBenchmark(benchmark, &complexity_reports); - - auto report = [&run_results](BenchmarkReporter* reporter, - bool report_aggregates_only) { - assert(reporter); - // If there are no aggregates, do output non-aggregates. - report_aggregates_only &= !run_results.aggregates_only.empty(); - if (!report_aggregates_only) - reporter->ReportRuns(run_results.non_aggregates); - if (!run_results.aggregates_only.empty()) - reporter->ReportRuns(run_results.aggregates_only); - }; - - report(display_reporter, run_results.display_report_aggregates_only); - if (file_reporter) - report(file_reporter, run_results.file_report_aggregates_only); - - flushStreams(display_reporter); - flushStreams(file_reporter); - } - } - display_reporter->Finalize(); - if (file_reporter) file_reporter->Finalize(); - flushStreams(display_reporter); - flushStreams(file_reporter); -} - -std::unique_ptr<BenchmarkReporter> CreateReporter( - std::string const& name, ConsoleReporter::OutputOptions output_opts) { - typedef std::unique_ptr<BenchmarkReporter> PtrType; - if (name == "console") { - return PtrType(new ConsoleReporter(output_opts)); - } else if (name == "json") { - return PtrType(new JSONReporter); - } else if (name == "csv") { - return PtrType(new CSVReporter); - } else { - std::cerr << "Unexpected format: '" << name << "'\n"; - std::exit(1); - } -} - -} // end namespace - -bool IsZero(double n) { - return std::abs(n) < std::numeric_limits<double>::epsilon(); -} - -ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color) { - int output_opts = ConsoleReporter::OO_Defaults; - auto is_benchmark_color = [force_no_color] () -> bool { - if (force_no_color) { - return false; - } - if (FLAGS_benchmark_color == "auto") { - return IsColorTerminal(); - } - return IsTruthyFlagValue(FLAGS_benchmark_color); - }; - if (is_benchmark_color()) { - output_opts |= ConsoleReporter::OO_Color; - } else { - output_opts &= ~ConsoleReporter::OO_Color; - } - if (FLAGS_benchmark_counters_tabular) { - output_opts |= ConsoleReporter::OO_Tabular; - } else { - output_opts &= ~ConsoleReporter::OO_Tabular; - } - return static_cast<ConsoleReporter::OutputOptions>(output_opts); -} - -} // end namespace internal - -size_t RunSpecifiedBenchmarks() { - return RunSpecifiedBenchmarks(nullptr, nullptr); -} - -size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter) { - return RunSpecifiedBenchmarks(display_reporter, nullptr); -} - -size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter, - BenchmarkReporter* file_reporter) { - std::string spec = FLAGS_benchmark_filter; - if (spec.empty() || spec == "all") - spec = "."; // Regexp that matches all benchmarks - - // Setup the reporters - std::ofstream output_file; - std::unique_ptr<BenchmarkReporter> default_display_reporter; - std::unique_ptr<BenchmarkReporter> default_file_reporter; - if (!display_reporter) { - default_display_reporter = internal::CreateReporter( - FLAGS_benchmark_format, internal::GetOutputOptions()); - display_reporter = default_display_reporter.get(); - } - auto& Out = display_reporter->GetOutputStream(); - auto& Err = display_reporter->GetErrorStream(); - - std::string const& fname = FLAGS_benchmark_out; - if (fname.empty() && file_reporter) { - Err << "A custom file reporter was provided but " - "--benchmark_out=<file> was not specified." - << std::endl; - std::exit(1); - } - if (!fname.empty()) { - output_file.open(fname); - if (!output_file.is_open()) { - Err << "invalid file name: '" << fname << std::endl; - std::exit(1); - } - if (!file_reporter) { - default_file_reporter = internal::CreateReporter( - FLAGS_benchmark_out_format, ConsoleReporter::OO_None); - file_reporter = default_file_reporter.get(); - } - file_reporter->SetOutputStream(&output_file); - file_reporter->SetErrorStream(&output_file); - } - - std::vector<internal::BenchmarkInstance> benchmarks; - if (!FindBenchmarksInternal(spec, &benchmarks, &Err)) return 0; - - if (benchmarks.empty()) { - Err << "Failed to match any benchmarks against regex: " << spec << "\n"; - return 0; - } - - if (FLAGS_benchmark_list_tests) { - for (auto const& benchmark : benchmarks) Out << benchmark.name << "\n"; - } else { - internal::RunBenchmarks(benchmarks, display_reporter, file_reporter); - } - - return benchmarks.size(); -} - -void RegisterMemoryManager(MemoryManager* manager) { - internal::memory_manager = manager; -} - -namespace internal { - -void PrintUsageAndExit() { - fprintf(stdout, - "benchmark" - " [--benchmark_list_tests={true|false}]\n" - " [--benchmark_filter=<regex>]\n" - " [--benchmark_min_time=<min_time>]\n" - " [--benchmark_repetitions=<num_repetitions>]\n" - " [--benchmark_report_aggregates_only={true|false}]\n" - " [--benchmark_display_aggregates_only={true|false}]\n" - " [--benchmark_format=<console|json|csv>]\n" - " [--benchmark_out=<filename>]\n" - " [--benchmark_out_format=<json|console|csv>]\n" - " [--benchmark_color={auto|true|false}]\n" - " [--benchmark_counters_tabular={true|false}]\n" - " [--v=<verbosity>]\n"); - exit(0); -} - -void ParseCommandLineFlags(int* argc, char** argv) { - using namespace benchmark; - BenchmarkReporter::Context::executable_name = - (argc && *argc > 0) ? argv[0] : "unknown"; - for (int i = 1; i < *argc; ++i) { - if (ParseBoolFlag(argv[i], "benchmark_list_tests", - &FLAGS_benchmark_list_tests) || - ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) || - ParseDoubleFlag(argv[i], "benchmark_min_time", - &FLAGS_benchmark_min_time) || - ParseInt32Flag(argv[i], "benchmark_repetitions", - &FLAGS_benchmark_repetitions) || - ParseBoolFlag(argv[i], "benchmark_report_aggregates_only", - &FLAGS_benchmark_report_aggregates_only) || - ParseBoolFlag(argv[i], "benchmark_display_aggregates_only", - &FLAGS_benchmark_display_aggregates_only) || - ParseStringFlag(argv[i], "benchmark_format", &FLAGS_benchmark_format) || - ParseStringFlag(argv[i], "benchmark_out", &FLAGS_benchmark_out) || - ParseStringFlag(argv[i], "benchmark_out_format", - &FLAGS_benchmark_out_format) || - ParseStringFlag(argv[i], "benchmark_color", &FLAGS_benchmark_color) || - // "color_print" is the deprecated name for "benchmark_color". - // TODO: Remove this. - ParseStringFlag(argv[i], "color_print", &FLAGS_benchmark_color) || - ParseBoolFlag(argv[i], "benchmark_counters_tabular", - &FLAGS_benchmark_counters_tabular) || - ParseInt32Flag(argv[i], "v", &FLAGS_v)) { - for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1]; - - --(*argc); - --i; - } else if (IsFlag(argv[i], "help")) { - PrintUsageAndExit(); - } - } - for (auto const* flag : - {&FLAGS_benchmark_format, &FLAGS_benchmark_out_format}) - if (*flag != "console" && *flag != "json" && *flag != "csv") { - PrintUsageAndExit(); - } - if (FLAGS_benchmark_color.empty()) { - PrintUsageAndExit(); - } -} - -int InitializeStreams() { - static std::ios_base::Init init; - return 0; -} - -} // end namespace internal - -void Initialize(int* argc, char** argv) { - internal::ParseCommandLineFlags(argc, argv); - internal::LogLevel() = FLAGS_v; -} - -bool ReportUnrecognizedArguments(int argc, char** argv) { - for (int i = 1; i < argc; ++i) { - fprintf(stderr, "%s: error: unrecognized command-line flag: %s\n", argv[0], - argv[i]); - } - return argc > 1; -} - -} // end namespace benchmark |