diff options
Diffstat (limited to 'vespalib/src/tests/clock/clock_benchmark.cpp')
| -rw-r--r-- | vespalib/src/tests/clock/clock_benchmark.cpp | 104 |
1 files changed, 48 insertions, 56 deletions
diff --git a/vespalib/src/tests/clock/clock_benchmark.cpp b/vespalib/src/tests/clock/clock_benchmark.cpp index a21ad2b05ef..620b4e5c83c 100644 --- a/vespalib/src/tests/clock/clock_benchmark.cpp +++ b/vespalib/src/tests/clock/clock_benchmark.cpp @@ -2,7 +2,6 @@ #include <vespa/vespalib/util/clock.h> #include <vespa/vespalib/util/invokeserviceimpl.h> -#include <vespa/fastos/thread.h> #include <cassert> #include <vector> #include <atomic> @@ -10,6 +9,7 @@ #include <cstring> #include <condition_variable> #include <mutex> +#include <thread> using vespalib::Clock; using vespalib::steady_time; @@ -36,7 +36,7 @@ struct NSAtomic : public UpdateClock { std::atomic<int64_t> _value; }; -class TestClock : public FastOS_Runnable +class TestClock { private: int _timePeriodMS; @@ -44,8 +44,9 @@ private: std::condition_variable _cond; UpdateClock &_clock; bool _stop; + std::thread _thread; - void Run(FastOS_ThreadInterface *thisThread, void *arguments) override; + void run(); public: TestClock(UpdateClock & clock, double timePeriod) @@ -53,74 +54,68 @@ public: _lock(), _cond(), _clock(clock), - _stop(false) - { } + _stop(false), + _thread() + { + _thread = std::thread([this](){run();}); + } ~TestClock() { - std::lock_guard<std::mutex> guard(_lock); - _stop = true; - _cond.notify_all(); + { + std::lock_guard<std::mutex> guard(_lock); + _stop = true; + _cond.notify_all(); + } + _thread.join(); } }; -void TestClock::Run(FastOS_ThreadInterface *thread, void *) +void TestClock::run() { std::unique_lock<std::mutex> guard(_lock); - while ( ! thread->GetBreakFlag() && !_stop) { + while (!_stop) { _clock.update(); _cond.wait_for(guard, std::chrono::milliseconds(_timePeriodMS)); } } -struct SamplerBase : public FastOS_Runnable { - SamplerBase(uint32_t threadId) - : _thread(nullptr), - _threadId(threadId), - _samples(0), - _count() +template<typename Func> +struct Sampler { + Sampler(Func func, uint64_t samples) + : _samples(samples), + _count(), + _func(func), + _thread() { memset(_count, 0, sizeof(_count)); + _thread = std::thread([this](){run();}); } - FastOS_ThreadInterface * _thread; - uint32_t _threadId; - uint64_t _samples; - uint64_t _count[3]; -}; - -template<typename Func> -struct Sampler : public SamplerBase { - Sampler(Func func, uint32_t threadId) - : SamplerBase(threadId), - _func(func) - { } - void Run(FastOS_ThreadInterface *, void *) override { - uint64_t samples; + void run() { steady_time prev = _func(); - for (samples = 0; (samples < _samples); samples++) { + for (uint64_t samples = 0; samples < _samples; ++samples) { steady_time now = _func(); duration diff = now - prev; if (diff > duration::zero()) prev = now; _count[1 + ((diff == duration::zero()) ? 0 : (diff > duration::zero()) ? 1 : -1)]++; } - } - Func _func; + uint64_t _samples; + uint64_t _count[3]; + Func _func; + std::thread _thread; }; template<typename Func> -void benchmark(const char * desc, FastOS_ThreadPool & pool, uint64_t samples, uint32_t numThreads, Func func) { - std::vector<std::unique_ptr<SamplerBase>> threads; +void benchmark(const char * desc, uint64_t samples, uint32_t numThreads, Func func) { + std::vector<std::unique_ptr<Sampler<Func>>> threads; threads.reserve(numThreads); steady_time start = steady_clock::now(); for (uint32_t i(0); i < numThreads; i++) { - SamplerBase * sampler = new Sampler<Func>(func, i); - sampler->_samples = samples; - sampler->_thread = pool.NewThread(sampler, nullptr); - threads.emplace_back(sampler); + threads.push_back(std::make_unique<Sampler<Func>>(func, samples)); } uint64_t count[3]; memset(count, 0, sizeof(count)); for (const auto & sampler : threads) { - sampler->_thread->Join(); + sampler->_thread.join(); for (uint32_t i(0); i < 3; i++) { count[i] += sampler->_count[i]; } @@ -129,12 +124,15 @@ void benchmark(const char * desc, FastOS_ThreadPool & pool, uint64_t samples, ui } int -main(int , char *argv[]) +main(int argc, char *argv[]) { + if (argc != 4) { + fprintf(stderr, "usage: %s <frequency> <numThreads> <samples>\n", argv[0]); + return 1; + } uint64_t frequency = atoll(argv[1]); uint32_t numThreads = atoi(argv[2]); uint64_t samples = atoll(argv[3]); - FastOS_ThreadPool pool; NSValue nsValue; NSVolatile nsVolatile; NSAtomic nsAtomic; @@ -143,36 +141,30 @@ main(int , char *argv[]) TestClock nsClock(nsValue, 1.0/frequency); TestClock nsVolatileClock(nsVolatile, 1.0/frequency); TestClock nsAtomicClock(nsAtomic, 1.0/frequency); - assert(pool.NewThread(&nsClock, nullptr) != nullptr); - assert(pool.NewThread(&nsVolatileClock, nullptr) != nullptr); - assert(pool.NewThread(&nsAtomicClock, nullptr) != nullptr); - benchmark("vespalib::Clock", pool, samples, numThreads, [&clock]() { + benchmark("vespalib::Clock", samples, numThreads, [&clock]() { return clock.getTimeNS(); }); - benchmark("uint64_t", pool, samples, numThreads, [&nsValue]() { + benchmark("uint64_t", samples, numThreads, [&nsValue]() { return steady_time (duration(nsValue._value)); }); - benchmark("volatile uint64_t", pool, samples, numThreads, [&nsVolatile]() { + benchmark("volatile uint64_t", samples, numThreads, [&nsVolatile]() { return steady_time(duration(nsVolatile._value)); }); - benchmark("memory_order_relaxed", pool, samples, numThreads, [&nsAtomic]() { + benchmark("memory_order_relaxed", samples, numThreads, [&nsAtomic]() { return steady_time(duration(nsAtomic._value.load(std::memory_order_relaxed))); }); - benchmark("memory_order_consume", pool, samples, numThreads, [&nsAtomic]() { + benchmark("memory_order_consume", samples, numThreads, [&nsAtomic]() { return steady_time(duration(nsAtomic._value.load(std::memory_order_consume))); }); - benchmark("memory_order_acquire", pool, samples, numThreads, [&nsAtomic]() { + benchmark("memory_order_acquire", samples, numThreads, [&nsAtomic]() { return steady_time(duration(nsAtomic._value.load(std::memory_order_acquire))); }); - benchmark("memory_order_seq_cst", pool, samples, numThreads, [&nsAtomic]() { + benchmark("memory_order_seq_cst", samples, numThreads, [&nsAtomic]() { return steady_time(duration(nsAtomic._value.load(std::memory_order_seq_cst))); }); - - benchmark("vespalib::steady_time::now()", pool, samples, numThreads, []() { + benchmark("vespalib::steady_time::now()", samples, numThreads, []() { return steady_clock::now(); }); - - pool.Close(); return 0; } |