785ce645e2
this benchmark shows that, as we expected, on Android mutexes, spinlocks and lock-free algorithms are running at similar performance.
117 lines
3.8 KiB
C++
117 lines
3.8 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "PerformanceCounters.h"
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#include <utils/Allocator.h>
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#include <utils/compiler.h>
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#include <utils/Mutex.h>
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#include <benchmark/benchmark.h>
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using namespace utils;
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class Allocators : public benchmark::Fixture {
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public:
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Allocators();
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~Allocators() override;
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protected:
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struct alignas(64) Payload {};
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static_assert(sizeof(Payload) == 64, "Payload must be 64 bytes");
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utils::Arena<utils::ObjectPoolAllocator<Payload>, LockingPolicy::NoLock> mPoolAllocatorNoLock;
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utils::Arena<utils::ObjectPoolAllocator<Payload>, std::mutex> mPoolAllocatorStdMutex;
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utils::Arena<utils::ObjectPoolAllocator<Payload>, utils::Mutex> mPoolAllocatorUtilsMutex;
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utils::Arena<utils::ObjectPoolAllocator<Payload>, LockingPolicy::SpinLock> mPoolAllocatorSpinlock;
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utils::Arena<utils::ThreadSafeObjectPoolAllocator<Payload>, LockingPolicy::NoLock> mPoolAllocatorAtomic;
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};
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static constexpr size_t POOL_ITEM_COUNT = 4096;
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Allocators::Allocators()
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: mPoolAllocatorNoLock("nolock", POOL_ITEM_COUNT * sizeof(Payload)),
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mPoolAllocatorStdMutex("std::mutex", POOL_ITEM_COUNT * sizeof(Payload)),
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mPoolAllocatorUtilsMutex("utils::Mutex", POOL_ITEM_COUNT * sizeof(Payload)),
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mPoolAllocatorSpinlock("spinlock", POOL_ITEM_COUNT * sizeof(Payload)),
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mPoolAllocatorAtomic("atomic", POOL_ITEM_COUNT * sizeof(Payload)) {
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}
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Allocators::~Allocators() = default;
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BENCHMARK_F(Allocators, poolAllocator_nolock)(benchmark::State& state) {
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auto& pool = mPoolAllocatorNoLock;
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PerformanceCounters pc(state);
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for (auto _ : state) {
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Payload* p = pool.alloc<Payload>(1);
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pool.free(p);
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}
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}
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BENCHMARK_DEFINE_F(Allocators, poolAllocator_std_mutex)(benchmark::State& state) {
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auto& pool = mPoolAllocatorStdMutex;
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PerformanceCounters pc(state);
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for (auto _ : state) {
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Payload* p = pool.alloc<Payload>(1);
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pool.free(p);
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}
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}
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BENCHMARK_DEFINE_F(Allocators, poolAllocator_utils_mutex)(benchmark::State& state) {
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auto& pool = mPoolAllocatorUtilsMutex;
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PerformanceCounters pc(state);
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for (auto _ : state) {
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Payload* p = pool.alloc<Payload>(1);
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pool.free(p);
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}
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}
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BENCHMARK_DEFINE_F(Allocators, poolAllocator_spinlock)(benchmark::State& state) {
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auto& pool = mPoolAllocatorSpinlock;
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PerformanceCounters pc(state);
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for (auto _ : state) {
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Payload* p = pool.alloc<Payload>(1);
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pool.free(p);
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}
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}
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BENCHMARK_DEFINE_F(Allocators, poolAllocator_atomic)(benchmark::State& state) {
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auto& pool = mPoolAllocatorAtomic;
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PerformanceCounters pc(state);
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for (auto _ : state) {
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Payload* p = pool.alloc<Payload>(1);
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pool.free(p);
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}
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}
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BENCHMARK_REGISTER_F(Allocators, poolAllocator_std_mutex)
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->ThreadRange(1, 4)
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->Threads(benchmark::CPUInfo::Get().num_cpus * 2);
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BENCHMARK_REGISTER_F(Allocators, poolAllocator_utils_mutex)
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->ThreadRange(1, 4)
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->Threads(benchmark::CPUInfo::Get().num_cpus * 2);
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BENCHMARK_REGISTER_F(Allocators, poolAllocator_spinlock)
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->ThreadRange(1, 4)
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->Threads(benchmark::CPUInfo::Get().num_cpus * 2);
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BENCHMARK_REGISTER_F(Allocators, poolAllocator_atomic)
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->ThreadRange(1, 4)
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->Threads(benchmark::CPUInfo::Get().num_cpus * 2);
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