8170ca7cd1
- parallel_for doesn't use recursion anymore to create the "leaf" jobs, this is now done linearly on N thread (one thread per CPU). This uses less stack space, and reduces miss-predicted branches. - remove almost all SYSTRACE calls because they have a huge impact on things like parallel_for() and are misleading. They can be enabled again by setting HEAVY_SYSTRACE to true.
85 lines
2.2 KiB
C++
85 lines
2.2 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/JobSystem.h>
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#include <utils/compiler.h>
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#include <benchmark/benchmark.h>
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using namespace utils;
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static void emptyJob(void*, JobSystem&, JobSystem::Job*) {
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}
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static void BM_JobSystem(benchmark::State& state) {
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JobSystem js;
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js.adopt();
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{
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PerformanceCounters pc(state);
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for (auto _ : state) {
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js.runAndWait(js.create(nullptr, &emptyJob));
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}
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}
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state.SetItemsProcessed((int64_t)state.iterations());
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js.emancipate();
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}
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static void BM_JobSystemAsChildren4k(benchmark::State& state) {
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JobSystem js;
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js.adopt();
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{
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PerformanceCounters pc(state);
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for (auto _ : state) {
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auto root = js.create(nullptr, &emptyJob);
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for (size_t i = 0; i < 4095; i++) {
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js.run(js.create(root, &emptyJob), JobSystem::DONT_SIGNAL);
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}
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js.runAndWait(root);
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}
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}
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state.SetItemsProcessed((int64_t)state.iterations() * 4096);
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js.emancipate();
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}
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static void BM_JobSystemParallelFor(benchmark::State& state) {
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JobSystem js;
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js.adopt();
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{
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PerformanceCounters pc(state);
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for (auto _ : state) {
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auto job = jobs::parallel_for(js, nullptr, 0, 4096,
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[](uint32_t start, uint32_t count) { }, jobs::CountSplitter<1>());
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js.runAndWait(job);
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}
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}
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state.SetItemsProcessed((int64_t)state.iterations() * 4096);
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js.emancipate();
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}
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BENCHMARK(BM_JobSystem);
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BENCHMARK(BM_JobSystemAsChildren4k);
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BENCHMARK(BM_JobSystemParallelFor);
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