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/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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 <err.h>
#include <stdint.h>
#include <string>
#include <android-base/file.h>
#include <android-base/stringprintf.h>
#include <benchmark/benchmark.h>
#include <unwindstack/Maps.h>
class BenchmarkLocalUpdatableMaps : public unwindstack::LocalUpdatableMaps {
public:
BenchmarkLocalUpdatableMaps() : unwindstack::LocalUpdatableMaps() {}
virtual ~BenchmarkLocalUpdatableMaps() = default;
const std::string GetMapsFile() const override { return maps_file_; }
void BenchmarkSetMapsFile(const std::string& maps_file) { maps_file_ = maps_file; }
private:
std::string maps_file_;
};
static constexpr size_t kNumSmallMaps = 100;
static constexpr size_t kNumLargeMaps = 10000;
static void CreateMap(const char* filename, size_t num_maps, size_t increment = 1) {
std::string maps;
for (size_t i = 0; i < num_maps; i += increment) {
maps += android::base::StringPrintf("%zu-%zu r-xp 0000 00:00 0 name%zu\n", i * 1000,
(i + 1) * 1000 * increment, i * increment);
}
if (!android::base::WriteStringToFile(maps, filename)) {
errx(1, "WriteStringToFile failed");
}
}
static void ReparseBenchmark(benchmark::State& state, const char* maps1, size_t maps1_total,
const char* maps2, size_t maps2_total) {
for (const auto& _ : state) {
BenchmarkLocalUpdatableMaps maps;
maps.BenchmarkSetMapsFile(maps1);
if (!maps.Reparse()) {
errx(1, "Internal Error: reparse of initial maps filed.");
}
if (maps.Total() != maps1_total) {
errx(1, "Internal Error: Incorrect total number of maps %zu, expected %zu.", maps.Total(),
maps1_total);
}
maps.BenchmarkSetMapsFile(maps2);
if (!maps.Reparse()) {
errx(1, "Internal Error: reparse of second set of maps filed.");
}
if (maps.Total() != maps2_total) {
errx(1, "Internal Error: Incorrect total number of maps %zu, expected %zu.", maps.Total(),
maps2_total);
}
}
}
void BM_local_updatable_maps_reparse_double_initial_small(benchmark::State& state) {
TemporaryFile initial_maps;
CreateMap(initial_maps.path, kNumSmallMaps, 2);
TemporaryFile reparse_maps;
CreateMap(reparse_maps.path, kNumSmallMaps);
ReparseBenchmark(state, initial_maps.path, kNumSmallMaps / 2, reparse_maps.path, kNumSmallMaps);
}
BENCHMARK(BM_local_updatable_maps_reparse_double_initial_small);
void BM_local_updatable_maps_reparse_double_initial_large(benchmark::State& state) {
TemporaryFile initial_maps;
CreateMap(initial_maps.path, kNumLargeMaps, 2);
TemporaryFile reparse_maps;
CreateMap(reparse_maps.path, kNumLargeMaps);
ReparseBenchmark(state, initial_maps.path, kNumLargeMaps / 2, reparse_maps.path, kNumLargeMaps);
}
BENCHMARK(BM_local_updatable_maps_reparse_double_initial_large);
void BM_local_updatable_maps_reparse_same_maps_small(benchmark::State& state) {
static constexpr size_t kNumSmallMaps = 100;
TemporaryFile maps;
CreateMap(maps.path, kNumSmallMaps);
ReparseBenchmark(state, maps.path, kNumSmallMaps, maps.path, kNumSmallMaps);
}
BENCHMARK(BM_local_updatable_maps_reparse_same_maps_small);
void BM_local_updatable_maps_reparse_same_maps_large(benchmark::State& state) {
TemporaryFile maps;
CreateMap(maps.path, kNumLargeMaps);
ReparseBenchmark(state, maps.path, kNumLargeMaps, maps.path, kNumLargeMaps);
}
BENCHMARK(BM_local_updatable_maps_reparse_same_maps_large);
void BM_local_updatable_maps_reparse_few_extra_small(benchmark::State& state) {
TemporaryFile maps1;
CreateMap(maps1.path, kNumSmallMaps - 4);
TemporaryFile maps2;
CreateMap(maps2.path, kNumSmallMaps);
ReparseBenchmark(state, maps1.path, kNumSmallMaps - 4, maps2.path, kNumSmallMaps);
}
BENCHMARK(BM_local_updatable_maps_reparse_few_extra_small);
void BM_local_updatable_maps_reparse_few_extra_large(benchmark::State& state) {
TemporaryFile maps1;
CreateMap(maps1.path, kNumLargeMaps - 4);
TemporaryFile maps2;
CreateMap(maps2.path, kNumLargeMaps);
ReparseBenchmark(state, maps1.path, kNumLargeMaps - 4, maps2.path, kNumLargeMaps);
}
BENCHMARK(BM_local_updatable_maps_reparse_few_extra_large);
void BM_local_updatable_maps_reparse_few_less_small(benchmark::State& state) {
TemporaryFile maps1;
CreateMap(maps1.path, kNumSmallMaps);
TemporaryFile maps2;
CreateMap(maps2.path, kNumSmallMaps - 4);
ReparseBenchmark(state, maps1.path, kNumSmallMaps, maps2.path, kNumSmallMaps - 4);
}
BENCHMARK(BM_local_updatable_maps_reparse_few_less_small);
void BM_local_updatable_maps_reparse_few_less_large(benchmark::State& state) {
TemporaryFile maps1;
CreateMap(maps1.path, kNumLargeMaps);
TemporaryFile maps2;
CreateMap(maps2.path, kNumLargeMaps - 4);
ReparseBenchmark(state, maps1.path, kNumLargeMaps, maps2.path, kNumLargeMaps - 4);
}
BENCHMARK(BM_local_updatable_maps_reparse_few_less_large);
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