foundationdb/flowbench/BenchHash.cpp

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/*
* BenchHash.cpp
*
* This source file is part of the FoundationDB open source project
*
2022-03-22 04:36:23 +08:00
* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
*
* 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 "flow/crc32c.h"
#include "flow/Hash3.h"
#include "flow/xxhash.h"
#include "flowbench/GlobalData.h"
#include <stdint.h>
enum class HashType {
HashLittle2,
CRC32C,
XXHash3,
};
template <HashType hashType>
inline void hash(const KeyRef& key, size_t length) {}
template <>
inline void hash<HashType::HashLittle2>(const KeyRef& key, size_t length) {
uint32_t part1;
uint32_t part2;
hashlittle2(key.begin(), length, &part1, &part2);
benchmark::DoNotOptimize(part1);
benchmark::DoNotOptimize(part2);
}
template <>
inline void hash<HashType::CRC32C>(const KeyRef& key, size_t length) {
benchmark::DoNotOptimize(crc32c_append(0xfdbeefdb, key.begin(), length));
}
template <>
inline void hash<HashType::XXHash3>(const KeyRef& key, size_t length) {
benchmark::DoNotOptimize(XXH3_64bits(key.begin(), length));
}
template <HashType hashType>
static void bench_hash(benchmark::State& state) {
auto length = 1 << state.range(0);
auto key = getKey(length);
while (state.KeepRunning()) {
hash<hashType>(key, length);
}
state.SetItemsProcessed(static_cast<long>(state.iterations()));
}
BENCHMARK_TEMPLATE(bench_hash, HashType::CRC32C)->DenseRange(2, 18)->ReportAggregatesOnly(true);
BENCHMARK_TEMPLATE(bench_hash, HashType::HashLittle2)->DenseRange(2, 18)->ReportAggregatesOnly(true);
BENCHMARK_TEMPLATE(bench_hash, HashType::XXHash3)->DenseRange(2, 18)->ReportAggregatesOnly(true);