| /* benchmark_crc32.cc -- benchmark crc32 variants |
| * Copyright (C) 2022 Nathan Moinvaziri |
| * For conditions of distribution and use, see copyright notice in zlib.h |
| */ |
| |
| #include <stdio.h> |
| #include <assert.h> |
| |
| #include <benchmark/benchmark.h> |
| |
| extern "C" { |
| # include "zbuild.h" |
| # include "zutil_p.h" |
| # include "cpu_features.h" |
| } |
| |
| #define MAX_RANDOM_INTS (1024 * 1024) |
| #define MAX_RANDOM_INTS_SIZE (MAX_RANDOM_INTS * sizeof(uint32_t)) |
| |
| class crc32: public benchmark::Fixture { |
| private: |
| uint32_t *random_ints; |
| |
| public: |
| void SetUp(const ::benchmark::State& state) { |
| random_ints = (uint32_t *)zng_alloc(MAX_RANDOM_INTS_SIZE); |
| assert(random_ints != NULL); |
| |
| for (int32_t i = 0; i < MAX_RANDOM_INTS; i++) { |
| random_ints[i] = rand(); |
| } |
| } |
| |
| void Bench(benchmark::State& state, crc32_func crc32) { |
| uint32_t hash = 0; |
| |
| for (auto _ : state) { |
| hash = crc32(hash, (const unsigned char *)random_ints, state.range(0)); |
| } |
| |
| benchmark::DoNotOptimize(hash); |
| } |
| |
| void TearDown(const ::benchmark::State& state) { |
| zng_free(random_ints); |
| } |
| }; |
| |
| #define BENCHMARK_CRC32(name, fptr, support_flag) \ |
| BENCHMARK_DEFINE_F(crc32, name)(benchmark::State& state) { \ |
| if (!support_flag) { \ |
| state.SkipWithError("CPU does not support " #name); \ |
| } \ |
| Bench(state, fptr); \ |
| } \ |
| BENCHMARK_REGISTER_F(crc32, name)->Range(1, MAX_RANDOM_INTS_SIZE); |
| |
| BENCHMARK_CRC32(braid, crc32_braid, 1); |
| |
| #ifdef ARM_ACLE_CRC_HASH |
| BENCHMARK_CRC32(acle, crc32_acle, arm_cpu_has_crc32); |
| #elif defined(POWER8_VSX_CRC32) |
| BENCHMARK_CRC32(power8, crc32_power8, power_cpu_has_arch_2_07); |
| #elif defined(S390_CRC32_VX) |
| BENCHMARK_CRC32(vx, PREFIX(s390_crc32_vx), PREFIX(s390_cpu_has_vx)); |
| #elif defined(X86_PCLMULQDQ_CRC) |
| /* CRC32 fold does a memory copy while hashing */ |
| BENCHMARK_CRC32(pclmulqdq, crc32_pclmulqdq, x86_cpu_has_pclmulqdq); |
| #endif |