| /* benchmark_compare256_rle.cc -- benchmark compare256_rle variants |
| * Copyright (C) 2022 Nathan Moinvaziri |
| * For conditions of distribution and use, see copyright notice in zlib.h |
| */ |
| |
| #include <stdio.h> |
| |
| #include <benchmark/benchmark.h> |
| |
| extern "C" { |
| # include "zbuild.h" |
| # include "zutil_p.h" |
| # include "compare256_rle.h" |
| # include "cpu_features.h" |
| } |
| |
| #define MAX_COMPARE_SIZE (256) |
| |
| class compare256_rle: public benchmark::Fixture { |
| private: |
| uint8_t *str1; |
| uint8_t *str2; |
| |
| public: |
| void SetUp(const ::benchmark::State& state) { |
| str1 = (uint8_t *)zng_alloc(MAX_COMPARE_SIZE); |
| assert(str1 != NULL); |
| memset(str1, 'a', MAX_COMPARE_SIZE); |
| |
| str2 = (uint8_t *)zng_alloc(MAX_COMPARE_SIZE); |
| assert(str2 != NULL); |
| memset(str2, 'a', MAX_COMPARE_SIZE); |
| } |
| |
| void Bench(benchmark::State& state, compare256_rle_func compare256_rle) { |
| int32_t match_len = (int32_t)state.range(0); |
| uint32_t len; |
| |
| str2[match_len] = 0; |
| for (auto _ : state) { |
| len = compare256_rle((const uint8_t *)str1, (const uint8_t *)str2); |
| } |
| str2[match_len] = 'a'; |
| |
| benchmark::DoNotOptimize(len); |
| } |
| |
| void TearDown(const ::benchmark::State& state) { |
| zng_free(str1); |
| zng_free(str2); |
| } |
| }; |
| |
| #define BENCHMARK_COMPARE256_RLE(name, fptr, support_flag) \ |
| BENCHMARK_DEFINE_F(compare256_rle, name)(benchmark::State& state) { \ |
| if (!support_flag) { \ |
| state.SkipWithError("CPU does not support " #name); \ |
| } \ |
| Bench(state, fptr); \ |
| } \ |
| BENCHMARK_REGISTER_F(compare256_rle, name)->Range(1, MAX_COMPARE_SIZE); |
| |
| BENCHMARK_COMPARE256_RLE(c, compare256_rle_c, 1); |
| |
| #ifdef UNALIGNED_OK |
| BENCHMARK_COMPARE256_RLE(unaligned_16, compare256_rle_unaligned_16, 1); |
| #ifdef HAVE_BUILTIN_CTZ |
| BENCHMARK_COMPARE256_RLE(unaligned_32, compare256_rle_unaligned_32, 1); |
| #endif |
| #if defined(UNALIGNED64_OK) && defined(HAVE_BUILTIN_CTZLL) |
| BENCHMARK_COMPARE256_RLE(unaligned_64, compare256_rle_unaligned_64, 1); |
| #endif |
| #endif |