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Diffstat (limited to 'string/bench/memset.c')
| -rw-r--r-- | string/bench/memset.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/string/bench/memset.c b/string/bench/memset.c new file mode 100644 index 0000000..990e23b --- /dev/null +++ b/string/bench/memset.c @@ -0,0 +1,243 @@ +/* + * memset benchmark. + * + * Copyright (c) 2021, Arm Limited. + * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception + */ + +#define _GNU_SOURCE +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#include <assert.h> +#include "stringlib.h" +#include "benchlib.h" + +#define ITERS 5000 +#define ITERS2 20000000 +#define ITERS3 1000000 +#define NUM_TESTS 16384 +#define MIN_SIZE 32768 +#define MAX_SIZE (1024 * 1024) + +static uint8_t a[MAX_SIZE + 4096] __attribute__((__aligned__(64))); + +#define F(x) {#x, x}, + +static const struct fun +{ + const char *name; + void *(*fun)(void *, int, size_t); +} funtab[] = +{ +#if __aarch64__ + F(__memset_aarch64) +#elif __arm__ + F(__memset_arm) +#endif + F(memset) +#undef F + {0, 0} +}; + +typedef struct { uint32_t offset : 20, len : 12; } memset_test_t; +static memset_test_t test_arr[NUM_TESTS]; + +typedef struct { uint16_t size; uint16_t freq; } freq_data_t; +typedef struct { uint8_t align; uint16_t freq; } align_data_t; + +#define SIZE_NUM 65536 +#define SIZE_MASK (SIZE_NUM-1) +static uint8_t len_arr[SIZE_NUM]; + +/* Frequency data for memset sizes up to 4096 based on SPEC2017. */ +static freq_data_t memset_len_freq[] = +{ +{40,28817}, {32,15336}, { 16,3823}, {296,3545}, { 24,3454}, { 8,1412}, +{292,1202}, { 48, 927}, { 12, 613}, { 11, 539}, {284, 493}, {108, 414}, +{ 88, 380}, { 20, 295}, {312, 271}, { 72, 233}, { 2, 200}, { 4, 192}, +{ 15, 180}, { 14, 174}, { 13, 160}, { 56, 151}, { 36, 144}, { 64, 140}, +{4095,133}, { 10, 130}, { 9, 124}, { 3, 124}, { 28, 120}, { 0, 118}, +{288, 110}, {1152, 96}, {104, 90}, { 1, 86}, {832, 76}, {248, 74}, +{1024, 69}, {120, 64}, {512, 63}, {384, 60}, { 6, 59}, { 80, 54}, +{ 17, 50}, { 7, 49}, {520, 47}, {2048, 39}, {256, 37}, {864, 33}, +{1440, 28}, { 22, 27}, {2056, 24}, {260, 23}, { 68, 23}, { 5, 22}, +{ 18, 21}, {200, 18}, {2120, 18}, { 60, 17}, { 52, 16}, {336, 15}, +{ 44, 13}, {192, 13}, {160, 12}, {2064, 12}, {128, 12}, { 76, 11}, +{164, 11}, {152, 10}, {136, 9}, {488, 7}, { 96, 6}, {560, 6}, +{1016, 6}, {112, 5}, {232, 5}, {168, 5}, {952, 5}, {184, 5}, +{144, 4}, {252, 4}, { 84, 3}, {960, 3}, {3808, 3}, {244, 3}, +{280, 3}, {224, 3}, {156, 3}, {1088, 3}, {440, 3}, {216, 2}, +{304, 2}, { 23, 2}, { 25, 2}, { 26, 2}, {264, 2}, {328, 2}, +{1096, 2}, {240, 2}, {1104, 2}, {704, 2}, {1664, 2}, {360, 2}, +{808, 1}, {544, 1}, {236, 1}, {720, 1}, {368, 1}, {424, 1}, +{640, 1}, {1112, 1}, {552, 1}, {272, 1}, {776, 1}, {376, 1}, +{ 92, 1}, {536, 1}, {824, 1}, {496, 1}, {760, 1}, {792, 1}, +{504, 1}, {344, 1}, {1816, 1}, {880, 1}, {176, 1}, {320, 1}, +{352, 1}, {2008, 1}, {208, 1}, {408, 1}, {228, 1}, {2072, 1}, +{568, 1}, {220, 1}, {616, 1}, {600, 1}, {392, 1}, {696, 1}, +{2144, 1}, {1280, 1}, {2136, 1}, {632, 1}, {584, 1}, {456, 1}, +{472, 1}, {3440, 1}, {2088, 1}, {680, 1}, {2928, 1}, {212, 1}, +{648, 1}, {1752, 1}, {664, 1}, {3512, 1}, {1032, 1}, {528, 1}, +{4072, 1}, {204, 1}, {2880, 1}, {3392, 1}, {712, 1}, { 59, 1}, +{736, 1}, {592, 1}, {2520, 1}, {744, 1}, {196, 1}, {172, 1}, +{728, 1}, {2040, 1}, {1192, 1}, {3600, 1}, {0, 0} +}; + +#define ALIGN_NUM 1024 +#define ALIGN_MASK (ALIGN_NUM-1) +static uint8_t align_arr[ALIGN_NUM]; + +/* Alignment data for memset based on SPEC2017. */ +static align_data_t memset_align_freq[] = +{ + {16, 338}, {8, 307}, {32, 148}, {64, 131}, {4, 72}, {1, 23}, {2, 5}, {0, 0} +}; + +static void +init_memset_distribution (void) +{ + int i, j, freq, size, n; + + for (n = i = 0; (freq = memset_len_freq[i].freq) != 0; i++) + for (j = 0, size = memset_len_freq[i].size; j < freq; j++) + len_arr[n++] = size; + assert (n == SIZE_NUM); + + for (n = i = 0; (freq = memset_align_freq[i].freq) != 0; i++) + for (j = 0, size = memset_align_freq[i].align; j < freq; j++) + align_arr[n++] = size - 1; + assert (n == ALIGN_NUM); +} + +static size_t +init_memset (size_t max_size) +{ + size_t total = 0; + /* Create a random set of memsets with the given size and alignment + distributions. */ + for (int i = 0; i < NUM_TESTS; i++) + { + test_arr[i].offset = (rand32 (0) & (max_size - 1)); + test_arr[i].offset &= ~align_arr[rand32 (0) & ALIGN_MASK]; + test_arr[i].len = len_arr[rand32 (0) & SIZE_MASK]; + total += test_arr[i].len; + } + + return total; +} + + +int main (void) +{ + init_memset_distribution (); + + memset (a, 1, sizeof (a)); + + printf("Random memset (bytes/ns):\n"); + for (int f = 0; funtab[f].name != 0; f++) + { + size_t total_size = 0; + uint64_t tsum = 0; + printf ("%22s ", funtab[f].name); + rand32 (0x12345678); + + for (int size = MIN_SIZE; size <= MAX_SIZE; size *= 2) + { + size_t memset_size = init_memset (size) * ITERS; + + for (int c = 0; c < NUM_TESTS; c++) + funtab[f].fun (a + test_arr[c].offset, 0, test_arr[c].len); + + uint64_t t = clock_get_ns (); + for (int i = 0; i < ITERS; i++) + for (int c = 0; c < NUM_TESTS; c++) + funtab[f].fun (a + test_arr[c].offset, 0, test_arr[c].len); + t = clock_get_ns () - t; + total_size += memset_size; + tsum += t; + printf ("%dK: %.2f ", size / 1024, (double)memset_size / t); + } + printf( "avg %.2f\n", (double)total_size / tsum); + } + + size_t total_size = 0; + uint64_t tsum = 0; + printf ("%22s ", "memset_call"); + rand32 (0x12345678); + + for (int size = MIN_SIZE; size <= MAX_SIZE; size *= 2) + { + size_t memset_size = init_memset (size) * ITERS; + + for (int c = 0; c < NUM_TESTS; c++) + memset (a + test_arr[c].offset, 0, test_arr[c].len); + + uint64_t t = clock_get_ns (); + for (int i = 0; i < ITERS; i++) + for (int c = 0; c < NUM_TESTS; c++) + memset (a + test_arr[c].offset, 0, test_arr[c].len); + t = clock_get_ns () - t; + total_size += memset_size; + tsum += t; + printf ("%dK: %.2f ", size / 1024, (double)memset_size / t); + } + printf( "avg %.2f\n", (double)total_size / tsum); + + + printf ("\nMedium memset (bytes/ns):\n"); + for (int f = 0; funtab[f].name != 0; f++) + { + printf ("%22s ", funtab[f].name); + + for (int size = 8; size <= 512; size *= 2) + { + uint64_t t = clock_get_ns (); + for (int i = 0; i < ITERS2; i++) + funtab[f].fun (a, 0, size); + t = clock_get_ns () - t; + printf ("%dB: %.2f ", size, (double)size * ITERS2 / t); + } + printf ("\n"); + } + + printf ("%22s ", "memset_call"); + for (int size = 8; size <= 512; size *= 2) + { + uint64_t t = clock_get_ns (); + for (int i = 0; i < ITERS2; i++) + memset (a, 0, size); + t = clock_get_ns () - t; + printf ("%dB: %.2f ", size, (double)size * ITERS2 / t); + } + + + printf ("\nLarge memset (bytes/ns):\n"); + for (int f = 0; funtab[f].name != 0; f++) + { + printf ("%22s ", funtab[f].name); + + for (int size = 1024; size <= 65536; size *= 2) + { + uint64_t t = clock_get_ns (); + for (int i = 0; i < ITERS3; i++) + funtab[f].fun (a, 0, size); + t = clock_get_ns () - t; + printf ("%dK: %.2f ", size / 1024, (double)size * ITERS3 / t); + } + printf ("\n"); + } + + printf ("%22s ", "memset_call"); + for (int size = 1024; size <= 65536; size *= 2) + { + uint64_t t = clock_get_ns (); + for (int i = 0; i < ITERS3; i++) + memset (a, 0, size); + t = clock_get_ns () - t; + printf ("%dK: %.2f ", size / 1024, (double)size * ITERS3 / t); + } + printf ("\n\n"); + + return 0; +} |