1 /* 2 * memset benchmark. 3 * 4 * Copyright (c) 2021, Arm Limited. 5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception 6 */ 7 8 #define _GNU_SOURCE 9 #include <stdint.h> 10 #include <stdio.h> 11 #include <string.h> 12 #include <assert.h> 13 #include "stringlib.h" 14 #include "benchlib.h" 15 16 #define ITERS 5000 17 #define ITERS2 20000000 18 #define ITERS3 1000000 19 #define NUM_TESTS 16384 20 #define MIN_SIZE 32768 21 #define MAX_SIZE (1024 * 1024) 22 23 static uint8_t a[MAX_SIZE + 4096] __attribute__((__aligned__(4096))); 24 25 #define DOTEST(STR,TESTFN) \ 26 printf (STR); \ 27 RUN (TESTFN, memset); \ 28 RUNA64 (TESTFN, __memset_aarch64); \ 29 RUNSVE (TESTFN, __memset_aarch64_sve); \ 30 RUNMOPS (TESTFN, __memset_mops); \ 31 RUNA32 (TESTFN, __memset_arm); \ 32 printf ("\n"); 33 34 typedef struct { uint32_t offset : 20, len : 12; } memset_test_t; 35 static memset_test_t test_arr[NUM_TESTS]; 36 37 typedef struct { uint16_t size; uint16_t freq; } freq_data_t; 38 typedef struct { uint8_t align; uint16_t freq; } align_data_t; 39 40 #define SIZE_NUM 65536 41 #define SIZE_MASK (SIZE_NUM-1) 42 static uint8_t len_arr[SIZE_NUM]; 43 44 /* Frequency data for memset sizes up to 4096 based on SPEC2017. */ 45 static freq_data_t memset_len_freq[] = 46 { 47 {40,28817}, {32,15336}, { 16,3823}, {296,3545}, { 24,3454}, { 8,1412}, 48 {292,1202}, { 48, 927}, { 12, 613}, { 11, 539}, {284, 493}, {108, 414}, 49 { 88, 380}, { 20, 295}, {312, 271}, { 72, 233}, { 2, 200}, { 4, 192}, 50 { 15, 180}, { 14, 174}, { 13, 160}, { 56, 151}, { 36, 144}, { 64, 140}, 51 {4095,133}, { 10, 130}, { 9, 124}, { 3, 124}, { 28, 120}, { 0, 118}, 52 {288, 110}, {1152, 96}, {104, 90}, { 1, 86}, {832, 76}, {248, 74}, 53 {1024, 69}, {120, 64}, {512, 63}, {384, 60}, { 6, 59}, { 80, 54}, 54 { 17, 50}, { 7, 49}, {520, 47}, {2048, 39}, {256, 37}, {864, 33}, 55 {1440, 28}, { 22, 27}, {2056, 24}, {260, 23}, { 68, 23}, { 5, 22}, 56 { 18, 21}, {200, 18}, {2120, 18}, { 60, 17}, { 52, 16}, {336, 15}, 57 { 44, 13}, {192, 13}, {160, 12}, {2064, 12}, {128, 12}, { 76, 11}, 58 {164, 11}, {152, 10}, {136, 9}, {488, 7}, { 96, 6}, {560, 6}, 59 {1016, 6}, {112, 5}, {232, 5}, {168, 5}, {952, 5}, {184, 5}, 60 {144, 4}, {252, 4}, { 84, 3}, {960, 3}, {3808, 3}, {244, 3}, 61 {280, 3}, {224, 3}, {156, 3}, {1088, 3}, {440, 3}, {216, 2}, 62 {304, 2}, { 23, 2}, { 25, 2}, { 26, 2}, {264, 2}, {328, 2}, 63 {1096, 2}, {240, 2}, {1104, 2}, {704, 2}, {1664, 2}, {360, 2}, 64 {808, 1}, {544, 1}, {236, 1}, {720, 1}, {368, 1}, {424, 1}, 65 {640, 1}, {1112, 1}, {552, 1}, {272, 1}, {776, 1}, {376, 1}, 66 { 92, 1}, {536, 1}, {824, 1}, {496, 1}, {760, 1}, {792, 1}, 67 {504, 1}, {344, 1}, {1816, 1}, {880, 1}, {176, 1}, {320, 1}, 68 {352, 1}, {2008, 1}, {208, 1}, {408, 1}, {228, 1}, {2072, 1}, 69 {568, 1}, {220, 1}, {616, 1}, {600, 1}, {392, 1}, {696, 1}, 70 {2144, 1}, {1280, 1}, {2136, 1}, {632, 1}, {584, 1}, {456, 1}, 71 {472, 1}, {3440, 1}, {2088, 1}, {680, 1}, {2928, 1}, {212, 1}, 72 {648, 1}, {1752, 1}, {664, 1}, {3512, 1}, {1032, 1}, {528, 1}, 73 {4072, 1}, {204, 1}, {2880, 1}, {3392, 1}, {712, 1}, { 59, 1}, 74 {736, 1}, {592, 1}, {2520, 1}, {744, 1}, {196, 1}, {172, 1}, 75 {728, 1}, {2040, 1}, {1192, 1}, {3600, 1}, {0, 0} 76 }; 77 78 #define ALIGN_NUM 1024 79 #define ALIGN_MASK (ALIGN_NUM-1) 80 static uint8_t align_arr[ALIGN_NUM]; 81 82 /* Alignment data for memset based on SPEC2017. */ 83 static align_data_t memset_align_freq[] = 84 { 85 {16, 338}, {8, 307}, {32, 148}, {64, 131}, {4, 72}, {1, 23}, {2, 5}, {0, 0} 86 }; 87 88 static void 89 init_memset_distribution (void) 90 { 91 int i, j, freq, size, n; 92 93 for (n = i = 0; (freq = memset_len_freq[i].freq) != 0; i++) 94 for (j = 0, size = memset_len_freq[i].size; j < freq; j++) 95 len_arr[n++] = size; 96 assert (n == SIZE_NUM); 97 98 for (n = i = 0; (freq = memset_align_freq[i].freq) != 0; i++) 99 for (j = 0, size = memset_align_freq[i].align; j < freq; j++) 100 align_arr[n++] = size - 1; 101 assert (n == ALIGN_NUM); 102 } 103 104 static size_t 105 init_memset (size_t max_size) 106 { 107 size_t total = 0; 108 /* Create a random set of memsets with the given size and alignment 109 distributions. */ 110 for (int i = 0; i < NUM_TESTS; i++) 111 { 112 test_arr[i].offset = (rand32 (0) & (max_size - 1)); 113 test_arr[i].offset &= ~align_arr[rand32 (0) & ALIGN_MASK]; 114 test_arr[i].len = len_arr[rand32 (0) & SIZE_MASK]; 115 total += test_arr[i].len; 116 } 117 118 return total; 119 } 120 121 static void inline __attribute ((always_inline)) 122 memset_random (const char *name, void *(*set)(void *, int, size_t)) 123 { 124 uint64_t total_size = 0; 125 uint64_t tsum = 0; 126 printf ("%22s ", name); 127 rand32 (0x12345678); 128 129 for (int size = MIN_SIZE; size <= MAX_SIZE; size *= 2) 130 { 131 uint64_t memset_size = init_memset (size) * ITERS; 132 133 for (int c = 0; c < NUM_TESTS; c++) 134 set (a + test_arr[c].offset, 0, test_arr[c].len); 135 136 uint64_t t = clock_get_ns (); 137 for (int i = 0; i < ITERS; i++) 138 for (int c = 0; c < NUM_TESTS; c++) 139 set (a + test_arr[c].offset, 0, test_arr[c].len); 140 t = clock_get_ns () - t; 141 total_size += memset_size; 142 tsum += t; 143 printf ("%dK: %5.2f ", size / 1024, (double)memset_size / t); 144 } 145 printf( "avg %5.2f\n", (double)total_size / tsum); 146 } 147 148 static void inline __attribute ((always_inline)) 149 memset_medium (const char *name, void *(*set)(void *, int, size_t)) 150 { 151 printf ("%22s ", name); 152 153 for (int size = 8; size <= 512; size *= 2) 154 { 155 uint64_t t = clock_get_ns (); 156 for (int i = 0; i < ITERS2; i++) 157 set (a, 0, size); 158 t = clock_get_ns () - t; 159 printf ("%dB: %5.2f ", size, (double)size * ITERS2 / t); 160 } 161 printf ("\n"); 162 } 163 164 static void inline __attribute ((always_inline)) 165 memset_large (const char *name, void *(*set)(void *, int, size_t)) 166 { 167 printf ("%22s ", name); 168 169 for (int size = 1024; size <= 65536; size *= 2) 170 { 171 uint64_t t = clock_get_ns (); 172 for (int i = 0; i < ITERS3; i++) 173 set (a, 0, size); 174 t = clock_get_ns () - t; 175 printf ("%dKB: %6.2f ", size / 1024, (double)size * ITERS3 / t); 176 } 177 printf ("\n"); 178 } 179 180 int main (void) 181 { 182 init_memset_distribution (); 183 184 memset (a, 1, sizeof (a)); 185 186 DOTEST ("Random memset (bytes/ns):\n", memset_random); 187 DOTEST ("Medium memset (bytes/ns):\n", memset_medium); 188 DOTEST ("Large memset (bytes/ns):\n", memset_large); 189 return 0; 190 } 191