1 /* 2 * memcpy benchmark. 3 * 4 * Copyright (c) 2020-2023, 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 200000 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 + 64] __attribute__((__aligned__(4096))); 24 static uint8_t b[MAX_SIZE + 4096 + 64] __attribute__((__aligned__(4096))); 25 26 #define DOTEST(STR,TESTFN) \ 27 printf (STR); \ 28 RUN (TESTFN, memcpy); \ 29 RUNA64 (TESTFN, __memcpy_aarch64); \ 30 RUNA64 (TESTFN, __memcpy_aarch64_simd); \ 31 RUNSVE (TESTFN, __memcpy_aarch64_sve); \ 32 RUNMOPS (TESTFN, __memcpy_aarch64_mops); \ 33 RUNA32 (TESTFN, __memcpy_arm); \ 34 printf ("\n"); 35 36 typedef struct { uint16_t size; uint16_t freq; } freq_data_t; 37 typedef struct { uint8_t align; uint16_t freq; } align_data_t; 38 39 #define SIZE_NUM 65536 40 #define SIZE_MASK (SIZE_NUM-1) 41 static uint8_t size_arr[SIZE_NUM]; 42 43 /* Frequency data for memcpy of less than 4096 bytes based on SPEC2017. */ 44 static freq_data_t size_freq[] = 45 { 46 {32,22320}, { 16,9554}, { 8,8915}, {152,5327}, { 4,2159}, {292,2035}, 47 { 12,1608}, { 24,1343}, {1152,895}, {144, 813}, {884, 733}, {284, 721}, 48 {120, 661}, { 2, 649}, {882, 550}, { 5, 475}, { 7, 461}, {108, 460}, 49 { 10, 361}, { 9, 361}, { 6, 334}, { 3, 326}, {464, 308}, {2048,303}, 50 { 1, 298}, { 64, 250}, { 11, 197}, {296, 194}, { 68, 187}, { 15, 185}, 51 {192, 184}, {1764,183}, { 13, 173}, {560, 126}, {160, 115}, {288, 96}, 52 {104, 96}, {1144, 83}, { 18, 80}, { 23, 78}, { 40, 77}, { 19, 68}, 53 { 48, 63}, { 17, 57}, { 72, 54}, {1280, 51}, { 20, 49}, { 28, 47}, 54 { 22, 46}, {640, 45}, { 25, 41}, { 14, 40}, { 56, 37}, { 27, 35}, 55 { 35, 33}, {384, 33}, { 29, 32}, { 80, 30}, {4095, 22}, {232, 22}, 56 { 36, 19}, {184, 17}, { 21, 17}, {256, 16}, { 44, 15}, { 26, 15}, 57 { 31, 14}, { 88, 14}, {176, 13}, { 33, 12}, {1024, 12}, {208, 11}, 58 { 62, 11}, {128, 10}, {704, 10}, {324, 10}, { 96, 10}, { 60, 9}, 59 {136, 9}, {124, 9}, { 34, 8}, { 30, 8}, {480, 8}, {1344, 8}, 60 {273, 7}, {520, 7}, {112, 6}, { 52, 6}, {344, 6}, {336, 6}, 61 {504, 5}, {168, 5}, {424, 5}, { 0, 4}, { 76, 3}, {200, 3}, 62 {512, 3}, {312, 3}, {240, 3}, {960, 3}, {264, 2}, {672, 2}, 63 { 38, 2}, {328, 2}, { 84, 2}, { 39, 2}, {216, 2}, { 42, 2}, 64 { 37, 2}, {1608, 2}, { 70, 2}, { 46, 2}, {536, 2}, {280, 1}, 65 {248, 1}, { 47, 1}, {1088, 1}, {1288, 1}, {224, 1}, { 41, 1}, 66 { 50, 1}, { 49, 1}, {808, 1}, {360, 1}, {440, 1}, { 43, 1}, 67 { 45, 1}, { 78, 1}, {968, 1}, {392, 1}, { 54, 1}, { 53, 1}, 68 { 59, 1}, {376, 1}, {664, 1}, { 58, 1}, {272, 1}, { 66, 1}, 69 {2688, 1}, {472, 1}, {568, 1}, {720, 1}, { 51, 1}, { 63, 1}, 70 { 86, 1}, {496, 1}, {776, 1}, { 57, 1}, {680, 1}, {792, 1}, 71 {122, 1}, {760, 1}, {824, 1}, {552, 1}, { 67, 1}, {456, 1}, 72 {984, 1}, { 74, 1}, {408, 1}, { 75, 1}, { 92, 1}, {576, 1}, 73 {116, 1}, { 65, 1}, {117, 1}, { 82, 1}, {352, 1}, { 55, 1}, 74 {100, 1}, { 90, 1}, {696, 1}, {111, 1}, {880, 1}, { 79, 1}, 75 {488, 1}, { 61, 1}, {114, 1}, { 94, 1}, {1032, 1}, { 98, 1}, 76 { 87, 1}, {584, 1}, { 85, 1}, {648, 1}, {0, 0} 77 }; 78 79 #define ALIGN_NUM 1024 80 #define ALIGN_MASK (ALIGN_NUM-1) 81 static uint8_t src_align_arr[ALIGN_NUM]; 82 static uint8_t dst_align_arr[ALIGN_NUM]; 83 84 /* Source alignment frequency for memcpy based on SPEC2017. */ 85 static align_data_t src_align_freq[] = 86 { 87 {8, 300}, {16, 292}, {32, 168}, {64, 153}, {4, 79}, {2, 14}, {1, 18}, {0, 0} 88 }; 89 90 static align_data_t dst_align_freq[] = 91 { 92 {8, 265}, {16, 263}, {64, 209}, {32, 174}, {4, 90}, {2, 10}, {1, 13}, {0, 0} 93 }; 94 95 typedef struct 96 { 97 uint64_t src : 24; 98 uint64_t dst : 24; 99 uint64_t len : 16; 100 } copy_t; 101 102 static copy_t test_arr[NUM_TESTS]; 103 104 typedef char *(*proto_t) (char *, const char *, size_t); 105 106 static void 107 init_copy_distribution (void) 108 { 109 int i, j, freq, size, n; 110 111 for (n = i = 0; (freq = size_freq[i].freq) != 0; i++) 112 for (j = 0, size = size_freq[i].size; j < freq; j++) 113 size_arr[n++] = size; 114 assert (n == SIZE_NUM); 115 116 for (n = i = 0; (freq = src_align_freq[i].freq) != 0; i++) 117 for (j = 0, size = src_align_freq[i].align; j < freq; j++) 118 src_align_arr[n++] = size - 1; 119 assert (n == ALIGN_NUM); 120 121 for (n = i = 0; (freq = dst_align_freq[i].freq) != 0; i++) 122 for (j = 0, size = dst_align_freq[i].align; j < freq; j++) 123 dst_align_arr[n++] = size - 1; 124 assert (n == ALIGN_NUM); 125 } 126 127 static size_t 128 init_copies (size_t max_size) 129 { 130 size_t total = 0; 131 /* Create a random set of copies with the given size and alignment 132 distributions. */ 133 for (int i = 0; i < NUM_TESTS; i++) 134 { 135 test_arr[i].dst = (rand32 (0) & (max_size - 1)); 136 test_arr[i].dst &= ~dst_align_arr[rand32 (0) & ALIGN_MASK]; 137 test_arr[i].src = (rand32 (0) & (max_size - 1)); 138 test_arr[i].src &= ~src_align_arr[rand32 (0) & ALIGN_MASK]; 139 test_arr[i].len = size_arr[rand32 (0) & SIZE_MASK]; 140 total += test_arr[i].len; 141 } 142 143 return total; 144 } 145 146 static void inline __attribute ((always_inline)) 147 memcpy_random (const char *name, void *(*fn)(void *, const void *, size_t)) 148 { 149 printf ("%22s ", name); 150 uint64_t total = 0, tsum = 0; 151 for (int size = MIN_SIZE; size <= MAX_SIZE; size *= 2) 152 { 153 uint64_t copy_size = init_copies (size) * ITERS; 154 155 for (int c = 0; c < NUM_TESTS; c++) 156 fn (b + test_arr[c].dst, a + test_arr[c].src, test_arr[c].len); 157 158 uint64_t t = clock_get_ns (); 159 for (int i = 0; i < ITERS; i++) 160 for (int c = 0; c < NUM_TESTS; c++) 161 fn (b + test_arr[c].dst, a + test_arr[c].src, test_arr[c].len); 162 t = clock_get_ns () - t; 163 total += copy_size; 164 tsum += t; 165 printf ("%dK: %5.2f ", size / 1024, (double)copy_size / t); 166 } 167 printf( "avg %5.2f\n", (double)total / tsum); 168 } 169 170 static void inline __attribute ((always_inline)) 171 memcpy_medium_aligned (const char *name, void *(*fn)(void *, const void *, size_t)) 172 { 173 printf ("%22s ", name); 174 175 for (int size = 8; size <= 512; size *= 2) 176 { 177 uint64_t t = clock_get_ns (); 178 for (int i = 0; i < ITERS2; i++) 179 fn (b, a, size); 180 t = clock_get_ns () - t; 181 printf ("%dB: %5.2f ", size, (double)size * ITERS2 / t); 182 } 183 printf ("\n"); 184 } 185 186 static void inline __attribute ((always_inline)) 187 memcpy_medium_unaligned (const char *name, void *(*fn)(void *, const void *, size_t)) 188 { 189 printf ("%22s ", name); 190 191 for (int size = 8; size <= 512; size *= 2) 192 { 193 uint64_t t = clock_get_ns (); 194 for (int i = 0; i < ITERS2; i++) 195 fn (b + 3, a + 1, size); 196 t = clock_get_ns () - t; 197 printf ("%dB: %5.2f ", size, (double)size * ITERS2 / t); 198 } 199 printf ("\n"); 200 } 201 202 static void inline __attribute ((always_inline)) 203 memcpy_large (const char *name, void *(*fn)(void *, const void *, size_t)) 204 { 205 printf ("%22s ", name); 206 207 for (int size = 1024; size <= 65536; size *= 2) 208 { 209 uint64_t t = clock_get_ns (); 210 for (int i = 0; i < ITERS3; i++) 211 fn (b, a, size); 212 t = clock_get_ns () - t; 213 printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t); 214 } 215 printf ("\n"); 216 } 217 218 static void inline __attribute ((always_inline)) 219 memmove_forward_unaligned (const char *name, void *(*fn)(void *, const void *, size_t)) 220 { 221 printf ("%22s ", name); 222 223 for (int size = 1024; size <= 65536; size *= 2) 224 { 225 uint64_t t = clock_get_ns (); 226 for (int i = 0; i < ITERS3; i++) 227 fn (a, a + 256 + (i & 31), size); 228 t = clock_get_ns () - t; 229 printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t); 230 } 231 232 printf ("\n"); 233 } 234 235 static void inline __attribute ((always_inline)) 236 memmove_backward_unaligned (const char *name, void *(*fn)(void *, const void *, size_t)) 237 { 238 printf ("%22s ", name); 239 240 for (int size = 1024; size <= 65536; size *= 2) 241 { 242 uint64_t t = clock_get_ns (); 243 for (int i = 0; i < ITERS3; i++) 244 fn (a + 256 + (i & 31), a, size); 245 t = clock_get_ns () - t; 246 printf ("%dK: %5.2f ", size / 1024, (double)size * ITERS3 / t); 247 } 248 249 printf ("\n"); 250 } 251 252 int main (void) 253 { 254 init_copy_distribution (); 255 256 memset (a, 1, sizeof (a)); 257 memset (b, 2, sizeof (b)); 258 259 DOTEST ("Random memcpy (bytes/ns):\n", memcpy_random); 260 DOTEST ("Medium memcpy aligned (bytes/ns):\n", memcpy_medium_aligned); 261 DOTEST ("Medium memcpy unaligned (bytes/ns):\n", memcpy_medium_unaligned); 262 DOTEST ("Large memcpy (bytes/ns):\n", memcpy_large); 263 DOTEST ("Forwards memmove unaligned (bytes/ns):\n", memmove_forward_unaligned); 264 DOTEST ("Backwards memmove unaligned (bytes/ns):\n", memmove_backward_unaligned); 265 266 return 0; 267 } 268