| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <string.h> |
| 4 | |
| 5 | #include "memcpy.h" |
| 6 | #include "rand.h" |
| 7 | #include "../fio_time.h" |
| 8 | #include "../gettime.h" |
| 9 | #include "../fio.h" |
| 10 | |
| 11 | #define BUF_SIZE 32 * 1024 * 1024ULL |
| 12 | |
| 13 | #define NR_ITERS 64 |
| 14 | |
| 15 | struct memcpy_test { |
| 16 | const char *name; |
| 17 | void *src; |
| 18 | void *dst; |
| 19 | size_t size; |
| 20 | }; |
| 21 | |
| 22 | static struct memcpy_test tests[] = { |
| 23 | { |
| 24 | .name = "8 bytes", |
| 25 | .size = 8, |
| 26 | }, |
| 27 | { |
| 28 | .name = "16 bytes", |
| 29 | .size = 16, |
| 30 | }, |
| 31 | { |
| 32 | .name = "96 bytes", |
| 33 | .size = 96, |
| 34 | }, |
| 35 | { |
| 36 | .name = "128 bytes", |
| 37 | .size = 128, |
| 38 | }, |
| 39 | { |
| 40 | .name = "256 bytes", |
| 41 | .size = 256, |
| 42 | }, |
| 43 | { |
| 44 | .name = "512 bytes", |
| 45 | .size = 512, |
| 46 | }, |
| 47 | { |
| 48 | .name = "2048 bytes", |
| 49 | .size = 2048, |
| 50 | }, |
| 51 | { |
| 52 | .name = "8192 bytes", |
| 53 | .size = 8192, |
| 54 | }, |
| 55 | { |
| 56 | .name = "131072 bytes", |
| 57 | .size = 131072, |
| 58 | }, |
| 59 | { |
| 60 | .name = "262144 bytes", |
| 61 | .size = 262144, |
| 62 | }, |
| 63 | { |
| 64 | .name = "524288 bytes", |
| 65 | .size = 524288, |
| 66 | }, |
| 67 | { |
| 68 | .name = NULL, |
| 69 | }, |
| 70 | }; |
| 71 | |
| 72 | struct memcpy_type { |
| 73 | const char *name; |
| 74 | unsigned int mask; |
| 75 | void (*fn)(struct memcpy_test *); |
| 76 | }; |
| 77 | |
| 78 | enum { |
| 79 | T_MEMCPY = 1U << 0, |
| 80 | T_MEMMOVE = 1U << 1, |
| 81 | T_SIMPLE = 1U << 2, |
| 82 | T_HYBRID = 1U << 3, |
| 83 | }; |
| 84 | |
| 85 | #define do_test(test, fn) do { \ |
| 86 | size_t left, this; \ |
| 87 | void *src, *dst; \ |
| 88 | int i; \ |
| 89 | \ |
| 90 | for (i = 0; i < NR_ITERS; i++) { \ |
| 91 | left = BUF_SIZE; \ |
| 92 | src = test->src; \ |
| 93 | dst = test->dst; \ |
| 94 | while (left) { \ |
| 95 | this = test->size; \ |
| 96 | if (this > left) \ |
| 97 | this = left; \ |
| 98 | (fn)(dst, src, this); \ |
| 99 | left -= this; \ |
| 100 | src += this; \ |
| 101 | dst += this; \ |
| 102 | } \ |
| 103 | } \ |
| 104 | } while (0) |
| 105 | |
| 106 | static void t_memcpy(struct memcpy_test *test) |
| 107 | { |
| 108 | do_test(test, memcpy); |
| 109 | } |
| 110 | |
| 111 | static void t_memmove(struct memcpy_test *test) |
| 112 | { |
| 113 | do_test(test, memmove); |
| 114 | } |
| 115 | |
| 116 | static void simple_memcpy(void *dst, void const *src, size_t len) |
| 117 | { |
| 118 | char *d = dst; |
| 119 | const char *s = src; |
| 120 | |
| 121 | while (len--) |
| 122 | *d++ = *s++; |
| 123 | } |
| 124 | |
| 125 | static void t_simple(struct memcpy_test *test) |
| 126 | { |
| 127 | do_test(test, simple_memcpy); |
| 128 | } |
| 129 | |
| 130 | static void t_hybrid(struct memcpy_test *test) |
| 131 | { |
| 132 | if (test->size >= 64) |
| 133 | do_test(test, simple_memcpy); |
| 134 | else |
| 135 | do_test(test, memcpy); |
| 136 | } |
| 137 | |
| 138 | static struct memcpy_type t[] = { |
| 139 | { |
| 140 | .name = "memcpy", |
| 141 | .mask = T_MEMCPY, |
| 142 | .fn = t_memcpy, |
| 143 | }, |
| 144 | { |
| 145 | .name = "memmove", |
| 146 | .mask = T_MEMMOVE, |
| 147 | .fn = t_memmove, |
| 148 | }, |
| 149 | { |
| 150 | .name = "simple", |
| 151 | .mask = T_SIMPLE, |
| 152 | .fn = t_simple, |
| 153 | }, |
| 154 | { |
| 155 | .name = "hybrid", |
| 156 | .mask = T_HYBRID, |
| 157 | .fn = t_hybrid, |
| 158 | }, |
| 159 | { |
| 160 | .name = NULL, |
| 161 | }, |
| 162 | }; |
| 163 | |
| 164 | static unsigned int get_test_mask(const char *type) |
| 165 | { |
| 166 | char *ostr, *str = strdup(type); |
| 167 | unsigned int mask; |
| 168 | char *name; |
| 169 | int i; |
| 170 | |
| 171 | ostr = str; |
| 172 | mask = 0; |
| 173 | while ((name = strsep(&str, ",")) != NULL) { |
| 174 | for (i = 0; t[i].name; i++) { |
| 175 | if (!strcmp(t[i].name, name)) { |
| 176 | mask |= t[i].mask; |
| 177 | break; |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | free(ostr); |
| 183 | return mask; |
| 184 | } |
| 185 | |
| 186 | static int list_types(void) |
| 187 | { |
| 188 | int i; |
| 189 | |
| 190 | for (i = 0; t[i].name; i++) |
| 191 | printf("%s\n", t[i].name); |
| 192 | |
| 193 | return 1; |
| 194 | } |
| 195 | |
| 196 | static int setup_tests(void) |
| 197 | { |
| 198 | struct memcpy_test *test; |
| 199 | struct frand_state state; |
| 200 | void *src, *dst; |
| 201 | int i; |
| 202 | |
| 203 | src = malloc(BUF_SIZE); |
| 204 | dst = malloc(BUF_SIZE); |
| 205 | if (!src || !dst) { |
| 206 | free(src); |
| 207 | free(dst); |
| 208 | return 1; |
| 209 | } |
| 210 | |
| 211 | init_rand_seed(&state, 0x8989, 0); |
| 212 | fill_random_buf(&state, src, BUF_SIZE); |
| 213 | |
| 214 | for (i = 0; tests[i].name; i++) { |
| 215 | test = &tests[i]; |
| 216 | test->src = src; |
| 217 | test->dst = dst; |
| 218 | } |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static void free_tests(void) |
| 224 | { |
| 225 | free(tests[0].src); |
| 226 | free(tests[0].dst); |
| 227 | } |
| 228 | |
| 229 | int fio_memcpy_test(const char *type) |
| 230 | { |
| 231 | unsigned int test_mask = 0; |
| 232 | int j, i; |
| 233 | |
| 234 | if (!type) |
| 235 | test_mask = ~0U; |
| 236 | else if (!strcmp(type, "help") || !strcmp(type, "list")) |
| 237 | return list_types(); |
| 238 | else |
| 239 | test_mask = get_test_mask(type); |
| 240 | |
| 241 | if (!test_mask) { |
| 242 | fprintf(stderr, "fio: unknown hash `%s`. Available:\n", type); |
| 243 | return list_types(); |
| 244 | } |
| 245 | |
| 246 | if (setup_tests()) { |
| 247 | fprintf(stderr, "setting up mem regions failed\n"); |
| 248 | return 1; |
| 249 | } |
| 250 | |
| 251 | for (i = 0; t[i].name; i++) { |
| 252 | struct timespec ts; |
| 253 | double mb_sec; |
| 254 | uint64_t usec; |
| 255 | |
| 256 | if (!(t[i].mask & test_mask)) |
| 257 | continue; |
| 258 | |
| 259 | /* |
| 260 | * For first run, make sure CPUs are spun up and that |
| 261 | * we've touched the data. |
| 262 | */ |
| 263 | usec_spin(100000); |
| 264 | t[i].fn(&tests[0]); |
| 265 | |
| 266 | printf("%s\n", t[i].name); |
| 267 | |
| 268 | for (j = 0; tests[j].name; j++) { |
| 269 | fio_gettime(&ts, NULL); |
| 270 | t[i].fn(&tests[j]); |
| 271 | usec = utime_since_now(&ts); |
| 272 | |
| 273 | if (usec) { |
| 274 | unsigned long long mb = NR_ITERS * BUF_SIZE; |
| 275 | |
| 276 | mb_sec = (double) mb / (double) usec; |
| 277 | mb_sec /= (1.024 * 1.024); |
| 278 | printf("\t%s:\t%8.2f MiB/sec\n", tests[j].name, mb_sec); |
| 279 | } else |
| 280 | printf("\t%s:inf MiB/sec\n", tests[j].name); |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | free_tests(); |
| 285 | return 0; |
| 286 | } |