Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 1 | /* |
| 2 | * mem-memcpy.c |
| 3 | * |
| 4 | * memcpy: Simple memory copy in various ways |
| 5 | * |
| 6 | * Written by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> |
| 7 | */ |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 8 | |
| 9 | #include "../perf.h" |
| 10 | #include "../util/util.h" |
| 11 | #include "../util/parse-options.h" |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 12 | #include "../util/header.h" |
Yann Droneaud | 57480d2 | 2014-06-30 22:28:47 +0200 | [diff] [blame] | 13 | #include "../util/cloexec.h" |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 14 | #include "bench.h" |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 15 | #include "mem-memcpy-arch.h" |
Rabin Vincent | 5bce1a5 | 2014-12-02 16:50:40 +0100 | [diff] [blame] | 16 | #include "mem-memset-arch.h" |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <sys/time.h> |
| 22 | #include <errno.h> |
| 23 | |
| 24 | #define K 1024 |
| 25 | |
Hitoshi Mitake | 12eac0b | 2009-11-20 12:37:17 +0900 | [diff] [blame] | 26 | static const char *length_str = "1MB"; |
| 27 | static const char *routine = "default"; |
Jan Beulich | e3e877e | 2012-01-18 13:29:59 +0000 | [diff] [blame] | 28 | static int iterations = 1; |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 29 | static bool use_cycle; |
| 30 | static int cycle_fd; |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 31 | static bool only_prefault; |
| 32 | static bool no_prefault; |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 33 | |
| 34 | static const struct option options[] = { |
| 35 | OPT_STRING('l', "length", &length_str, "1MB", |
| 36 | "Specify length of memory to copy. " |
Namhyung Kim | 08942f6 | 2012-06-20 15:08:06 +0900 | [diff] [blame] | 37 | "Available units: B, KB, MB, GB and TB (upper and lower)"), |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 38 | OPT_STRING('r', "routine", &routine, "default", |
| 39 | "Specify routine to copy"), |
Jan Beulich | e3e877e | 2012-01-18 13:29:59 +0000 | [diff] [blame] | 40 | OPT_INTEGER('i', "iterations", &iterations, |
| 41 | "repeat memcpy() invocation this number of times"), |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 42 | OPT_BOOLEAN('c', "cycle", &use_cycle, |
Namhyung Kim | 08942f6 | 2012-06-20 15:08:06 +0900 | [diff] [blame] | 43 | "Use cycles event instead of gettimeofday() for measuring"), |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 44 | OPT_BOOLEAN('o', "only-prefault", &only_prefault, |
| 45 | "Show only the result with page faults before memcpy()"), |
| 46 | OPT_BOOLEAN('n', "no-prefault", &no_prefault, |
| 47 | "Show only the result without page faults before memcpy()"), |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 48 | OPT_END() |
| 49 | }; |
| 50 | |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 51 | typedef void *(*memcpy_t)(void *, const void *, size_t); |
Rabin Vincent | 5bce1a5 | 2014-12-02 16:50:40 +0100 | [diff] [blame] | 52 | typedef void *(*memset_t)(void *, int, size_t); |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 53 | |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 54 | struct routine { |
| 55 | const char *name; |
| 56 | const char *desc; |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 57 | union { |
| 58 | memcpy_t memcpy; |
Rabin Vincent | 5bce1a5 | 2014-12-02 16:50:40 +0100 | [diff] [blame] | 59 | memset_t memset; |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 60 | } fn; |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 61 | }; |
| 62 | |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 63 | struct routine memcpy_routines[] = { |
| 64 | { .name = "default", |
| 65 | .desc = "Default memcpy() provided by glibc", |
| 66 | .fn.memcpy = memcpy }, |
Ingo Molnar | 89fe808 | 2013-09-30 12:07:11 +0200 | [diff] [blame] | 67 | #ifdef HAVE_ARCH_X86_64_SUPPORT |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 68 | |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 69 | #define MEMCPY_FN(_fn, _name, _desc) {.name = _name, .desc = _desc, .fn.memcpy = _fn}, |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 70 | #include "mem-memcpy-x86-64-asm-def.h" |
| 71 | #undef MEMCPY_FN |
| 72 | |
| 73 | #endif |
| 74 | |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 75 | { NULL, |
| 76 | NULL, |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 77 | {NULL} } |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 78 | }; |
| 79 | |
| 80 | static const char * const bench_mem_memcpy_usage[] = { |
| 81 | "perf bench mem memcpy <options>", |
| 82 | NULL |
| 83 | }; |
| 84 | |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 85 | static struct perf_event_attr cycle_attr = { |
Hitoshi Mitake | 12eac0b | 2009-11-20 12:37:17 +0900 | [diff] [blame] | 86 | .type = PERF_TYPE_HARDWARE, |
| 87 | .config = PERF_COUNT_HW_CPU_CYCLES |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 88 | }; |
| 89 | |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 90 | static void init_cycle(void) |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 91 | { |
Yann Droneaud | 57480d2 | 2014-06-30 22:28:47 +0200 | [diff] [blame] | 92 | cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, |
| 93 | perf_event_open_cloexec_flag()); |
Hitoshi Mitake | 12eac0b | 2009-11-20 12:37:17 +0900 | [diff] [blame] | 94 | |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 95 | if (cycle_fd < 0 && errno == ENOSYS) |
Hitoshi Mitake | 12eac0b | 2009-11-20 12:37:17 +0900 | [diff] [blame] | 96 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
| 97 | else |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 98 | BUG_ON(cycle_fd < 0); |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 99 | } |
| 100 | |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 101 | static u64 get_cycle(void) |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 102 | { |
| 103 | int ret; |
| 104 | u64 clk; |
| 105 | |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 106 | ret = read(cycle_fd, &clk, sizeof(u64)); |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 107 | BUG_ON(ret != sizeof(u64)); |
| 108 | |
| 109 | return clk; |
| 110 | } |
| 111 | |
| 112 | static double timeval2double(struct timeval *ts) |
| 113 | { |
| 114 | return (double)ts->tv_sec + |
| 115 | (double)ts->tv_usec / (double)1000000; |
| 116 | } |
| 117 | |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 118 | #define pf (no_prefault ? 0 : 1) |
| 119 | |
| 120 | #define print_bps(x) do { \ |
| 121 | if (x < K) \ |
| 122 | printf(" %14lf B/Sec", x); \ |
| 123 | else if (x < K * K) \ |
| 124 | printf(" %14lfd KB/Sec", x / K); \ |
| 125 | else if (x < K * K * K) \ |
| 126 | printf(" %14lf MB/Sec", x / K / K); \ |
| 127 | else \ |
| 128 | printf(" %14lf GB/Sec", x / K / K / K); \ |
| 129 | } while (0) |
| 130 | |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 131 | struct bench_mem_info { |
| 132 | const struct routine *routines; |
| 133 | u64 (*do_cycle)(const struct routine *r, size_t len, bool prefault); |
| 134 | double (*do_gettimeofday)(const struct routine *r, size_t len, bool prefault); |
| 135 | const char *const *usage; |
| 136 | }; |
| 137 | |
Borislav Petkov | 515e23f | 2015-02-26 18:51:37 +0100 | [diff] [blame^] | 138 | static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t len, double totallen) |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 139 | { |
Borislav Petkov | 515e23f | 2015-02-26 18:51:37 +0100 | [diff] [blame^] | 140 | const struct routine *r = &info->routines[r_idx]; |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 141 | double result_bps[2]; |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 142 | u64 result_cycle[2]; |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 143 | |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 144 | result_cycle[0] = result_cycle[1] = 0ULL; |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 145 | result_bps[0] = result_bps[1] = 0.0; |
| 146 | |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 147 | if (bench_format == BENCH_FORMAT_DEFAULT) |
| 148 | printf("# Copying %s Bytes ...\n\n", length_str); |
Hitoshi Mitake | 12eac0b | 2009-11-20 12:37:17 +0900 | [diff] [blame] | 149 | |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 150 | if (!only_prefault && !no_prefault) { |
| 151 | /* show both of results */ |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 152 | if (use_cycle) { |
Borislav Petkov | 515e23f | 2015-02-26 18:51:37 +0100 | [diff] [blame^] | 153 | result_cycle[0] = info->do_cycle(r, len, false); |
| 154 | result_cycle[1] = info->do_cycle(r, len, true); |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 155 | } else { |
Borislav Petkov | 515e23f | 2015-02-26 18:51:37 +0100 | [diff] [blame^] | 156 | result_bps[0] = info->do_gettimeofday(r, len, false); |
| 157 | result_bps[1] = info->do_gettimeofday(r, len, true); |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 158 | } |
Hitoshi Mitake | 12eac0b | 2009-11-20 12:37:17 +0900 | [diff] [blame] | 159 | } else { |
Borislav Petkov | 515e23f | 2015-02-26 18:51:37 +0100 | [diff] [blame^] | 160 | if (use_cycle) |
| 161 | result_cycle[pf] = info->do_cycle(r, len, only_prefault); |
| 162 | else |
| 163 | result_bps[pf] = info->do_gettimeofday(r, len, only_prefault); |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | switch (bench_format) { |
| 167 | case BENCH_FORMAT_DEFAULT: |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 168 | if (!only_prefault && !no_prefault) { |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 169 | if (use_cycle) { |
| 170 | printf(" %14lf Cycle/Byte\n", |
| 171 | (double)result_cycle[0] |
Rabin Vincent | 1182f88 | 2014-12-02 16:50:41 +0100 | [diff] [blame] | 172 | / totallen); |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 173 | printf(" %14lf Cycle/Byte (with prefault)\n", |
| 174 | (double)result_cycle[1] |
Rabin Vincent | 1182f88 | 2014-12-02 16:50:41 +0100 | [diff] [blame] | 175 | / totallen); |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 176 | } else { |
| 177 | print_bps(result_bps[0]); |
| 178 | printf("\n"); |
| 179 | print_bps(result_bps[1]); |
| 180 | printf(" (with prefault)\n"); |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 181 | } |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 182 | } else { |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 183 | if (use_cycle) { |
| 184 | printf(" %14lf Cycle/Byte", |
| 185 | (double)result_cycle[pf] |
Rabin Vincent | 1182f88 | 2014-12-02 16:50:41 +0100 | [diff] [blame] | 186 | / totallen); |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 187 | } else |
| 188 | print_bps(result_bps[pf]); |
| 189 | |
| 190 | printf("%s\n", only_prefault ? " (with prefault)" : ""); |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 191 | } |
| 192 | break; |
| 193 | case BENCH_FORMAT_SIMPLE: |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 194 | if (!only_prefault && !no_prefault) { |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 195 | if (use_cycle) { |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 196 | printf("%lf %lf\n", |
Rabin Vincent | 1182f88 | 2014-12-02 16:50:41 +0100 | [diff] [blame] | 197 | (double)result_cycle[0] / totallen, |
| 198 | (double)result_cycle[1] / totallen); |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 199 | } else { |
| 200 | printf("%lf %lf\n", |
| 201 | result_bps[0], result_bps[1]); |
| 202 | } |
| 203 | } else { |
Hitoshi Mitake | 17d7a11 | 2012-07-02 22:46:17 +0900 | [diff] [blame] | 204 | if (use_cycle) { |
| 205 | printf("%lf\n", (double)result_cycle[pf] |
Rabin Vincent | 1182f88 | 2014-12-02 16:50:41 +0100 | [diff] [blame] | 206 | / totallen); |
Hitoshi Mitake | 49ce8fc | 2010-11-25 16:04:52 +0900 | [diff] [blame] | 207 | } else |
| 208 | printf("%lf\n", result_bps[pf]); |
| 209 | } |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 210 | break; |
| 211 | default: |
Hitoshi Mitake | 12eac0b | 2009-11-20 12:37:17 +0900 | [diff] [blame] | 212 | /* reaching this means there's some disaster: */ |
| 213 | die("unknown format: %d\n", bench_format); |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 214 | break; |
| 215 | } |
Borislav Petkov | 515e23f | 2015-02-26 18:51:37 +0100 | [diff] [blame^] | 216 | } |
| 217 | |
| 218 | static int bench_mem_common(int argc, const char **argv, |
| 219 | const char *prefix __maybe_unused, |
| 220 | struct bench_mem_info *info) |
| 221 | { |
| 222 | int i; |
| 223 | size_t len; |
| 224 | double totallen; |
| 225 | |
| 226 | argc = parse_options(argc, argv, options, |
| 227 | info->usage, 0); |
| 228 | |
| 229 | if (no_prefault && only_prefault) { |
| 230 | fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n"); |
| 231 | return 1; |
| 232 | } |
| 233 | |
| 234 | if (use_cycle) |
| 235 | init_cycle(); |
| 236 | |
| 237 | len = (size_t)perf_atoll((char *)length_str); |
| 238 | totallen = (double)len * iterations; |
| 239 | |
| 240 | if ((s64)len <= 0) { |
| 241 | fprintf(stderr, "Invalid length:%s\n", length_str); |
| 242 | return 1; |
| 243 | } |
| 244 | |
| 245 | /* same to without specifying either of prefault and no-prefault */ |
| 246 | if (only_prefault && no_prefault) |
| 247 | only_prefault = no_prefault = false; |
| 248 | |
| 249 | for (i = 0; info->routines[i].name; i++) { |
| 250 | if (!strcmp(info->routines[i].name, routine)) |
| 251 | break; |
| 252 | } |
| 253 | if (!info->routines[i].name) { |
| 254 | printf("Unknown routine:%s\n", routine); |
| 255 | printf("Available routines...\n"); |
| 256 | for (i = 0; info->routines[i].name; i++) { |
| 257 | printf("\t%s ... %s\n", |
| 258 | info->routines[i].name, info->routines[i].desc); |
| 259 | } |
| 260 | return 1; |
| 261 | } |
| 262 | |
| 263 | __bench_mem_routine(info, i, len, totallen); |
Hitoshi Mitake | 827f3b4 | 2009-11-18 00:20:09 +0900 | [diff] [blame] | 264 | |
| 265 | return 0; |
| 266 | } |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 267 | |
| 268 | static void memcpy_alloc_mem(void **dst, void **src, size_t length) |
| 269 | { |
| 270 | *dst = zalloc(length); |
| 271 | if (!*dst) |
| 272 | die("memory allocation failed - maybe length is too large?\n"); |
| 273 | |
| 274 | *src = zalloc(length); |
| 275 | if (!*src) |
| 276 | die("memory allocation failed - maybe length is too large?\n"); |
| 277 | /* Make sure to always replace the zero pages even if MMAP_THRESH is crossed */ |
| 278 | memset(*src, 0, length); |
| 279 | } |
| 280 | |
| 281 | static u64 do_memcpy_cycle(const struct routine *r, size_t len, bool prefault) |
| 282 | { |
| 283 | u64 cycle_start = 0ULL, cycle_end = 0ULL; |
| 284 | void *src = NULL, *dst = NULL; |
| 285 | memcpy_t fn = r->fn.memcpy; |
| 286 | int i; |
| 287 | |
| 288 | memcpy_alloc_mem(&src, &dst, len); |
| 289 | |
| 290 | if (prefault) |
| 291 | fn(dst, src, len); |
| 292 | |
| 293 | cycle_start = get_cycle(); |
| 294 | for (i = 0; i < iterations; ++i) |
| 295 | fn(dst, src, len); |
| 296 | cycle_end = get_cycle(); |
| 297 | |
| 298 | free(src); |
| 299 | free(dst); |
| 300 | return cycle_end - cycle_start; |
| 301 | } |
| 302 | |
| 303 | static double do_memcpy_gettimeofday(const struct routine *r, size_t len, |
| 304 | bool prefault) |
| 305 | { |
| 306 | struct timeval tv_start, tv_end, tv_diff; |
| 307 | memcpy_t fn = r->fn.memcpy; |
| 308 | void *src = NULL, *dst = NULL; |
| 309 | int i; |
| 310 | |
| 311 | memcpy_alloc_mem(&src, &dst, len); |
| 312 | |
| 313 | if (prefault) |
| 314 | fn(dst, src, len); |
| 315 | |
| 316 | BUG_ON(gettimeofday(&tv_start, NULL)); |
| 317 | for (i = 0; i < iterations; ++i) |
| 318 | fn(dst, src, len); |
| 319 | BUG_ON(gettimeofday(&tv_end, NULL)); |
| 320 | |
| 321 | timersub(&tv_end, &tv_start, &tv_diff); |
| 322 | |
| 323 | free(src); |
| 324 | free(dst); |
Rabin Vincent | 1182f88 | 2014-12-02 16:50:41 +0100 | [diff] [blame] | 325 | return (double)(((double)len * iterations) / timeval2double(&tv_diff)); |
Rabin Vincent | 308197b | 2014-12-02 16:50:39 +0100 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | int bench_mem_memcpy(int argc, const char **argv, |
| 329 | const char *prefix __maybe_unused) |
| 330 | { |
| 331 | struct bench_mem_info info = { |
| 332 | .routines = memcpy_routines, |
| 333 | .do_cycle = do_memcpy_cycle, |
| 334 | .do_gettimeofday = do_memcpy_gettimeofday, |
| 335 | .usage = bench_mem_memcpy_usage, |
| 336 | }; |
| 337 | |
| 338 | return bench_mem_common(argc, argv, prefix, &info); |
| 339 | } |
Rabin Vincent | 5bce1a5 | 2014-12-02 16:50:40 +0100 | [diff] [blame] | 340 | |
| 341 | static void memset_alloc_mem(void **dst, size_t length) |
| 342 | { |
| 343 | *dst = zalloc(length); |
| 344 | if (!*dst) |
| 345 | die("memory allocation failed - maybe length is too large?\n"); |
| 346 | } |
| 347 | |
| 348 | static u64 do_memset_cycle(const struct routine *r, size_t len, bool prefault) |
| 349 | { |
| 350 | u64 cycle_start = 0ULL, cycle_end = 0ULL; |
| 351 | memset_t fn = r->fn.memset; |
| 352 | void *dst = NULL; |
| 353 | int i; |
| 354 | |
| 355 | memset_alloc_mem(&dst, len); |
| 356 | |
| 357 | if (prefault) |
| 358 | fn(dst, -1, len); |
| 359 | |
| 360 | cycle_start = get_cycle(); |
| 361 | for (i = 0; i < iterations; ++i) |
| 362 | fn(dst, i, len); |
| 363 | cycle_end = get_cycle(); |
| 364 | |
| 365 | free(dst); |
| 366 | return cycle_end - cycle_start; |
| 367 | } |
| 368 | |
| 369 | static double do_memset_gettimeofday(const struct routine *r, size_t len, |
| 370 | bool prefault) |
| 371 | { |
| 372 | struct timeval tv_start, tv_end, tv_diff; |
| 373 | memset_t fn = r->fn.memset; |
| 374 | void *dst = NULL; |
| 375 | int i; |
| 376 | |
| 377 | memset_alloc_mem(&dst, len); |
| 378 | |
| 379 | if (prefault) |
| 380 | fn(dst, -1, len); |
| 381 | |
| 382 | BUG_ON(gettimeofday(&tv_start, NULL)); |
| 383 | for (i = 0; i < iterations; ++i) |
| 384 | fn(dst, i, len); |
| 385 | BUG_ON(gettimeofday(&tv_end, NULL)); |
| 386 | |
| 387 | timersub(&tv_end, &tv_start, &tv_diff); |
| 388 | |
| 389 | free(dst); |
Rabin Vincent | 1182f88 | 2014-12-02 16:50:41 +0100 | [diff] [blame] | 390 | return (double)(((double)len * iterations) / timeval2double(&tv_diff)); |
Rabin Vincent | 5bce1a5 | 2014-12-02 16:50:40 +0100 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | static const char * const bench_mem_memset_usage[] = { |
| 394 | "perf bench mem memset <options>", |
| 395 | NULL |
| 396 | }; |
| 397 | |
| 398 | static const struct routine memset_routines[] = { |
| 399 | { .name ="default", |
| 400 | .desc = "Default memset() provided by glibc", |
| 401 | .fn.memset = memset }, |
| 402 | #ifdef HAVE_ARCH_X86_64_SUPPORT |
| 403 | |
| 404 | #define MEMSET_FN(_fn, _name, _desc) { .name = _name, .desc = _desc, .fn.memset = _fn }, |
| 405 | #include "mem-memset-x86-64-asm-def.h" |
| 406 | #undef MEMSET_FN |
| 407 | |
| 408 | #endif |
| 409 | |
| 410 | { .name = NULL, |
| 411 | .desc = NULL, |
| 412 | .fn.memset = NULL } |
| 413 | }; |
| 414 | |
| 415 | int bench_mem_memset(int argc, const char **argv, |
| 416 | const char *prefix __maybe_unused) |
| 417 | { |
| 418 | struct bench_mem_info info = { |
| 419 | .routines = memset_routines, |
| 420 | .do_cycle = do_memset_cycle, |
| 421 | .do_gettimeofday = do_memset_gettimeofday, |
| 422 | .usage = bench_mem_memset_usage, |
| 423 | }; |
| 424 | |
| 425 | return bench_mem_common(argc, argv, prefix, &info); |
| 426 | } |