nbperf.c revision 1.9
1 /* $NetBSD: nbperf.c,v 1.9 2024/09/22 20:34:26 christos Exp $ */ 2 /*- 3 * Copyright (c) 2009 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Joerg Sonnenberger. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if HAVE_NBTOOL_CONFIG_H 35 #include "nbtool_config.h" 36 #endif 37 38 #include <sys/cdefs.h> 39 __RCSID("$NetBSD: nbperf.c,v 1.9 2024/09/22 20:34:26 christos Exp $"); 40 41 #include <sys/endian.h> 42 #include <err.h> 43 #include <errno.h> 44 #include <inttypes.h> 45 #include <stdlib.h> 46 #include <stdio.h> 47 #include <string.h> 48 #include <time.h> 49 #include <unistd.h> 50 51 #include "nbperf.h" 52 53 static int predictable; 54 55 static __dead 56 void usage(void) 57 { 58 fprintf(stderr, 59 "%s [-ps] [-c utilisation] [-i iterations] [-n name] " 60 "[-o output] input\n", 61 getprogname()); 62 exit(1); 63 } 64 65 #if HAVE_NBTOOL_CONFIG_H 66 #define arc4random() rand() 67 #endif 68 69 static void 70 mi_vector_hash_seed_hash(struct nbperf *nbperf) 71 { 72 static uint32_t predictable_counter; 73 if (predictable) 74 nbperf->seed[0] = predictable_counter++; 75 else 76 nbperf->seed[0] = arc4random(); 77 } 78 79 static void 80 mi_vector_hash_compute(struct nbperf *nbperf, const void *key, size_t keylen, 81 uint32_t *hashes) 82 { 83 mi_vector_hash(key, keylen, nbperf->seed[0], hashes); 84 } 85 86 static void 87 mi_vector_hash_print_hash(struct nbperf *nbperf, const char *indent, 88 const char *key, const char *keylen, const char *hash) 89 { 90 fprintf(nbperf->output, 91 "%smi_vector_hash(%s, %s, 0x%08" PRIx32 "U, %s);\n", 92 indent, key, keylen, nbperf->seed[0], hash); 93 } 94 95 static void 96 set_hash(struct nbperf *nbperf, const char *arg) 97 { 98 if (strcmp(arg, "mi_vector_hash") == 0) { 99 nbperf->hash_size = 3; 100 nbperf->seed_hash = mi_vector_hash_seed_hash; 101 nbperf->compute_hash = mi_vector_hash_compute; 102 nbperf->print_hash = mi_vector_hash_print_hash; 103 return; 104 } 105 if (nbperf->hash_size > NBPERF_MAX_HASH_SIZE) 106 errx(1, "Hash function creates too many output values"); 107 errx(1, "Unknown hash function: %s", arg); 108 } 109 110 int 111 main(int argc, char **argv) 112 { 113 struct nbperf nbperf = { 114 .c = 0, 115 .hash_name = "hash", 116 .map_output = NULL, 117 .output = NULL, 118 .static_hash = 0, 119 .check_duplicates = 0, 120 .has_duplicates = 0, 121 .allow_hash_fudging = 0, 122 }; 123 FILE *input; 124 size_t curlen = 0, curalloc = 0; 125 char *line, *eos; 126 ssize_t line_len; 127 size_t line_allocated; 128 const void **keys = NULL; 129 size_t *keylens = NULL; 130 uint32_t max_iterations = ~0U; 131 long long tmp; 132 int looped, ch; 133 int (*build_hash)(struct nbperf *) = chm_compute; 134 135 set_hash(&nbperf, "mi_vector_hash"); 136 137 while ((ch = getopt(argc, argv, "a:c:fh:i:m:n:o:ps")) != -1) { 138 switch (ch) { 139 case 'a': 140 /* Accept bdz as alias for netbsd-6 compat. */ 141 if (strcmp(optarg, "chm") == 0) 142 build_hash = chm_compute; 143 else if (strcmp(optarg, "chm3") == 0) 144 build_hash = chm3_compute; 145 else if (strcmp(optarg, "bpz") == 0 || 146 strcmp(optarg, "bdz") == 0) 147 build_hash = bpz_compute; 148 else 149 errx(1, "Unsupported algorithm: %s", optarg); 150 break; 151 case 'c': 152 errno = 0; 153 nbperf.c = strtod(optarg, &eos); 154 if (errno || eos[0] || !nbperf.c) 155 errx(2, "Invalid argument for -c"); 156 break; 157 case 'f': 158 nbperf.allow_hash_fudging = 1; 159 break; 160 case 'h': 161 set_hash(&nbperf, optarg); 162 break; 163 case 'i': 164 errno = 0; 165 tmp = strtoll(optarg, &eos, 0); 166 if (errno || eos == optarg || eos[0] || 167 tmp < 0 || tmp > 0xffffffffU) 168 errx(2, "Iteration count must be " 169 "a 32bit integer"); 170 max_iterations = (uint32_t)tmp; 171 break; 172 case 'm': 173 if (nbperf.map_output) 174 fclose(nbperf.map_output); 175 nbperf.map_output = fopen(optarg, "w"); 176 if (nbperf.map_output == NULL) 177 err(2, "cannot open map file"); 178 break; 179 case 'n': 180 nbperf.hash_name = optarg; 181 break; 182 case 'o': 183 if (nbperf.output) 184 fclose(nbperf.output); 185 nbperf.output = fopen(optarg, "w"); 186 if (nbperf.output == NULL) 187 err(2, "cannot open output file"); 188 break; 189 case 'p': 190 predictable = 1; 191 break; 192 case 's': 193 nbperf.static_hash = 1; 194 break; 195 default: 196 usage(); 197 } 198 } 199 200 argc -= optind; 201 argv += optind; 202 203 if (argc > 1) 204 usage(); 205 206 if (argc == 1) { 207 input = fopen(argv[0], "r"); 208 if (input == NULL) 209 err(1, "can't open input file"); 210 } else 211 input = stdin; 212 213 if (nbperf.output == NULL) 214 nbperf.output = stdout; 215 216 line = NULL; 217 line_allocated = 0; 218 while ((line_len = getline(&line, &line_allocated, input)) != -1) { 219 if (line_len && line[line_len - 1] == '\n') 220 --line_len; 221 if (curlen == curalloc) { 222 if (curalloc < 256) 223 curalloc = 256; 224 else 225 curalloc += curalloc; 226 keys = realloc(keys, curalloc * sizeof(*keys)); 227 if (keys == NULL) 228 err(1, "realloc failed"); 229 keylens = realloc(keylens, 230 curalloc * sizeof(*keylens)); 231 if (keylens == NULL) 232 err(1, "realloc failed"); 233 } 234 if ((keys[curlen] = strndup(line, line_len)) == NULL) 235 err(1, "malloc failed"); 236 keylens[curlen] = line_len; 237 ++curlen; 238 } 239 free(line); 240 241 if (input != stdin) 242 fclose(input); 243 244 nbperf.n = curlen; 245 nbperf.keys = keys; 246 nbperf.keylens = keylens; 247 248 looped = 0; 249 int rv; 250 for (;;) { 251 rv = (*build_hash)(&nbperf); 252 if (!rv) 253 break; 254 if (nbperf.has_duplicates) { 255 fputc('\n', stderr); 256 errx(1, "Duplicate keys detected"); 257 } 258 fputc('.', stderr); 259 if (!looped) 260 nbperf.check_duplicates = 1; 261 looped = 1; 262 if (max_iterations == ~0U) 263 continue; 264 if (--max_iterations == 0) { 265 fputc('\n', stderr); 266 errx(1, "Iteration count reached"); 267 } 268 } 269 if (looped) 270 fputc('\n', stderr); 271 272 return 0; 273 } 274
Indexes created Tue Oct 21 16:10:11 GMT 2025