1 /*- 2 * Copyright (c) 2003 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The names of the authors may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include <stdio.h> 33 #include <stdint.h> 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <libutil.h> 39 #include <paths.h> 40 #include <err.h> 41 #include <sys/disk.h> 42 #include <sys/time.h> 43 44 static void 45 usage(void) 46 { 47 fprintf(stderr, "usage: diskinfo [-ctv] disk ...\n"); 48 exit (1); 49 } 50 51 static int opt_c, opt_t, opt_v; 52 53 static void speeddisk(int fd, off_t mediasize, u_int sectorsize); 54 static void commandtime(int fd, off_t mediasize, u_int sectorsize); 55 56 int 57 main(int argc, char **argv) 58 { 59 int i, ch, fd, error; 60 char buf[BUFSIZ], ident[DISK_IDENT_SIZE]; 61 off_t mediasize, stripesize, stripeoffset; 62 u_int sectorsize, fwsectors, fwheads; 63 64 while ((ch = getopt(argc, argv, "ctv")) != -1) { 65 switch (ch) { 66 case 'c': 67 opt_c = 1; 68 opt_v = 1; 69 break; 70 case 't': 71 opt_t = 1; 72 opt_v = 1; 73 break; 74 case 'v': 75 opt_v = 1; 76 break; 77 default: 78 usage(); 79 } 80 } 81 argc -= optind; 82 argv += optind; 83 84 if (argc < 1) 85 usage(); 86 87 for (i = 0; i < argc; i++) { 88 fd = open(argv[i], O_RDONLY); 89 if (fd < 0 && errno == ENOENT && *argv[i] != '/') { 90 sprintf(buf, "%s%s", _PATH_DEV, argv[i]); 91 fd = open(buf, O_RDONLY); 92 } 93 if (fd < 0) 94 err(1, argv[i]); 95 error = ioctl(fd, DIOCGMEDIASIZE, &mediasize); 96 if (error) 97 err(1, "%s: ioctl(DIOCGMEDIASIZE) failed, probably not a disk.", argv[i]); 98 error = ioctl(fd, DIOCGSECTORSIZE, §orsize); 99 if (error) 100 err(1, "%s: DIOCGSECTORSIZE failed, probably not a disk.", argv[i]); 101 error = ioctl(fd, DIOCGFWSECTORS, &fwsectors); 102 if (error) 103 fwsectors = 0; 104 error = ioctl(fd, DIOCGFWHEADS, &fwheads); 105 if (error) 106 fwheads = 0; 107 error = ioctl(fd, DIOCGSTRIPESIZE, &stripesize); 108 if (error) 109 stripesize = 0; 110 error = ioctl(fd, DIOCGSTRIPEOFFSET, &stripeoffset); 111 if (error) 112 stripeoffset = 0; 113 if (!opt_v) { 114 printf("%s", argv[i]); 115 printf("\t%u", sectorsize); 116 printf("\t%jd", (intmax_t)mediasize); 117 printf("\t%jd", (intmax_t)mediasize/sectorsize); 118 printf("\t%jd", (intmax_t)stripesize); 119 printf("\t%jd", (intmax_t)stripeoffset); 120 if (fwsectors != 0 && fwheads != 0) { 121 printf("\t%jd", (intmax_t)mediasize / 122 (fwsectors * fwheads * sectorsize)); 123 printf("\t%u", fwheads); 124 printf("\t%u", fwsectors); 125 } 126 } else { 127 humanize_number(buf, 5, (int64_t)mediasize, "", 128 HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL); 129 printf("%s\n", argv[i]); 130 printf("\t%-12u\t# sectorsize\n", sectorsize); 131 printf("\t%-12jd\t# mediasize in bytes (%s)\n", 132 (intmax_t)mediasize, buf); 133 printf("\t%-12jd\t# mediasize in sectors\n", 134 (intmax_t)mediasize/sectorsize); 135 printf("\t%-12jd\t# stripesize\n", stripesize); 136 printf("\t%-12jd\t# stripeoffset\n", stripeoffset); 137 if (fwsectors != 0 && fwheads != 0) { 138 printf("\t%-12jd\t# Cylinders according to firmware.\n", (intmax_t)mediasize / 139 (fwsectors * fwheads * sectorsize)); 140 printf("\t%-12u\t# Heads according to firmware.\n", fwheads); 141 printf("\t%-12u\t# Sectors according to firmware.\n", fwsectors); 142 } 143 if (ioctl(fd, DIOCGIDENT, ident) == 0) 144 printf("\t%-12s\t# Disk ident.\n", ident); 145 } 146 printf("\n"); 147 if (opt_c) 148 commandtime(fd, mediasize, sectorsize); 149 if (opt_t) 150 speeddisk(fd, mediasize, sectorsize); 151 close(fd); 152 } 153 exit (0); 154 } 155 156 157 static char sector[65536]; 158 static char mega[1024 * 1024]; 159 160 static void 161 rdsect(int fd, u_int blockno, u_int sectorsize) 162 { 163 int error; 164 165 lseek(fd, (off_t)blockno * sectorsize, SEEK_SET); 166 error = read(fd, sector, sectorsize); 167 if (error != (int)sectorsize) 168 err(1, "read error or disk too small for test."); 169 } 170 171 static void 172 rdmega(int fd) 173 { 174 int error; 175 176 error = read(fd, mega, sizeof(mega)); 177 if (error != sizeof(mega)) 178 err(1, "read error or disk too small for test."); 179 } 180 181 static struct timeval tv1, tv2; 182 183 static void 184 T0(void) 185 { 186 187 fflush(stdout); 188 sync(); 189 sleep(1); 190 sync(); 191 sync(); 192 gettimeofday(&tv1, NULL); 193 } 194 195 static void 196 TN(int count) 197 { 198 double dt; 199 200 gettimeofday(&tv2, NULL); 201 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6; 202 dt += (tv2.tv_sec - tv1.tv_sec); 203 printf("%5d iter in %10.6f sec = %8.3f msec\n", 204 count, dt, dt * 1000.0 / count); 205 } 206 207 static void 208 TR(double count) 209 { 210 double dt; 211 212 gettimeofday(&tv2, NULL); 213 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6; 214 dt += (tv2.tv_sec - tv1.tv_sec); 215 printf("%8.0f kbytes in %10.6f sec = %8.0f kbytes/sec\n", 216 count, dt, count / dt); 217 } 218 219 static void 220 speeddisk(int fd, off_t mediasize, u_int sectorsize) 221 { 222 int i; 223 uint b0, b1, sectorcount; 224 225 sectorcount = mediasize / sectorsize; 226 227 printf("Seek times:\n"); 228 printf("\tFull stroke:\t"); 229 b0 = 0; 230 b1 = sectorcount - 1 - 16384; 231 T0(); 232 for (i = 0; i < 125; i++) { 233 rdsect(fd, b0, sectorsize); 234 b0 += 16384; 235 rdsect(fd, b1, sectorsize); 236 b1 -= 16384; 237 } 238 TN(250); 239 240 printf("\tHalf stroke:\t"); 241 b0 = sectorcount / 4; 242 b1 = b0 + sectorcount / 2; 243 T0(); 244 for (i = 0; i < 125; i++) { 245 rdsect(fd, b0, sectorsize); 246 b0 += 16384; 247 rdsect(fd, b1, sectorsize); 248 b1 += 16384; 249 } 250 TN(250); 251 printf("\tQuarter stroke:\t"); 252 b0 = sectorcount / 4; 253 b1 = b0 + sectorcount / 4; 254 T0(); 255 for (i = 0; i < 250; i++) { 256 rdsect(fd, b0, sectorsize); 257 b0 += 16384; 258 rdsect(fd, b1, sectorsize); 259 b1 += 16384; 260 } 261 TN(500); 262 263 printf("\tShort forward:\t"); 264 b0 = sectorcount / 2; 265 T0(); 266 for (i = 0; i < 400; i++) { 267 rdsect(fd, b0, sectorsize); 268 b0 += 16384; 269 } 270 TN(400); 271 272 printf("\tShort backward:\t"); 273 b0 = sectorcount / 2; 274 T0(); 275 for (i = 0; i < 400; i++) { 276 rdsect(fd, b0, sectorsize); 277 b0 -= 16384; 278 } 279 TN(400); 280 281 printf("\tSeq outer:\t"); 282 b0 = 0; 283 T0(); 284 for (i = 0; i < 2048; i++) { 285 rdsect(fd, b0, sectorsize); 286 b0++; 287 } 288 TN(2048); 289 290 printf("\tSeq inner:\t"); 291 b0 = sectorcount - 2048 - 1; 292 T0(); 293 for (i = 0; i < 2048; i++) { 294 rdsect(fd, b0, sectorsize); 295 b0++; 296 } 297 TN(2048); 298 299 printf("Transfer rates:\n"); 300 printf("\toutside: "); 301 rdsect(fd, 0, sectorsize); 302 T0(); 303 for (i = 0; i < 100; i++) { 304 rdmega(fd); 305 } 306 TR(100 * 1024); 307 308 printf("\tmiddle: "); 309 b0 = sectorcount / 2; 310 rdsect(fd, b0, sectorsize); 311 T0(); 312 for (i = 0; i < 100; i++) { 313 rdmega(fd); 314 } 315 TR(100 * 1024); 316 317 printf("\tinside: "); 318 b0 = sectorcount - 100 * (1024*1024 / sectorsize) - 1;; 319 rdsect(fd, b0, sectorsize); 320 T0(); 321 for (i = 0; i < 100; i++) { 322 rdmega(fd); 323 } 324 TR(100 * 1024); 325 326 printf("\n"); 327 return; 328 } 329 330 static void 331 commandtime(int fd, off_t mediasize, u_int sectorsize) 332 { 333 double dtmega, dtsector; 334 int i; 335 336 printf("I/O command overhead:\n"); 337 i = mediasize; 338 rdsect(fd, 0, sectorsize); 339 T0(); 340 for (i = 0; i < 10; i++) 341 rdmega(fd); 342 gettimeofday(&tv2, NULL); 343 dtmega = (tv2.tv_usec - tv1.tv_usec) / 1e6; 344 dtmega += (tv2.tv_sec - tv1.tv_sec); 345 346 printf("\ttime to read 10MB block %10.6f sec\t= %8.3f msec/sector\n", 347 dtmega, dtmega*100/2048); 348 349 rdsect(fd, 0, sectorsize); 350 T0(); 351 for (i = 0; i < 20480; i++) 352 rdsect(fd, 0, sectorsize); 353 gettimeofday(&tv2, NULL); 354 dtsector = (tv2.tv_usec - tv1.tv_usec) / 1e6; 355 dtsector += (tv2.tv_sec - tv1.tv_sec); 356 357 printf("\ttime to read 20480 sectors %10.6f sec\t= %8.3f msec/sector\n", 358 dtsector, dtsector*100/2048); 359 printf("\tcalculated command overhead\t\t\t= %8.3f msec/sector\n", 360 (dtsector - dtmega)*100/2048); 361 362 printf("\n"); 363 return; 364 } 365