2 * Copyright (c) 2003 Poul-Henning Kamp
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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
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
47 fprintf(stderr, "usage: diskinfo [-ctv] disk ...\n");
51 static int opt_c, opt_t, opt_v;
53 static void speeddisk(int fd, off_t mediasize, u_int sectorsize);
54 static void commandtime(int fd, off_t mediasize, u_int sectorsize);
57 main(int argc, char **argv)
59 int i, ch, fd, error, exitval = 0;
60 char buf[BUFSIZ], ident[DISK_IDENT_SIZE];
61 off_t mediasize, stripesize, stripeoffset;
62 u_int sectorsize, fwsectors, fwheads;
64 while ((ch = getopt(argc, argv, "ctv")) != -1) {
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);
98 error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
100 warn("%s: ioctl(DIOCGMEDIASIZE) failed, probably not a disk.", argv[i]);
104 error = ioctl(fd, DIOCGSECTORSIZE, §orsize);
106 warn("%s: DIOCGSECTORSIZE failed, probably not a disk.", argv[i]);
110 error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
113 error = ioctl(fd, DIOCGFWHEADS, &fwheads);
116 error = ioctl(fd, DIOCGSTRIPESIZE, &stripesize);
119 error = ioctl(fd, DIOCGSTRIPEOFFSET, &stripeoffset);
123 printf("%s", argv[i]);
124 printf("\t%u", sectorsize);
125 printf("\t%jd", (intmax_t)mediasize);
126 printf("\t%jd", (intmax_t)mediasize/sectorsize);
127 printf("\t%jd", (intmax_t)stripesize);
128 printf("\t%jd", (intmax_t)stripeoffset);
129 if (fwsectors != 0 && fwheads != 0) {
130 printf("\t%jd", (intmax_t)mediasize /
131 (fwsectors * fwheads * sectorsize));
132 printf("\t%u", fwheads);
133 printf("\t%u", fwsectors);
136 humanize_number(buf, 5, (int64_t)mediasize, "",
137 HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
138 printf("%s\n", argv[i]);
139 printf("\t%-12u\t# sectorsize\n", sectorsize);
140 printf("\t%-12jd\t# mediasize in bytes (%s)\n",
141 (intmax_t)mediasize, buf);
142 printf("\t%-12jd\t# mediasize in sectors\n",
143 (intmax_t)mediasize/sectorsize);
144 printf("\t%-12jd\t# stripesize\n", stripesize);
145 printf("\t%-12jd\t# stripeoffset\n", stripeoffset);
146 if (fwsectors != 0 && fwheads != 0) {
147 printf("\t%-12jd\t# Cylinders according to firmware.\n", (intmax_t)mediasize /
148 (fwsectors * fwheads * sectorsize));
149 printf("\t%-12u\t# Heads according to firmware.\n", fwheads);
150 printf("\t%-12u\t# Sectors according to firmware.\n", fwsectors);
152 if (ioctl(fd, DIOCGIDENT, ident) == 0)
153 printf("\t%-12s\t# Disk ident.\n", ident);
157 commandtime(fd, mediasize, sectorsize);
159 speeddisk(fd, mediasize, sectorsize);
167 static char sector[65536];
168 static char mega[1024 * 1024];
171 rdsect(int fd, u_int blockno, u_int sectorsize)
175 lseek(fd, (off_t)blockno * sectorsize, SEEK_SET);
176 error = read(fd, sector, sectorsize);
177 if (error != (int)sectorsize)
178 err(1, "read error or disk too small for test.");
186 error = read(fd, mega, sizeof(mega));
187 if (error != sizeof(mega))
188 err(1, "read error or disk too small for test.");
191 static struct timeval tv1, tv2;
202 gettimeofday(&tv1, NULL);
210 gettimeofday(&tv2, NULL);
211 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
212 dt += (tv2.tv_sec - tv1.tv_sec);
213 printf("%5d iter in %10.6f sec = %8.3f msec\n",
214 count, dt, dt * 1000.0 / count);
222 gettimeofday(&tv2, NULL);
223 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
224 dt += (tv2.tv_sec - tv1.tv_sec);
225 printf("%8.0f kbytes in %10.6f sec = %8.0f kbytes/sec\n",
226 count, dt, count / dt);
230 speeddisk(int fd, off_t mediasize, u_int sectorsize)
233 uint b0, b1, sectorcount;
235 sectorcount = mediasize / sectorsize;
237 printf("Seek times:\n");
238 printf("\tFull stroke:\t");
240 b1 = sectorcount - 1 - 16384;
242 for (i = 0; i < 125; i++) {
243 rdsect(fd, b0, sectorsize);
245 rdsect(fd, b1, sectorsize);
250 printf("\tHalf stroke:\t");
251 b0 = sectorcount / 4;
252 b1 = b0 + sectorcount / 2;
254 for (i = 0; i < 125; i++) {
255 rdsect(fd, b0, sectorsize);
257 rdsect(fd, b1, sectorsize);
261 printf("\tQuarter stroke:\t");
262 b0 = sectorcount / 4;
263 b1 = b0 + sectorcount / 4;
265 for (i = 0; i < 250; i++) {
266 rdsect(fd, b0, sectorsize);
268 rdsect(fd, b1, sectorsize);
273 printf("\tShort forward:\t");
274 b0 = sectorcount / 2;
276 for (i = 0; i < 400; i++) {
277 rdsect(fd, b0, sectorsize);
282 printf("\tShort backward:\t");
283 b0 = sectorcount / 2;
285 for (i = 0; i < 400; i++) {
286 rdsect(fd, b0, sectorsize);
291 printf("\tSeq outer:\t");
294 for (i = 0; i < 2048; i++) {
295 rdsect(fd, b0, sectorsize);
300 printf("\tSeq inner:\t");
301 b0 = sectorcount - 2048 - 1;
303 for (i = 0; i < 2048; i++) {
304 rdsect(fd, b0, sectorsize);
309 printf("Transfer rates:\n");
310 printf("\toutside: ");
311 rdsect(fd, 0, sectorsize);
313 for (i = 0; i < 100; i++) {
318 printf("\tmiddle: ");
319 b0 = sectorcount / 2;
320 rdsect(fd, b0, sectorsize);
322 for (i = 0; i < 100; i++) {
327 printf("\tinside: ");
328 b0 = sectorcount - 100 * (1024*1024 / sectorsize) - 1;;
329 rdsect(fd, b0, sectorsize);
331 for (i = 0; i < 100; i++) {
341 commandtime(int fd, off_t mediasize, u_int sectorsize)
343 double dtmega, dtsector;
346 printf("I/O command overhead:\n");
348 rdsect(fd, 0, sectorsize);
350 for (i = 0; i < 10; i++)
352 gettimeofday(&tv2, NULL);
353 dtmega = (tv2.tv_usec - tv1.tv_usec) / 1e6;
354 dtmega += (tv2.tv_sec - tv1.tv_sec);
356 printf("\ttime to read 10MB block %10.6f sec\t= %8.3f msec/sector\n",
357 dtmega, dtmega*100/2048);
359 rdsect(fd, 0, sectorsize);
361 for (i = 0; i < 20480; i++)
362 rdsect(fd, 0, sectorsize);
363 gettimeofday(&tv2, NULL);
364 dtsector = (tv2.tv_usec - tv1.tv_usec) / 1e6;
365 dtsector += (tv2.tv_sec - tv1.tv_sec);
367 printf("\ttime to read 20480 sectors %10.6f sec\t= %8.3f msec/sector\n",
368 dtsector, dtsector*100/2048);
369 printf("\tcalculated command overhead\t\t\t= %8.3f msec/sector\n",
370 (dtsector - dtmega)*100/2048);