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
48 fprintf(stderr, "usage: diskinfo [-ctv] disk ...\n");
52 static int opt_c, opt_t, opt_v;
54 static void speeddisk(int fd, off_t mediasize, u_int sectorsize);
55 static void commandtime(int fd, off_t mediasize, u_int sectorsize);
58 main(int argc, char **argv)
60 int i, ch, fd, error, exitval = 0;
61 char buf[BUFSIZ], ident[DISK_IDENT_SIZE];
62 off_t mediasize, stripesize, stripeoffset;
63 u_int sectorsize, fwsectors, fwheads;
65 while ((ch = getopt(argc, argv, "ctv")) != -1) {
88 for (i = 0; i < argc; i++) {
89 fd = open(argv[i], O_RDONLY);
90 if (fd < 0 && errno == ENOENT && *argv[i] != '/') {
91 sprintf(buf, "%s%s", _PATH_DEV, argv[i]);
92 fd = open(buf, O_RDONLY);
99 error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
101 warn("%s: ioctl(DIOCGMEDIASIZE) failed, probably not a disk.", argv[i]);
105 error = ioctl(fd, DIOCGSECTORSIZE, §orsize);
107 warn("%s: DIOCGSECTORSIZE failed, probably not a disk.", argv[i]);
111 error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
114 error = ioctl(fd, DIOCGFWHEADS, &fwheads);
117 error = ioctl(fd, DIOCGSTRIPESIZE, &stripesize);
120 error = ioctl(fd, DIOCGSTRIPEOFFSET, &stripeoffset);
124 printf("%s", argv[i]);
125 printf("\t%u", sectorsize);
126 printf("\t%jd", (intmax_t)mediasize);
127 printf("\t%jd", (intmax_t)mediasize/sectorsize);
128 printf("\t%jd", (intmax_t)stripesize);
129 printf("\t%jd", (intmax_t)stripeoffset);
130 if (fwsectors != 0 && fwheads != 0) {
131 printf("\t%jd", (intmax_t)mediasize /
132 (fwsectors * fwheads * sectorsize));
133 printf("\t%u", fwheads);
134 printf("\t%u", fwsectors);
137 humanize_number(buf, 5, (int64_t)mediasize, "",
138 HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
139 printf("%s\n", argv[i]);
140 printf("\t%-12u\t# sectorsize\n", sectorsize);
141 printf("\t%-12jd\t# mediasize in bytes (%s)\n",
142 (intmax_t)mediasize, buf);
143 printf("\t%-12jd\t# mediasize in sectors\n",
144 (intmax_t)mediasize/sectorsize);
145 printf("\t%-12jd\t# stripesize\n", stripesize);
146 printf("\t%-12jd\t# stripeoffset\n", stripeoffset);
147 if (fwsectors != 0 && fwheads != 0) {
148 printf("\t%-12jd\t# Cylinders according to firmware.\n", (intmax_t)mediasize /
149 (fwsectors * fwheads * sectorsize));
150 printf("\t%-12u\t# Heads according to firmware.\n", fwheads);
151 printf("\t%-12u\t# Sectors according to firmware.\n", fwsectors);
153 if (ioctl(fd, DIOCGIDENT, ident) == 0)
154 printf("\t%-12s\t# Disk ident.\n", ident);
158 commandtime(fd, mediasize, sectorsize);
160 speeddisk(fd, mediasize, sectorsize);
168 static char sector[65536];
169 static char mega[1024 * 1024];
172 rdsect(int fd, off_t blockno, u_int sectorsize)
176 lseek(fd, (off_t)blockno * sectorsize, SEEK_SET);
177 error = read(fd, sector, sectorsize);
178 if (error != (int)sectorsize)
179 err(1, "read error or disk too small for test.");
187 error = read(fd, mega, sizeof(mega));
188 if (error != sizeof(mega))
189 err(1, "read error or disk too small for test.");
192 static struct timeval tv1, tv2;
203 gettimeofday(&tv1, NULL);
211 gettimeofday(&tv2, NULL);
212 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
213 dt += (tv2.tv_sec - tv1.tv_sec);
214 printf("%5d iter in %10.6f sec = %8.3f msec\n",
215 count, dt, dt * 1000.0 / count);
223 gettimeofday(&tv2, NULL);
224 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
225 dt += (tv2.tv_sec - tv1.tv_sec);
226 printf("%8.0f kbytes in %10.6f sec = %8.0f kbytes/sec\n",
227 count, dt, count / dt);
231 speeddisk(int fd, off_t mediasize, u_int sectorsize)
234 off_t b0, b1, sectorcount, step;
236 sectorcount = mediasize / sectorsize;
237 step = 1ULL << (flsll(sectorcount / (4 * 200)) - 1);
240 bulk = mediasize / (1024 * 1024);
244 printf("Seek times:\n");
245 printf("\tFull stroke:\t");
247 b1 = sectorcount - step;
249 for (i = 0; i < 125; i++) {
250 rdsect(fd, b0, sectorsize);
252 rdsect(fd, b1, sectorsize);
257 printf("\tHalf stroke:\t");
258 b0 = sectorcount / 4;
259 b1 = b0 + sectorcount / 2;
261 for (i = 0; i < 125; i++) {
262 rdsect(fd, b0, sectorsize);
264 rdsect(fd, b1, sectorsize);
268 printf("\tQuarter stroke:\t");
269 b0 = sectorcount / 4;
270 b1 = b0 + sectorcount / 4;
272 for (i = 0; i < 250; i++) {
273 rdsect(fd, b0, sectorsize);
275 rdsect(fd, b1, sectorsize);
280 printf("\tShort forward:\t");
281 b0 = sectorcount / 2;
283 for (i = 0; i < 400; i++) {
284 rdsect(fd, b0, sectorsize);
289 printf("\tShort backward:\t");
290 b0 = sectorcount / 2;
292 for (i = 0; i < 400; i++) {
293 rdsect(fd, b0, sectorsize);
298 printf("\tSeq outer:\t");
301 for (i = 0; i < 2048; i++) {
302 rdsect(fd, b0, sectorsize);
307 printf("\tSeq inner:\t");
308 b0 = sectorcount - 2048;
310 for (i = 0; i < 2048; i++) {
311 rdsect(fd, b0, sectorsize);
316 printf("Transfer rates:\n");
317 printf("\toutside: ");
318 rdsect(fd, 0, sectorsize);
320 for (i = 0; i < bulk; i++) {
325 printf("\tmiddle: ");
326 b0 = sectorcount / 2 - bulk * (1024*1024 / sectorsize) / 2 - 1;
327 rdsect(fd, b0, sectorsize);
329 for (i = 0; i < bulk; i++) {
334 printf("\tinside: ");
335 b0 = sectorcount - bulk * (1024*1024 / sectorsize) - 1;
336 rdsect(fd, b0, sectorsize);
338 for (i = 0; i < bulk; i++) {
348 commandtime(int fd, off_t mediasize, u_int sectorsize)
350 double dtmega, dtsector;
353 printf("I/O command overhead:\n");
355 rdsect(fd, 0, sectorsize);
357 for (i = 0; i < 10; i++)
359 gettimeofday(&tv2, NULL);
360 dtmega = (tv2.tv_usec - tv1.tv_usec) / 1e6;
361 dtmega += (tv2.tv_sec - tv1.tv_sec);
363 printf("\ttime to read 10MB block %10.6f sec\t= %8.3f msec/sector\n",
364 dtmega, dtmega*100/2048);
366 rdsect(fd, 0, sectorsize);
368 for (i = 0; i < 20480; i++)
369 rdsect(fd, 0, sectorsize);
370 gettimeofday(&tv2, NULL);
371 dtsector = (tv2.tv_usec - tv1.tv_usec) / 1e6;
372 dtsector += (tv2.tv_sec - tv1.tv_sec);
374 printf("\ttime to read 20480 sectors %10.6f sec\t= %8.3f msec/sector\n",
375 dtsector, dtsector*100/2048);
376 printf("\tcalculated command overhead\t\t\t= %8.3f msec/sector\n",
377 (dtsector - dtmega)*100/2048);