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)
60 char buf[BUFSIZ], ident[DISK_IDENT_SIZE];
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);
95 error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
97 err(1, "%s: ioctl(DIOCGMEDIASIZE) failed, probably not a disk.", argv[i]);
98 error = ioctl(fd, DIOCGSECTORSIZE, §orsize);
100 err(1, "%s: DIOCGSECTORSIZE failed, probably not a disk.", argv[i]);
101 error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
104 error = ioctl(fd, DIOCGFWHEADS, &fwheads);
107 error = ioctl(fd, DIOCGIDENT, ident);
111 printf("%s", argv[i]);
112 printf("\t%u", sectorsize);
113 printf("\t%jd", (intmax_t)mediasize);
114 printf("\t%jd", (intmax_t)mediasize/sectorsize);
115 if (fwsectors != 0 && fwheads != 0) {
116 printf("\t%jd", (intmax_t)mediasize /
117 (fwsectors * fwheads * sectorsize));
118 printf("\t%u", fwheads);
119 printf("\t%u", fwsectors);
122 humanize_number(buf, 5, (int64_t)mediasize, "",
123 HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
124 printf("%s\n", argv[i]);
125 printf("\t%-12u\t# sectorsize\n", sectorsize);
126 printf("\t%-12jd\t# mediasize in bytes (%s)\n",
127 (intmax_t)mediasize, buf);
128 printf("\t%-12jd\t# mediasize in sectors\n",
129 (intmax_t)mediasize/sectorsize);
130 if (fwsectors != 0 && fwheads != 0) {
131 printf("\t%-12jd\t# Cylinders according to firmware.\n", (intmax_t)mediasize /
132 (fwsectors * fwheads * sectorsize));
133 printf("\t%-12u\t# Heads according to firmware.\n", fwheads);
134 printf("\t%-12u\t# Sectors according to firmware.\n", fwsectors);
136 if (ident[0] != '\0')
137 printf("\t%-12s\t# Disk ident.\n", ident);
141 commandtime(fd, mediasize, sectorsize);
143 speeddisk(fd, mediasize, sectorsize);
150 static char sector[65536];
151 static char mega[1024 * 1024];
154 rdsect(int fd, u_int blockno, u_int sectorsize)
158 lseek(fd, (off_t)blockno * sectorsize, SEEK_SET);
159 error = read(fd, sector, sectorsize);
160 if (error != (int)sectorsize)
161 err(1, "read error or disk too small for test.");
169 error = read(fd, mega, sizeof(mega));
170 if (error != sizeof(mega))
171 err(1, "read error or disk too small for test.");
174 static struct timeval tv1, tv2;
185 gettimeofday(&tv1, NULL);
193 gettimeofday(&tv2, NULL);
194 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
195 dt += (tv2.tv_sec - tv1.tv_sec);
196 printf("%5d iter in %10.6f sec = %8.3f msec\n",
197 count, dt, dt * 1000.0 / count);
205 gettimeofday(&tv2, NULL);
206 dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
207 dt += (tv2.tv_sec - tv1.tv_sec);
208 printf("%8.0f kbytes in %10.6f sec = %8.0f kbytes/sec\n",
209 count, dt, count / dt);
213 speeddisk(int fd, off_t mediasize, u_int sectorsize)
216 uint b0, b1, sectorcount;
218 sectorcount = mediasize / sectorsize;
220 printf("Seek times:\n");
221 printf("\tFull stroke:\t");
223 b1 = sectorcount - 1 - 16384;
225 for (i = 0; i < 125; i++) {
226 rdsect(fd, b0, sectorsize);
228 rdsect(fd, b1, sectorsize);
233 printf("\tHalf stroke:\t");
234 b0 = sectorcount / 4;
235 b1 = b0 + sectorcount / 2;
237 for (i = 0; i < 125; i++) {
238 rdsect(fd, b0, sectorsize);
240 rdsect(fd, b1, sectorsize);
244 printf("\tQuarter stroke:\t");
245 b0 = sectorcount / 4;
246 b1 = b0 + sectorcount / 4;
248 for (i = 0; i < 250; i++) {
249 rdsect(fd, b0, sectorsize);
251 rdsect(fd, b1, sectorsize);
256 printf("\tShort forward:\t");
257 b0 = sectorcount / 2;
259 for (i = 0; i < 400; i++) {
260 rdsect(fd, b0, sectorsize);
265 printf("\tShort backward:\t");
266 b0 = sectorcount / 2;
268 for (i = 0; i < 400; i++) {
269 rdsect(fd, b0, sectorsize);
274 printf("\tSeq outer:\t");
277 for (i = 0; i < 2048; i++) {
278 rdsect(fd, b0, sectorsize);
283 printf("\tSeq inner:\t");
284 b0 = sectorcount - 2048 - 1;
286 for (i = 0; i < 2048; i++) {
287 rdsect(fd, b0, sectorsize);
292 printf("Transfer rates:\n");
293 printf("\toutside: ");
294 rdsect(fd, 0, sectorsize);
296 for (i = 0; i < 100; i++) {
301 printf("\tmiddle: ");
302 b0 = sectorcount / 2;
303 rdsect(fd, b0, sectorsize);
305 for (i = 0; i < 100; i++) {
310 printf("\tinside: ");
311 b0 = sectorcount - 100 * (1024*1024 / sectorsize) - 1;;
312 rdsect(fd, b0, sectorsize);
314 for (i = 0; i < 100; i++) {
324 commandtime(int fd, off_t mediasize, u_int sectorsize)
326 double dtmega, dtsector;
329 printf("I/O command overhead:\n");
331 rdsect(fd, 0, sectorsize);
333 for (i = 0; i < 10; i++)
335 gettimeofday(&tv2, NULL);
336 dtmega = (tv2.tv_usec - tv1.tv_usec) / 1e6;
337 dtmega += (tv2.tv_sec - tv1.tv_sec);
339 printf("\ttime to read 10MB block %10.6f sec\t= %8.3f msec/sector\n",
340 dtmega, dtmega*100/2048);
342 rdsect(fd, 0, sectorsize);
344 for (i = 0; i < 20480; i++)
345 rdsect(fd, 0, sectorsize);
346 gettimeofday(&tv2, NULL);
347 dtsector = (tv2.tv_usec - tv1.tv_usec) / 1e6;
348 dtsector += (tv2.tv_sec - tv1.tv_sec);
350 printf("\ttime to read 20480 sectors %10.6f sec\t= %8.3f msec/sector\n",
351 dtsector, dtsector*100/2048);
352 printf("\tcalculated command overhead\t\t\t= %8.3f msec/sector\n",
353 (dtsector - dtmega)*100/2048);