FreeBSD-5.3/usr.sbin/diskinfo/diskinfo.c
/*-
* Copyright (c) 2003 Poul-Henning Kamp
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/usr.sbin/diskinfo/diskinfo.c,v 1.6 2004/05/25 12:11:13 pjd Exp $
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <libutil.h>
#include <paths.h>
#include <err.h>
#include <sys/disk.h>
#include <sys/time.h>
static void
usage(void)
{
fprintf(stderr, "usage: diskinfo [-tv] disk ...\n");
exit (1);
}
static int opt_t, opt_v;
static void speeddisk(int fd, off_t mediasize, u_int sectorsize);
int
main(int argc, char **argv)
{
int i, ch, fd, error;
char buf[BUFSIZ];
off_t mediasize;
u_int sectorsize, fwsectors, fwheads;
while ((ch = getopt(argc, argv, "tv")) != -1) {
switch (ch) {
case 't':
opt_t = 1;
opt_v = 1;
break;
case 'v':
opt_v = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
for (i = 0; i < argc; i++) {
fd = open(argv[i], O_RDONLY);
if (fd < 0 && errno == ENOENT && *argv[i] != '/') {
sprintf(buf, "%s%s", _PATH_DEV, argv[i]);
fd = open(buf, O_RDONLY);
}
if (fd < 0)
err(1, argv[i]);
error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
if (error)
err(1, "%s: ioctl(DIOCGMEDIASIZE) failed, probably not a disk.", argv[i]);
error = ioctl(fd, DIOCGSECTORSIZE, §orsize);
if (error)
err(1, "%s: DIOCGSECTORSIZE failed, probably not a disk.", argv[i]);
error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
if (error)
fwsectors = 0;
error = ioctl(fd, DIOCGFWHEADS, &fwheads);
if (error)
fwheads = 0;
if (!opt_v) {
printf("%s", argv[i]);
printf("\t%u", sectorsize);
printf("\t%jd", (intmax_t)mediasize);
printf("\t%jd", (intmax_t)mediasize/sectorsize);
if (fwsectors != 0 && fwheads != 0) {
printf("\t%jd", (intmax_t)mediasize /
(fwsectors * fwheads * sectorsize));
printf("\t%u", fwheads);
printf("\t%u", fwsectors);
}
} else {
humanize_number(buf, 5, (int64_t)mediasize, "",
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
printf("%s\n", argv[i]);
printf("\t%-12u\t# sectorsize\n", sectorsize);
printf("\t%-12jd\t# mediasize in bytes (%s)\n",
(intmax_t)mediasize, buf);
printf("\t%-12jd\t# mediasize in sectors\n",
(intmax_t)mediasize/sectorsize);
if (fwsectors != 0 && fwheads != 0) {
printf("\t%-12jd\t# Cylinders according to firmware.\n", (intmax_t)mediasize /
(fwsectors * fwheads * sectorsize));
printf("\t%-12u\t# Heads according to firmware.\n", fwheads);
printf("\t%-12u\t# Sectors according to firmware.\n", fwsectors);
}
}
printf("\n");
if (opt_t)
speeddisk(fd, mediasize, sectorsize);
close(fd);
}
exit (0);
}
static char sector[65536];
static char mega[1024 * 1024];
static void
rdsect(int fd, u_int blockno, u_int sectorsize)
{
int error;
lseek(fd, (off_t)blockno * sectorsize, SEEK_SET);
error = read(fd, sector, sectorsize);
if (error != (int)sectorsize)
err(1, "read error or disk too small for test.");
}
static void
rdmega(int fd)
{
int error;
error = read(fd, mega, sizeof(mega));
if (error != sizeof(mega))
err(1, "read error or disk too small for test.");
}
static struct timeval tv1, tv2;
static void
T0(void)
{
fflush(stdout);
sync();
sleep(1);
sync();
sync();
gettimeofday(&tv1, NULL);
}
static void
TN(int count)
{
double dt;
gettimeofday(&tv2, NULL);
dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
dt += (tv2.tv_sec - tv1.tv_sec);
printf("%5d iter in %10.6f sec = %8.3f msec\n",
count, dt, dt * 1000.0 / count);
}
static void
TR(double count)
{
double dt;
gettimeofday(&tv2, NULL);
dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
dt += (tv2.tv_sec - tv1.tv_sec);
printf("%8.0f kbytes in %10.6f sec = %8.0f kbytes/sec\n",
count, dt, count / dt);
}
static void
speeddisk(int fd, off_t mediasize, u_int sectorsize)
{
int i;
uint b0, b1, sectorcount;
sectorcount = mediasize / sectorsize;
printf("Seek times:\n");
printf("\tFull stroke:\t");
b0 = 0;
b1 = sectorcount - 1 - 16384;
T0();
for (i = 0; i < 125; i++) {
rdsect(fd, b0, sectorsize);
b0 += 16384;
rdsect(fd, b1, sectorsize);
b1 -= 16384;
}
TN(250);
printf("\tHalf stroke:\t");
b0 = sectorcount / 4;
b1 = b0 + sectorcount / 2;
T0();
for (i = 0; i < 125; i++) {
rdsect(fd, b0, sectorsize);
b0 += 16384;
rdsect(fd, b1, sectorsize);
b1 += 16384;
}
TN(250);
printf("\tQuarter stroke:\t");
b0 = sectorcount / 4;
b1 = b0 + sectorcount / 4;
T0();
for (i = 0; i < 250; i++) {
rdsect(fd, b0, sectorsize);
b0 += 16384;
rdsect(fd, b1, sectorsize);
b1 += 16384;
}
TN(500);
printf("\tShort forward:\t");
b0 = sectorcount / 2;
T0();
for (i = 0; i < 400; i++) {
rdsect(fd, b0, sectorsize);
b0 += 16384;
}
TN(400);
printf("\tShort backward:\t");
b0 = sectorcount / 2;
T0();
for (i = 0; i < 400; i++) {
rdsect(fd, b0, sectorsize);
b0 -= 16384;
}
TN(400);
printf("\tSeq outer:\t");
b0 = 0;
T0();
for (i = 0; i < 2048; i++) {
rdsect(fd, b0, sectorsize);
b0++;
}
TN(2048);
printf("\tSeq inner:\t");
b0 = sectorcount - 2048 - 1;
T0();
for (i = 0; i < 2048; i++) {
rdsect(fd, b0, sectorsize);
b0++;
}
TN(2048);
printf("Transfer rates:\n");
printf("\toutside: ");
rdsect(fd, 0, sectorsize);
T0();
for (i = 0; i < 100; i++) {
rdmega(fd);
}
TR(100 * 1024);
printf("\tmiddle: ");
b0 = sectorcount / 2;
rdsect(fd, b0, sectorsize);
T0();
for (i = 0; i < 100; i++) {
rdmega(fd);
}
TR(100 * 1024);
printf("\tinside: ");
b0 = sectorcount - 100 * (1024*1024 / sectorsize) - 1;;
rdsect(fd, b0, sectorsize);
T0();
for (i = 0; i < 100; i++) {
rdmega(fd);
}
TR(100 * 1024);
printf("\n");
return;
}