353 lines
8.0 KiB
C
353 lines
8.0 KiB
C
/*-
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* Copyright (c) 2003 Poul-Henning Kamp
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libutil.h>
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#include <paths.h>
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#include <err.h>
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#include <sys/disk.h>
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#include <sys/time.h>
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static void
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usage(void)
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{
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fprintf(stderr, "usage: diskinfo [-ctv] disk ...\n");
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exit (1);
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}
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static int opt_c, opt_t, opt_v;
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static void speeddisk(int fd, off_t mediasize, u_int sectorsize);
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static void commandtime(int fd, off_t mediasize, u_int sectorsize);
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int
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main(int argc, char **argv)
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{
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int i, ch, fd, error;
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char buf[BUFSIZ];
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off_t mediasize;
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u_int sectorsize, fwsectors, fwheads;
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while ((ch = getopt(argc, argv, "ctv")) != -1) {
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switch (ch) {
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case 'c':
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opt_c = 1;
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opt_v = 1;
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break;
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case 't':
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opt_t = 1;
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opt_v = 1;
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break;
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case 'v':
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opt_v = 1;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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usage();
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for (i = 0; i < argc; i++) {
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fd = open(argv[i], O_RDONLY);
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if (fd < 0 && errno == ENOENT && *argv[i] != '/') {
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sprintf(buf, "%s%s", _PATH_DEV, argv[i]);
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fd = open(buf, O_RDONLY);
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}
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if (fd < 0)
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err(1, argv[i]);
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error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
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if (error)
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err(1, "%s: ioctl(DIOCGMEDIASIZE) failed, probably not a disk.", argv[i]);
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error = ioctl(fd, DIOCGSECTORSIZE, §orsize);
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if (error)
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err(1, "%s: DIOCGSECTORSIZE failed, probably not a disk.", argv[i]);
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error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
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if (error)
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fwsectors = 0;
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error = ioctl(fd, DIOCGFWHEADS, &fwheads);
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if (error)
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fwheads = 0;
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if (!opt_v) {
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printf("%s", argv[i]);
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printf("\t%u", sectorsize);
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printf("\t%jd", (intmax_t)mediasize);
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printf("\t%jd", (intmax_t)mediasize/sectorsize);
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if (fwsectors != 0 && fwheads != 0) {
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printf("\t%jd", (intmax_t)mediasize /
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(fwsectors * fwheads * sectorsize));
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printf("\t%u", fwheads);
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printf("\t%u", fwsectors);
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}
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} else {
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humanize_number(buf, 5, (int64_t)mediasize, "",
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HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
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printf("%s\n", argv[i]);
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printf("\t%-12u\t# sectorsize\n", sectorsize);
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printf("\t%-12jd\t# mediasize in bytes (%s)\n",
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(intmax_t)mediasize, buf);
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printf("\t%-12jd\t# mediasize in sectors\n",
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(intmax_t)mediasize/sectorsize);
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if (fwsectors != 0 && fwheads != 0) {
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printf("\t%-12jd\t# Cylinders according to firmware.\n", (intmax_t)mediasize /
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(fwsectors * fwheads * sectorsize));
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printf("\t%-12u\t# Heads according to firmware.\n", fwheads);
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printf("\t%-12u\t# Sectors according to firmware.\n", fwsectors);
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}
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}
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printf("\n");
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if (opt_c)
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commandtime(fd, mediasize, sectorsize);
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if (opt_t)
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speeddisk(fd, mediasize, sectorsize);
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close(fd);
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}
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exit (0);
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}
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static char sector[65536];
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static char mega[1024 * 1024];
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static void
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rdsect(int fd, u_int blockno, u_int sectorsize)
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{
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int error;
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lseek(fd, (off_t)blockno * sectorsize, SEEK_SET);
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error = read(fd, sector, sectorsize);
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if (error != (int)sectorsize)
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err(1, "read error or disk too small for test.");
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}
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static void
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rdmega(int fd)
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{
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int error;
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error = read(fd, mega, sizeof(mega));
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if (error != sizeof(mega))
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err(1, "read error or disk too small for test.");
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}
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static struct timeval tv1, tv2;
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static void
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T0(void)
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{
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fflush(stdout);
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sync();
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sleep(1);
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sync();
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sync();
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gettimeofday(&tv1, NULL);
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}
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static void
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TN(int count)
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{
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double dt;
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gettimeofday(&tv2, NULL);
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dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
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dt += (tv2.tv_sec - tv1.tv_sec);
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printf("%5d iter in %10.6f sec = %8.3f msec\n",
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count, dt, dt * 1000.0 / count);
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}
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static void
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TR(double count)
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{
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double dt;
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gettimeofday(&tv2, NULL);
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dt = (tv2.tv_usec - tv1.tv_usec) / 1e6;
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dt += (tv2.tv_sec - tv1.tv_sec);
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printf("%8.0f kbytes in %10.6f sec = %8.0f kbytes/sec\n",
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count, dt, count / dt);
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}
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static void
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speeddisk(int fd, off_t mediasize, u_int sectorsize)
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{
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int i;
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uint b0, b1, sectorcount;
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sectorcount = mediasize / sectorsize;
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printf("Seek times:\n");
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printf("\tFull stroke:\t");
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b0 = 0;
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b1 = sectorcount - 1 - 16384;
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T0();
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for (i = 0; i < 125; i++) {
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rdsect(fd, b0, sectorsize);
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b0 += 16384;
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rdsect(fd, b1, sectorsize);
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b1 -= 16384;
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}
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TN(250);
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printf("\tHalf stroke:\t");
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b0 = sectorcount / 4;
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b1 = b0 + sectorcount / 2;
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T0();
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for (i = 0; i < 125; i++) {
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rdsect(fd, b0, sectorsize);
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b0 += 16384;
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rdsect(fd, b1, sectorsize);
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b1 += 16384;
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}
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TN(250);
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printf("\tQuarter stroke:\t");
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b0 = sectorcount / 4;
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b1 = b0 + sectorcount / 4;
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T0();
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for (i = 0; i < 250; i++) {
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rdsect(fd, b0, sectorsize);
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b0 += 16384;
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rdsect(fd, b1, sectorsize);
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b1 += 16384;
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}
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TN(500);
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printf("\tShort forward:\t");
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b0 = sectorcount / 2;
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T0();
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for (i = 0; i < 400; i++) {
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rdsect(fd, b0, sectorsize);
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b0 += 16384;
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}
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TN(400);
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printf("\tShort backward:\t");
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b0 = sectorcount / 2;
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T0();
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for (i = 0; i < 400; i++) {
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rdsect(fd, b0, sectorsize);
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b0 -= 16384;
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}
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TN(400);
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printf("\tSeq outer:\t");
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b0 = 0;
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T0();
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for (i = 0; i < 2048; i++) {
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rdsect(fd, b0, sectorsize);
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b0++;
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}
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TN(2048);
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printf("\tSeq inner:\t");
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b0 = sectorcount - 2048 - 1;
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T0();
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for (i = 0; i < 2048; i++) {
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rdsect(fd, b0, sectorsize);
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b0++;
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}
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TN(2048);
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printf("Transfer rates:\n");
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printf("\toutside: ");
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rdsect(fd, 0, sectorsize);
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T0();
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for (i = 0; i < 100; i++) {
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rdmega(fd);
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}
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TR(100 * 1024);
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printf("\tmiddle: ");
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b0 = sectorcount / 2;
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rdsect(fd, b0, sectorsize);
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T0();
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for (i = 0; i < 100; i++) {
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rdmega(fd);
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}
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TR(100 * 1024);
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printf("\tinside: ");
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b0 = sectorcount - 100 * (1024*1024 / sectorsize) - 1;;
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rdsect(fd, b0, sectorsize);
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T0();
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for (i = 0; i < 100; i++) {
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rdmega(fd);
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}
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TR(100 * 1024);
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printf("\n");
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return;
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}
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static void
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commandtime(int fd, off_t mediasize, u_int sectorsize)
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{
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double dtmega, dtsector;
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int i;
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printf("I/O command overhead:\n");
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i = mediasize;
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rdsect(fd, 0, sectorsize);
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T0();
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for (i = 0; i < 10; i++)
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rdmega(fd);
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gettimeofday(&tv2, NULL);
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dtmega = (tv2.tv_usec - tv1.tv_usec) / 1e6;
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dtmega += (tv2.tv_sec - tv1.tv_sec);
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printf("\ttime to read 10MB block %10.6f sec\t= %8.3f msec/sector\n",
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dtmega, dtmega*100/2048);
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rdsect(fd, 0, sectorsize);
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T0();
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for (i = 0; i < 20480; i++)
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rdsect(fd, 0, sectorsize);
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gettimeofday(&tv2, NULL);
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dtsector = (tv2.tv_usec - tv1.tv_usec) / 1e6;
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dtsector += (tv2.tv_sec - tv1.tv_sec);
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printf("\ttime to read 20480 sectors %10.6f sec\t= %8.3f msec/sector\n",
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dtsector, dtsector*100/2048);
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printf("\tcalculated command overhead\t\t\t= %8.3f msec/sector\n",
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(dtsector - dtmega)*100/2048);
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printf("\n");
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return;
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}
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