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Diffstat (limited to 'usr.sbin/diskinfo/diskinfo.c')
-rw-r--r--usr.sbin/diskinfo/diskinfo.c388
1 files changed, 388 insertions, 0 deletions
diff --git a/usr.sbin/diskinfo/diskinfo.c b/usr.sbin/diskinfo/diskinfo.c
new file mode 100644
index 0000000..90beba2
--- /dev/null
+++ b/usr.sbin/diskinfo/diskinfo.c
@@ -0,0 +1,388 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <strings.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/param.h>
+#include <sys/time.h>
+
+static void
+usage(void)
+{
+ fprintf(stderr, "usage: diskinfo [-ctv] disk ...\n");
+ exit (1);
+}
+
+static int opt_c, opt_t, opt_v;
+
+static void speeddisk(int fd, off_t mediasize, u_int sectorsize);
+static void commandtime(int fd, off_t mediasize, u_int sectorsize);
+
+int
+main(int argc, char **argv)
+{
+ int i, ch, fd, error, exitval = 0;
+ char buf[BUFSIZ], ident[DISK_IDENT_SIZE], physpath[MAXPATHLEN];
+ off_t mediasize, stripesize, stripeoffset;
+ u_int sectorsize, fwsectors, fwheads;
+
+ while ((ch = getopt(argc, argv, "ctv")) != -1) {
+ switch (ch) {
+ case 'c':
+ opt_c = 1;
+ opt_v = 1;
+ break;
+ 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) {
+ warn("%s", argv[i]);
+ exitval = 1;
+ goto out;
+ }
+ error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
+ if (error) {
+ warnx("%s: ioctl(DIOCGMEDIASIZE) failed, probably not a disk.", argv[i]);
+ exitval = 1;
+ goto out;
+ }
+ error = ioctl(fd, DIOCGSECTORSIZE, &sectorsize);
+ if (error) {
+ warnx("%s: ioctl(DIOCGSECTORSIZE) failed, probably not a disk.", argv[i]);
+ exitval = 1;
+ goto out;
+ }
+ error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
+ if (error)
+ fwsectors = 0;
+ error = ioctl(fd, DIOCGFWHEADS, &fwheads);
+ if (error)
+ fwheads = 0;
+ error = ioctl(fd, DIOCGSTRIPESIZE, &stripesize);
+ if (error)
+ stripesize = 0;
+ error = ioctl(fd, DIOCGSTRIPEOFFSET, &stripeoffset);
+ if (error)
+ stripeoffset = 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);
+ printf("\t%jd", (intmax_t)stripesize);
+ printf("\t%jd", (intmax_t)stripeoffset);
+ 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);
+ printf("\t%-12jd\t# stripesize\n", stripesize);
+ printf("\t%-12jd\t# stripeoffset\n", stripeoffset);
+ 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);
+ }
+ if (ioctl(fd, DIOCGIDENT, ident) == 0)
+ printf("\t%-12s\t# Disk ident.\n", ident);
+ if (ioctl(fd, DIOCGPHYSPATH, physpath) == 0)
+ printf("\t%-12s\t# Physical path\n", physpath);
+ }
+ printf("\n");
+ if (opt_c)
+ commandtime(fd, mediasize, sectorsize);
+ if (opt_t)
+ speeddisk(fd, mediasize, sectorsize);
+out:
+ close(fd);
+ }
+ exit (exitval);
+}
+
+
+static char sector[65536];
+static char mega[1024 * 1024];
+
+static void
+rdsect(int fd, off_t blockno, u_int sectorsize)
+{
+ int error;
+
+ lseek(fd, (off_t)blockno * sectorsize, SEEK_SET);
+ error = read(fd, sector, sectorsize);
+ if (error == -1)
+ err(1, "read");
+ if (error != (int)sectorsize)
+ errx(1, "disk too small for test.");
+}
+
+static void
+rdmega(int fd)
+{
+ int error;
+
+ error = read(fd, mega, sizeof(mega));
+ if (error == -1)
+ err(1, "read");
+ if (error != sizeof(mega))
+ errx(1, "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 bulk, i;
+ off_t b0, b1, sectorcount, step;
+
+ sectorcount = mediasize / sectorsize;
+ step = 1ULL << (flsll(sectorcount / (4 * 200)) - 1);
+ if (step > 16384)
+ step = 16384;
+ bulk = mediasize / (1024 * 1024);
+ if (bulk > 100)
+ bulk = 100;
+
+ printf("Seek times:\n");
+ printf("\tFull stroke:\t");
+ b0 = 0;
+ b1 = sectorcount - step;
+ T0();
+ for (i = 0; i < 125; i++) {
+ rdsect(fd, b0, sectorsize);
+ b0 += step;
+ rdsect(fd, b1, sectorsize);
+ b1 -= step;
+ }
+ 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 += step;
+ rdsect(fd, b1, sectorsize);
+ b1 += step;
+ }
+ 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 += step;
+ rdsect(fd, b1, sectorsize);
+ b1 += step;
+ }
+ TN(500);
+
+ printf("\tShort forward:\t");
+ b0 = sectorcount / 2;
+ T0();
+ for (i = 0; i < 400; i++) {
+ rdsect(fd, b0, sectorsize);
+ b0 += step;
+ }
+ TN(400);
+
+ printf("\tShort backward:\t");
+ b0 = sectorcount / 2;
+ T0();
+ for (i = 0; i < 400; i++) {
+ rdsect(fd, b0, sectorsize);
+ b0 -= step;
+ }
+ 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;
+ 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 < bulk; i++) {
+ rdmega(fd);
+ }
+ TR(bulk * 1024);
+
+ printf("\tmiddle: ");
+ b0 = sectorcount / 2 - bulk * (1024*1024 / sectorsize) / 2 - 1;
+ rdsect(fd, b0, sectorsize);
+ T0();
+ for (i = 0; i < bulk; i++) {
+ rdmega(fd);
+ }
+ TR(bulk * 1024);
+
+ printf("\tinside: ");
+ b0 = sectorcount - bulk * (1024*1024 / sectorsize) - 1;
+ rdsect(fd, b0, sectorsize);
+ T0();
+ for (i = 0; i < bulk; i++) {
+ rdmega(fd);
+ }
+ TR(bulk * 1024);
+
+ printf("\n");
+ return;
+}
+
+static void
+commandtime(int fd, off_t mediasize, u_int sectorsize)
+{
+ double dtmega, dtsector;
+ int i;
+
+ printf("I/O command overhead:\n");
+ i = mediasize;
+ rdsect(fd, 0, sectorsize);
+ T0();
+ for (i = 0; i < 10; i++)
+ rdmega(fd);
+ gettimeofday(&tv2, NULL);
+ dtmega = (tv2.tv_usec - tv1.tv_usec) / 1e6;
+ dtmega += (tv2.tv_sec - tv1.tv_sec);
+
+ printf("\ttime to read 10MB block %10.6f sec\t= %8.3f msec/sector\n",
+ dtmega, dtmega*100/2048);
+
+ rdsect(fd, 0, sectorsize);
+ T0();
+ for (i = 0; i < 20480; i++)
+ rdsect(fd, 0, sectorsize);
+ gettimeofday(&tv2, NULL);
+ dtsector = (tv2.tv_usec - tv1.tv_usec) / 1e6;
+ dtsector += (tv2.tv_sec - tv1.tv_sec);
+
+ printf("\ttime to read 20480 sectors %10.6f sec\t= %8.3f msec/sector\n",
+ dtsector, dtsector*100/2048);
+ printf("\tcalculated command overhead\t\t\t= %8.3f msec/sector\n",
+ (dtsector - dtmega)*100/2048);
+
+ printf("\n");
+ return;
+}
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