From 64d3a8bc2198c8655bd946674dfd47ce8fb31a8a Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Wed, 9 Apr 2003 10:52:10 +0000
Subject: Diskinfo is a small program to access the basic properties of a disk
 device: sectorsize, mediasize etc.
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

It also contains a small and naïve benchmark which reports on seek
and transfer performance.
---
 usr.sbin/diskinfo/Makefile   |  11 ++
 usr.sbin/diskinfo/diskinfo.8 |  69 ++++++++++
 usr.sbin/diskinfo/diskinfo.c | 303 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 383 insertions(+)
 create mode 100644 usr.sbin/diskinfo/Makefile
 create mode 100644 usr.sbin/diskinfo/diskinfo.8
 create mode 100644 usr.sbin/diskinfo/diskinfo.c

(limited to 'usr.sbin/diskinfo')

diff --git a/usr.sbin/diskinfo/Makefile b/usr.sbin/diskinfo/Makefile
new file mode 100644
index 0000000..e0c9cc7
--- /dev/null
+++ b/usr.sbin/diskinfo/Makefile
@@ -0,0 +1,11 @@
+# $FreeBSD$
+
+PROG=	diskinfo
+MAN=	diskinfo.8
+
+.include <bsd.prog.mk>
+
+test:	${PROG}
+	./${PROG} /dev/ad4 md50
+	./${PROG} -v /dev/ad4 md50
+	./${PROG} -t /dev/ad4
diff --git a/usr.sbin/diskinfo/diskinfo.8 b/usr.sbin/diskinfo/diskinfo.8
new file mode 100644
index 0000000..876567f
--- /dev/null
+++ b/usr.sbin/diskinfo/diskinfo.8
@@ -0,0 +1,69 @@
+.\"
+.\" 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd April 9, 2003
+.Dt DISKINFO 8
+.Os
+.Sh NAME
+.Nm diskinfo
+.Nd get information about disk device
+.Sh SYNOPSIS
+.Nm
+.Op Fl v
+.Op Fl t
+.Ar disk ...
+.Sh DESCRIPTION
+The
+.Nm
+utility prints out information about a diskdevice and optionally runs a na�ve performance test on the device.
+.Pp
+If given no arguments the output will be a single line per specified device
+with the following fields:  device name, sectorsize, media size in bytes,
+media size in sectors, firmware cylinders, firmware heads and firmware sectors.
+The last three fields are only present if the information is available.
+.Pp
+If given the
+.Fl v
+option, the fields will be printed one per line with a descriptive comment.
+.Pp
+The
+.Fl t
+option triggers a simple and rather na�ve benchmark of the disks seek
+and transfer performance.
+.Sh AUTHORS
+.An Poul-Henning Kamp
+.Sh BUGS
+There are in order of increasing severity lies,
+damn lines, statistics and computer benchmarks.
+.Sh HISTORY
+.The
+.Nm
+command appeared in
+.Fx 5.1
diff --git a/usr.sbin/diskinfo/diskinfo.c b/usr.sbin/diskinfo/diskinfo.c
new file mode 100644
index 0000000..0db8756
--- /dev/null
+++ b/usr.sbin/diskinfo/diskinfo.c
@@ -0,0 +1,303 @@
+/*-
+ * 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 <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <err.h>
+#include <sys/disk.h>
+
+static void
+usage(void)
+{
+	fprintf(stderr, "Usage: diskinfo [-tv]\n");
+	exit (1);
+}
+
+static int opt_t, opt_v;
+
+static void speeddisk(const char *name, 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;
+
+	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, &sectorsize);
+		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 {
+			printf("%s\n", argv[i]);
+			printf("\t%-12u\t# sectorsize\n", sectorsize);
+			printf("\t%-12jd\t# mediasize in bytes\n",
+			    (intmax_t)mediasize);
+			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(argv[i], 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, blockno * sectorsize, SEEK_SET);
+	error = read(fd, sector, sectorsize);
+	if (error != 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(const char *name, int fd, off_t mediasize, u_int sectorsize)
+{
+	int error, i;
+	uint b0, b1, sectorcount;
+
+	off_t size;
+	sectorcount = mediasize / sectorsize;
+
+	printf("Seek times:\n");
+	printf("\tFull stroke:\t");
+	b0 = 0;
+	b1 = sectorcount - 1 - 125 * 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 < 1000; i++) {
+		rdsect(fd, b0, sectorsize);
+		b0 += 16384;
+	}
+	TN(1000);
+
+	printf("\tShort backward:\t");
+	b0 = sectorcount / 2;
+	T0();
+	for (i = 0; i < 1000; i++) {
+		rdsect(fd, b0, sectorsize);
+		b0 -= 16384;
+	}
+	TN(1000);
+
+	printf("\tSeq outer:\t");
+	b0 = 0;
+	T0();
+	for (i = 0; i < 20480; i++) {
+		rdsect(fd, b0, sectorsize);
+		b0++;
+	}
+	TN(20480);
+
+	printf("\tSeq inner:\t");
+	b0 = sectorcount - 20480 - 1;
+	T0();
+	for (i = 0; i < 20480; i++) {
+		rdsect(fd, b0, sectorsize);
+		b0++;
+	}
+	TN(20480);
+
+	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;
+}
-- 
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