diskstat

git-svn-id: http://opensvn.csie.org/pttbbs/pttbbs/trunk/pttbbs@744 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 688 insertions, 72 deletions

diff --git a/util/diskstat.c b/util/diskstat.c
index 86b6291c..0eef081b 100644
--- a/util/diskstat.c
+++ b/util/diskstat.c
@@ -1,99 +1,715 @@
+#ifndef FreeBSD
+    #include <stdio.h>
+    int main(int argc, char **argv)
+    {
+	puts("sorry, this program is designed for FreeBSD only");
+	return 0;
+    }
+#else
+/*
+ * Copyright (c) 1997, 1998  Kenneth D. Merry.
+ * 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 name of the author 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/iostat/iostat.c,v 1.17.2.2 2001/07/19 04:15:42 kris Exp $
+ */
+/*
+ * Parts of this program are derived from the original FreeBSD iostat
+ * program:
+ */
+/*-
+ * Copyright (c) 1986, 1991, 1993
+ *	The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+/*
+ * Ideas for the new iostat statistics output modes taken from the NetBSD
+ * version of iostat:
+ */
+/*
+ * Copyright (c) 1996 John M. Vinopal
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed for the NetBSD Project
+ *      by John M. Vinopal.
+ * 4. The name of the author 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 ``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 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.
+ */
+
+
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/dkstat.h>
+
+#include <err.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <kvm.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/dkstat.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
 #include <devstat.h>
-#include <err.h>
 
-int main(int argc, char **argv)
-{
-    return 0;
-}
+struct nlist namelist[] = {
+#define X_TK_NIN	0
+	{ "_tk_nin" },
+#define X_TK_NOUT	1
+	{ "_tk_nout" },
+#define X_CP_TIME	2
+	{ "_cp_time" },
+#define X_HZ		3
+	{ "_hz" },
+#define X_STATHZ	4
+	{ "_stathz" },
+#define X_END		4
+	{ NULL },
+};
 
-#if 0
-typedef enum {
-	DS_MATCHTYPE_NONE,
-	DS_MATCHTYPE_SPEC,
-	DS_MATCHTYPE_PATTERN
-} last_match_type;
-last_match_type last_type;
+struct statinfo cur, last;
+int num_devices;
 struct device_selection *dev_select;
-long generation;
-int num_devices, num_selected;
-int num_selections;
-long select_generation;
-struct devstat_match *matches = NULL;
-int num_matches = 0;
-char **specified_devices;
-int num_devices_specified = 0;
+int maxshowdevs;
+int dflag = 1, Iflag = 0, Cflag = 0, Tflag = 0, oflag = 0, Kflag = 0, Bflag = 1;
+
+#define nlread(x, v) \
+	kvm_read(kd, namelist[x].n_value, &(v), sizeof(v))
+
+/* local function declarations */
+static void usage(void);
+static void phdr(int signo);
+static void devstats(int perf_select);
+static void cpustats(void);
+static void printresult(int p);
+
+static void
+usage(void)
+{
+	/*
+	 * We also support the following 'traditional' syntax:
+	 * iostat [drives] [wait [count]]
+	 * This isn't mentioned in the man page, or the usage statement,
+	 * but it is supported.
+	 */
+	fprintf(stderr, "usage: iostat [-CdhIKoT?] [-c count] [-M core]"
+		" [-n devs] [-N system]\n"
+		"\t      [-t type,if,pass] [-w wait] [drives]\n");
+}
 
 int
-dsinit(int maxshowdevs, struct statinfo *s1, struct statinfo *s2,
-       struct statinfo *s3)
+main(int argc, char **argv)
 {
-	generation = 0;
-	num_devices = 0;
-	num_selected = 0;
-	num_selections = 0;
-	select_generation = 0;
-	last_type = DS_MATCHTYPE_NONE;
-
-	if (getdevs(s1) == -1)
+	int c;
+	register int i;
+	int tflag = 0, hflag = 0, cflag = 0, wflag = 1, nflag = 0;
+	int count = 0, waittime = 2;
+	char *memf = NULL, *nlistf = NULL;
+	struct devstat_match *matches;
+	int num_matches = 0;
+        char errbuf[_POSIX2_LINE_MAX];
+	kvm_t	 *kd;
+	int hz, stathz;
+	int headercount;
+	long generation;
+	int num_devices_specified;
+	int num_selected, num_selections;
+	long select_generation;
+	char **specified_devices;
+	devstat_select_mode select_mode;
+
+	matches = NULL;
+	maxshowdevs = 10;
+
+	while ((c = getopt(argc, argv, "c:CdhIKM:n:N:ot:Tw:?")) != -1) {
+		switch(c) {
+			case 'c':
+				cflag++;
+				count = atoi(optarg);
+				if (count < 1)
+					errx(1, "count %d is < 1", count);
+				break;
+			case 'C':
+				Cflag++;
+				break;
+			case 'd':
+				dflag++;
+				break;
+			case 'h':
+				hflag++;
+				break;
+			case 'I':
+				Iflag++;
+				break;
+			case 'K':
+				Kflag++;
+				break;
+			case 'M':
+				memf = optarg;
+				break;
+			case 'n':
+				nflag++;
+				maxshowdevs = atoi(optarg);
+				if (maxshowdevs < 0)
+					errx(1, "number of devices %d is < 0",
+					     maxshowdevs);
+				break;
+			case 'N':
+				nlistf = optarg;
+				break;
+			case 'o':
+				oflag++;
+				break;
+			case 't':
+				tflag++;
+				if (buildmatch(optarg, &matches, 
+					       &num_matches) != 0)
+					errx(1, "%s", devstat_errbuf);
+				break;
+			case 'T':
+				Tflag++;
+				break;
+			case 'w':
+				wflag++;
+				waittime = atoi(optarg);
+				if (waittime < 1)
+					errx(1, "wait time is < 1");
+				break;
+			default:
+				usage();
+				exit(1);
+				break;
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	/*
+	 * Discard setgid privileges if not the running kernel so that bad
+	 * guys can't print interesting stuff from kernel memory.
+	 */
+	if (nlistf != NULL || memf != NULL)
+		setgid(getgid());
+
+	/*
+	 * Make sure that the userland devstat version matches the kernel
+	 * devstat version.  If not, exit and print a message informing 
+	 * the user of his mistake.
+	 */
+	if (checkversion() < 0)
 		errx(1, "%s", devstat_errbuf);
 
-	num_devices = s1->dinfo->numdevs;
-	generation = s1->dinfo->generation;
+#if 0
+	/*
+	 * Figure out how many devices we should display.
+	 */
+	if (nflag == 0) {
+		if (oflag > 0) {
+			if ((dflag > 0) && (Cflag == 0) && (Tflag == 0))
+				maxshowdevs = 5;
+			else if ((dflag > 0) && (Tflag > 0) && (Cflag == 0))
+				maxshowdevs = 5;
+			else
+				maxshowdevs = 4;
+		} else {
+			if ((dflag > 0) && (Cflag == 0))
+				maxshowdevs = 4;		
+			else
+				maxshowdevs = 3;
+		}
+	}
+#endif
+
+	signal(SIGINT, printresult);
+	/* find out how many devices we have */
+	if ((num_devices = getnumdevs()) < 0)
+		err(1, "can't get number of devices");
+
+	if ((cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
+	     NULL)
+		err(1, "devinfo malloc failed");
+	if ((last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
+	     NULL)
+		err(1, "devinfo malloc failed");
+	bzero(cur.dinfo, sizeof(struct devinfo));
+	bzero(last.dinfo, sizeof(struct devinfo));
+
+	/*
+	 * Grab all the devices.  We don't look to see if the list has
+	 * changed here, since it almost certainly has.  We only look for
+	 * errors.
+	 */
+	if (getdevs(&cur) == -1)
+		errx(1, "%s", devstat_errbuf);
+
+	num_devices = cur.dinfo->numdevs;
+	generation = cur.dinfo->generation;
+
+	/*
+	 * If the user specified any devices on the command line, see if
+	 * they are in the list of devices we have now.
+	 */
+	if ((specified_devices = (char **)malloc(sizeof(char *))) == NULL)
+		err(1, "specified_devices malloc failed");
+	for (num_devices_specified = 0; *argv; ++argv) {
+		if (isdigit(**argv))
+			break;
+		num_devices_specified++;
+		specified_devices = (char **)realloc(specified_devices,
+						     sizeof(char *) *
+						     num_devices_specified);
+		specified_devices[num_devices_specified - 1] = *argv;
+
+	}
+	if (nflag == 0 && maxshowdevs < num_devices_specified)
+		maxshowdevs = num_devices_specified;
 
 	dev_select = NULL;
 
+	if ((num_devices_specified == 0) && (num_matches == 0))
+		select_mode = DS_SELECT_ADD;
+	else
+		select_mode = DS_SELECT_ONLY;
+
 	/*
 	 * At this point, selectdevs will almost surely indicate that the
 	 * device list has changed, so we don't look for return values of 0
 	 * or 1.  If we get back -1, though, there is an error.
 	 */
-	if (selectdevs(&dev_select, &num_selected, &num_selections,
-		       &select_generation, generation, s1->dinfo->devices,
-		       num_devices, NULL, 0, NULL, 0, DS_SELECT_ADD,
-		       maxshowdevs, 0) == -1)
+	if (selectdevs(&dev_select, &num_selected,
+		       &num_selections, &select_generation,
+		       generation, cur.dinfo->devices, num_devices,
+		       matches, num_matches,
+		       specified_devices, num_devices_specified,
+		       select_mode, maxshowdevs, hflag) == -1)
 		errx(1, "%s", devstat_errbuf);
 
-	return(1);
+	/*
+	 * Look for the traditional wait time and count arguments.
+	 */
+	if (*argv) {
+		waittime = atoi(*argv);
+
+		/* Let the user know he goofed, but keep going anyway */
+		if (wflag != 0) 
+			warnx("discarding previous wait interval, using"
+			      " %d instead", waittime);
+		wflag++;
+
+		if (*++argv) {
+			count = atoi(*argv);
+			if (cflag != 0)
+				warnx("discarding previous count, using %d"
+				      " instead", count);
+			cflag++;
+		} else
+			count = -1;
+	}
+
+	/*
+	 * If the user specified a count, but not an interval, we default
+	 * to an interval of 1 second.
+	 */
+	if ((wflag == 0) && (cflag > 0))
+		waittime = 1;
+
+	/*
+	 * If the user specified a wait time, but not a count, we want to
+	 * go on ad infinitum.  This can be redundant if the user uses the
+	 * traditional method of specifying the wait, since in that case we
+	 * already set count = -1 above.  Oh well.
+	 */
+	if ((wflag > 0) && (cflag == 0))
+		count = -1;
+
+	kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
+
+	if (kd == 0)
+		errx(1, "kvm_openfiles: %s", errbuf);
+
+	if (kvm_nlist(kd, namelist) == -1)
+		errx(1, "kvm_nlist: %s", kvm_geterr(kd));
+
+	(void)nlread(X_HZ, hz);
+	(void)nlread(X_STATHZ, stathz);
+	if (stathz)
+		hz = stathz;
+
+	/*
+	 * If the user stops the program (control-Z) and then resumes it,
+	 * print out the header again.
+	 */
+	(void)signal(SIGCONT, phdr);
+
+	for (headercount = 1;;) {
+		struct devinfo *tmp_dinfo;
+		long tmp;
+		double etime;
+
+		if (!--headercount) {
+			phdr(0);
+			headercount = 20;
+		}
+		(void)kvm_read(kd, namelist[X_TK_NIN].n_value,
+		    &cur.tk_nin, sizeof(cur.tk_nin));
+		(void)kvm_read(kd, namelist[X_TK_NOUT].n_value,
+		    &cur.tk_nout, sizeof(cur.tk_nout));
+		(void)kvm_read(kd, namelist[X_CP_TIME].n_value,
+		    cur.cp_time, sizeof(cur.cp_time));
+
+		tmp_dinfo = last.dinfo;
+		last.dinfo = cur.dinfo;
+		cur.dinfo = tmp_dinfo;
+
+		last.busy_time = cur.busy_time;
+
+		/*
+		 * Here what we want to do is refresh our device stats.
+		 * getdevs() returns 1 when the device list has changed.
+		 * If the device list has changed, we want to go through
+		 * the selection process again, in case a device that we
+		 * were previously displaying has gone away.
+		 */
+		switch (getdevs(&cur)) {
+		case -1:
+			errx(1, "%s", devstat_errbuf);
+			break;
+		case 1: {
+			int retval;
+
+			num_devices = cur.dinfo->numdevs;
+			generation = cur.dinfo->generation;
+			retval = selectdevs(&dev_select, &num_selected,
+					    &num_selections, &select_generation,
+					    generation, cur.dinfo->devices,
+					    num_devices, matches, num_matches,
+					    specified_devices,
+					    num_devices_specified,
+					    select_mode, maxshowdevs, hflag);
+			switch(retval) {
+			case -1:
+				errx(1, "%s", devstat_errbuf);
+				break;
+			case 1:
+				phdr(0);
+				headercount = 20;
+				break;
+			default:
+				break;
+			}
+			break;
+		}
+		default:
+			break;
+		}
+
+		/*
+		 * We only want to re-select devices if we're in 'top'
+		 * mode.  This is the only mode where the devices selected
+		 * could actually change.
+		 */
+		if (hflag > 0) {
+			int retval;
+			retval = selectdevs(&dev_select, &num_selected,
+					    &num_selections, &select_generation,
+					    generation, cur.dinfo->devices,
+					    num_devices, matches, num_matches,
+					    specified_devices,
+					    num_devices_specified,
+					    select_mode, maxshowdevs, hflag);
+			switch(retval) {
+			case -1:
+				errx(1,"%s", devstat_errbuf);
+				break;
+			case 1:
+				phdr(0);
+				headercount = 20;
+				break;
+			default:
+				break;
+			}
+		}
+
+		tmp = cur.tk_nin;
+		cur.tk_nin -= last.tk_nin;
+		last.tk_nin = tmp;
+		tmp = cur.tk_nout;
+		cur.tk_nout -= last.tk_nout;
+		last.tk_nout = tmp;
+
+		etime = 0.0;
+
+#define X(fld)	tmp = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = tmp
+
+		for (i = 0; i < CPUSTATES; i++) {
+			X(cp_time);
+			etime += cur.cp_time[i];
+		}
+		if (etime == 0.0)
+			etime = 1.0;
+		etime /= (float)hz;
+		if ((dflag == 0) || (Tflag > 0))
+			printf("%4.0f%5.0f", cur.tk_nin / etime, 
+				cur.tk_nout/etime);
+		devstats(hflag);
+		if ((dflag == 0) || (Cflag > 0))
+			cpustats();
+		printf("\n");
+		fflush(stdout);
+
+		if (count >= 0 && --count <= 0)
+			break;
+
+		sleep(waittime);
+	}
+
+	exit(0);
 }
 
 static void
-dinfo(dn, lc, now, then)
-     int dn, lc;
-     struct statinfo *now, *then;
+phdr(int signo)
 {
-    long double transfers_per_second;
-    long double kb_per_transfer, mb_per_second;
-    long double elapsed_time, device_busy;
-    int di;
-
-    di = dev_select[dn].position;
-
-    elapsed_time = devstat_compute_etime(now->busy_time,
-	 then ? then->busy_time : now->dinfo->devices[di].dev_creation_time);
-
-    device_busy =  devstat_compute_etime(now->dinfo->devices[di].busy_time,
-			 then ? then->dinfo->devices[di].busy_time :
-			 now->dinfo->devices[di].dev_creation_time);
-
-    if ((device_busy == 0) && (transfers_per_second > 5))
-	/* the device has been 100% busy, fake it because               
-	 * as long as the device is 100% busy the busy_time             
-	 * field in the devstat struct is not updated */
-	device_busy = elapsed_time;
-    if (device_busy > elapsed_time)
-	/* this normally happens after one or more periods              
-	 * where the device has been 100% busy, correct it */
-	device_busy = elapsed_time;
-
-    /*
-    putlongdouble(kb_per_transfer, DISKROW + 1, lc, 5, 2, 0);
-    putlongdouble(transfers_per_second, DISKROW + 2, lc, 5, 0, 0);
-    putlongdouble(mb_per_second, DISKROW + 3, lc, 5, 2, 0);
-    putlongdouble(device_busy * 100 / elapsed_time, DISKROW + 4, lc, 5, 0,  0);
-    */
+	register int i;
+	int printed;
+
+	if ((dflag == 0) || (Tflag > 0))
+		(void)printf("      tty");
+	for (i = 0, printed=0;(i < num_devices) && (printed < maxshowdevs);i++){
+		int di;
+		if ((dev_select[i].selected != 0)
+		 && (dev_select[i].selected <= maxshowdevs)) {
+			di = dev_select[i].position;
+			if (oflag > 0)
+				(void)printf("%12.6s%d ", 
+					    cur.dinfo->devices[di].device_name,
+					    cur.dinfo->devices[di].unit_number);
+			else
+				printf("%4s%d ",
+					    cur.dinfo->devices[di].device_name,
+					    cur.dinfo->devices[di].unit_number);
+			printed++;
+		}
+	}
+	if ((dflag == 0) || (Cflag > 0))
+		(void)printf("            cpu\n");
+	else
+		(void)printf("\n");
+
+	if ((dflag == 0) || (Tflag > 0))
+		(void)printf(" tin tout");
+
+	for (i=0, printed = 0;(i < num_devices) && (printed < maxshowdevs);i++){
+		if ((dev_select[i].selected != 0)
+		 && (dev_select[i].selected <= maxshowdevs)) {
+			if (oflag > 0) {
+				if (Iflag == 0)
+					(void)printf(" sps tps msps ");
+				else
+					(void)printf(" blk xfr msps ");
+			} else {
+			    if(Bflag)
+				printf(" busy ");
+			    else if (Iflag == 0)
+				printf("  KB/t tps  MB/s ");
+			    else
+				printf("  KB/t xfrs   MB ");
+			}
+			printed++;
+		}
+	}
+	if ((dflag == 0) || (Cflag > 0))
+		(void)printf(" us ni sy in id\n");
+	else
+		printf("\n");
+
 }
 
-#endif
+int     counttimes, busydata[1024];
+
+static void printresult(int p)
+{
+    int     dn;
+    for (dn = 0; dn < num_devices; dn++)
+	printf(" %3d%% ", (busydata[dn] / counttimes));
+    printf("\n");
+    exit(0);
+}
+
+static void
+devstats(int perf_select)
+{
+	register int dn;
+	long double transfers_per_second;
+	long double kb_per_transfer, mb_per_second;
+	u_int64_t total_bytes, total_transfers, total_blocks;
+	long double busy_seconds;
+	long double total_mb;
+	long double blocks_per_second, ms_per_transaction;
+	long double device_busy;
+
+	/*
+	 * Calculate elapsed time up front, since it's the same for all
+	 * devices.
+	 */
+	busy_seconds = compute_etime(cur.busy_time, last.busy_time);
+
+	for (dn = 0; dn < num_devices; dn++) {
+		int di;
+
+		if (((perf_select == 0) && (dev_select[dn].selected == 0))
+		 || (dev_select[dn].selected > maxshowdevs))
+			continue;
+
+		di = dev_select[dn].position;
+
+		device_busy = compute_etime(cur.dinfo->devices[di].busy_time,
+					    last.dinfo->devices[di].busy_time);
+		
+		busydata[dn] += (int)(device_busy*100/busy_seconds);
+		if (compute_stats(&cur.dinfo->devices[di],
+				  &last.dinfo->devices[di], busy_seconds,
+				  &total_bytes, &total_transfers,
+				  &total_blocks, &kb_per_transfer,
+				  &transfers_per_second, &mb_per_second, 
+				  &blocks_per_second, &ms_per_transaction)!= 0)
+			errx(1, "%s", devstat_errbuf);
+
+		if (perf_select != 0) {
+			dev_select[dn].bytes = total_bytes;
+			if ((dev_select[dn].selected == 0)
+			 || (dev_select[dn].selected > maxshowdevs))
+				continue;
+		}
+
+		if (Kflag) {
+			int block_size = cur.dinfo->devices[di].block_size;
+			total_blocks = total_blocks * (block_size ?
+						       block_size : 512) / 1024;
+		}
+
+		if (oflag > 0) {
+			int msdig = (ms_per_transaction < 100.0) ? 1 : 0;
+
+			if (Iflag == 0)
+				printf("%4.0Lf%4.0Lf%5.*Lf ",
+				       blocks_per_second,
+				       transfers_per_second,
+				       msdig,
+				       ms_per_transaction);
+			else 
+				printf("%4.1qu%4.1qu%5.*Lf ",
+				       total_blocks,
+				       total_transfers,
+				       msdig,
+				       ms_per_transaction);
+		} else {
+		    if (Bflag)
+			printf(" %3d%% ", (int)(device_busy*100/busy_seconds));
+		    else if (Iflag == 0){
+				printf(" %5.2Lf %3.0Lf %5.2Lf ", 
+				       kb_per_transfer,
+				       transfers_per_second,
+				       mb_per_second);
+
+		    }
+			else {
+				total_mb = total_bytes;
+				total_mb /= 1024 * 1024;
+
+				printf(" %5.2Lf %3.1qu %5.2Lf ", 
+				       kb_per_transfer,
+				       total_transfers,
+				       total_mb);
+			}
+		}
+	}
+	++counttimes;
+}
+
+static void
+cpustats(void)
+{
+	register int state;
+	double time;
+
+	time = 0.0;
+
+	for (state = 0; state < CPUSTATES; ++state)
+		time += cur.cp_time[state];
+	for (state = 0; state < CPUSTATES; ++state)
+		printf("%3.0f",
+		       100. * cur.cp_time[state] / (time ? time : 1));
+}
+#endif // FreeBSD