vmstat.c

早期freebsd实现

/*
 * Copyright (c) 1980, 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.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1986, 1991, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)vmstat.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/dkstat.h>
#include <sys/buf.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/signal.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <time.h>
#include <nlist.h>
#include <kvm.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include <limits.h>

#define NEWVM			/* XXX till old has been updated or purged */
struct nlist namelist[] = {
#define	X_CPTIME	0
	{ "_cp_time" },
#define	X_DK_NDRIVE	1
	{ "_dk_ndrive" },
#define X_SUM		2
	{ "_cnt" },
#define	X_BOOTTIME	3
	{ "_boottime" },
#define	X_DKXFER	4
	{ "_dk_xfer" },
#define X_HZ		5
	{ "_hz" },
#define X_STATHZ	6
	{ "_stathz" },
#define X_NCHSTATS	7
	{ "_nchstats" },
#define	X_INTRNAMES	8
	{ "_intrnames" },
#define	X_EINTRNAMES	9
	{ "_eintrnames" },
#define	X_INTRCNT	10
	{ "_intrcnt" },
#define	X_EINTRCNT	11
	{ "_eintrcnt" },
#define	X_KMEMSTAT	12
	{ "_kmemstats" },
#define	X_KMEMBUCKETS	13
	{ "_bucket" },
#ifdef notdef
#define	X_DEFICIT	14
	{ "_deficit" },
#define	X_FORKSTAT	15
	{ "_forkstat" },
#define X_REC		16
	{ "_rectime" },
#define X_PGIN		17
	{ "_pgintime" },
#define	X_XSTATS	18
	{ "_xstats" },
#define X_END		18
#else
#define X_END		14
#endif
#if defined(hp300) || defined(luna68k)
#define	X_HPDINIT	(X_END)
	{ "_hp_dinit" },
#endif
#ifdef mips
#define	X_SCSI_DINIT	(X_END)
	{ "_scsi_dinit" },
#endif
#ifdef tahoe
#define	X_VBDINIT	(X_END)
	{ "_vbdinit" },
#define	X_CKEYSTATS	(X_END+1)
	{ "_ckeystats" },
#define	X_DKEYSTATS	(X_END+2)
	{ "_dkeystats" },
#endif
#ifdef vax
#define X_MBDINIT	(X_END)
	{ "_mbdinit" },
#define X_UBDINIT	(X_END+1)
	{ "_ubdinit" },
#endif
	{ "" },
};

struct _disk {
	long time[CPUSTATES];
	long *xfer;
} cur, last;

struct	vmmeter sum, osum;
char	**dr_name;
int	*dr_select, dk_ndrive, ndrives;

int	winlines = 20;

kvm_t *kd;

#define	FORKSTAT	0x01
#define	INTRSTAT	0x02
#define	MEMSTAT		0x04
#define	SUMSTAT		0x08
#define	TIMESTAT	0x10
#define	VMSTAT		0x20

#include "names.c"			/* disk names -- machine dependent */

void	cpustats(), dkstats(), dointr(), domem(), dosum();
void	dovmstat(), kread(), usage();
#ifdef notdef
void	dotimes(), doforkst();
#endif

main(argc, argv)
	register int argc;
	register char **argv;
{
	extern int optind;
	extern char *optarg;
	register int c, todo;
	u_int interval;
	int reps;
	char *memf, *nlistf;
        char errbuf[_POSIX2_LINE_MAX];

	memf = nlistf = NULL;
	interval = reps = todo = 0;
	while ((c = getopt(argc, argv, "c:fiM:mN:stw:")) != EOF) {
		switch (c) {
		case 'c':
			reps = atoi(optarg);
			break;
#ifndef notdef
		case 'f':
			todo |= FORKSTAT;
			break;
#endif
		case 'i':
			todo |= INTRSTAT;
			break;
		case 'M':
			memf = optarg;
			break;
		case 'm':
			todo |= MEMSTAT;
			break;
		case 'N':
			nlistf = optarg;
			break;
		case 's':
			todo |= SUMSTAT;
			break;
#ifndef notdef
		case 't':
			todo |= TIMESTAT;
			break;
#endif
		case 'w':
			interval = atoi(optarg);
			break;
		case '?':
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (todo == 0)
		todo = VMSTAT;

	/*
	 * 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());

        kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
	if (kd == 0) {
		(void)fprintf(stderr,
		    "vmstat: kvm_openfiles: %s\n", errbuf);
		exit(1);
	}

	if ((c = kvm_nlist(kd, namelist)) != 0) {
		if (c > 0) {
			(void)fprintf(stderr,
			    "vmstat: undefined symbols:");
			for (c = 0;
			    c < sizeof(namelist)/sizeof(namelist[0]); c++)
				if (namelist[c].n_type == 0)
					fprintf(stderr, " %s",
					    namelist[c].n_name);
			(void)fputc('\n', stderr);
		} else
			(void)fprintf(stderr, "vmstat: kvm_nlist: %s\n",
			    kvm_geterr(kd));
		exit(1);
	}

	if (todo & VMSTAT) {
		char **getdrivedata();
		struct winsize winsize;

		argv = getdrivedata(argv);
		winsize.ws_row = 0;
		(void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
		if (winsize.ws_row > 0)
			winlines = winsize.ws_row;

	}

#define	BACKWARD_COMPATIBILITY
#ifdef	BACKWARD_COMPATIBILITY
	if (*argv) {
		interval = atoi(*argv);
		if (*++argv)
			reps = atoi(*argv);
	}
#endif

	if (interval) {
		if (!reps)
			reps = -1;
	} else if (reps)
		interval = 1;

#ifdef notdef
	if (todo & FORKSTAT)
		doforkst();
#endif
	if (todo & MEMSTAT)
		domem();
	if (todo & SUMSTAT)
		dosum();
#ifdef notdef
	if (todo & TIMESTAT)
		dotimes();
#endif
	if (todo & INTRSTAT)
		dointr();
	if (todo & VMSTAT)
		dovmstat(interval, reps);
	exit(0);
}

char **
getdrivedata(argv)
	char **argv;
{
	register int i;
	register char **cp;
	char buf[30];

	kread(X_DK_NDRIVE, &dk_ndrive, sizeof(dk_ndrive));
	if (dk_ndrive <= 0) {
		(void)fprintf(stderr, "vmstat: dk_ndrive %d\n", dk_ndrive);
		exit(1);
	}
	dr_select = calloc((size_t)dk_ndrive, sizeof(int));
	dr_name = calloc((size_t)dk_ndrive, sizeof(char *));
	for (i = 0; i < dk_ndrive; i++)
		dr_name[i] = NULL;
	cur.xfer = calloc((size_t)dk_ndrive, sizeof(long));
	last.xfer = calloc((size_t)dk_ndrive, sizeof(long));
	if (!read_names())
		exit (1);
	for (i = 0; i < dk_ndrive; i++)
		if (dr_name[i] == NULL) {
			(void)sprintf(buf, "??%d", i);
			dr_name[i] = strdup(buf);
		}

	/*
	 * Choose drives to be displayed.  Priority goes to (in order) drives
	 * supplied as arguments, default drives.  If everything isn't filled
	 * in and there are drives not taken care of, display the first few
	 * that fit.
	 */
#define BACKWARD_COMPATIBILITY
	for (ndrives = 0; *argv; ++argv) {
#ifdef	BACKWARD_COMPATIBILITY
		if (isdigit(**argv))
			break;
#endif
		for (i = 0; i < dk_ndrive; i++) {
			if (strcmp(dr_name[i], *argv))
				continue;
			dr_select[i] = 1;
			++ndrives;
			break;
		}
	}
	for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
		if (dr_select[i])
			continue;
		for (cp = defdrives; *cp; cp++)
			if (strcmp(dr_name[i], *cp) == 0) {
				dr_select[i] = 1;
				++ndrives;
				break;
			}
	}
	for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
		if (dr_select[i])
			continue;
		dr_select[i] = 1;
		++ndrives;
	}
	return(argv);
}

long
getuptime()
{
	static time_t now, boottime;
	time_t uptime;

	if (boottime == 0)
		kread(X_BOOTTIME, &boottime, sizeof(boottime));
	(void)time(&now);
	uptime = now - boottime;
	if (uptime <= 0 || uptime > 60*60*24*365*10) {
		(void)fprintf(stderr,
		    "vmstat: time makes no sense; namelist must be wrong.\n");
		exit(1);
	}
	return(uptime);
}

int	hz, hdrcnt;

void
dovmstat(interval, reps)
	u_int interval;
	int reps;
{
	struct vmtotal total;
	time_t uptime, halfuptime;
	void needhdr();
	int mib[2], size;

	uptime = getuptime();
	halfuptime = uptime / 2;
	(void)signal(SIGCONT, needhdr);

	if (namelist[X_STATHZ].n_type != 0 && namelist[X_STATHZ].n_value != 0)
		kread(X_STATHZ, &hz, sizeof(hz));
	if (!hz)
		kread(X_HZ, &hz, sizeof(hz));

	for (hdrcnt = 1;;) {
		if (!--hdrcnt)
			printhdr();
		kread(X_CPTIME, cur.time, sizeof(cur.time));
		kread(X_DKXFER, cur.xfer, sizeof(*cur.xfer) * dk_ndrive);
		kread(X_SUM, &sum, sizeof(sum));
		size = sizeof(total);
		mib[0] = CTL_VM;
		mib[1] = VM_METER;
		if (sysctl(mib, 2, &total, &size, NULL, 0) < 0) {
			printf("Can't get kerninfo: %s\n", strerror(errno));
			bzero(&total, sizeof(total));
		}
		(void)printf("%2d%2d%2d",
		    total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
#define pgtok(a) ((a) * sum.v_page_size >> 10)
#define	rate(x)	(((x) + halfuptime) / uptime)	/* round */
		(void)printf("%6ld%6ld ",
		    pgtok(total.t_avm), pgtok(total.t_free));
#ifdef NEWVM
		(void)printf("%4lu ", rate(sum.v_faults - osum.v_faults));
		(void)printf("%3lu ",
		    rate(sum.v_reactivated - osum.v_reactivated));
		(void)printf("%3lu ", rate(sum.v_pageins - osum.v_pageins));
		(void)printf("%3lu %3lu ",
		    rate(sum.v_pageouts - osum.v_pageouts), 0);
#else
		(void)printf("%3lu %2lu ",
		    rate(sum.v_pgrec - (sum.v_xsfrec+sum.v_xifrec) -
		    (osum.v_pgrec - (osum.v_xsfrec+osum.v_xifrec))),
		    rate(sum.v_xsfrec + sum.v_xifrec -
		    osum.v_xsfrec - osum.v_xifrec));