mem.c

早期freebsd实现

/*
 * Copyright (c) 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 sccsid[] = "@(#)mem.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

#include <sys/param.h>
#include <sys/malloc.h>

#include <errno.h>
#include <kvm.h>
#include <nlist.h>
#include <stdio.h>

#include "extern.h"

static struct nlist nl[] = {
#define	X_KMEMSTATS	0
	{ "_kmemstats" },
#define	X_BUCKET	1
	{ "_bucket" },
	0
};
/*
 * These names are defined in <sys/malloc.h>.
 */
char *kmemnames[] = INITKMEMNAMES;

void
domem()
{
	register struct kmembuckets *kp;
	register struct kmemstats *ks;
	register int i;
	int size;
	long totuse = 0, totfree = 0, totreq = 0;
	struct kmemstats kmemstats[M_LAST];
	struct kmembuckets buckets[MINBUCKET + 16];

	knlist(nl);
	kread(nl[X_BUCKET].n_value, &buckets, sizeof buckets, "kmembucket");
	(void)printf("Memory statistics by bucket size\n");
	(void)printf(
	    "    Size   In Use   Free   Requests  HighWater  Couldfree\n");
	for (i = MINBUCKET, kp = &buckets[i]; i < MINBUCKET + 16; i++, kp++) {
		if (kp->kb_calls == 0)
			continue;
		size = 1 << i;
		(void)printf("%8d %8ld %6ld %10ld %7ld %10ld\n", size, 
			kp->kb_total - kp->kb_totalfree,
			kp->kb_totalfree, kp->kb_calls,
			kp->kb_highwat, kp->kb_couldfree);
		totfree += size * kp->kb_totalfree;
	}

	kread(nl[X_KMEMSTATS].n_value, &kmemstats, sizeof kmemstats,
	    "kmemstats");
	(void)printf("\nMemory statistics by type\n");
	(void)printf(
"       Type  In Use  MemUse   HighUse  Limit Requests  TypeLimit KernLimit\n");
	for (i = 0, ks = &kmemstats[0]; i < M_LAST; i++, ks++) {
		if (ks->ks_calls == 0)
			continue;
		(void)printf("%11s %6ld %7ldK %8ldK %5ldK %8ld %6u %9u\n",
		    kmemnames[i] ? kmemnames[i] : "undefined",
		    ks->ks_inuse, (ks->ks_memuse + 1023) / 1024,
		    (ks->ks_maxused + 1023) / 1024,
		    (ks->ks_limit + 1023) / 1024, ks->ks_calls,
		    ks->ks_limblocks, ks->ks_mapblocks);
		totuse += ks->ks_memuse;
		totreq += ks->ks_calls;
	}
	(void)printf("\nMemory Totals:  In Use    Free    Requests\n");
	(void)printf("              %7ldK %6ldK    %8ld\n",
	     (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
}