17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5da6c28aaSamw * Common Development and Distribution License (the "License").
6da6c28aaSamw * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
217c478bd9Sstevel@tonic-gate /*
2240688216SSudheer A * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
237c478bd9Sstevel@tonic-gate * Use is subject to license terms.
247c478bd9Sstevel@tonic-gate */
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
277c478bd9Sstevel@tonic-gate /* All Rights Reserved */
287c478bd9Sstevel@tonic-gate
297c478bd9Sstevel@tonic-gate /*
307c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988
317c478bd9Sstevel@tonic-gate * The Regents of the University of California
327c478bd9Sstevel@tonic-gate * All Rights Reserved
337c478bd9Sstevel@tonic-gate *
347c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from
357c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its
367c478bd9Sstevel@tonic-gate * contributors.
377c478bd9Sstevel@tonic-gate */
387c478bd9Sstevel@tonic-gate
397c478bd9Sstevel@tonic-gate #include <sys/types.h>
407c478bd9Sstevel@tonic-gate #include <sys/t_lock.h>
417c478bd9Sstevel@tonic-gate #include <sys/param.h>
427c478bd9Sstevel@tonic-gate #include <sys/systm.h>
437c478bd9Sstevel@tonic-gate #include <sys/mman.h>
447c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h>
457c478bd9Sstevel@tonic-gate #include <sys/errno.h>
467c478bd9Sstevel@tonic-gate #include <sys/signal.h>
477c478bd9Sstevel@tonic-gate #include <sys/user.h>
487c478bd9Sstevel@tonic-gate #include <sys/proc.h>
497c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h>
507c478bd9Sstevel@tonic-gate #include <sys/debug.h>
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate #include <vm/hat.h>
537c478bd9Sstevel@tonic-gate #include <vm/as.h>
547c478bd9Sstevel@tonic-gate #include <vm/seg_vn.h>
557c478bd9Sstevel@tonic-gate #include <vm/rm.h>
567c478bd9Sstevel@tonic-gate #include <vm/seg.h>
577c478bd9Sstevel@tonic-gate #include <vm/page.h>
587c478bd9Sstevel@tonic-gate
597c478bd9Sstevel@tonic-gate /*
607c478bd9Sstevel@tonic-gate * Yield the memory claim requirement for an address space.
617c478bd9Sstevel@tonic-gate *
627c478bd9Sstevel@tonic-gate * This is currently implemented as the number of active hardware
637c478bd9Sstevel@tonic-gate * translations that have page structures. Therefore, it can
647c478bd9Sstevel@tonic-gate * underestimate the traditional resident set size, eg, if the
657c478bd9Sstevel@tonic-gate * physical page is present and the hardware translation is missing;
667c478bd9Sstevel@tonic-gate * and it can overestimate the rss, eg, if there are active
677c478bd9Sstevel@tonic-gate * translations to a frame buffer with page structs.
68*0d5ae8c1SJosef 'Jeff' Sipek * Also, it does not take sharing into account.
697c478bd9Sstevel@tonic-gate */
707c478bd9Sstevel@tonic-gate size_t
rm_asrss(as)717c478bd9Sstevel@tonic-gate rm_asrss(as)
727c478bd9Sstevel@tonic-gate register struct as *as;
737c478bd9Sstevel@tonic-gate {
747c478bd9Sstevel@tonic-gate if (as != (struct as *)NULL && as != &kas)
757c478bd9Sstevel@tonic-gate return ((size_t)btop(hat_get_mapped_size(as->a_hat)));
767c478bd9Sstevel@tonic-gate else
777c478bd9Sstevel@tonic-gate return (0);
787c478bd9Sstevel@tonic-gate }
797c478bd9Sstevel@tonic-gate
807c478bd9Sstevel@tonic-gate /*
817c478bd9Sstevel@tonic-gate * Return a 16-bit binary fraction representing the percent of total memory
827c478bd9Sstevel@tonic-gate * used by this address space. Binary point is to right of high-order bit.
837c478bd9Sstevel@tonic-gate * Defined as the ratio of a_rss for the process to total physical memory.
847c478bd9Sstevel@tonic-gate * This assumes 2s-complement arithmetic and that shorts and longs are
857c478bd9Sstevel@tonic-gate * 16 bits and 32 bits, respectively.
867c478bd9Sstevel@tonic-gate */
877c478bd9Sstevel@tonic-gate ushort_t
rm_pctmemory(struct as * as)887c478bd9Sstevel@tonic-gate rm_pctmemory(struct as *as)
897c478bd9Sstevel@tonic-gate {
907c478bd9Sstevel@tonic-gate /* This can't overflow */
917c478bd9Sstevel@tonic-gate ulong_t num = (ulong_t)rm_asrss(as) << (PAGESHIFT-1);
927c478bd9Sstevel@tonic-gate int shift = 16 - PAGESHIFT;
937c478bd9Sstevel@tonic-gate ulong_t total = total_pages;
947c478bd9Sstevel@tonic-gate
957c478bd9Sstevel@tonic-gate if (shift < 0) {
967c478bd9Sstevel@tonic-gate num >>= (-shift);
977c478bd9Sstevel@tonic-gate shift = 0;
987c478bd9Sstevel@tonic-gate }
997c478bd9Sstevel@tonic-gate while (shift > 0 && (num & 0x80000000) == 0) {
1007c478bd9Sstevel@tonic-gate shift--;
1017c478bd9Sstevel@tonic-gate num <<= 1;
1027c478bd9Sstevel@tonic-gate }
1037c478bd9Sstevel@tonic-gate if (shift > 0)
1047c478bd9Sstevel@tonic-gate total >>= shift;
1057c478bd9Sstevel@tonic-gate
1067c478bd9Sstevel@tonic-gate return (num / total);
1077c478bd9Sstevel@tonic-gate }
108