1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * University Copyright- Copyright (c) 1982, 1986, 1988 31 * The Regents of the University of California 32 * All Rights Reserved 33 * 34 * University Acknowledgment- Portions of this document are derived from 35 * software developed by the University of California, Berkeley, and its 36 * contributors. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/t_lock.h> 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/mman.h> 44 #include <sys/sysmacros.h> 45 #include <sys/errno.h> 46 #include <sys/signal.h> 47 #include <sys/user.h> 48 #include <sys/proc.h> 49 #include <sys/cmn_err.h> 50 #include <sys/debug.h> 51 52 #include <vm/hat.h> 53 #include <vm/as.h> 54 #include <vm/seg_vn.h> 55 #include <vm/rm.h> 56 #include <vm/seg.h> 57 #include <vm/page.h> 58 59 /* 60 * Yield the memory claim requirement for an address space. 61 * 62 * This is currently implemented as the number of active hardware 63 * translations that have page structures. Therefore, it can 64 * underestimate the traditional resident set size, eg, if the 65 * physical page is present and the hardware translation is missing; 66 * and it can overestimate the rss, eg, if there are active 67 * translations to a frame buffer with page structs. 68 * Also, it does not take sharing and XHATs into account. 69 */ 70 size_t 71 rm_asrss(as) 72 register struct as *as; 73 { 74 if (as != (struct as *)NULL && as != &kas) 75 return ((size_t)btop(hat_get_mapped_size(as->a_hat))); 76 else 77 return (0); 78 } 79 80 /* 81 * Return a 16-bit binary fraction representing the percent of total memory 82 * used by this address space. Binary point is to right of high-order bit. 83 * Defined as the ratio of a_rss for the process to total physical memory. 84 * This assumes 2s-complement arithmetic and that shorts and longs are 85 * 16 bits and 32 bits, respectively. 86 */ 87 ushort_t 88 rm_pctmemory(struct as *as) 89 { 90 /* This can't overflow */ 91 ulong_t num = (ulong_t)rm_asrss(as) << (PAGESHIFT-1); 92 int shift = 16 - PAGESHIFT; 93 ulong_t total = total_pages; 94 95 if (shift < 0) { 96 num >>= (-shift); 97 shift = 0; 98 } 99 while (shift > 0 && (num & 0x80000000) == 0) { 100 shift--; 101 num <<= 1; 102 } 103 if (shift > 0) 104 total >>= shift; 105 106 return (num / total); 107 } 108