param.c revision 1.11
1 /* $NetBSD: param.c,v 1.11 1994/06/29 06:30:52 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1989 Regents of the University of California. 5 * All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)param.c 7.20 (Berkeley) 6/27/91 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/socket.h> 46 #include <sys/proc.h> 47 #include <sys/vnode.h> 48 #include <sys/file.h> 49 #include <sys/callout.h> 50 #include <sys/clist.h> 51 #include <sys/mbuf.h> 52 #include <ufs/ufs/quota.h> 53 #include <sys/kernel.h> 54 #include <sys/utsname.h> 55 #ifdef SYSVSHM 56 #include <machine/vmparam.h> 57 #include <sys/shm.h> 58 #endif 59 #ifdef SYSVSEM 60 #include <sys/sem.h> 61 #endif 62 #ifdef SYSVMSG 63 #include <sys/msg.h> 64 #endif 65 66 /* 67 * System parameter formulae. 68 * 69 * This file is copied into each directory where we compile 70 * the kernel; it should be modified there to suit local taste 71 * if necessary. 72 * 73 * Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx 74 */ 75 76 #ifndef HZ 77 #define HZ 100 78 #endif 79 int hz = HZ; 80 int tick = 1000000 / HZ; 81 int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */ 82 struct timezone tz = { TIMEZONE, DST }; 83 #define NPROC (20 + 16 * MAXUSERS) 84 int maxproc = NPROC; 85 #define NTEXT (80 + NPROC / 8) /* actually the object cache */ 86 #define NVNODE (NPROC + NTEXT + 100) 87 int desiredvnodes = NVNODE; 88 int maxfiles = 3 * (NPROC + MAXUSERS) + 80; 89 int ncallout = 16 + NPROC; 90 int nclist = 60 + 12 * MAXUSERS; 91 int nmbclusters = NMBCLUSTERS; 92 int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ 93 94 /* 95 * Values in support of System V compatible shared memory. XXX 96 */ 97 #ifdef SYSVSHM 98 #define SHMMAX (SHMMAXPGS*NBPG) 99 #define SHMMIN 1 100 #define SHMMNI 32 /* <= SHMMMNI in shm.h */ 101 #define SHMSEG 8 102 #define SHMALL (SHMMAXPGS/CLSIZE) 103 104 struct shminfo shminfo = { 105 SHMMAX, 106 SHMMIN, 107 SHMMNI, 108 SHMSEG, 109 SHMALL 110 }; 111 #endif 112 113 /* 114 * Values in support of System V compatible semaphores. 115 */ 116 117 #ifdef SYSVSEM 118 119 struct seminfo seminfo = { 120 SEMMAP, /* # of entries in semaphore map */ 121 SEMMNI, /* # of semaphore identifiers */ 122 SEMMNS, /* # of semaphores in system */ 123 SEMMNU, /* # of undo structures in system */ 124 SEMMSL, /* max # of semaphores per id */ 125 SEMOPM, /* max # of operations per semop call */ 126 SEMUME, /* max # of undo entries per process */ 127 SEMUSZ, /* size in bytes of undo structure */ 128 SEMVMX, /* semaphore maximum value */ 129 SEMAEM /* adjust on exit max value */ 130 }; 131 #endif 132 133 /* 134 * Values in support of System V compatible messages. 135 */ 136 137 #ifdef SYSVMSG 138 139 struct msginfo msginfo = { 140 MSGMAX, /* max chars in a message */ 141 MSGMNI, /* # of message queue identifiers */ 142 MSGMNB, /* max chars in a queue */ 143 MSGTQL, /* max messages in system */ 144 MSGSSZ, /* size of a message segment */ 145 /* (must be small power of 2 greater than 4) */ 146 MSGSEG /* number of message segments */ 147 }; 148 #endif 149 150 /* 151 * These are initialized at bootstrap time 152 * to values dependent on memory size 153 */ 154 int nbuf, nswbuf; 155 156 /* 157 * These have to be allocated somewhere; allocating 158 * them here forces loader errors if this file is omitted 159 * (if they've been externed everywhere else; hah!). 160 */ 161 struct callout *callout; 162 struct cblock *cfree; 163 struct buf *buf, *swbuf; 164 char *buffers; 165 166 /* 167 * Proc/pgrp hashing. 168 * Here so that hash table sizes can depend on MAXUSERS/NPROC. 169 * Hash size must be a power of two. 170 * NOW omission of this file will cause loader errors! 171 */ 172 173 #if NPROC > 1024 174 #define PIDHSZ 512 175 #else 176 #if NPROC > 512 177 #define PIDHSZ 256 178 #else 179 #if NPROC > 256 180 #define PIDHSZ 128 181 #else 182 #define PIDHSZ 64 183 #endif 184 #endif 185 #endif 186 187 struct proc *pidhash[PIDHSZ]; 188 struct pgrp *pgrphash[PIDHSZ]; 189 int pidhashmask = PIDHSZ - 1; 190 191 struct utsname utsname; 192
Indexes created Tue Sep 23 07:09:52 GMT 2025