param.c revision 1.16
1 /* $NetBSD: param.c,v 1.16 1996/03/12 03:08:40 mrg 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 #ifdef REAL_CLISTS 51 #include <sys/clist.h> 52 #endif 53 #include <sys/mbuf.h> 54 #include <ufs/ufs/quota.h> 55 #include <sys/kernel.h> 56 #include <sys/utsname.h> 57 #ifdef SYSVSHM 58 #include <machine/vmparam.h> 59 #include <sys/shm.h> 60 #endif 61 #ifdef SYSVSEM 62 #include <sys/sem.h> 63 #endif 64 #ifdef SYSVMSG 65 #include <sys/msg.h> 66 #endif 67 68 /* 69 * System parameter formulae. 70 * 71 * This file is copied into each directory where we compile 72 * the kernel; it should be modified there to suit local taste 73 * if necessary. 74 * 75 * Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx 76 */ 77 78 #ifndef TIMEZONE 79 # define TIMEZONE 0 80 #endif 81 #ifndef DST 82 # define DST 0 83 #endif 84 #ifndef HZ 85 #define HZ 100 86 #endif 87 int hz = HZ; 88 int tick = 1000000 / HZ; 89 int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */ 90 struct timezone tz = { TIMEZONE, DST }; 91 #define NPROC (20 + 16 * MAXUSERS) 92 int maxproc = NPROC; 93 #define NTEXT (80 + NPROC / 8) /* actually the object cache */ 94 #define NVNODE (NPROC + NTEXT + 100) 95 int desiredvnodes = NVNODE; 96 int maxfiles = 3 * (NPROC + MAXUSERS) + 80; 97 int ncallout = 16 + NPROC; 98 #ifdef REAL_CLISTS 99 int nclist = 60 + 12 * MAXUSERS; 100 #endif 101 int nmbclusters = NMBCLUSTERS; 102 int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ 103 104 /* 105 * Values in support of System V compatible shared memory. XXX 106 */ 107 #ifdef SYSVSHM 108 #define SHMMAX SHMMAXPGS /* shminit() performs a `*= NBPG' */ 109 #define SHMMIN 1 110 #define SHMMNI 32 /* <= SHMMMNI in shm.h */ 111 #define SHMSEG 8 112 #define SHMALL (SHMMAXPGS/CLSIZE) 113 114 struct shminfo shminfo = { 115 SHMMAX, 116 SHMMIN, 117 SHMMNI, 118 SHMSEG, 119 SHMALL 120 }; 121 #endif 122 123 /* 124 * Values in support of System V compatible semaphores. 125 */ 126 #ifdef SYSVSEM 127 struct seminfo seminfo = { 128 SEMMAP, /* # of entries in semaphore map */ 129 SEMMNI, /* # of semaphore identifiers */ 130 SEMMNS, /* # of semaphores in system */ 131 SEMMNU, /* # of undo structures in system */ 132 SEMMSL, /* max # of semaphores per id */ 133 SEMOPM, /* max # of operations per semop call */ 134 SEMUME, /* max # of undo entries per process */ 135 SEMUSZ, /* size in bytes of undo structure */ 136 SEMVMX, /* semaphore maximum value */ 137 SEMAEM /* adjust on exit max value */ 138 }; 139 #endif 140 141 /* 142 * Values in support of System V compatible messages. 143 */ 144 #ifdef SYSVMSG 145 struct msginfo msginfo = { 146 MSGMAX, /* max chars in a message */ 147 MSGMNI, /* # of message queue identifiers */ 148 MSGMNB, /* max chars in a queue */ 149 MSGTQL, /* max messages in system */ 150 MSGSSZ, /* size of a message segment */ 151 /* (must be small power of 2 greater than 4) */ 152 MSGSEG /* number of message segments */ 153 }; 154 #endif 155 156 /* 157 * These are initialized at bootstrap time 158 * to values dependent on memory size 159 */ 160 int nbuf, nswbuf; 161 162 /* 163 * These have to be allocated somewhere; allocating 164 * them here forces loader errors if this file is omitted 165 * (if they've been externed everywhere else; hah!). 166 */ 167 struct callout *callout; 168 struct cblock *cfree; 169 struct buf *buf, *swbuf; 170 char *buffers; 171 172 struct utsname utsname; 173
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