param.c revision 1.24
1 /* $NetBSD: param.c,v 1.24 1998/10/19 22:16:22 tron 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 "opt_rtc_offset.h" 44 #include "opt_sysv.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/socket.h> 49 #include <sys/proc.h> 50 #include <sys/vnode.h> 51 #include <sys/file.h> 52 #include <sys/callout.h> 53 #ifdef REAL_CLISTS 54 #include <sys/clist.h> 55 #endif 56 #include <sys/mbuf.h> 57 #include <ufs/ufs/quota.h> 58 #include <sys/kernel.h> 59 #include <sys/utsname.h> 60 #ifdef SYSVSHM 61 #include <machine/vmparam.h> 62 #include <sys/shm.h> 63 #endif 64 #ifdef SYSVSEM 65 #include <sys/sem.h> 66 #endif 67 #ifdef SYSVMSG 68 #include <sys/msg.h> 69 #endif 70 71 /* 72 * System parameter formulae. 73 * 74 * This file is copied into each directory where we compile 75 * the kernel; it should be modified there to suit local taste 76 * if necessary. 77 * 78 * Compiled with -DHZ=xx -DRTC_OFFSET=x -DMAXUSERS=xx 79 */ 80 81 #ifdef TIMEZONE 82 #error TIMEZONE is an obsolete kernel option. 83 #endif 84 #ifdef DST 85 #error DST is an obsolete kernel option. 86 #endif 87 #ifndef RTC_OFFSET 88 #define RTC_OFFSET 0 89 #endif 90 #ifndef HZ 91 #define HZ 100 92 #endif 93 int hz = HZ; 94 int tick = 1000000 / HZ; 95 int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */ 96 int rtc_offset = RTC_OFFSET; 97 #ifndef NPROC 98 #define NPROC (20 + 16 * MAXUSERS) 99 #endif 100 int maxproc = NPROC; 101 #ifndef NTEXT 102 #define NTEXT (80 + NPROC / 8) /* actually the object cache */ 103 #endif 104 #ifndef NVNODE 105 #define NVNODE (NPROC + NTEXT + 100) 106 #endif 107 int desiredvnodes = NVNODE; 108 int maxfiles = 3 * (NPROC + MAXUSERS) + 80; 109 int ncallout = 16 + NPROC; 110 #ifdef REAL_CLISTS 111 int nclist = 60 + 12 * MAXUSERS; 112 #endif 113 int nmbclusters = NMBCLUSTERS; 114 int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ 115 116 /* 117 * Values in support of System V compatible shared memory. XXX 118 */ 119 #ifdef SYSVSHM 120 #define SHMMAX SHMMAXPGS /* shminit() performs a `*= NBPG' */ 121 #define SHMMIN 1 122 #define SHMMNI 128 /* <= SHMMMNI in shm.h */ 123 #define SHMSEG 32 124 #define SHMALL (SHMMAXPGS/CLSIZE) 125 126 struct shminfo shminfo = { 127 SHMMAX, 128 SHMMIN, 129 SHMMNI, 130 SHMSEG, 131 SHMALL 132 }; 133 #endif 134 135 /* 136 * Values in support of System V compatible semaphores. 137 */ 138 #ifdef SYSVSEM 139 struct seminfo seminfo = { 140 SEMMAP, /* # of entries in semaphore map */ 141 SEMMNI, /* # of semaphore identifiers */ 142 SEMMNS, /* # of semaphores in system */ 143 SEMMNU, /* # of undo structures in system */ 144 SEMMSL, /* max # of semaphores per id */ 145 SEMOPM, /* max # of operations per semop call */ 146 SEMUME, /* max # of undo entries per process */ 147 SEMUSZ, /* size in bytes of undo structure */ 148 SEMVMX, /* semaphore maximum value */ 149 SEMAEM /* adjust on exit max value */ 150 }; 151 #endif 152 153 /* 154 * Values in support of System V compatible messages. 155 */ 156 #ifdef SYSVMSG 157 struct msginfo msginfo = { 158 MSGMAX, /* max chars in a message */ 159 MSGMNI, /* # of message queue identifiers */ 160 MSGMNB, /* max chars in a queue */ 161 MSGTQL, /* max messages in system */ 162 MSGSSZ, /* size of a message segment */ 163 /* (must be small power of 2 greater than 4) */ 164 MSGSEG /* number of message segments */ 165 }; 166 #endif 167 168 /* 169 * These are initialized at bootstrap time 170 * to values dependent on memory size 171 */ 172 int nbuf, nswbuf; 173 174 /* 175 * These have to be allocated somewhere; allocating 176 * them here forces loader errors if this file is omitted 177 * (if they've been externed everywhere else; hah!). 178 */ 179 struct callout *callout; 180 struct cblock *cfree; 181 struct buf *buf, *swbuf; 182 char *buffers; 183 184 struct utsname utsname; 185 186 /* 187 * These control when and to what priority a process gets after a certain 188 * amount of CPU time expires. AUTONICETIME is in seconds. 189 * AUTONICEVAL is NOT offset by NZERO, i.e. it's between PRIO_MIN and PRIO_MAX. 190 */ 191 #ifdef AUTONICETIME 192 int autonicetime = AUTONICETIME; 193 #else 194 int autonicetime = (60 * 10); /* 10 minutes */ 195 #endif 196 197 #ifdef AUTONICEVAL 198 int autoniceval = AUTONICEVAL; 199 #else 200 int autoniceval = 4; /* default + 4 */ 201 #endif 202 203 /* 204 * Actual network mbuf sizes (read-only), for netstat. 205 */ 206 int msize = MSIZE; 207 int mclbytes = MCLBYTES; 208
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