param.c revision 1.22
1 /* $NetBSD: param.c,v 1.22 1997/09/20 00:44:06 enami 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 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/socket.h> 48 #include <sys/proc.h> 49 #include <sys/vnode.h> 50 #include <sys/file.h> 51 #include <sys/callout.h> 52 #ifdef REAL_CLISTS 53 #include <sys/clist.h> 54 #endif 55 #include <sys/mbuf.h> 56 #include <ufs/ufs/quota.h> 57 #include <sys/kernel.h> 58 #include <sys/utsname.h> 59 #ifdef SYSVSHM 60 #include <machine/vmparam.h> 61 #include <sys/shm.h> 62 #endif 63 #ifdef SYSVSEM 64 #include <sys/sem.h> 65 #endif 66 #ifdef SYSVMSG 67 #include <sys/msg.h> 68 #endif 69 70 /* 71 * System parameter formulae. 72 * 73 * This file is copied into each directory where we compile 74 * the kernel; it should be modified there to suit local taste 75 * if necessary. 76 * 77 * Compiled with -DHZ=xx -DRTC_OFFSET=x -DMAXUSERS=xx 78 */ 79 80 #ifdef TIMEZONE 81 #error TIMEZONE is an obsolete kernel option. 82 #endif 83 #ifdef DST 84 #error DST is an obsolete kernel option. 85 #endif 86 #ifndef RTC_OFFSET 87 #define RTC_OFFSET 0 88 #endif 89 #ifndef HZ 90 #define HZ 100 91 #endif 92 int hz = HZ; 93 int tick = 1000000 / HZ; 94 int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */ 95 int rtc_offset = RTC_OFFSET; 96 #ifndef NPROC 97 #define NPROC (20 + 16 * MAXUSERS) 98 #endif 99 int maxproc = NPROC; 100 #ifndef NTEXT 101 #define NTEXT (80 + NPROC / 8) /* actually the object cache */ 102 #endif 103 #ifndef NVNODE 104 #define NVNODE (NPROC + NTEXT + 100) 105 #endif 106 int desiredvnodes = NVNODE; 107 int maxfiles = 3 * (NPROC + MAXUSERS) + 80; 108 int ncallout = 16 + NPROC; 109 #ifdef REAL_CLISTS 110 int nclist = 60 + 12 * MAXUSERS; 111 #endif 112 int nmbclusters = NMBCLUSTERS; 113 int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ 114 115 /* 116 * Values in support of System V compatible shared memory. XXX 117 */ 118 #ifdef SYSVSHM 119 #define SHMMAX SHMMAXPGS /* shminit() performs a `*= NBPG' */ 120 #define SHMMIN 1 121 #define SHMMNI 32 /* <= SHMMMNI in shm.h */ 122 #define SHMSEG 8 123 #define SHMALL (SHMMAXPGS/CLSIZE) 124 125 struct shminfo shminfo = { 126 SHMMAX, 127 SHMMIN, 128 SHMMNI, 129 SHMSEG, 130 SHMALL 131 }; 132 #endif 133 134 /* 135 * Values in support of System V compatible semaphores. 136 */ 137 #ifdef SYSVSEM 138 struct seminfo seminfo = { 139 SEMMAP, /* # of entries in semaphore map */ 140 SEMMNI, /* # of semaphore identifiers */ 141 SEMMNS, /* # of semaphores in system */ 142 SEMMNU, /* # of undo structures in system */ 143 SEMMSL, /* max # of semaphores per id */ 144 SEMOPM, /* max # of operations per semop call */ 145 SEMUME, /* max # of undo entries per process */ 146 SEMUSZ, /* size in bytes of undo structure */ 147 SEMVMX, /* semaphore maximum value */ 148 SEMAEM /* adjust on exit max value */ 149 }; 150 #endif 151 152 /* 153 * Values in support of System V compatible messages. 154 */ 155 #ifdef SYSVMSG 156 struct msginfo msginfo = { 157 MSGMAX, /* max chars in a message */ 158 MSGMNI, /* # of message queue identifiers */ 159 MSGMNB, /* max chars in a queue */ 160 MSGTQL, /* max messages in system */ 161 MSGSSZ, /* size of a message segment */ 162 /* (must be small power of 2 greater than 4) */ 163 MSGSEG /* number of message segments */ 164 }; 165 #endif 166 167 /* 168 * These are initialized at bootstrap time 169 * to values dependent on memory size 170 */ 171 int nbuf, nswbuf; 172 173 /* 174 * These have to be allocated somewhere; allocating 175 * them here forces loader errors if this file is omitted 176 * (if they've been externed everywhere else; hah!). 177 */ 178 struct callout *callout; 179 struct cblock *cfree; 180 struct buf *buf, *swbuf; 181 char *buffers; 182 183 struct utsname utsname; 184 185 /* 186 * These control when and to what priority a process gets after a certain 187 * amount of CPU time expires. AUTONICETIME is in seconds. 188 * AUTONICEVAL is NOT offset by NZERO, i.e. it's between PRIO_MIN and PRIO_MAX. 189 */ 190 #ifdef AUTONICETIME 191 int autonicetime = AUTONICETIME; 192 #else 193 int autonicetime = (60 * 10); /* 10 minutes */ 194 #endif 195 196 #ifdef AUTONICEVAL 197 int autoniceval = AUTONICEVAL; 198 #else 199 int autoniceval = 4; /* default + 4 */ 200 #endif 201 202 /* 203 * Actual network mbuf sizes (read-only), for netstat. 204 */ 205 int msize = MSIZE; 206 int mclbytes = MCLBYTES; 207
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