param.c revision 1.26
1 /* $NetBSD: param.c,v 1.26 1999/04/22 04:50:05 simonb 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_sb_max.h" 45 #include "opt_sysv.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/proc.h> 52 #include <sys/vnode.h> 53 #include <sys/file.h> 54 #include <sys/callout.h> 55 #ifdef REAL_CLISTS 56 #include <sys/clist.h> 57 #endif 58 #include <sys/mbuf.h> 59 #include <ufs/ufs/quota.h> 60 #include <sys/kernel.h> 61 #include <sys/utsname.h> 62 #ifdef SYSVSHM 63 #include <machine/vmparam.h> 64 #include <sys/shm.h> 65 #endif 66 #ifdef SYSVSEM 67 #include <sys/sem.h> 68 #endif 69 #ifdef SYSVMSG 70 #include <sys/msg.h> 71 #endif 72 73 /* 74 * System parameter formulae. 75 * 76 * This file is copied into each directory where we compile 77 * the kernel; it should be modified there to suit local taste 78 * if necessary. 79 * 80 * Compiled with -DHZ=xx -DRTC_OFFSET=x -DMAXUSERS=xx 81 */ 82 83 #ifdef TIMEZONE 84 #error TIMEZONE is an obsolete kernel option. 85 #endif 86 #ifdef DST 87 #error DST is an obsolete kernel option. 88 #endif 89 #ifndef RTC_OFFSET 90 #define RTC_OFFSET 0 91 #endif 92 #ifndef HZ 93 #define HZ 100 94 #endif 95 int hz = HZ; 96 int tick = 1000000 / HZ; 97 int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */ 98 int rtc_offset = RTC_OFFSET; 99 int maxproc = NPROC; 100 int desiredvnodes = NVNODE; 101 int maxfiles = 3 * (NPROC + MAXUSERS) + 80; 102 int ncallout = 16 + NPROC; 103 #ifdef REAL_CLISTS 104 int nclist = 60 + 12 * MAXUSERS; 105 #endif 106 int nmbclusters = NMBCLUSTERS; 107 u_long sb_max = SB_MAX; /* maximum socket buffer size */ 108 int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ 109 110 /* 111 * Values in support of System V compatible shared memory. XXX 112 */ 113 #ifdef SYSVSHM 114 #define SHMMAX SHMMAXPGS /* shminit() performs a `*= NBPG' */ 115 #define SHMMIN 1 116 #define SHMMNI 128 /* <= SHMMMNI in shm.h */ 117 #define SHMSEG 32 118 #define SHMALL (SHMMAXPGS/CLSIZE) 119 120 struct shminfo shminfo = { 121 SHMMAX, 122 SHMMIN, 123 SHMMNI, 124 SHMSEG, 125 SHMALL 126 }; 127 #endif 128 129 /* 130 * Values in support of System V compatible semaphores. 131 */ 132 #ifdef SYSVSEM 133 struct seminfo seminfo = { 134 SEMMAP, /* # of entries in semaphore map */ 135 SEMMNI, /* # of semaphore identifiers */ 136 SEMMNS, /* # of semaphores in system */ 137 SEMMNU, /* # of undo structures in system */ 138 SEMMSL, /* max # of semaphores per id */ 139 SEMOPM, /* max # of operations per semop call */ 140 SEMUME, /* max # of undo entries per process */ 141 SEMUSZ, /* size in bytes of undo structure */ 142 SEMVMX, /* semaphore maximum value */ 143 SEMAEM /* adjust on exit max value */ 144 }; 145 #endif 146 147 /* 148 * Values in support of System V compatible messages. 149 */ 150 #ifdef SYSVMSG 151 struct msginfo msginfo = { 152 MSGMAX, /* max chars in a message */ 153 MSGMNI, /* # of message queue identifiers */ 154 MSGMNB, /* max chars in a queue */ 155 MSGTQL, /* max messages in system */ 156 MSGSSZ, /* size of a message segment */ 157 /* (must be small power of 2 greater than 4) */ 158 MSGSEG /* number of message segments */ 159 }; 160 #endif 161 162 /* 163 * These are initialized at bootstrap time 164 * to values dependent on memory size 165 */ 166 int nbuf, nswbuf; 167 168 /* 169 * These have to be allocated somewhere; allocating 170 * them here forces loader errors if this file is omitted 171 * (if they've been externed everywhere else; hah!). 172 */ 173 struct callout *callout; 174 struct cblock *cfree; 175 struct buf *buf, *swbuf; 176 char *buffers; 177 178 struct utsname utsname; 179 180 /* 181 * These control when and to what priority a process gets after a certain 182 * amount of CPU time expires. AUTONICETIME is in seconds. 183 * AUTONICEVAL is NOT offset by NZERO, i.e. it's between PRIO_MIN and PRIO_MAX. 184 */ 185 #ifdef AUTONICETIME 186 int autonicetime = AUTONICETIME; 187 #else 188 int autonicetime = (60 * 10); /* 10 minutes */ 189 #endif 190 191 #ifdef AUTONICEVAL 192 int autoniceval = AUTONICEVAL; 193 #else 194 int autoniceval = 4; /* default + 4 */ 195 #endif 196 197 /* 198 * Actual network mbuf sizes (read-only), for netstat. 199 */ 200 int msize = MSIZE; 201 int mclbytes = MCLBYTES; 202
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