129 lines
4.1 KiB
C
129 lines
4.1 KiB
C
/* $OpenBSD: param.c,v 1.50 2024/05/05 06:14:37 jsg Exp $ */
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/* $NetBSD: param.c,v 1.16 1996/03/12 03:08:40 mrg Exp $ */
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/*
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* Copyright (c) 1980, 1986, 1989 Regents of the University of California.
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* All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)param.c 7.20 (Berkeley) 6/27/91
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/utsname.h>
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#ifdef SYSVSHM
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#include <machine/vmparam.h>
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#include <sys/shm.h>
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#endif
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#ifdef SYSVSEM
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#include <sys/sem.h>
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#endif
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/*
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* System parameter formulae.
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*
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* This file is copied into each directory where we compile
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* the kernel; it should be modified there to suit local taste
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* if necessary.
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*
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* Compiled with -DHZ=xx -DMAXUSERS=xx
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*/
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int hz = HZ;
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int tick = 1000000 / HZ;
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int tick_nsec = 1000000000 / HZ;
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int utc_offset = 0;
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#define NPROCESS (30 + 16 * MAXUSERS)
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#define NTEXT (80 + NPROCESS / 8) /* actually the object cache */
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#define NVNODE (NPROCESS * 2 + NTEXT + 100)
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int initialvnodes = NVNODE;
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int maxprocess = NPROCESS;
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int maxthread = 2 * NPROCESS;
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int maxfiles = 5 * (NPROCESS + MAXUSERS) + 80;
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long nmbclust = NMBCLUSTERS;
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#ifndef BUFCACHEPERCENT
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#define BUFCACHEPERCENT 20
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#endif
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int bufcachepercent = BUFCACHEPERCENT;
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#ifndef BUFPAGES
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#define BUFPAGES 0
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#endif
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long bufpages = BUFPAGES;
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int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
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/*
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* Values in support of System V compatible shared memory. XXX
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*/
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#ifdef SYSVSHM
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#define SHMMAX SHMMAXPGS /* shminit() performs a `*= PAGE_SIZE' */
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#define SHMMIN 1
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#define SHMMNI 128 /* <64k, see IPCID_TO_IX in ipc.h */
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#define SHMSEG 128
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#define SHMALL (SHMMAXPGS)
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struct shminfo shminfo = {
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SHMMAX,
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SHMMIN,
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SHMMNI,
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SHMSEG,
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SHMALL
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};
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#endif
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/*
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* Values in support of System V compatible semaphores.
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*/
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#ifdef SYSVSEM
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struct seminfo seminfo = {
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SEMMNI, /* # of semaphore identifiers */
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SEMMNS, /* # of semaphores in system */
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SEMMNU, /* # of undo structures in system */
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SEMMSL, /* max # of semaphores per id */
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SEMOPM, /* max # of operations per semop call */
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SEMUME, /* max # of undo entries per process */
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SEMUSZ, /* size in bytes of undo structure */
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SEMVMX, /* semaphore maximum value */
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SEMAEM /* adjust on exit max value */
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};
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#endif
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/*
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* This has to be allocated somewhere; allocating
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* them here forces loader errors if this file is omitted
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* (if they've been externed everywhere else; hah!).
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*/
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struct utsname utsname;
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