[unix-history] / sys / conf / param.c

/*
 * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)param.c	7.20 (Berkeley) 6/27/91
 *	$Id$
 */

#include "sys/param.h"
#include "sys/systm.h"
#include "sys/socket.h"
#include "sys/proc.h"
#include "sys/vnode.h"
#include "sys/file.h"
#include "sys/callout.h"
#include "sys/clist.h"
#include "sys/mbuf.h"
#include "ufs/quota.h"
#include "sys/kernel.h"
#ifdef SYSVSHM
#include "machine/vmparam.h"
#include "sys/shm.h"
#endif

/*
 * System parameter formulae.
 *
 * This file is copied into each directory where we compile
 * the kernel; it should be modified there to suit local taste
 * if necessary.
 *
 * Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx -DMAXFDESCS=xx
 */

#ifndef HZ
#define	HZ 100
#endif
int	hz = HZ;
int	tick = 1000000 / HZ;
int	tickadj = 240000 / (60 * HZ);		/* can adjust 240ms in 60s */
struct	timezone tz = { TIMEZONE, DST };
#define	NPROC (20 + 16 * MAXUSERS)
int	maxproc = NPROC;
#define	NTEXT (80 + NPROC / 8)			/* actually the object cache */
#define	NVNODE (NPROC + NTEXT + 100)
long	desiredvnodes = NVNODE;
int	maxfdescs = MAXFDESCS;
int	maxfiles = 3 * (NPROC + MAXUSERS) + 80;
int	ncallout = 16 + NPROC;
int	nclist = 60 + 12 * MAXUSERS;
int	nmbclusters = NMBCLUSTERS;
int	fscale = FSCALE;	/* kernel uses `FSCALE', user uses `fscale' */

/*
 * Values in support of System V compatible shared memory.	XXX
 */
#ifdef SYSVSHM
#define	SHMMAX	(SHMMAXPGS*NBPG)
#define	SHMMIN	1
#define	SHMMNI	32			/* <= SHMMMNI in shm.h */
#define	SHMSEG	8
#define	SHMALL	(SHMMAXPGS/CLSIZE)

struct	shminfo shminfo = {
	SHMMAX,
	SHMMIN,
	SHMMNI,
	SHMSEG,
	SHMALL
};
#endif

/*
 * These are initialized at bootstrap time
 * to values dependent on memory size
 */
int	nbuf, nswbuf;

/*
 * These have to be allocated somewhere; allocating
 * them here forces loader errors if this file is omitted
 * (if they've been externed everywhere else; hah!).
 */
struct 	callout *callout;
struct	cblock *cfree;
struct	buf *buf, *swbuf;
char	*buffers;

/*
 * Proc/pgrp hashing.
 * Here so that hash table sizes can depend on MAXUSERS/NPROC.
 * Hash size must be a power of two.
 * NOW omission of this file will cause loader errors!
 */

#if NPROC > 1024
#define	PIDHSZ		512
#else
#if NPROC > 512
#define	PIDHSZ		256
#else
#if NPROC > 256
#define	PIDHSZ		128
#else
#define	PIDHSZ		64
#endif
#endif
#endif

struct	proc *pidhash[PIDHSZ];
struct	pgrp *pgrphash[PIDHSZ];
int	pidhashmask = PIDHSZ - 1;
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1980, 1986, 1989 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
be581a37 RG	33	* from: @(#)param.c 7.20 (Berkeley) 6/27/91
be581a37 RG	34	* $Id$
15637ed4 RG	35	*/
	36
	37	#include "sys/param.h"
	38	#include "sys/systm.h"
	39	#include "sys/socket.h"
	40	#include "sys/proc.h"
	41	#include "sys/vnode.h"
	42	#include "sys/file.h"
	43	#include "sys/callout.h"
	44	#include "sys/clist.h"
	45	#include "sys/mbuf.h"
	46	#include "ufs/quota.h"
	47	#include "sys/kernel.h"
	48	#ifdef SYSVSHM
	49	#include "machine/vmparam.h"
	50	#include "sys/shm.h"
	51	#endif
	52
	53	/*
	54	* System parameter formulae.
	55	*
	56	* This file is copied into each directory where we compile
	57	* the kernel; it should be modified there to suit local taste
	58	* if necessary.
	59	*
d7f27d01	60	* Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx -DMAXFDESCS=xx
15637ed4 RG	61	*/
	62
	63	#ifndef HZ
	64	#define HZ 100
	65	#endif
	66	int hz = HZ;
	67	int tick = 1000000 / HZ;
	68	int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */
	69	struct timezone tz = { TIMEZONE, DST };
	70	#define NPROC (20 + 16 * MAXUSERS)
	71	int maxproc = NPROC;
	72	#define NTEXT (80 + NPROC / 8) /* actually the object cache */
	73	#define NVNODE (NPROC + NTEXT + 100)
	74	long desiredvnodes = NVNODE;
d7f27d01	75	int maxfdescs = MAXFDESCS;
15637ed4 RG	76	int maxfiles = 3 * (NPROC + MAXUSERS) + 80;
	77	int ncallout = 16 + NPROC;
	78	int nclist = 60 + 12 * MAXUSERS;
	79	int nmbclusters = NMBCLUSTERS;
	80	int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
	81
	82	/*
	83	* Values in support of System V compatible shared memory. XXX
	84	*/
	85	#ifdef SYSVSHM
	86	#define SHMMAX (SHMMAXPGS*NBPG)
	87	#define SHMMIN 1
	88	#define SHMMNI 32 /* <= SHMMMNI in shm.h */
	89	#define SHMSEG 8
	90	#define SHMALL (SHMMAXPGS/CLSIZE)
	91
	92	struct shminfo shminfo = {
	93	SHMMAX,
	94	SHMMIN,
	95	SHMMNI,
	96	SHMSEG,
	97	SHMALL
	98	};
	99	#endif
	100
	101	/*
	102	* These are initialized at bootstrap time
	103	* to values dependent on memory size
	104	*/
	105	int nbuf, nswbuf;
	106
	107	/*
	108	* These have to be allocated somewhere; allocating
	109	* them here forces loader errors if this file is omitted
	110	* (if they've been externed everywhere else; hah!).
	111	*/
	112	struct callout *callout;
	113	struct cblock *cfree;
	114	struct buf buf, swbuf;
	115	char *buffers;
	116
	117	/*
	118	* Proc/pgrp hashing.
	119	* Here so that hash table sizes can depend on MAXUSERS/NPROC.
	120	* Hash size must be a power of two.
	121	* NOW omission of this file will cause loader errors!
	122	*/
	123
	124	#if NPROC > 1024
	125	#define PIDHSZ 512
	126	#else
	127	#if NPROC > 512
	128	#define PIDHSZ 256
	129	#else
	130	#if NPROC > 256
	131	#define PIDHSZ 128
	132	#else
	133	#define PIDHSZ 64
	134	#endif
	135	#endif
	136	#endif
	137
	138	struct proc *pidhash[PIDHSZ];
	139	struct pgrp *pgrphash[PIDHSZ];
140	int pidhashmask = PIDHSZ - 1;