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

/*
 * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)param.c	8.1 (Berkeley) %G%
 */

#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 <sys/kernel.h>

#include <ufs/ufs/quota.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
 */

#ifndef HZ
#define	HZ 100
#endif
int	hz = HZ;
int	tick = 1000000 / HZ;
int	tickadj = 30000 / (60 * HZ);		/* can adjust 30ms 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	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
b1078c35	1	/*
da83315a KM	2	* Copyright (c) 1980, 1986, 1989 Regents of the University of California.
da83315a KM	3	* All rights reserved.
86cbc46c	4	*
dbf0c423	5	* %sccs.include.redist.c%
da83315a	6	*
598ea503	7	* @(#)param.c 8.1 (Berkeley) %G%
b1078c35 KM	8	*/
b1078c35 KM	9
38a01dbe KB	10	#include <sys/param.h>
	11	#include <sys/systm.h>
	12	#include <sys/socket.h>
	13	#include <sys/proc.h>
	14	#include <sys/vnode.h>
	15	#include <sys/file.h>
	16	#include <sys/callout.h>
	17	#include <sys/clist.h>
	18	#include <sys/mbuf.h>
	19	#include <sys/kernel.h>
	20
	21	#include <ufs/ufs/quota.h>
	22
7d08bbf1	23	#ifdef SYSVSHM
38a01dbe KB	24	#include <machine/vmparam.h>
38a01dbe KB	25	#include <sys/shm.h>
7d08bbf1 KM	26	#endif
7d08bbf1 KM	27
ec6f91b0 BJ	28	/*
	29	* System parameter formulae.
	30	*
	31	* This file is copied into each directory where we compile
	32	* the kernel; it should be modified there to suit local taste
	33	* if necessary.
	34	*
	35	* Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx
	36	*/
	37
46a9a1d7	38	#ifndef HZ
bf75e5ce	39	#define HZ 100
46a9a1d7	40	#endif
ec6f91b0	41	int hz = HZ;
bf75e5ce	42	int tick = 1000000 / HZ;
b03a0fb1	43	int tickadj = 30000 / (60 * HZ); /* can adjust 30ms in 60s */
bf75e5ce	44	struct timezone tz = { TIMEZONE, DST };
582864af	45	#define NPROC (20 + 16 * MAXUSERS)
64504438	46	int maxproc = NPROC;
582864af MK	47	#define NTEXT (80 + NPROC / 8) /* actually the object cache */
582864af MK	48	#define NVNODE (NPROC + NTEXT + 100)
50686e99	49	long desiredvnodes = NVNODE;
582864af	50	int maxfiles = 3 * (NPROC + MAXUSERS) + 80;
2067e85f	51	int ncallout = 16 + NPROC;
e31e5017	52	int nclist = 60 + 12 * MAXUSERS;
582864af	53	int nmbclusters = NMBCLUSTERS;
80b6b780	54	int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
ec6f91b0	55
7d08bbf1	56	/*
582864af	57	* Values in support of System V compatible shared memory. XXX
7d08bbf1 KM	58	*/
	59	#ifdef SYSVSHM
	60	#define SHMMAX (SHMMAXPGS*NBPG)
582864af MK	61	#define SHMMIN 1
582864af MK	62	#define SHMMNI 32 /* <= SHMMMNI in shm.h */
7d08bbf1	63	#define SHMSEG 8
582864af	64	#define SHMALL (SHMMAXPGS/CLSIZE)
7d08bbf1 KM	65
	66	struct shminfo shminfo = {
	67	SHMMAX,
	68	SHMMIN,
	69	SHMMNI,
	70	SHMSEG,
	71	SHMALL
	72	};
	73	#endif
	74
ec6f91b0 BJ	75	/*
	76	* These are initialized at bootstrap time
	77	* to values dependent on memory size
	78	*/
	79	int nbuf, nswbuf;
	80
	81	/*
	82	* These have to be allocated somewhere; allocating
6f33ca1e MK	83	* them here forces loader errors if this file is omitted
6f33ca1e MK	84	* (if they've been externed everywhere else; hah!).
ec6f91b0	85	*/
ec6f91b0 BJ	86	struct callout *callout;
ec6f91b0 BJ	87	struct cblock *cfree;
ec6f91b0	88	struct buf buf, swbuf;
ec6f91b0	89	char *buffers;
76a26bea MK	90
	91	/*
	92	* Proc/pgrp hashing.
	93	* Here so that hash table sizes can depend on MAXUSERS/NPROC.
	94	* Hash size must be a power of two.
	95	* NOW omission of this file will cause loader errors!
	96	*/
	97
	98	#if NPROC > 1024
	99	#define PIDHSZ 512
	100	#else
	101	#if NPROC > 512
	102	#define PIDHSZ 256
	103	#else
	104	#if NPROC > 256
	105	#define PIDHSZ 128
	106	#else
	107	#define PIDHSZ 64
	108	#endif
	109	#endif
	110	#endif
	111
	112	struct proc *pidhash[PIDHSZ];
	113	struct pgrp *pgrphash[PIDHSZ];
	114	int pidhashmask = PIDHSZ - 1;