[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	7.22 (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 "ufs/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
 */

#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	*
b03a0fb1	7	* @(#)param.c 7.22 (Berkeley) %G%
b1078c35 KM	8	*/
b1078c35 KM	9
933ab5e6 KB	10	#include "sys/param.h"
	11	#include "sys/systm.h"
	12	#include "sys/socket.h"
933ab5e6 KB	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"
c26eaddc	19	#include "ufs/ufs/quota.h"
933ab5e6	20	#include "sys/kernel.h"
7d08bbf1 KM	21	#ifdef SYSVSHM
7d08bbf1 KM	22	#include "machine/vmparam.h"
933ab5e6	23	#include "sys/shm.h"
7d08bbf1 KM	24	#endif
7d08bbf1 KM	25
ec6f91b0 BJ	26	/*
	27	* System parameter formulae.
	28	*
	29	* This file is copied into each directory where we compile
	30	* the kernel; it should be modified there to suit local taste
	31	* if necessary.
	32	*
	33	* Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx
	34	*/
	35
46a9a1d7	36	#ifndef HZ
bf75e5ce	37	#define HZ 100
46a9a1d7	38	#endif
ec6f91b0	39	int hz = HZ;
bf75e5ce	40	int tick = 1000000 / HZ;
b03a0fb1	41	int tickadj = 30000 / (60 * HZ); /* can adjust 30ms in 60s */
bf75e5ce	42	struct timezone tz = { TIMEZONE, DST };
582864af	43	#define NPROC (20 + 16 * MAXUSERS)
64504438	44	int maxproc = NPROC;
582864af MK	45	#define NTEXT (80 + NPROC / 8) /* actually the object cache */
582864af MK	46	#define NVNODE (NPROC + NTEXT + 100)
50686e99	47	long desiredvnodes = NVNODE;
582864af	48	int maxfiles = 3 * (NPROC + MAXUSERS) + 80;
2067e85f	49	int ncallout = 16 + NPROC;
e31e5017	50	int nclist = 60 + 12 * MAXUSERS;
582864af	51	int nmbclusters = NMBCLUSTERS;
80b6b780	52	int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
ec6f91b0	53
7d08bbf1	54	/*
582864af	55	* Values in support of System V compatible shared memory. XXX
7d08bbf1 KM	56	*/
	57	#ifdef SYSVSHM
	58	#define SHMMAX (SHMMAXPGS*NBPG)
582864af MK	59	#define SHMMIN 1
582864af MK	60	#define SHMMNI 32 /* <= SHMMMNI in shm.h */
7d08bbf1	61	#define SHMSEG 8
582864af	62	#define SHMALL (SHMMAXPGS/CLSIZE)
7d08bbf1 KM	63
	64	struct shminfo shminfo = {
	65	SHMMAX,
	66	SHMMIN,
	67	SHMMNI,
	68	SHMSEG,
	69	SHMALL
	70	};
	71	#endif
	72
ec6f91b0 BJ	73	/*
	74	* These are initialized at bootstrap time
	75	* to values dependent on memory size
	76	*/
	77	int nbuf, nswbuf;
	78
	79	/*
	80	* These have to be allocated somewhere; allocating
6f33ca1e MK	81	* them here forces loader errors if this file is omitted
6f33ca1e MK	82	* (if they've been externed everywhere else; hah!).
ec6f91b0	83	*/
ec6f91b0 BJ	84	struct callout *callout;
ec6f91b0 BJ	85	struct cblock *cfree;
ec6f91b0	86	struct buf buf, swbuf;
ec6f91b0	87	char *buffers;
76a26bea MK	88
	89	/*
	90	* Proc/pgrp hashing.
	91	* Here so that hash table sizes can depend on MAXUSERS/NPROC.
	92	* Hash size must be a power of two.
	93	* NOW omission of this file will cause loader errors!
	94	*/
	95
	96	#if NPROC > 1024
	97	#define PIDHSZ 512
	98	#else
	99	#if NPROC > 512
	100	#define PIDHSZ 256
	101	#else
	102	#if NPROC > 256
	103	#define PIDHSZ 128
	104	#else
	105	#define PIDHSZ 64
	106	#endif
	107	#endif
	108	#endif
	109
	110	struct proc *pidhash[PIDHSZ];
	111	struct pgrp *pgrphash[PIDHSZ];
	112	int pidhashmask = PIDHSZ - 1;