[unix-history] / usr / src / sys.386bsd / 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.
 *
 *	@(#)param.c	7.20 (Berkeley) 6/27/91
 */

#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
 */

#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	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
b688fc87 WJ	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	*
	33	* @(#)param.c 7.20 (Berkeley) 6/27/91
	34	*/
	35
	36	#include "sys/param.h"
	37	#include "sys/systm.h"
	38	#include "sys/socket.h"
	39	#include "sys/proc.h"
	40	#include "sys/vnode.h"
	41	#include "sys/file.h"
	42	#include "sys/callout.h"
	43	#include "sys/clist.h"
	44	#include "sys/mbuf.h"
	45	#include "ufs/quota.h"
	46	#include "sys/kernel.h"
	47	#ifdef SYSVSHM
	48	#include "machine/vmparam.h"
	49	#include "sys/shm.h"
	50	#endif
	51
	52	/*
	53	* System parameter formulae.
	54	*
	55	* This file is copied into each directory where we compile
	56	* the kernel; it should be modified there to suit local taste
	57	* if necessary.
	58	*
	59	* Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx
	60	*/
	61
	62	#ifndef HZ
	63	#define HZ 100
	64	#endif
65	int hz = HZ;
66	int tick = 1000000 / HZ;
67	int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */
68	struct timezone tz = { TIMEZONE, DST };
69	#define NPROC (20 + 16 * MAXUSERS)
70	int maxproc = NPROC;
71	#define NTEXT (80 + NPROC / 8) /* actually the object cache */
72	#define NVNODE (NPROC + NTEXT + 100)
73	long desiredvnodes = NVNODE;
74	int maxfiles = 3 * (NPROC + MAXUSERS) + 80;
75	int ncallout = 16 + NPROC;
76	int nclist = 60 + 12 * MAXUSERS;
77	int nmbclusters = NMBCLUSTERS;
78	int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
79
80	/*
81	* Values in support of System V compatible shared memory. XXX
82	*/
83	#ifdef SYSVSHM
84	#define SHMMAX (SHMMAXPGS*NBPG)
85	#define SHMMIN 1
86	#define SHMMNI 32 /* <= SHMMMNI in shm.h */
87	#define SHMSEG 8
88	#define SHMALL (SHMMAXPGS/CLSIZE)
89
90	struct shminfo shminfo = {
91	SHMMAX,
92	SHMMIN,
93	SHMMNI,
94	SHMSEG,
95	SHMALL
96	};
97	#endif
98
99	/*
100	* These are initialized at bootstrap time
101	* to values dependent on memory size
102	*/
103	int nbuf, nswbuf;
104
105	/*
106	* These have to be allocated somewhere; allocating
107	* them here forces loader errors if this file is omitted
108	* (if they've been externed everywhere else; hah!).
109	*/
110	struct callout *callout;
111	struct cblock *cfree;
112	struct buf buf, swbuf;
113	char *buffers;
114
115	/*
116	* Proc/pgrp hashing.
117	* Here so that hash table sizes can depend on MAXUSERS/NPROC.
118	* Hash size must be a power of two.
119	* NOW omission of this file will cause loader errors!
120	*/
121
122	#if NPROC > 1024
123	#define PIDHSZ 512
124	#else
125	#if NPROC > 512
126	#define PIDHSZ 256
127	#else
128	#if NPROC > 256
129	#define PIDHSZ 128
130	#else
131	#define PIDHSZ 64
132	#endif
133	#endif
134	#endif
135
136	struct proc *pidhash[PIDHSZ];
137	struct pgrp *pgrphash[PIDHSZ];
138	int pidhashmask = PIDHSZ - 1;