[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: param.c,v 1.8 1994/01/31 04:18:08 davidg Exp $
 */

#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
#ifdef SYSVSEM
#include "sys/sem.h"
#endif
#ifdef SYSVMSG
#include "sys/msg.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;
#ifndef TICKADJ
int	tickadj = 240000 / (60 * HZ);		/* can adjust 240ms in 60s */
#else
int     tickadj = TICKADJ;      /* NTP users may prefer a smaller value */
#endif
struct	timezone tz = { TIMEZONE, DST };
#define	NPROC (20 + 16 * MAXUSERS)
int	maxproc = NPROC;
#define	NTEXT NPROC		/* actually the object cache */
int	vm_cache_max = NTEXT / 2 + 16;
#define	NVNODE (NPROC + NTEXT + 100 + 16)
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

/*
 * Values in support of System V compatible semaphores.
 */

#ifdef SYSVSEM

struct seminfo seminfo = {
                SEMMAP,         /* # of entries in semaphore map */
                SEMMNI,         /* # of semaphore identifiers */
                SEMMNS,         /* # of semaphores in system */
                SEMMNU,         /* # of undo structures in system */
                SEMMSL,         /* max # of semaphores per id */
                SEMOPM,         /* max # of operations per semop call */
                SEMUME,         /* max # of undo entries per process */
                SEMUSZ,         /* size in bytes of undo structure */
                SEMVMX,         /* semaphore maximum value */
                SEMAEM          /* adjust on exit max value */
};
#endif

/*
 * Values in support of System V compatible messages.
 */

#ifdef SYSVMSG

struct msginfo msginfo = {
                MSGMAX,         /* max chars in a message */
                MSGMNI,         /* # of message queue identifiers */
                MSGMNB,         /* max chars in a queue */
                MSGTQL,         /* max messages in system */
                MSGSSZ,         /* size of a message segment */
                		/* (must be small power of 2 greater than 4) */
                MSGSEG          /* number of message segments */
};
#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;

/* From kernel.h: */
long hostid;
char hostname[MAXHOSTNAMELEN];
int hostnamelen;
char domainname[MAXHOSTNAMELEN];
int domainnamelen;

struct timeval boottime;
struct timeval time;

int phz;
int lbolt;

fixpt_t avenrunnable[3];
#if defined(COMPAT_43) && (defined(vax) || defined(tahoe))
double	avenrun[3];
#endif /* COMPAT_43 */

#ifdef GPROF
u_long s_textsize;
int profiling;
u_short *kcount;
char *s_lowpc;
#endif
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	33	* from: @(#)param.c 7.20 (Berkeley) 6/27/91
8b1f8702	34	* $Id: param.c,v 1.8 1994/01/31 04:18:08 davidg Exp $
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
24fd64ab DG	52	#ifdef SYSVSEM
	53	#include "sys/sem.h"
	54	#endif
	55	#ifdef SYSVMSG
	56	#include "sys/msg.h"
	57	#endif
15637ed4 RG	58
	59	/*
	60	* System parameter formulae.
	61	*
	62	* This file is copied into each directory where we compile
	63	* the kernel; it should be modified there to suit local taste
	64	* if necessary.
	65	*
d7f27d01	66	* Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx -DMAXFDESCS=xx
15637ed4 RG	67	*/
	68
	69	#ifndef HZ
	70	#define HZ 100
	71	#endif
	72	int hz = HZ;
	73	int tick = 1000000 / HZ;
e957266e	74	#ifndef TICKADJ
15637ed4	75	int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */
e957266e	76	#else
8b1f8702	77	int tickadj = TICKADJ; /* NTP users may prefer a smaller value */
e957266e	78	#endif
15637ed4 RG	79	struct timezone tz = { TIMEZONE, DST };
	80	#define NPROC (20 + 16 * MAXUSERS)
	81	int maxproc = NPROC;
a200ca2b DG	82	#define NTEXT NPROC /* actually the object cache */
	83	int vm_cache_max = NTEXT / 2 + 16;
	84	#define NVNODE (NPROC + NTEXT + 100 + 16)
15637ed4	85	long desiredvnodes = NVNODE;
d7f27d01	86	int maxfdescs = MAXFDESCS;
15637ed4 RG	87	int maxfiles = 3 * (NPROC + MAXUSERS) + 80;
	88	int ncallout = 16 + NPROC;
	89	int nclist = 60 + 12 * MAXUSERS;
	90	int nmbclusters = NMBCLUSTERS;
	91	int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
	92
	93	/*
	94	* Values in support of System V compatible shared memory. XXX
	95	*/
	96	#ifdef SYSVSHM
	97	#define SHMMAX (SHMMAXPGS*NBPG)
	98	#define SHMMIN 1
	99	#define SHMMNI 32 /* <= SHMMMNI in shm.h */
	100	#define SHMSEG 8
	101	#define SHMALL (SHMMAXPGS/CLSIZE)
	102
	103	struct shminfo shminfo = {
	104	SHMMAX,
	105	SHMMIN,
	106	SHMMNI,
	107	SHMSEG,
	108	SHMALL
	109	};
	110	#endif
	111
24fd64ab DG	112	/*
	113	* Values in support of System V compatible semaphores.
	114	*/
	115
	116	#ifdef SYSVSEM
	117
	118	struct seminfo seminfo = {
	119	SEMMAP, /* # of entries in semaphore map */
	120	SEMMNI, /* # of semaphore identifiers */
	121	SEMMNS, /* # of semaphores in system */
	122	SEMMNU, /* # of undo structures in system */
	123	SEMMSL, /* max # of semaphores per id */
	124	SEMOPM, /* max # of operations per semop call */
	125	SEMUME, /* max # of undo entries per process */
	126	SEMUSZ, /* size in bytes of undo structure */
	127	SEMVMX, /* semaphore maximum value */
	128	SEMAEM /* adjust on exit max value */
	129	};
	130	#endif
	131
	132	/*
	133	* Values in support of System V compatible messages.
	134	*/
	135
	136	#ifdef SYSVMSG
	137
	138	struct msginfo msginfo = {
	139	MSGMAX, /* max chars in a message */
	140	MSGMNI, /* # of message queue identifiers */
	141	MSGMNB, /* max chars in a queue */
	142	MSGTQL, /* max messages in system */
	143	MSGSSZ, /* size of a message segment */
	144	/* (must be small power of 2 greater than 4) */
	145	MSGSEG /* number of message segments */
	146	};
	147	#endif
	148
15637ed4 RG	149	/*
	150	* These are initialized at bootstrap time
	151	* to values dependent on memory size
	152	*/
	153	int nbuf, nswbuf;
	154
	155	/*
	156	* These have to be allocated somewhere; allocating
	157	* them here forces loader errors if this file is omitted
	158	* (if they've been externed everywhere else; hah!).
	159	*/
	160	struct callout *callout;
	161	struct cblock *cfree;
	162	struct buf buf, swbuf;
	163	char *buffers;
	164
	165	/*
	166	* Proc/pgrp hashing.
	167	* Here so that hash table sizes can depend on MAXUSERS/NPROC.
	168	* Hash size must be a power of two.
	169	* NOW omission of this file will cause loader errors!
	170	*/
	171
	172	#if NPROC > 1024
	173	#define PIDHSZ 512
	174	#else
	175	#if NPROC > 512
	176	#define PIDHSZ 256
	177	#else
	178	#if NPROC > 256
	179	#define PIDHSZ 128
	180	#else
	181	#define PIDHSZ 64
	182	#endif
	183	#endif
	184	#endif
	185
	186	struct proc *pidhash[PIDHSZ];
	187	struct pgrp *pgrphash[PIDHSZ];
	188	int pidhashmask = PIDHSZ - 1;
e957266e GW	189
	190	/* From kernel.h: */
	191	long hostid;
	192	char hostname[MAXHOSTNAMELEN];
	193	int hostnamelen;
	194	char domainname[MAXHOSTNAMELEN];
	195	int domainnamelen;
	196
	197	struct timeval boottime;
	198	struct timeval time;
	199
	200	int phz;
	201	int lbolt;
	202
	203	fixpt_t avenrunnable[3];
	204	#if defined(COMPAT_43) && (defined(vax) \|\| defined(tahoe))
	205	double avenrun[3];
	206	#endif /* COMPAT_43 */
	207
	208	#ifdef GPROF
	209	u_long s_textsize;
	210	int profiling;
	211	u_short *kcount;
	212	char *s_lowpc;
	213	#endif