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1.1 root 1: /*
2: * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution is only permitted until one year after the first shipment
6: * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
7: * binary forms are permitted provided that: (1) source distributions retain
8: * this entire copyright notice and comment, and (2) distributions including
9: * binaries display the following acknowledgement: This product includes
10: * software developed by the University of California, Berkeley and its
11: * contributors'' in the documentation or other materials provided with the
12: * distribution and in all advertising materials mentioning features or use
13: * of this software. Neither the name of the University nor the names of
14: * its contributors may be used to endorse or promote products derived from
15: * this software without specific prior written permission.
16: * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
17: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
18: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19: *
20: * @(#)param.c 7.14 (Berkeley) 6/28/90
21: */
22:
23: #ifndef lint
24: char copyright[] =
25: "@(#) Copyright (c) 1980, 1986, 1989 Regents of the University of California.\n\
26: All rights reserved.\n";
27: #endif not lint
28:
29: #include "../sys/param.h"
30: #include "../sys/systm.h"
31: #include "../sys/socket.h"
32: #include "../sys/user.h"
33: #include "../sys/proc.h"
34: #include "../sys/text.h"
35: #include "../sys/vnode.h"
36: #include "../sys/file.h"
37: #include "../sys/callout.h"
38: #include "../sys/clist.h"
39: #include "../sys/cmap.h"
40: #include "../sys/mbuf.h"
41: #include "../ufs/quota.h"
42: #include "../sys/kernel.h"
43: #ifdef SYSVSHM
44: #include "machine/vmparam.h"
45: #include "../sys/shm.h"
46: #endif
47:
48: /*
49: * System parameter formulae.
50: *
51: * This file is copied into each directory where we compile
52: * the kernel; it should be modified there to suit local taste
53: * if necessary.
54: *
55: * Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx
56: */
57:
58: #ifndef HZ
59: #define HZ 100
60: #endif
61: int hz = HZ;
62: int tick = 1000000 / HZ;
63: int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */
64: struct timezone tz = { TIMEZONE, DST };
65: #define NPROC (20 + 8 * MAXUSERS)
66: int nproc = NPROC;
67: #define NTEXT (36 + MAXUSERS)
68: int ntext = NTEXT;
69: #define NVNODE (NPROC + NTEXT + 300)
70: long desiredvnodes = NVNODE;
71: int nfile = 16 * (NPROC + 16 + MAXUSERS) / 10 + 32;
72: int ncallout = 16 + NPROC;
73: int nclist = 60 + 12 * MAXUSERS;
74: int nmbclusters = NMBCLUSTERS;
75: int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
76:
77: /*
78: * Values in support of System V compatible shared memory.
79: */
80: #ifdef SYSVSHM
81: #define SHMMAX (SHMMAXPGS*NBPG)
82: #define SHMMIN 1
83: #define SHMMNI 32 /* <= SHMMMNI in shm.h */
84: #define SHMSEG 8
85: #define SHMALL (SHMMAXPGS/CLSIZE)
86:
87: struct shminfo shminfo = {
88: SHMMAX,
89: SHMMIN,
90: SHMMNI,
91: SHMSEG,
92: SHMALL
93: };
94: #endif
95:
96: /*
97: * These are initialized at bootstrap time
98: * to values dependent on memory size
99: */
100: int nbuf, nswbuf;
101:
102: /*
103: * These have to be allocated somewhere; allocating
104: * them here forces loader errors if this file is omitted
105: * (if they've been externed everywhere else; hah!).
106: */
107: struct proc *proc, *procNPROC;
108: struct text *text, *textNTEXT;
109: struct file *file, *fileNFILE;
110: struct callout *callout;
111: struct cblock *cfree;
112: struct buf *buf, *swbuf;
113: char *buffers;
114: struct cmap *cmap, *ecmap;
115:
116: /*
117: * Proc/pgrp hashing.
118: * Here so that hash table sizes can depend on MAXUSERS/NPROC.
119: * Hash size must be a power of two.
120: * NOW omission of this file will cause loader errors!
121: */
122:
123: #if NPROC > 1024
124: #define PIDHSZ 512
125: #else
126: #if NPROC > 512
127: #define PIDHSZ 256
128: #else
129: #if NPROC > 256
130: #define PIDHSZ 128
131: #else
132: #define PIDHSZ 64
133: #endif
134: #endif
135: #endif
136:
137: struct proc *pidhash[PIDHSZ];
138: struct pgrp *pgrphash[PIDHSZ];
139: int pidhashmask = PIDHSZ - 1;
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