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38 * @(#)param.c 8.3 (Berkeley) 8/20/94
42 #include "opt_param.h"
44 #include <sys/param.h>
47 * System parameter formulae.
49 * This file is copied into each directory where we compile
50 * the kernel; it should be modified there to suit local taste
53 * Compiled with -DMAXUSERS=xx
60 int tick = 1000000 / HZ;
61 int tickadj = howmany(30000, 60 * HZ); /* can adjust 30ms in 60s */
62 #define NPROC (20 + 16 * MAXUSERS)
64 #define MAXFILES (NPROC*2)
66 int maxproc = NPROC; /* maximum # of processes */
67 int maxprocperuid = NPROC-1; /* maximum # of processes per user */
68 int maxfiles = MAXFILES; /* system wide open files limit */
69 int maxfilesperproc = MAXFILES; /* per-process open files limit */
70 int ncallout = 16 + NPROC + MAXFILES; /* maximum # of timer events */
71 int mbuf_wait = 32; /* mbuf sleep time in ticks */
73 /* maximum # of sf_bufs (sendfile(2) zero-copy virtual buffers) */
75 #define NSFBUFS (512 + MAXUSERS * 16)
77 int nsfbufs = NSFBUFS;
80 * These may be set to nonzero here or by patching.
81 * If they are nonzero at bootstrap time then they are
82 * initialized to values dependent on the memory size.
92 * These have to be allocated somewhere; allocating
93 * them here forces loader errors if this file is omitted
94 * (if they've been externed everywhere else; hah!).
99 * Total number of shared mutexes to protect all lockmgr locks.
104 int lock_nmtx = LOCKMUTEX;