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Implement the new BUFCACHE option.

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This commit is contained in:
simonb 1998-11-02 07:43:37 +00:00
parent cee6f4a531
commit 67f74ebee4
1 changed files with 19 additions and 17 deletions
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36
sys/arch/mips/mips/mips_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: mips_machdep.c,v 1.38 1998/10/19 22:09:19 tron Exp $ */
/* $NetBSD: mips_machdep.c,v 1.39 1998/11/02 07:43:37 simonb Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -52,7 +52,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.38 1998/10/19 22:09:19 tron Exp $");
__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.39 1998/11/02 07:43:37 simonb Exp $");
#include "opt_compat_netbsd.h"
#include "opt_compat_ultrix.h"
@ -122,17 +122,20 @@ mips_locore_jumpvec_t mips_locore_jumpvec = {
/*
* Declare these as initialized data so we can patch them.
*/
#ifndef NBUF
#define NBUF 0
#endif
#ifndef BUFPAGES
#define BUFPAGES 0
#endif
#ifndef BUFCACHE
#define BUFCACHE 10
#endif
int nswbuf = 0;
#ifdef NBUF
int nbuf = NBUF;
#else
int nbuf = 0;
#endif
#ifdef BUFPAGES
int bufpages = BUFPAGES;
#else
int bufpages = 0;
#endif
int bufpages = BUFPAGES; /* optional hardwired count */
int bufcache = BUFCACHE; /* % of RAM to use for buffer cache */
int cpu_mhz;
int mips_num_tlb_entries;
@ -1173,14 +1176,13 @@ allocsys(v)
#endif
/*
* Determine how many buffers to allocate. We allocate more
* than the BSD standard of using 10% of memory for the first 2 Meg,
* 5% of remaining. We just allocate a flat 10%. Ensure a minimum
* of 16 buffers. We allocate 1/2 as many swap buffer headers
* as file i/o buffers.
* Determine how many buffers to allocate.
* We allocate bufcache % of memory for buffer space. Ensure a
* minimum of 16 buffers. We allocate 1/2 as many swap buffer
* headers as file i/o buffers.
*/
if (bufpages == 0)
bufpages = physmem / 10 / CLSIZE;
bufpages = physmem / CLSIZE * bufcache / 100;
if (nbuf == 0) {
nbuf = bufpages;
if (nbuf < 16)