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Implement the new BUFCACHE option.

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This commit is contained in:
ross 1998-11-02 04:43:23 +00:00
parent 8a498055f2
commit cee6f4a531
1 changed files with 14 additions and 8 deletions
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22
sys/arch/alpha/alpha/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.153 1998/10/19 22:09:13 tron Exp $ */
/* $NetBSD: machdep.c,v 1.154 1998/11/02 04:43:23 ross Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -82,7 +82,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.153 1998/10/19 22:09:13 tron Exp $");
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.154 1998/11/02 04:43:23 ross Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -208,11 +208,17 @@ int nbuf = NBUF;
#else
int nbuf = 0;
#endif
#ifdef BUFPAGES
int bufpages = BUFPAGES;
#else
int bufpages = 0;
#ifndef BUFPAGES
#define BUFPAGES 0
#endif
#ifndef BUFCACHE
#define BUFCACHE 10
#endif
int bufpages = BUFPAGES; /* optional hardwired count */
int bufcache = BUFCACHE; /* % of RAM to use for buffer cache */
caddr_t msgbufaddr;
int maxmem; /* max memory per process */
@ -952,12 +958,12 @@ allocsys(v)
/*
* Determine how many buffers to allocate.
* We allocate 10% of memory for buffer space. Insure a
* We allocate bufcache % of memory for buffer space. Insure 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 * 100);
bufpages = physmem / CLSIZE * bufcache / 100;
if (nbuf == 0) {
nbuf = bufpages;
if (nbuf < 16)