home *** CD-ROM | disk | FTP | other *** search
- head 1.2;
- branch ;
- access ;
- symbols ;
- locks ; strict;
- comment @ * @;
-
-
- 1.2
- date 90.12.07.23.54.18; author rab; state Exp;
- branches ;
- next 1.1;
-
- 1.1
- date 90.11.12.18.07.52; author rab; state Exp;
- branches ;
- next ;
-
-
- desc
- @@
-
-
- 1.2
- log
- @A lot of stuff in this file is wrong. I #ifdef'ed it out.
- @
- text
- @/* @@(#)vmparam.h 1.10 88/08/19 SMI */
-
- /*
- * Copyright (c) 1987 by Sun Microsystems, Inc.
- */
-
- #ifndef _sun4_vmparam_h
- #define _sun4_vmparam_h
-
-
- /*
- * None of this stuff is right for sprite.
- */
- #ifndef sprite
-
- #include <sun4/param.h>
-
- /*
- * Machine dependent constants for Sun-4
- */
-
- /*
- * USRTEXT is the start of the user text/data space, while USRSTACK
- * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are
- * the number of pages from the beginning of the user address space
- * to the beginning of the text and from the end of the stack to the
- * end of the user address space respectively.
- */
- #define USRTEXT 0x2000
- #define USRSTACK KERNELBASE
- #define LOWPAGES btoc(USRTEXT)
- #define HIGHPAGES 0
-
- /*
- * Virtual memory related constants for UNIX resource control, all in bytes
- * The default stack size of 8M allows an optimization of mmu mapping
- * resources so that in normal use a single mmu region map entry (smeg)
- * can be used to map both the stack and shared libraries
- */
- #define DFLSSIZ (8*1024*1024) /* initial stack size limit */
-
- #define DFLDSIZ_260 ((512*1024*1024)-USRTEXT) /* initial data size limit */
- #define MAXDSIZ_260 ((512*1024*1024)-USRTEXT) /* max data size limit */
- #define MAXSSIZ_260 ((512*1024*1024)-KERNELSIZE)/* max stack size limit */
-
- #define DFLDSIZ_460 ((2048*1024*1024)-USRTEXT) /* initial data size limit */
- #define MAXDSIZ_460 ((2048*1024*1024)-USRTEXT) /* max data size limit */
- #define MAXSSIZ_460 ((2048*1024*1024)-KERNELSIZE)/* max stack size limit */
-
- #define DFLDSIZ dfldsiz
- #define MAXDSIZ maxdsiz
- #define MAXSSIZ maxssiz
-
- #ifndef LOCORE
- extern unsigned int dfldsiz;
- extern unsigned int maxdsiz;
- extern unsigned int maxssiz;
- #endif !LOCORE
-
- #define SSIZE 1 /* initial stack size */
- #define SINCR 1 /* increment of stack */
-
- /*
- * Size of the kernel segkmem system pte table. This virtual
- * space is controlled by the resource map "kernelmap".
- */
- #define SYSPTSIZE (0x640000 / MMU_PAGESIZE)
-
- /*
- * Minimum allowable virtual address space to be used
- * by the seg_map segment driver for fast kernel mappings.
- */
- #define MINMAPSIZE 0x200000
-
- /*
- * The time for a process to be blocked before being very swappable.
- * This is a number of seconds which the system takes as being a non-trivial
- * amount of real time. You probably shouldn't change this;
- * it is used in subtle ways (fractions and multiples of it are, that is, like
- * half of a ``long time'', almost a long time, etc.)
- * It is related to human patience and other factors which don't really
- * change over time.
- */
- #define MAXSLP 20
-
- /*
- * A swapped in process is given a small amount of core without being bothered
- * by the page replacement algorithm. Basically this says that if you are
- * swapped in you deserve some resources. We protect the last SAFERSS
- * pages against paging and will just swap you out rather than paging you.
- * Note that each process has at least UPAGES pages which are not
- * paged anyways so this number just means a swapped in process is
- * given around 32k bytes.
- */
- #define SAFERSS 3 /* nominal ``small'' resident set size
- protected against replacement */
-
- /*
- * DISKRPM is used to estimate the number of paging i/o operations
- * which one can expect from a single disk controller.
- */
- #define DISKRPM 60
-
- /*
- * Paging thresholds (see vm_pageout.c).
- * Strategy of 3/17/83:
- * lotsfree is 256k bytes, but at most 1/8 of memory
- * desfree is 100k bytes, but at most 1/16 of memory
- * minfree is 32k bytes, but at most 1/2 of desfree
- */
- #define LOTSFREE (256 * 1024)
- #define LOTSFREEFRACT 8
- #define DESFREE (100 * 1024)
- #define DESFREEFRACT 16
- #define MINFREE (32 * 1024)
- #define MINFREEFRACT 2
-
- /*
- * There are two clock hands, initially separated by HANDSPREAD bytes
- * (but at most all of user memory). The amount of time to reclaim
- * a page once the pageout process examines it increases with this
- * distance and decreases as the scan rate rises.
- */
- #define HANDSPREAD (2 * 1024 * 1024)
-
- /*
- * Paged text files that are less than PGTHRESH bytes
- * may be "prefaulted in" instead of demand paged.
- */
- #define PGTHRESH (280 * 1024)
- #endif
- #endif /*!_sun4_vmparam_h*/
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d10 6
- d131 1
- a131 1
-
- @
-