usr/src/sys/h/vmsystm.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)vmsystm.h   7.1 (Berkeley) 6/4/86
 */

/*
 * Miscellaneous virtual memory subsystem variables and structures.
 */

#ifdef KERNEL
int     freemem;                /* remaining blocks of free memory */
int     avefree;                /* moving average of remaining free blocks */
int     avefree30;              /* 30 sec (avefree is 5 sec) moving average */
int     deficit;                /* estimate of needs of new swapped in procs */
int     nscan;                  /* number of scans in last second */
int     multprog;               /* current multiprogramming degree */
int     desscan;                /* desired pages scanned per second */

/* writable copies of tunables */
int     maxpgio;                /* max paging i/o per sec before start swaps */
int     maxslp;                 /* max sleep time before very swappable */
int     lotsfree;               /* max free before clock freezes */
int     minfree;                /* minimum free pages before swapping begins */
int     desfree;                /* no of pages to try to keep free via daemon */
int     saferss;                /* no pages not to steal; decays with slptime */
int     slowscan;               /* slowest scan rate, clusters/second */
int     fastscan;               /* fastest scan rate, clusters/second */
#endif

/*
 * Fork/vfork accounting.
 */
struct  forkstat
{
        int     cntfork;
        int     cntvfork;
        int     sizfork;
        int     sizvfork;
};
#ifdef KERNEL
struct  forkstat forkstat;
#endif

/*
 * Swap kind accounting.
 */
struct  swptstat
{
        int     pteasy;         /* easy pt swaps */
        int     ptexpand;       /* pt expansion swaps */
        int     ptshrink;       /* pt shrinking swaps */
        int     ptpack;         /* pt swaps involving spte copying */
};
#ifdef KERNEL
struct  swptstat swptstat;
#endif