/* 
 * Mach Operating System
 * Copyright (c) 1993-1987 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 *	File:	mach/vm_statistics.h
 *	Author:	Avadis Tevanian, Jr., Michael Wayne Young, David Golub
 *
 *	Virtual memory statistics structure.
 *
 */

#ifndef	_MACH_VM_STATISTICS_H_
#define	_MACH_VM_STATISTICS_H_

#include <mach/machine/vm_types.h>

struct vm_statistics {
	integer_t	pagesize;		/* page size in bytes */
	integer_t	free_count;		/* # of pages free */
	integer_t	active_count;		/* # of pages active */
	integer_t	inactive_count;		/* # of pages inactive */
	integer_t	wire_count;		/* # of pages wired down */
	integer_t	zero_fill_count;	/* # of zero fill pages */
	integer_t	reactivations;		/* # of pages reactivated */
	integer_t	pageins;		/* # of pageins */
	integer_t	pageouts;		/* # of pageouts */
	integer_t	faults;			/* # of faults */
	integer_t	cow_faults;		/* # of copy-on-writes */
	integer_t	lookups;		/* object cache lookups */
	integer_t	hits;			/* object cache hits */
};

typedef struct vm_statistics	*vm_statistics_t;
typedef struct vm_statistics	vm_statistics_data_t;

#ifdef	MACH_KERNEL
extern vm_statistics_data_t	vm_stat;
#endif	/* MACH_KERNEL */

/*
 *	Each machine dependent implementation is expected to
 *	keep certain statistics.  They may do this anyway they
 *	so choose, but are expected to return the statistics
 *	in the following structure.
 */

struct pmap_statistics {
	integer_t		resident_count;	/* # of pages mapped (total)*/
	integer_t		wired_count;	/* # of pages wired */
};

typedef struct pmap_statistics	*pmap_statistics_t;
#endif	/* _MACH_VM_STATISTICS_H_ */