vmm_stat.h revision 245678 
1/*-
2 * Copyright (c) 2011 NetApp, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/sys/amd64/vmm/vmm_stat.h 245678 2013-01-20 03:42:49Z neel $
30 */
31
32#ifndef _VMM_STAT_H_
33#define	_VMM_STAT_H_
34
35struct vm;
36
37#define	MAX_VMM_STAT_TYPES	64		/* arbitrary */
38
39struct vmm_stat_type {
40	const char	*desc;		/* description of statistic */
41	int	index;			/* position in the stats buffer */
42};
43
44void	vmm_stat_init(void *arg);
45
46#define	VMM_STAT_DEFINE(type, desc)					\
47	struct vmm_stat_type type[1] = {				\
48		{ desc, -1 }						\
49	};								\
50	SYSINIT(type##_stat, SI_SUB_KLD, SI_ORDER_ANY, vmm_stat_init, type)
51
52void	*vmm_stat_alloc(void);
53void 	vmm_stat_free(void *vp);
54
55/*
56 * 'buf' should be at least fit 'MAX_VMM_STAT_TYPES' entries
57 */
58int	vmm_stat_copy(struct vm *vm, int vcpu, int *num_stats, uint64_t *buf);
59const char *vmm_stat_desc(int index);
60
61static void __inline
62vmm_stat_incr(struct vm *vm, int vcpu, struct vmm_stat_type *vst, uint64_t x)
63{
64#ifdef	VMM_KEEP_STATS
65	uint64_t *stats = vcpu_stats(vm, vcpu);
66	if (vst->index >= 0)
67		stats[vst->index] += x;
68#endif
69}
70
71#endif
72