root/trunk/sys/vmem_impl_user.h

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1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1999-2002 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 /*
27  * Portions Copyright 2006 OmniTI, Inc.
28  */
29
30 #ifndef _SYS_VMEM_IMPL_USER_H
31 #define _SYS_VMEM_IMPL_USER_H
32
33 /* #pragma ident        "@(#)vmem_impl_user.h   1.2     05/06/08 SMI" */
34
35 #if HAVE_SYS_KSTAT
36 #include <sys/kstat.h>
37 #endif
38 #ifndef _WIN32
39 #include <sys/time.h>
40 #endif
41 #include <sys/vmem.h>
42 #if HAVE_THREAD_H
43 #include <thread.h>
44 #else
45 # include "sol_compat.h"
46 #endif
47 #if HAVE_SYNC_H
48 #include <synch.h>
49 #endif
50
51 #ifdef  __cplusplus
52 extern "C" {
53 #endif
54
55 typedef struct vmem_seg vmem_seg_t;
56
57 #define VMEM_STACK_DEPTH        20
58
59 struct vmem_seg {
60         /*
61          * The first four fields must match vmem_freelist_t exactly.
62          */
63         uintptr_t       vs_start;       /* start of segment (inclusive) */
64         uintptr_t       vs_end;         /* end of segment (exclusive) */
65         vmem_seg_t      *vs_knext;      /* next of kin (alloc, free, span) */
66         vmem_seg_t      *vs_kprev;      /* prev of kin */
67
68         vmem_seg_t      *vs_anext;      /* next in arena */
69         vmem_seg_t      *vs_aprev;      /* prev in arena */
70         uint8_t         vs_type;        /* alloc, free, span */
71         uint8_t         vs_import;      /* non-zero if segment was imported */
72         uint8_t         vs_depth;       /* stack depth if UMF_AUDIT active */
73         /*
74          * The following fields are present only when UMF_AUDIT is set.
75          */
76         thread_t        vs_thread;
77         hrtime_t        vs_timestamp;
78         uintptr_t       vs_stack[VMEM_STACK_DEPTH];
79 };
80
81 typedef struct vmem_freelist {
82         uintptr_t       vs_start;       /* always zero */
83         uintptr_t       vs_end;         /* segment size */
84         vmem_seg_t      *vs_knext;      /* next of kin */
85         vmem_seg_t      *vs_kprev;      /* prev of kin */
86 } vmem_freelist_t;
87
88 #define VS_SIZE(vsp)    ((vsp)->vs_end - (vsp)->vs_start)
89
90 /*
91  * Segment hashing
92  */
93 #define VMEM_HASH_INDEX(a, s, q, m)                                     \
94         ((((a) + ((a) >> (s)) + ((a) >> ((s) << 1))) >> (q)) & (m))
95
96 #define VMEM_HASH(vmp, addr)                                            \
97         (&(vmp)->vm_hash_table[VMEM_HASH_INDEX(addr,                    \
98         (vmp)->vm_hash_shift, (vmp)->vm_qshift, (vmp)->vm_hash_mask)])
99
100 #define VMEM_NAMELEN            30
101 #define VMEM_HASH_INITIAL       16
102 #define VMEM_NQCACHE_MAX        16
103 #define VMEM_FREELISTS          (sizeof (void *) * 8)
104
105 typedef struct vmem_kstat {
106         uint64_t        vk_mem_inuse;   /* memory in use */
107         uint64_t        vk_mem_import;  /* memory imported */
108         uint64_t        vk_mem_total;   /* total memory in arena */
109         uint32_t        vk_source_id;   /* vmem id of vmem source */
110         uint64_t        vk_alloc;       /* number of allocations */
111         uint64_t        vk_free;        /* number of frees */
112         uint64_t        vk_wait;        /* number of allocations that waited */
113         uint64_t        vk_fail;        /* number of allocations that failed */
114         uint64_t        vk_lookup;      /* hash lookup count */
115         uint64_t        vk_search;      /* freelist search count */
116         uint64_t        vk_populate_wait;       /* populates that waited */
117         uint64_t        vk_populate_fail;       /* populates that failed */
118         uint64_t        vk_contains;            /* vmem_contains() calls */
119         uint64_t        vk_contains_search;     /* vmem_contains() search cnt */
120 } vmem_kstat_t;
121
122 struct vmem {
123         char            vm_name[VMEM_NAMELEN];  /* arena name */
124         cond_t          vm_cv;          /* cv for blocking allocations */
125         mutex_t         vm_lock;        /* arena lock */
126         uint32_t        vm_id;          /* vmem id */
127         uint32_t        vm_mtbf;        /* induced alloc failure rate */
128         int             vm_cflags;      /* arena creation flags */
129         int             vm_qshift;      /* log2(vm_quantum) */
130         size_t          vm_quantum;     /* vmem quantum */
131         size_t          vm_qcache_max;  /* maximum size to front by umem */
132         vmem_alloc_t    *vm_source_alloc;
133         vmem_free_t     *vm_source_free;
134         vmem_t          *vm_source;     /* vmem source for imported memory */
135         vmem_t          *vm_next;       /* next in vmem_list */
136         ssize_t         vm_nsegfree;    /* number of free vmem_seg_t's */
137         vmem_seg_t      *vm_segfree;    /* free vmem_seg_t list */
138         vmem_seg_t      **vm_hash_table; /* allocated-segment hash table */
139         size_t          vm_hash_mask;   /* hash_size - 1 */
140         size_t          vm_hash_shift;  /* log2(vm_hash_mask + 1) */
141         ulong_t         vm_freemap;     /* bitmap of non-empty freelists */
142         vmem_seg_t      vm_seg0;        /* anchor segment */
143         vmem_seg_t      vm_rotor;       /* rotor for VM_NEXTFIT allocations */
144         vmem_seg_t      *vm_hash0[VMEM_HASH_INITIAL];   /* initial hash table */
145         void            *vm_qcache[VMEM_NQCACHE_MAX];   /* quantum caches */
146         vmem_freelist_t vm_freelist[VMEM_FREELISTS + 1]; /* power-of-2 flists */
147         vmem_kstat_t    vm_kstat;       /* kstat data */
148 };
149
150 /*
151  * We cannot use a mutex_t and MUTEX_HELD, since that will not work
152  * when libthread is not linked.
153  */
154 typedef struct vmem_populate_lock {
155         mutex_t         vmpl_mutex;
156         thread_t        vmpl_thr;
157 } vmem_populate_lock_t;
158
159 #define VM_UMFLAGS      VM_KMFLAGS
160
161 #ifdef  __cplusplus
162 }
163 #endif
164
165 #endif  /* _SYS_VMEM_IMPL_USER_H */
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