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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Ondrej Palkovsky |
2 | * Copyright (c) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genericmm |
29 | /** @addtogroup genericmm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef KERN_SLAB_H_ |
35 | #ifndef KERN_SLAB_H_ |
36 | #define KERN_SLAB_H_ |
36 | #define KERN_SLAB_H_ |
37 | 37 | ||
38 | #include <adt/list.h> |
38 | #include <adt/list.h> |
39 | #include <synch/spinlock.h> |
39 | #include <synch/spinlock.h> |
40 | #include <atomic.h> |
40 | #include <atomic.h> |
41 | #include <mm/frame.h> |
41 | #include <mm/frame.h> |
42 | 42 | ||
43 | /** Minimum size to be allocated by malloc */ |
43 | /** Minimum size to be allocated by malloc */ |
44 | #define SLAB_MIN_MALLOC_W 4 |
44 | #define SLAB_MIN_MALLOC_W 4 |
45 | 45 | ||
46 | /** Maximum size to be allocated by malloc */ |
46 | /** Maximum size to be allocated by malloc */ |
47 | #define SLAB_MAX_MALLOC_W 18 |
47 | #define SLAB_MAX_MALLOC_W 18 |
48 | 48 | ||
49 | /** Initial Magazine size (TODO: dynamically growing magazines) */ |
49 | /** Initial Magazine size (TODO: dynamically growing magazines) */ |
50 | #define SLAB_MAG_SIZE 4 |
50 | #define SLAB_MAG_SIZE 4 |
51 | 51 | ||
52 | /** If object size is less, store control structure inside SLAB */ |
52 | /** If object size is less, store control structure inside SLAB */ |
53 | #define SLAB_INSIDE_SIZE (PAGE_SIZE >> 3) |
53 | #define SLAB_INSIDE_SIZE (PAGE_SIZE >> 3) |
54 | 54 | ||
55 | /** Maximum wasted space we allow for cache */ |
55 | /** Maximum wasted space we allow for cache */ |
56 | #define SLAB_MAX_BADNESS(cache) \ |
56 | #define SLAB_MAX_BADNESS(cache) \ |
57 | (((unsigned int) PAGE_SIZE << (cache)->order) >> 2) |
57 | (((unsigned int) PAGE_SIZE << (cache)->order) >> 2) |
58 | 58 | ||
59 | /* slab_reclaim constants */ |
59 | /* slab_reclaim constants */ |
60 | 60 | ||
61 | /** Reclaim all possible memory, because we are in memory stress */ |
61 | /** Reclaim all possible memory, because we are in memory stress */ |
62 | #define SLAB_RECLAIM_ALL 0x1 |
62 | #define SLAB_RECLAIM_ALL 0x1 |
63 | 63 | ||
64 | /* cache_create flags */ |
64 | /* cache_create flags */ |
65 | 65 | ||
66 | /** Do not use per-cpu cache */ |
66 | /** Do not use per-cpu cache */ |
67 | #define SLAB_CACHE_NOMAGAZINE 0x1 |
67 | #define SLAB_CACHE_NOMAGAZINE 0x1 |
68 | /** Have control structure inside SLAB */ |
68 | /** Have control structure inside SLAB */ |
69 | #define SLAB_CACHE_SLINSIDE 0x2 |
69 | #define SLAB_CACHE_SLINSIDE 0x2 |
70 | /** We add magazine cache later, if we have this flag */ |
70 | /** We add magazine cache later, if we have this flag */ |
71 | #define SLAB_CACHE_MAGDEFERRED (0x4 | SLAB_CACHE_NOMAGAZINE) |
71 | #define SLAB_CACHE_MAGDEFERRED (0x4 | SLAB_CACHE_NOMAGAZINE) |
72 | 72 | ||
73 | typedef struct { |
73 | typedef struct { |
74 | link_t link; |
74 | link_t link; |
75 | count_t busy; /**< Count of full slots in magazine */ |
75 | count_t busy; /**< Count of full slots in magazine */ |
76 | count_t size; /**< Number of slots in magazine */ |
76 | count_t size; /**< Number of slots in magazine */ |
77 | void *objs[]; /**< Slots in magazine */ |
77 | void *objs[]; /**< Slots in magazine */ |
78 | } slab_magazine_t; |
78 | } slab_magazine_t; |
79 | 79 | ||
80 | typedef struct { |
80 | typedef struct { |
81 | slab_magazine_t *current; |
81 | slab_magazine_t *current; |
82 | slab_magazine_t *last; |
82 | slab_magazine_t *last; |
83 | SPINLOCK_DECLARE(lock); |
83 | SPINLOCK_DECLARE(lock); |
84 | } slab_mag_cache_t; |
84 | } slab_mag_cache_t; |
85 | 85 | ||
86 | 86 | ||
87 | typedef struct { |
87 | typedef struct { |
88 | char *name; |
88 | char *name; |
89 | 89 | ||
90 | link_t link; |
90 | link_t link; |
91 | 91 | ||
92 | /* Configuration */ |
92 | /* Configuration */ |
93 | /** Size of slab position - align_up(sizeof(obj)) */ |
93 | /** Size of slab position - align_up(sizeof(obj)) */ |
94 | size_t size; |
94 | size_t size; |
95 | 95 | ||
96 | int (*constructor)(void *obj, int kmflag); |
96 | int (*constructor)(void *obj, int kmflag); |
97 | int (*destructor)(void *obj); |
97 | int (*destructor)(void *obj); |
98 | 98 | ||
99 | /** Flags changing behaviour of cache */ |
99 | /** Flags changing behaviour of cache */ |
100 | int flags; |
100 | int flags; |
101 | 101 | ||
102 | /* Computed values */ |
102 | /* Computed values */ |
103 | uint8_t order; /**< Order of frames to be allocated */ |
103 | uint8_t order; /**< Order of frames to be allocated */ |
104 | unsigned int objects; /**< Number of objects that fit in */ |
104 | unsigned int objects; /**< Number of objects that fit in */ |
105 | 105 | ||
106 | /* Statistics */ |
106 | /* Statistics */ |
107 | atomic_t allocated_slabs; |
107 | atomic_t allocated_slabs; |
108 | atomic_t allocated_objs; |
108 | atomic_t allocated_objs; |
109 | atomic_t cached_objs; |
109 | atomic_t cached_objs; |
110 | /** How many magazines in magazines list */ |
110 | /** How many magazines in magazines list */ |
111 | atomic_t magazine_counter; |
111 | atomic_t magazine_counter; |
112 | 112 | ||
113 | /* Slabs */ |
113 | /* Slabs */ |
114 | link_t full_slabs; /**< List of full slabs */ |
114 | link_t full_slabs; /**< List of full slabs */ |
115 | link_t partial_slabs; /**< List of partial slabs */ |
115 | link_t partial_slabs; /**< List of partial slabs */ |
116 | SPINLOCK_DECLARE(slablock); |
116 | SPINLOCK_DECLARE(slablock); |
117 | /* Magazines */ |
117 | /* Magazines */ |
118 | link_t magazines; /**< List o full magazines */ |
118 | link_t magazines; /**< List o full magazines */ |
119 | SPINLOCK_DECLARE(maglock); |
119 | SPINLOCK_DECLARE(maglock); |
120 | 120 | ||
121 | /** CPU cache */ |
121 | /** CPU cache */ |
122 | slab_mag_cache_t *mag_cache; |
122 | slab_mag_cache_t *mag_cache; |
123 | } slab_cache_t; |
123 | } slab_cache_t; |
124 | 124 | ||
125 | extern slab_cache_t *slab_cache_create(char *, size_t, size_t, |
125 | extern slab_cache_t *slab_cache_create(char *, size_t, size_t, |
126 | int (*)(void *, int), int (*)(void *), int); |
126 | int (*)(void *, int), int (*)(void *), int); |
127 | extern void slab_cache_destroy(slab_cache_t *); |
127 | extern void slab_cache_destroy(slab_cache_t *); |
128 | 128 | ||
129 | extern void * slab_alloc(slab_cache_t *, int); |
129 | extern void * slab_alloc(slab_cache_t *, int); |
130 | extern void slab_free(slab_cache_t *, void *); |
130 | extern void slab_free(slab_cache_t *, void *); |
131 | extern count_t slab_reclaim(int); |
131 | extern count_t slab_reclaim(int); |
132 | 132 | ||
133 | /* slab subsytem initialization */ |
133 | /* slab subsytem initialization */ |
134 | extern void slab_cache_init(void); |
134 | extern void slab_cache_init(void); |
135 | extern void slab_enable_cpucache(void); |
135 | extern void slab_enable_cpucache(void); |
136 | 136 | ||
137 | /* kconsole debug */ |
137 | /* kconsole debug */ |
138 | extern void slab_print_list(void); |
138 | extern void slab_print_list(void); |
139 | 139 | ||
140 | /* malloc support */ |
140 | /* malloc support */ |
141 | extern void *malloc(unsigned int, int); |
141 | extern void *malloc(unsigned int, int); |
142 | extern void *realloc(void *, unsigned int, int); |
142 | extern void *realloc(void *, unsigned int, int); |
143 | extern void free(void *); |
143 | extern void free(void *); |
144 | #endif |
144 | #endif |
145 | 145 | ||
146 | /** @} |
146 | /** @} |
147 | */ |
147 | */ |
148 | 148 |