Subversion Repositories HelenOS

Rev

Rev 2745 | Rev 4377 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
759 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Ondrej Palkovsky
759 palkovsky 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
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1888 jermar 29
/** @addtogroup genericmm
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1888 jermar 35
#ifndef KERN_SLAB_H_
36
#define KERN_SLAB_H_
759 palkovsky 37
 
788 jermar 38
#include <adt/list.h>
759 palkovsky 39
#include <synch/spinlock.h>
1104 jermar 40
#include <atomic.h>
814 palkovsky 41
#include <mm/frame.h>
759 palkovsky 42
 
771 palkovsky 43
/** Minimum size to be allocated by malloc */
791 palkovsky 44
#define SLAB_MIN_MALLOC_W 4
771 palkovsky 45
 
46
/** Maximum size to be allocated by malloc */
1428 palkovsky 47
#define SLAB_MAX_MALLOC_W 18
771 palkovsky 48
 
759 palkovsky 49
/** Initial Magazine size (TODO: dynamically growing magazines) */
50
#define SLAB_MAG_SIZE  4
51
 
52
/** If object size is less, store control structure inside SLAB */
766 palkovsky 53
#define SLAB_INSIDE_SIZE   (PAGE_SIZE >> 3)
759 palkovsky 54
 
762 palkovsky 55
/** Maximum wasted space we allow for cache */
2745 decky 56
#define SLAB_MAX_BADNESS(cache)   (((unsigned int) PAGE_SIZE << (cache)->order) >> 2)
759 palkovsky 57
 
58
/* slab_reclaim constants */
59
 
2106 jermar 60
/** Reclaim all possible memory, because we are in memory stress */
61
#define SLAB_RECLAIM_ALL  0x1 
62
 
759 palkovsky 63
/* cache_create flags */
64
 
2106 jermar 65
/** Do not use per-cpu cache */
66
#define SLAB_CACHE_NOMAGAZINE 0x1
67
/** Have control structure inside SLAB */
68
#define SLAB_CACHE_SLINSIDE   0x2
69
/** We add magazine cache later, if we have this flag */
70
#define SLAB_CACHE_MAGDEFERRED (0x4 | SLAB_CACHE_NOMAGAZINE)
71
 
759 palkovsky 72
typedef struct {
73
    link_t link;
2444 jermar 74
    count_t busy;   /**< Count of full slots in magazine */
75
    count_t size;   /**< Number of slots in magazine */
76
    void *objs[];   /**< Slots in magazine */
1950 jermar 77
} slab_magazine_t;
759 palkovsky 78
 
79
typedef struct {
789 palkovsky 80
    slab_magazine_t *current;
81
    slab_magazine_t *last;
82
    SPINLOCK_DECLARE(lock);
1950 jermar 83
} slab_mag_cache_t;
789 palkovsky 84
 
85
 
86
typedef struct {
759 palkovsky 87
    char *name;
88
 
89
    link_t link;
2106 jermar 90
 
759 palkovsky 91
    /* Configuration */
2106 jermar 92
    /** Size of slab position - align_up(sizeof(obj)) */
93
    size_t size;
94
 
759 palkovsky 95
    int (*constructor)(void *obj, int kmflag);
787 palkovsky 96
    int (*destructor)(void *obj);
759 palkovsky 97
 
2106 jermar 98
    /** Flags changing behaviour of cache */
99
    int flags;
100
 
759 palkovsky 101
    /* Computed values */
2745 decky 102
    uint8_t order;              /**< Order of frames to be allocated */
103
    unsigned int objects;       /**< Number of objects that fit in */
759 palkovsky 104
 
105
    /* Statistics */
764 palkovsky 106
    atomic_t allocated_slabs;
107
    atomic_t allocated_objs;
767 palkovsky 108
    atomic_t cached_objs;
2106 jermar 109
    /** How many magazines in magazines list */
110
    atomic_t magazine_counter;
759 palkovsky 111
 
112
    /* Slabs */
1950 jermar 113
    link_t full_slabs;  /**< List of full slabs */
114
    link_t partial_slabs;   /**< List of partial slabs */
776 palkovsky 115
    SPINLOCK_DECLARE(slablock);
759 palkovsky 116
    /* Magazines  */
1951 jermar 117
    link_t magazines;   /**< List o full magazines */
776 palkovsky 118
    SPINLOCK_DECLARE(maglock);
762 palkovsky 119
 
120
    /** CPU cache */
789 palkovsky 121
    slab_mag_cache_t *mag_cache;
1950 jermar 122
} slab_cache_t;
759 palkovsky 123
 
2106 jermar 124
extern slab_cache_t * slab_cache_create(char *name, size_t size, size_t align,
125
    int (*constructor)(void *obj, int kmflag), int (*destructor)(void *obj),
126
    int flags);
762 palkovsky 127
extern void slab_cache_destroy(slab_cache_t *cache);
759 palkovsky 128
 
762 palkovsky 129
extern void * slab_alloc(slab_cache_t *cache, int flags);
130
extern void slab_free(slab_cache_t *cache, void *obj);
131
extern count_t slab_reclaim(int flags);
759 palkovsky 132
 
2106 jermar 133
/* slab subsytem initialization */
762 palkovsky 134
extern void slab_cache_init(void);
789 palkovsky 135
extern void slab_enable_cpucache(void);
759 palkovsky 136
 
1576 jermar 137
/* kconsole debug */
762 palkovsky 138
extern void slab_print_list(void);
759 palkovsky 139
 
1576 jermar 140
/* malloc support */
822 palkovsky 141
extern void * malloc(unsigned int size, int flags);
2124 decky 142
extern void * realloc(void *ptr, unsigned int size, int flags);
143
extern void free(void *ptr);
759 palkovsky 144
#endif
1702 cejka 145
 
1888 jermar 146
/** @}
1702 cejka 147
 */