Subversion Repositories HelenOS-historic

Rev

Rev 759 | Rev 764 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 759 Rev 762
Line 1... Line 1...
1 
/*
 1 
/*
2 
 * Copyright (C) 2005 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:
Line 36... Line 36...
36 
#define SLAB_MAG_SIZE  4
 36 
#define SLAB_MAG_SIZE  4
37 
 
 37 
 
38 
/** If object size is less, store control structure inside SLAB */
 38 
/** If object size is less, store control structure inside SLAB */
39 
#define SLAB_INSIDE_SIZE   (PAGE_SIZE / 6)
 39 
#define SLAB_INSIDE_SIZE   (PAGE_SIZE / 6)
40 
 
 40 
 
41 
/* slab_alloc constants */
 41 
/** Maximum wasted space we allow for cache */
42 
#define SLAB_ATOMIC       0x1 /**< Do not sleep when no free memory,
42 
#define SLAB_MAX_BADNESS(cache)   ((PAGE_SIZE << (cache)->order) / 4)
43 
                   may return NULL */
 - 
 
44 
#define SLAB_NO_RECLAIM   0x2 /**< Do not try to call slab_reclaim, if no
 - 
 
45 
                 free memory is found - avoid deadlock */
 - 
 
46 
 
 43 
 
47 
/* slab_reclaim constants */
 44 
/* slab_reclaim constants */
48 
#define SLAB_RECLAIM_ALL  0x1 /**< Reclaim all possible memory, because
 45 
#define SLAB_RECLAIM_ALL  0x1 /**< Reclaim all possible memory, because
49 
                   *   we are in memory stress */
 46 
                   *   we are in memory stress */
50 
 
 47 
 
Line 52... Line 49...
52 
#define SLAB_CACHE_NOMAGAZINE 0x1 /**< Do not use per-cpu cache */
 49 
#define SLAB_CACHE_NOMAGAZINE 0x1 /**< Do not use per-cpu cache */
53 
#define SLAB_CACHE_SLINSIDE   0x2 /**< Have control structure inside SLAB */
 50 
#define SLAB_CACHE_SLINSIDE   0x2 /**< Have control structure inside SLAB */
54 
 
 51 
 
55 
typedef struct {
 52 
typedef struct {
56 
    link_t link;
 53 
    link_t link;
57 
    count_t busy;
 54 
    count_t busy;  /**< Count of full slots in magazine */
58 
    count_t size;
 55 
    count_t size;  /**< Number of slots in magazine */
59 
    void *objs[0];
 56 
    void *objs[0]; /**< Slots in magazine */
60 
}slab_magazine_t;
 57 
}slab_magazine_t;
61 
 
 58 
 
62 
typedef struct {
 59 
typedef struct {
63 
    char *name;
 60 
    char *name;
64 
 
 61 
 
65 
    SPINLOCK_DECLARE(lock);
 62 
    SPINLOCK_DECLARE(lock);
66 
    link_t link;
 63 
    link_t link;
67 
    /* Configuration */
 64 
    /* Configuration */
68 
    size_t size;
 - 
 
69 
    size_t align;
 65 
    size_t size;      /**< Size of SLAB position - align_up(sizeof(obj)) */
70 
    int (*constructor)(void *obj, int kmflag);
 66 
    int (*constructor)(void *obj, int kmflag);
71 
    void (*destructor)(void *obj);
 67 
    void (*destructor)(void *obj);
72 
    int flags;
 68 
    int flags;        /**< Flags changing behaviour of cache */
73 
 
 69 
 
74 
    /* Computed values */
 70 
    /* Computed values */
75 
    int pages;
 71 
    __u8 order;        /**< Order of frames to be allocated */
76 
    int objects;
 72 
    int objects;      /**< Number of objects that fit in */
77 
 
 73 
 
78 
    /* Statistics */
 74 
    /* Statistics */
79 
 
 75 
 
80 
    /* Slabs */
 76 
    /* Slabs */
81 
    link_t full_slabs;
 77 
    link_t full_slabs;     /**< List of full slabs */
82 
    link_t partial_slabs;
 78 
    link_t partial_slabs;  /**< List of partial slabs */
83 
    /* Magazines  */
 79 
    /* Magazines  */
84 
    link_t magazines;
 80 
    link_t magazines;      /**< List o full magazines */
- 
 
 81 
 
85 
    /* CPU cache */
 82 
    /** CPU cache */
86 
    struct {
 83 
    struct {
87 
        slab_magazine_t *current;
 84 
        slab_magazine_t *current;
88 
        slab_magazine_t *last;
 85 
        slab_magazine_t *last;
89 
        SPINLOCK_DECLARE(lock);
 86 
        SPINLOCK_DECLARE(lock);
90 
    }mag_cache[0];
 87 
    }mag_cache[0];
91 
}slab_cache_t;
 88 
}slab_cache_t;
92 
 
 89 
 
93 
typedef struct {
 - 
 
94 
    slab_cache_t *cache; /**< Pointer to parent cache */
 - 
 
95 
    void *start;       /**< Start address of first available item */
 - 
 
96 
    count_t available; /**< Count of available items in this slab */
 - 
 
97 
    index_t nextavail; /**< The index of next available item */
 - 
 
98 
}slab_slab_t;
 - 
 
99 
 
 - 
 
100 
 
 - 
 
101 
slab_cache_t * slab_cache_create(char *name,
 90 
extern slab_cache_t * slab_cache_create(char *name,
102 
                 size_t size,
 91 
                    size_t size,
103 
                 size_t align,
 92 
                    size_t align,
104 
                 int (*constructor)(void *obj, int kmflag),
 93 
                    int (*constructor)(void *obj, int kmflag),
105 
                 void (*destructor)(void *obj),
 94 
                    void (*destructor)(void *obj),
106 
                 int flags);
 95 
                    int flags);
107 
void slab_cache_destroy(slab_cache_t *cache);
 96 
extern void slab_cache_destroy(slab_cache_t *cache);
108 
 
 97 
 
109 
void * slab_alloc(slab_cache_t *cache, int flags);
 98 
extern void * slab_alloc(slab_cache_t *cache, int flags);
110 
void slab_free(slab_cache_t *cache, void *obj);
 99 
extern void slab_free(slab_cache_t *cache, void *obj);
111 
count_t slab_reclaim(int flags);
 100 
extern count_t slab_reclaim(int flags);
112 
 
 101 
 
113 
/** Initialize SLAB subsytem */
 102 
/** Initialize SLAB subsytem */
114 
void slab_cache_init(void);
 103 
extern void slab_cache_init(void);
115 
 
 104 
 
116 
/* KConsole debug */
 105 
/* KConsole debug */
117 
void slab_print_list(void);
 106 
extern void slab_print_list(void);
118 
 
 107 
 
119 
#endif
 108 
#endif