Mercurial > hg > nginx
annotate src/core/ngx_slab.c @ 6828:99770a5ea14f
Slab: slots statistics.
For each slot, the number of total and used entries, as well as
the number of allocation requests and failures, are tracked.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 07 Dec 2016 22:25:37 +0300 |
parents | 0e61510c56c4 |
children | 6e757036e588 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
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11 #define NGX_SLAB_PAGE_MASK 3 |
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12 #define NGX_SLAB_PAGE 0 |
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13 #define NGX_SLAB_BIG 1 |
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14 #define NGX_SLAB_EXACT 2 |
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15 #define NGX_SLAB_SMALL 3 |
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16 |
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17 #if (NGX_PTR_SIZE == 4) |
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18 |
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19 #define NGX_SLAB_PAGE_FREE 0 |
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20 #define NGX_SLAB_PAGE_BUSY 0xffffffff |
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21 #define NGX_SLAB_PAGE_START 0x80000000 |
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22 |
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23 #define NGX_SLAB_SHIFT_MASK 0x0000000f |
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24 #define NGX_SLAB_MAP_MASK 0xffff0000 |
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25 #define NGX_SLAB_MAP_SHIFT 16 |
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26 |
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27 #define NGX_SLAB_BUSY 0xffffffff |
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28 |
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29 #else /* (NGX_PTR_SIZE == 8) */ |
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30 |
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31 #define NGX_SLAB_PAGE_FREE 0 |
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32 #define NGX_SLAB_PAGE_BUSY 0xffffffffffffffff |
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33 #define NGX_SLAB_PAGE_START 0x8000000000000000 |
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34 |
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35 #define NGX_SLAB_SHIFT_MASK 0x000000000000000f |
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36 #define NGX_SLAB_MAP_MASK 0xffffffff00000000 |
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37 #define NGX_SLAB_MAP_SHIFT 32 |
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38 |
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39 #define NGX_SLAB_BUSY 0xffffffffffffffff |
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40 |
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41 #endif |
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42 |
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43 |
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44 #define ngx_slab_slots(pool) \ |
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45 (ngx_slab_page_t *) ((u_char *) (pool) + sizeof(ngx_slab_pool_t)) |
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46 |
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47 #define ngx_slab_page_type(page) ((page)->prev & NGX_SLAB_PAGE_MASK) |
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48 |
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49 #define ngx_slab_page_prev(page) \ |
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50 (ngx_slab_page_t *) ((page)->prev & ~NGX_SLAB_PAGE_MASK) |
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51 |
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52 #define ngx_slab_page_addr(pool, page) \ |
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53 ((((page) - (pool)->pages) << ngx_pagesize_shift) \ |
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54 + (uintptr_t) (pool)->start) |
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55 |
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56 |
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57 #if (NGX_DEBUG_MALLOC) |
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58 |
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59 #define ngx_slab_junk(p, size) ngx_memset(p, 0xA5, size) |
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60 |
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61 #elif (NGX_HAVE_DEBUG_MALLOC) |
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62 |
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63 #define ngx_slab_junk(p, size) \ |
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64 if (ngx_debug_malloc) ngx_memset(p, 0xA5, size) |
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65 |
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66 #else |
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67 |
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68 #define ngx_slab_junk(p, size) |
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69 |
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70 #endif |
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71 |
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72 static ngx_slab_page_t *ngx_slab_alloc_pages(ngx_slab_pool_t *pool, |
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73 ngx_uint_t pages); |
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74 static void ngx_slab_free_pages(ngx_slab_pool_t *pool, ngx_slab_page_t *page, |
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75 ngx_uint_t pages); |
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76 static void ngx_slab_error(ngx_slab_pool_t *pool, ngx_uint_t level, |
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77 char *text); |
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78 |
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79 |
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80 static ngx_uint_t ngx_slab_max_size; |
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81 static ngx_uint_t ngx_slab_exact_size; |
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82 static ngx_uint_t ngx_slab_exact_shift; |
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83 |
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84 |
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85 void |
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86 ngx_slab_init(ngx_slab_pool_t *pool) |
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87 { |
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88 u_char *p; |
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89 size_t size; |
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90 ngx_int_t m; |
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91 ngx_uint_t i, n, pages; |
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92 ngx_slab_page_t *slots, *page; |
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93 |
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94 /* STUB */ |
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95 if (ngx_slab_max_size == 0) { |
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96 ngx_slab_max_size = ngx_pagesize / 2; |
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97 ngx_slab_exact_size = ngx_pagesize / (8 * sizeof(uintptr_t)); |
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98 for (n = ngx_slab_exact_size; n >>= 1; ngx_slab_exact_shift++) { |
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99 /* void */ |
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100 } |
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101 } |
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102 /**/ |
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103 |
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104 pool->min_size = 1 << pool->min_shift; |
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105 |
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106 slots = ngx_slab_slots(pool); |
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107 |
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108 p = (u_char *) slots; |
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109 size = pool->end - p; |
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110 |
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111 ngx_slab_junk(p, size); |
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112 |
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113 n = ngx_pagesize_shift - pool->min_shift; |
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114 |
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115 for (i = 0; i < n; i++) { |
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116 /* only "next" is used in list head */ |
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117 slots[i].slab = 0; |
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118 slots[i].next = &slots[i]; |
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119 slots[i].prev = 0; |
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120 } |
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Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
121 |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
122 p += n * sizeof(ngx_slab_page_t); |
6828 | 123 |
124 pool->stats = (ngx_slab_stat_t *) p; | |
125 ngx_memzero(pool->stats, n * sizeof(ngx_slab_stat_t)); | |
126 | |
127 p += n * sizeof(ngx_slab_stat_t); | |
128 | |
129 size -= n * (sizeof(ngx_slab_page_t) + sizeof(ngx_slab_stat_t)); | |
860
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parents:
826
diff
changeset
|
130 |
1645
31622d9f2c0d
the simple expression has the same precision without overflow
Igor Sysoev <igor@sysoev.ru>
parents:
1018
diff
changeset
|
131 pages = (ngx_uint_t) (size / (ngx_pagesize + sizeof(ngx_slab_page_t))); |
860
201d017ea470
slab allocator in shared memory
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parents:
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diff
changeset
|
132 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
133 pool->pages = (ngx_slab_page_t *) p; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
134 ngx_memzero(pool->pages, pages * sizeof(ngx_slab_page_t)); |
860
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slab allocator in shared memory
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parents:
826
diff
changeset
|
135 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
136 page = pool->pages; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
137 |
6824
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
138 /* only "next" is used in list head */ |
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
139 pool->free.slab = 0; |
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
140 pool->free.next = page; |
860
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slab allocator in shared memory
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parents:
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diff
changeset
|
141 pool->free.prev = 0; |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
142 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
143 page->slab = pages; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
144 page->next = &pool->free; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
145 page->prev = (uintptr_t) &pool->free; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
146 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
147 pool->start = ngx_align_ptr(p + pages * sizeof(ngx_slab_page_t), |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
148 ngx_pagesize); |
860
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diff
changeset
|
149 |
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diff
changeset
|
150 m = pages - (pool->end - pool->start) / ngx_pagesize; |
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diff
changeset
|
151 if (m > 0) { |
201d017ea470
slab allocator in shared memory
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diff
changeset
|
152 pages -= m; |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
153 page->slab = pages; |
860
201d017ea470
slab allocator in shared memory
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diff
changeset
|
154 } |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
155 |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
156 pool->last = pool->pages + pages; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
157 |
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
158 pool->log_nomem = 1; |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
159 pool->log_ctx = &pool->zero; |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
160 pool->zero = '\0'; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
161 } |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
162 |
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 |
860
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slab allocator in shared memory
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parents:
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diff
changeset
|
164 void * |
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diff
changeset
|
165 ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size) |
201d017ea470
slab allocator in shared memory
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diff
changeset
|
166 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
167 void *p; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
168 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
169 ngx_shmtx_lock(&pool->mutex); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
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parents:
881
diff
changeset
|
170 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
171 p = ngx_slab_alloc_locked(pool, size); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
172 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
173 ngx_shmtx_unlock(&pool->mutex); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
174 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
175 return p; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
176 } |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
177 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
178 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
179 void * |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
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parents:
881
diff
changeset
|
180 ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size) |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
181 { |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
182 size_t s; |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
183 uintptr_t p, n, m, mask, *bitmap; |
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
184 ngx_uint_t i, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
185 ngx_slab_page_t *page, *prev, *slots; |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
186 |
5766
abdb027be9d5
Core: bugfix for the ngx_slab_max_size case.
Jianjun Zheng <codeeply@gmail.com>
parents:
5726
diff
changeset
|
187 if (size > ngx_slab_max_size) { |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
188 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
189 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
967 | 190 "slab alloc: %uz", size); |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
191 |
4829
40de49cf6b37
Fixed overflow if ngx_slab_alloc() is called with very big "size" argument.
Ruslan Ermilov <ru@nginx.com>
parents:
4764
diff
changeset
|
192 page = ngx_slab_alloc_pages(pool, (size >> ngx_pagesize_shift) |
40de49cf6b37
Fixed overflow if ngx_slab_alloc() is called with very big "size" argument.
Ruslan Ermilov <ru@nginx.com>
parents:
4764
diff
changeset
|
193 + ((size % ngx_pagesize) ? 1 : 0)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
194 if (page) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
195 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
196 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
197 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
198 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
199 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
200 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
201 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
202 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
203 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
204 if (size > pool->min_size) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
205 shift = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
206 for (s = size - 1; s >>= 1; shift++) { /* void */ } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
207 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
208 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
209 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
210 shift = pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
211 slot = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
212 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
213 |
6828 | 214 pool->stats[slot].reqs++; |
215 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
216 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
217 "slab alloc: %uz slot: %ui", size, slot); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
218 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
219 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
220 page = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
221 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
222 if (page->next != page) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
223 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
224 if (shift < ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
225 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
226 bitmap = (uintptr_t *) ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
227 |
6827 | 228 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
229 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
230 for (n = 0; n < map; n++) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
231 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
232 if (bitmap[n] != NGX_SLAB_BUSY) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
233 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
234 for (m = 1, i = 0; m; m <<= 1, i++) { |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
235 if (bitmap[n] & m) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
236 continue; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
237 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
238 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
239 bitmap[n] |= m; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
240 |
6827 | 241 i = (n * sizeof(uintptr_t) * 8 + i) << shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
242 |
6828 | 243 p = (uintptr_t) bitmap + i; |
244 | |
245 pool->stats[slot].used++; | |
246 | |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
247 if (bitmap[n] == NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
248 for (n = n + 1; n < map; n++) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
249 if (bitmap[n] != NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
250 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
251 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
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|
252 } |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
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diff
changeset
|
253 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
254 prev = ngx_slab_page_prev(page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
255 prev->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
256 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
257 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
258 page->next = NULL; |
6826
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Slab: simplified allocation from slots.
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parents:
6825
diff
changeset
|
259 page->prev = NGX_SLAB_SMALL; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
260 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
261 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
262 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
263 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
264 } |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
265 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
266 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
267 } else if (shift == ngx_slab_exact_shift) { |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
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diff
changeset
|
268 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
269 for (m = 1, i = 0; m; m <<= 1, i++) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
270 if (page->slab & m) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
271 continue; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
272 } |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
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diff
changeset
|
273 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
274 page->slab |= m; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
275 |
6826
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Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
276 if (page->slab == NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
6825
diff
changeset
|
277 prev = ngx_slab_page_prev(page); |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
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diff
changeset
|
278 prev->next = page->next; |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
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diff
changeset
|
279 page->next->prev = page->prev; |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
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diff
changeset
|
280 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
281 page->next = NULL; |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
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diff
changeset
|
282 page->prev = NGX_SLAB_EXACT; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
283 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
284 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
285 p = ngx_slab_page_addr(pool, page) + (i << shift); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
286 |
6828 | 287 pool->stats[slot].used++; |
288 | |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
289 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
290 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
291 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
292 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
293 |
6827 | 294 mask = ((uintptr_t) 1 << (ngx_pagesize >> shift)) - 1; |
295 mask <<= NGX_SLAB_MAP_SHIFT; | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
296 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
297 for (m = (uintptr_t) 1 << NGX_SLAB_MAP_SHIFT, i = 0; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
298 m & mask; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
299 m <<= 1, i++) |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
300 { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
301 if (page->slab & m) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
302 continue; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
303 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
304 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
305 page->slab |= m; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
306 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
307 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
308 prev = ngx_slab_page_prev(page); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
309 prev->next = page->next; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
310 page->next->prev = page->prev; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
311 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
312 page->next = NULL; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
313 page->prev = NGX_SLAB_BIG; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
314 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
315 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
316 p = ngx_slab_page_addr(pool, page) + (i << shift); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
317 |
6828 | 318 pool->stats[slot].used++; |
319 | |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
320 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
321 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
322 } |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
323 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
324 ngx_slab_error(pool, NGX_LOG_ALERT, "ngx_slab_alloc(): page is busy"); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
325 ngx_debug_point(); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
326 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
327 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
328 page = ngx_slab_alloc_pages(pool, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
329 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
330 if (page) { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
331 if (shift < ngx_slab_exact_shift) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
332 bitmap = (uintptr_t *) ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
333 |
6827 | 334 n = (ngx_pagesize >> shift) / ((1 << shift) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
335 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
336 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
337 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
338 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
339 |
6827 | 340 bitmap[0] = ((uintptr_t) 2 << n) - 1; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
341 |
6827 | 342 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
343 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
344 for (i = 1; i < map; i++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
345 bitmap[i] = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
346 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
347 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
348 page->slab = shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
349 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
350 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
351 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
352 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
353 |
6828 | 354 pool->stats[slot].total += (ngx_pagesize >> shift) - n; |
355 | |
6827 | 356 p = ngx_slab_page_addr(pool, page) + (n << shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
357 |
6828 | 358 pool->stats[slot].used++; |
359 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
360 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
361 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
362 } else if (shift == ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
363 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
364 page->slab = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
365 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
366 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
367 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
368 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
369 |
6828 | 370 pool->stats[slot].total += sizeof(uintptr_t) * 8; |
371 | |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
372 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
373 |
6828 | 374 pool->stats[slot].used++; |
375 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
376 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
377 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
378 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
379 |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
380 page->slab = ((uintptr_t) 1 << NGX_SLAB_MAP_SHIFT) | shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
381 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
382 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
383 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
384 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
385 |
6828 | 386 pool->stats[slot].total += ngx_pagesize >> shift; |
387 | |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
388 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
389 |
6828 | 390 pool->stats[slot].used++; |
391 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
392 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
393 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
394 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
395 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
396 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
397 |
6828 | 398 pool->stats[slot].fails++; |
399 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
400 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
401 |
6480 | 402 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
403 "slab alloc: %p", (void *) p); | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
404 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
405 return (void *) p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
406 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
407 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
408 |
5726
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
409 void * |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
410 ngx_slab_calloc(ngx_slab_pool_t *pool, size_t size) |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
411 { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
412 void *p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
413 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
414 ngx_shmtx_lock(&pool->mutex); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
415 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
416 p = ngx_slab_calloc_locked(pool, size); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
417 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
418 ngx_shmtx_unlock(&pool->mutex); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
419 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
420 return p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
421 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
422 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
423 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
424 void * |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
425 ngx_slab_calloc_locked(ngx_slab_pool_t *pool, size_t size) |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
426 { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
427 void *p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
428 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
429 p = ngx_slab_alloc_locked(pool, size); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
430 if (p) { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
431 ngx_memzero(p, size); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
432 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
433 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
434 return p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
435 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
436 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
437 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
438 void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
439 ngx_slab_free(ngx_slab_pool_t *pool, void *p) |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
440 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
441 ngx_shmtx_lock(&pool->mutex); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
442 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
443 ngx_slab_free_locked(pool, p); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
444 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
445 ngx_shmtx_unlock(&pool->mutex); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
446 } |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
447 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
448 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
449 void |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
450 ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p) |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
451 { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
452 size_t size; |
1018
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
453 uintptr_t slab, m, *bitmap; |
6828 | 454 ngx_uint_t i, n, type, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
455 ngx_slab_page_t *slots, *page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
456 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
457 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, "slab free: %p", p); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
458 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
459 if ((u_char *) p < pool->start || (u_char *) p > pool->end) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
460 ngx_slab_error(pool, NGX_LOG_ALERT, "ngx_slab_free(): outside of pool"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
461 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
462 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
463 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
464 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
465 page = &pool->pages[n]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
466 slab = page->slab; |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
467 type = ngx_slab_page_type(page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
468 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
469 switch (type) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
470 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
471 case NGX_SLAB_SMALL: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
472 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
473 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
474 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
475 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
476 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
477 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
478 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
479 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
480 n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift; |
6827 | 481 m = (uintptr_t) 1 << (n % (sizeof(uintptr_t) * 8)); |
482 n /= sizeof(uintptr_t) * 8; | |
5362
79b9101cecf4
Handling of ngx_int_t != intptr_t case.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4829
diff
changeset
|
483 bitmap = (uintptr_t *) |
79b9101cecf4
Handling of ngx_int_t != intptr_t case.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4829
diff
changeset
|
484 ((uintptr_t) p & ~((uintptr_t) ngx_pagesize - 1)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
485 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
486 if (bitmap[n] & m) { |
6828 | 487 slot = shift - pool->min_shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
488 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
489 if (page->next == NULL) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
490 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
491 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
492 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
493 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
494 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
495 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
496 page->next->prev = (uintptr_t) page | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
497 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
498 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
499 bitmap[n] &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
500 |
6827 | 501 n = (ngx_pagesize >> shift) / ((1 << shift) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
502 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
503 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
504 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
505 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
506 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
507 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
508 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
509 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
510 |
6827 | 511 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
512 |
6828 | 513 for (i = 1; i < map; i++) { |
514 if (bitmap[i]) { | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
515 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
516 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
517 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
518 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
519 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
520 |
6828 | 521 pool->stats[slot].total -= (ngx_pagesize >> shift) - n; |
522 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
523 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
524 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
525 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
526 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
527 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
528 case NGX_SLAB_EXACT: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
529 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
530 m = (uintptr_t) 1 << |
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
531 (((uintptr_t) p & (ngx_pagesize - 1)) >> ngx_slab_exact_shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
532 size = ngx_slab_exact_size; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
533 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
534 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
535 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
536 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
537 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
538 if (slab & m) { |
6828 | 539 slot = ngx_slab_exact_shift - pool->min_shift; |
540 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
541 if (slab == NGX_SLAB_BUSY) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
542 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
543 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
544 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
545 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
546 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
547 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
548 page->next->prev = (uintptr_t) page | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
549 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
550 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
551 page->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
552 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
553 if (page->slab) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
554 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
555 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
556 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
557 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
558 |
6828 | 559 pool->stats[slot].total -= sizeof(uintptr_t) * 8; |
560 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
561 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
562 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
563 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
564 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
565 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
566 case NGX_SLAB_BIG: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
567 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
568 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
569 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
570 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
571 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
572 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
573 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
574 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
575 m = (uintptr_t) 1 << ((((uintptr_t) p & (ngx_pagesize - 1)) >> shift) |
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
576 + NGX_SLAB_MAP_SHIFT); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
577 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
578 if (slab & m) { |
6828 | 579 slot = shift - pool->min_shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
580 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
581 if (page->next == NULL) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
582 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
583 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
584 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
585 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
586 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
587 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
588 page->next->prev = (uintptr_t) page | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
589 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
590 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
591 page->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
592 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
593 if (page->slab & NGX_SLAB_MAP_MASK) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
594 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
595 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
596 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
597 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
598 |
6828 | 599 pool->stats[slot].total -= ngx_pagesize >> shift; |
600 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
601 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
602 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
603 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
604 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
605 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
606 case NGX_SLAB_PAGE: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
607 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
608 if ((uintptr_t) p & (ngx_pagesize - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
609 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
610 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
611 |
6809
87d7e640b45d
Slab: improved double free detection.
Ruslan Ermilov <ru@nginx.com>
parents:
6808
diff
changeset
|
612 if (!(slab & NGX_SLAB_PAGE_START)) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
613 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
614 "ngx_slab_free(): page is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
615 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
616 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
617 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
618 if (slab == NGX_SLAB_PAGE_BUSY) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
619 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
620 "ngx_slab_free(): pointer to wrong page"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
621 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
622 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
623 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
624 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
625 size = slab & ~NGX_SLAB_PAGE_START; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
626 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
627 ngx_slab_free_pages(pool, &pool->pages[n], size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
628 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
629 ngx_slab_junk(p, size << ngx_pagesize_shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
630 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
631 return; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
632 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
633 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
634 /* not reached */ |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
635 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
636 return; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
637 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
638 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
639 |
6828 | 640 pool->stats[slot].used--; |
641 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
642 ngx_slab_junk(p, size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
643 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
644 return; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
645 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
646 wrong_chunk: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
647 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
648 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
649 "ngx_slab_free(): pointer to wrong chunk"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
650 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
651 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
652 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
653 chunk_already_free: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
654 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
655 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
656 "ngx_slab_free(): chunk is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
657 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
658 fail: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
659 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
660 return; |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
661 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
662 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
663 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
664 static ngx_slab_page_t * |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
665 ngx_slab_alloc_pages(ngx_slab_pool_t *pool, ngx_uint_t pages) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
666 { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
667 ngx_slab_page_t *page, *p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
668 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
669 for (page = pool->free.next; page != &pool->free; page = page->next) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
670 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
671 if (page->slab >= pages) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
672 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
673 if (page->slab > pages) { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
674 page[page->slab - 1].prev = (uintptr_t) &page[pages]; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
675 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
676 page[pages].slab = page->slab - pages; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
677 page[pages].next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
678 page[pages].prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
679 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
680 p = (ngx_slab_page_t *) page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
681 p->next = &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
682 page->next->prev = (uintptr_t) &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
683 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
684 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
685 p = (ngx_slab_page_t *) page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
686 p->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
687 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
688 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
689 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
690 page->slab = pages | NGX_SLAB_PAGE_START; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
691 page->next = NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
692 page->prev = NGX_SLAB_PAGE; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
693 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
694 if (--pages == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
695 return page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
696 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
697 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
698 for (p = page + 1; pages; pages--) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
699 p->slab = NGX_SLAB_PAGE_BUSY; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
700 p->next = NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
701 p->prev = NGX_SLAB_PAGE; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
702 p++; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
703 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
704 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
705 return page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
706 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
707 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
708 |
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
709 if (pool->log_nomem) { |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
710 ngx_slab_error(pool, NGX_LOG_CRIT, |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
711 "ngx_slab_alloc() failed: no memory"); |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
712 } |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
713 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
714 return NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
715 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
716 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
717 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
718 static void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
719 ngx_slab_free_pages(ngx_slab_pool_t *pool, ngx_slab_page_t *page, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
720 ngx_uint_t pages) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
721 { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
722 ngx_slab_page_t *prev, *join; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
723 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
724 page->slab = pages--; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
725 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
726 if (pages) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
727 ngx_memzero(&page[1], pages * sizeof(ngx_slab_page_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
728 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
729 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
730 if (page->next) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
731 prev = ngx_slab_page_prev(page); |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
732 prev->next = page->next; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
733 page->next->prev = page->prev; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
734 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
735 |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
736 join = page + page->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
737 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
738 if (join < pool->last) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
739 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
740 if (ngx_slab_page_type(join) == NGX_SLAB_PAGE) { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
741 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
742 if (join->next != NULL) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
743 pages += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
744 page->slab += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
745 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
746 prev = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
747 prev->next = join->next; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
748 join->next->prev = join->prev; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
749 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
750 join->slab = NGX_SLAB_PAGE_FREE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
751 join->next = NULL; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
752 join->prev = NGX_SLAB_PAGE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
753 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
754 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
755 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
756 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
757 if (page > pool->pages) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
758 join = page - 1; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
759 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
760 if (ngx_slab_page_type(join) == NGX_SLAB_PAGE) { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
761 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
762 if (join->slab == NGX_SLAB_PAGE_FREE) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
763 join = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
764 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
765 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
766 if (join->next != NULL) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
767 pages += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
768 join->slab += page->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
769 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
770 prev = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
771 prev->next = join->next; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
772 join->next->prev = join->prev; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
773 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
774 page->slab = NGX_SLAB_PAGE_FREE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
775 page->next = NULL; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
776 page->prev = NGX_SLAB_PAGE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
777 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
778 page = join; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
779 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
780 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
781 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
782 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
783 if (pages) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
784 page[pages].prev = (uintptr_t) page; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
785 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
786 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
787 page->prev = (uintptr_t) &pool->free; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
788 page->next = pool->free.next; |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
789 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
790 page->next->prev = (uintptr_t) page; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
791 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
792 pool->free.next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
793 } |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
794 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
795 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
796 static void |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
797 ngx_slab_error(ngx_slab_pool_t *pool, ngx_uint_t level, char *text) |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
798 { |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
799 ngx_log_error(level, ngx_cycle->log, 0, "%s%s", text, pool->log_ctx); |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
800 } |