Mercurial > hg > nginx
annotate src/core/ngx_palloc.c @ 2917:62010fa37ead
try to reuse last 4 free large allocation links
this fixes a pool growing for multi-requests keepalive connections
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 03 Jun 2009 13:57:28 +0000 |
| parents | 3a8a53c0c42f |
| children | cb7d05c097db |
| rev | line source |
|---|---|
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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10 |
| 2049 | 11 static void *ngx_palloc_block(ngx_pool_t *pool, size_t size); |
| 12 static void *ngx_palloc_large(ngx_pool_t *pool, size_t size); | |
| 13 | |
| 14 | |
| 501 | 15 ngx_pool_t * |
| 16 ngx_create_pool(size_t size, ngx_log_t *log) | |
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17 { |
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18 ngx_pool_t *p; |
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19 |
| 501 | 20 p = ngx_alloc(size, log); |
| 21 if (p == NULL) { | |
| 527 | 22 return NULL; |
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23 } |
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24 |
| 2049 | 25 p->d.last = (u_char *) p + sizeof(ngx_pool_t); |
| 26 p->d.end = (u_char *) p + size; | |
| 27 p->d.next = NULL; | |
| 28 | |
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29 size = size - sizeof(ngx_pool_t); |
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30 p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL; |
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31 |
| 581 | 32 p->current = p; |
| 33 p->chain = NULL; | |
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34 p->large = NULL; |
| 509 | 35 p->cleanup = NULL; |
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36 p->log = log; |
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37 |
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38 return p; |
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39 } |
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40 |
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41 |
| 501 | 42 void |
| 43 ngx_destroy_pool(ngx_pool_t *pool) | |
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44 { |
| 509 | 45 ngx_pool_t *p, *n; |
| 46 ngx_pool_large_t *l; | |
| 47 ngx_pool_cleanup_t *c; | |
| 48 | |
| 49 for (c = pool->cleanup; c; c = c->next) { | |
| 50 if (c->handler) { | |
| 1744 | 51 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
| 52 "run cleanup: %p", c); | |
| 509 | 53 c->handler(c->data); |
| 54 } | |
| 55 } | |
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56 |
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57 for (l = pool->large; l; l = l->next) { |
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58 |
| 461 | 59 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc); |
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60 |
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61 if (l->alloc) { |
| 477 | 62 ngx_free(l->alloc); |
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63 } |
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64 } |
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65 |
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66 #if (NGX_DEBUG) |
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67 |
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68 /* |
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69 * we could allocate the pool->log from this pool |
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70 * so we can not use this log while the free()ing the pool |
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71 */ |
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72 |
| 2049 | 73 for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { |
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74 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
| 2049 | 75 "free: %p, unused: %uz", p, p->d.end - p->d.last); |
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76 |
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77 if (n == NULL) { |
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78 break; |
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79 } |
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80 } |
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81 |
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82 #endif |
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83 |
| 2049 | 84 for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { |
| 477 | 85 ngx_free(p); |
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87 if (n == NULL) { |
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88 break; |
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89 } |
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90 } |
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91 } |
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93 |
| 2337 | 94 void |
| 95 ngx_reset_pool(ngx_pool_t *pool) | |
| 96 { | |
| 97 ngx_pool_t *p; | |
| 98 ngx_pool_large_t *l; | |
| 99 | |
| 100 for (l = pool->large; l; l = l->next) { | |
| 101 if (l->alloc) { | |
| 102 ngx_free(l->alloc); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 pool->large = NULL; | |
| 107 | |
| 108 for (p = pool; p; p = p->d.next) { | |
| 109 p->d.last = (u_char *) p + sizeof(ngx_pool_t); | |
| 110 } | |
| 111 } | |
| 112 | |
| 113 | |
| 501 | 114 void * |
| 115 ngx_palloc(ngx_pool_t *pool, size_t size) | |
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116 { |
| 2049 | 117 u_char *m; |
| 118 ngx_pool_t *p; | |
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119 |
| 2049 | 120 if (size <= pool->max) { |
| 121 | |
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122 p = pool->current; |
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123 |
| 2049 | 124 do { |
| 125 m = ngx_align_ptr(p->d.last, NGX_ALIGNMENT); | |
| 589 | 126 |
| 2049 | 127 if ((size_t) (p->d.end - m) >= size) { |
| 128 p->d.last = m + size; | |
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129 |
| 2049 | 130 return m; |
| 589 | 131 } |
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132 |
| 2049 | 133 p = p->d.next; |
| 134 | |
| 135 } while (p); | |
| 136 | |
| 137 return ngx_palloc_block(pool, size); | |
| 138 } | |
| 139 | |
| 140 return ngx_palloc_large(pool, size); | |
| 141 } | |
| 142 | |
| 143 | |
| 144 void * | |
| 145 ngx_pnalloc(ngx_pool_t *pool, size_t size) | |
| 146 { | |
| 147 u_char *m; | |
| 148 ngx_pool_t *p; | |
| 149 | |
| 150 if (size <= pool->max) { | |
| 151 | |
| 152 p = pool->current; | |
| 153 | |
| 154 do { | |
| 155 m = p->d.last; | |
| 156 | |
| 157 if ((size_t) (p->d.end - m) >= size) { | |
| 158 p->d.last = m + size; | |
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159 |
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160 return m; |
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161 } |
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162 |
| 2049 | 163 p = p->d.next; |
| 164 | |
| 165 } while (p); | |
| 166 | |
| 167 return ngx_palloc_block(pool, size); | |
| 168 } | |
| 169 | |
| 170 return ngx_palloc_large(pool, size); | |
| 171 } | |
| 172 | |
| 581 | 173 |
| 2049 | 174 static void * |
| 175 ngx_palloc_block(ngx_pool_t *pool, size_t size) | |
| 176 { | |
| 177 u_char *m; | |
| 2055 | 178 size_t psize; |
| 2049 | 179 ngx_pool_t *p, *new, *current; |
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180 |
| 2055 | 181 psize = (size_t) (pool->d.end - (u_char *) pool); |
| 182 | |
| 2056 | 183 m = ngx_alloc(psize, pool->log); |
| 184 if (m == NULL) { | |
| 2049 | 185 return NULL; |
| 186 } | |
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187 |
| 2056 | 188 new = (ngx_pool_t *) m; |
| 189 | |
| 190 new->d.end = m + psize; | |
| 2055 | 191 new->d.next = NULL; |
| 192 | |
| 2056 | 193 m += sizeof(ngx_pool_data_t); |
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194 m = ngx_align_ptr(m, NGX_ALIGNMENT); |
| 2056 | 195 new->d.last = m + size; |
| 196 | |
| 2049 | 197 current = pool->current; |
| 198 | |
| 199 for (p = current; p->d.next; p = p->d.next) { | |
| 200 if ((size_t) (p->d.end - p->d.last) < NGX_ALIGNMENT) { | |
| 201 current = p->d.next; | |
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202 } |
| 2049 | 203 } |
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204 |
| 2049 | 205 p->d.next = new; |
| 206 | |
| 207 pool->current = current ? current : new; | |
| 581 | 208 |
| 2049 | 209 return m; |
| 210 } | |
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211 |
| 2049 | 212 |
| 213 static void * | |
| 214 ngx_palloc_large(ngx_pool_t *pool, size_t size) | |
| 215 { | |
| 216 void *p; | |
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217 ngx_uint_t n; |
| 2049 | 218 ngx_pool_large_t *large; |
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219 |
| 501 | 220 p = ngx_alloc(size, pool->log); |
| 221 if (p == NULL) { | |
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222 return NULL; |
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223 } |
| 2129 | 224 |
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225 n = 0; |
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226 |
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227 for (large = pool->large; large; large = large->next) { |
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228 if (large->alloc == NULL) { |
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229 large->alloc = p; |
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230 return p; |
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231 } |
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232 |
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233 if (n++ > 3) { |
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234 break; |
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235 } |
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236 } |
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237 |
| 2129 | 238 large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); |
| 239 if (large == NULL) { | |
| 240 ngx_free(p); | |
| 241 return NULL; | |
| 242 } | |
| 243 | |
| 244 large->alloc = p; | |
| 245 large->next = pool->large; | |
| 246 pool->large = large; | |
| 247 | |
| 248 return p; | |
| 249 } | |
| 250 | |
| 251 | |
| 252 void * | |
| 253 ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment) | |
| 254 { | |
| 255 void *p; | |
| 256 ngx_pool_large_t *large; | |
| 257 | |
| 258 p = ngx_memalign(alignment, size, pool->log); | |
| 259 if (p == NULL) { | |
| 260 return NULL; | |
| 261 } | |
|
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262 |
| 629 | 263 large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); |
| 264 if (large == NULL) { | |
| 1317 | 265 ngx_free(p); |
| 629 | 266 return NULL; |
|
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267 } |
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268 |
|
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269 large->alloc = p; |
| 629 | 270 large->next = pool->large; |
| 271 pool->large = large; | |
|
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272 |
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273 return p; |
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274 } |
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275 |
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276 |
| 501 | 277 ngx_int_t |
| 278 ngx_pfree(ngx_pool_t *pool, void *p) | |
|
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279 { |
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280 ngx_pool_large_t *l; |
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281 |
|
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282 for (l = pool->large; l; l = l->next) { |
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283 if (p == l->alloc) { |
|
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284 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
| 461 | 285 "free: %p", l->alloc); |
| 477 | 286 ngx_free(l->alloc); |
|
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287 l->alloc = NULL; |
|
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288 |
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289 return NGX_OK; |
|
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290 } |
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291 } |
|
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292 |
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293 return NGX_DECLINED; |
|
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294 } |
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295 |
|
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296 |
| 501 | 297 void * |
| 298 ngx_pcalloc(ngx_pool_t *pool, size_t size) | |
|
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299 { |
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300 void *p; |
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301 |
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302 p = ngx_palloc(pool, size); |
|
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303 if (p) { |
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304 ngx_memzero(p, size); |
|
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305 } |
|
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306 |
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307 return p; |
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308 } |
|
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309 |
| 509 | 310 |
| 311 ngx_pool_cleanup_t * | |
| 563 | 312 ngx_pool_cleanup_add(ngx_pool_t *p, size_t size) |
| 509 | 313 { |
| 314 ngx_pool_cleanup_t *c; | |
| 315 | |
| 316 c = ngx_palloc(p, sizeof(ngx_pool_cleanup_t)); | |
| 317 if (c == NULL) { | |
| 318 return NULL; | |
| 319 } | |
| 320 | |
| 563 | 321 if (size) { |
| 322 c->data = ngx_palloc(p, size); | |
| 323 if (c->data == NULL) { | |
| 324 return NULL; | |
| 325 } | |
| 326 | |
| 327 } else { | |
| 328 c->data = NULL; | |
| 329 } | |
| 330 | |
| 331 c->handler = NULL; | |
| 509 | 332 c->next = p->cleanup; |
| 333 | |
| 334 p->cleanup = c; | |
| 335 | |
| 563 | 336 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, p->log, 0, "add cleanup: %p", c); |
| 337 | |
| 509 | 338 return c; |
| 339 } | |
| 340 | |
| 341 | |
| 342 void | |
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343 ngx_pool_run_cleanup_file(ngx_pool_t *p, ngx_fd_t fd) |
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344 { |
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345 ngx_pool_cleanup_t *c; |
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346 ngx_pool_cleanup_file_t *cf; |
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347 |
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348 for (c = p->cleanup; c; c = c->next) { |
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349 if (c->handler == ngx_pool_cleanup_file) { |
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350 |
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351 cf = c->data; |
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352 |
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353 if (cf->fd == fd) { |
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354 c->handler(cf); |
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355 c->handler = NULL; |
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356 return; |
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357 } |
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358 } |
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359 } |
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360 } |
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361 |
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362 |
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363 void |
| 509 | 364 ngx_pool_cleanup_file(void *data) |
| 365 { | |
| 366 ngx_pool_cleanup_file_t *c = data; | |
| 367 | |
| 1744 | 368 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d", |
| 369 c->fd); | |
| 563 | 370 |
| 509 | 371 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
| 372 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, | |
| 373 ngx_close_file_n " \"%s\" failed", c->name); | |
| 374 } | |
| 375 } | |
| 376 | |
| 377 | |
|
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378 void |
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379 ngx_pool_delete_file(void *data) |
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380 { |
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381 ngx_pool_cleanup_file_t *c = data; |
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382 |
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383 ngx_err_t err; |
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384 |
| 1744 | 385 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d %s", |
| 386 c->fd, c->name); | |
|
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387 |
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388 if (ngx_delete_file(c->name) == NGX_FILE_ERROR) { |
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389 err = ngx_errno; |
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390 |
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391 if (err != NGX_ENOENT) { |
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392 ngx_log_error(NGX_LOG_CRIT, c->log, err, |
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393 ngx_delete_file_n " \"%s\" failed", c->name); |
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394 } |
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395 } |
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396 |
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397 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
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398 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
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399 ngx_close_file_n " \"%s\" failed", c->name); |
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400 } |
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401 } |
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402 |
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403 |
|
346
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404 #if 0 |
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405 |
| 501 | 406 static void * |
| 407 ngx_get_cached_block(size_t size) | |
|
346
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nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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408 { |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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409 void *p; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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410 ngx_cached_block_slot_t *slot; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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411 |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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412 if (ngx_cycle->cache == NULL) { |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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413 return NULL; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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414 } |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
415 |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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416 slot = &ngx_cycle->cache[(size + ngx_pagesize - 1) / ngx_pagesize]; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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417 |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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418 slot->tries++; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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419 |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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420 if (slot->number) { |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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421 p = slot->block; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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422 slot->block = slot->block->next; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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423 slot->number--; |
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55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
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424 return p; |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
425 } |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
426 |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
427 return NULL; |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
428 } |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
429 |
|
55e496a8ece3
nginx-0.0.3-2004-06-06-23:49:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
430 #endif |