Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

LinuxÄÚ´æ¹ÜÀíÖ®slab·ÖÅäÆ÷·ÖÎö(ÐøÎå)

 ¾Å£º¼¸µã²¹³ä£º
1: SlabÖÐʹÓõÄÒ³Ãæ¶¼»á¼ÓÉÏ“PG_slab”±êÖ¾£¬ÒÔ¸úÒ»°ãµÄÒ³ÃæÇø±ð¡£ÁíÍ⣬ÔÚÊÍ·ÅÄÚ´æµÄʱºò£¬¾­³£ÐèÒªÓõ½´ÓÒ³Ãæµ½slabµÄ¶ÔӦת»»¹ØÏµ¡£ÄÇÊÇÔõÑù±êʶµÄÄØ£¿
¹ØÓÚ±êÖ¾£º
×¢ÒâÓÐÒÔÏ´úÂ룺
static void *kmem_getpages(kmem_cache_t *cachep, int flags, int nodeid)
{
     ……
     while (i--) {
         //Ϊ·ÖµÃµÄÿһ¸öÒ³ÃæÉèÖÃPG_slab±êÖ¾
         SetPageSlab(page);
         page++;
     }
……
}
¹ØÓÚ´ÓÒ³Ãæµ½slabµÄת»»£º
  Ïò»ï°éϵͳÇëÇóÄÚ´æ
static int cache_grow (kmem_cache_t * cachep, int flags)
{
     ……
     //ÇëÇóÄÚ´æ¹ýºó£¬ÉèÖÃÄÚ´æÊôÐÔ
set_slab_attr(cachep, slabp, objp);
……
}
static void set_slab_attr(kmem_cache_t *cachep, struct slab *slabp, void *objp)
{
     int i;
     struct page *page;
     //¼ÆËãÒ³Ãæ×ÜÊý
     i = 1 << cachep->gfporder;
     //ÐéÄâµØÖ·×ª»»³ÉÏàÓ¦Ò³Ãæ
     page = virt_to_page(objp);
     do {
         // #define    SET_PAGE_CACHE(pg,x)  ((pg)->lru.next = (struct list_head *)(x))
         SET_PAGE_CACHE(page, cachep);
         #define  SET_PAGE_SLAB(pg,x)   ((pg)->lru.prev = (struct list_head *)(x))
         SET_PAGE_SLAB(page, slabp);
         page++;
     } while (--i);
}
´ÓÉÏÃæµÄº¯


Ïà¹ØÎĵµ£º

linux·þÎñÆ÷ÓÃlighttpd+mysql5+php5+SupeSite/X

Ò»¡¢°²×°ÏµÍ³»·¾³
1¡¢ÏµÍ³£ºcentos5
2¡¢²âÊÔÔÚvm5.5
×¼±¸Èí¼þ
lighttpd-1.4.18
ÏÂÔØµØÖ·
mysql-5.0.41
part1ÏÂÔØµØÖ·
part2ÏÂÔØµØÖ·
part3ÏÂÔØµØÖ·
php-5.2.3
ÏÂÔØµØÖ·
SupeSite/X-Space
part1ÏÂÔØµØÖ·
part2ÏÂÔØµØÖ·
part3ÏÂÔØµØÖ·
discuz
ÏÂÔØµØÖ·
¶þ¡¢´î½¨web·þÎñÆ÷°²×°¹ý³Ì
1¡¢mysql5°²×°
$ tar zx ......

Linuxϵͳ³ÌÐòÆô¶¯Òýµ¼¹ý³ÌÏêϸÆÊÎö

 LinuxµÄÒ»¸öÎüÒýÈ˵ÄÌØÐÔ¾ÍÊÇÓû§¿ÉÒÔ×ÔÐж¨ÖÆÕû¸öϵͳ£¬Äã¿ÉÊÇÔËÐÐÒ»¸öÖ»ÓÐ1MµÄ“ÃÔÄã”Linux£¬Ò²¿ÉÒÔÔËÐÐÒ»¸ö¼¸GµÄÇ¿´óLinux¡£¶øÎÞÂÛÄãÔËÐÐÔõÑùµÄLinux£¬Äã¶¼ÊÇÏÈ´ÓÒýµ¼³ÌÐò¿ªÊ¼ÔËÐеġ£¶ÔÓÚÆÕͨÓû§£¬´ó¶à¶¼ÊÇÔÚ¸öÈ˵çÄÔÉÏÔËÐÐLinuxµÄ¡£
¡¡¡¡¸öÈ˵çÄÔ£¬ÓÖ½ÐPC»ú£¬ÊÇÎÒÃdz£¼ûµÄʹÓÃIntel»òAMDµÄоƬµÄµç ......

Linux±ØÑ§µÄ60¸öÃüÁî (ת)

inux±ØÑ§µÄ60¸öÃüÁî
LinuxÌṩÁË´óÁ¿µÄÃüÁÀûÓÃËü¿ÉÒÔÓÐЧµØÍê³É´óÁ¿µÄ¹¤×÷£¬Èç´ÅÅ̲Ù×÷¡¢Îļþ´æÈ¡¡¢Ä¿Â¼²Ù×÷¡¢½ø³Ì¹ÜÀí¡¢ÎļþȨÏÞÉ趨µÈ¡£ËùÒÔ£¬ÔÚLinuxϵͳÉϹ¤×÷Àë²»¿ªÊ¹ÓÃϵͳÌṩµÄÃüÁî¡£ÒªÏëÕæÕýÀí½âLinuxϵͳ£¬¾Í±ØÐë´ÓLinuxÃüÁîѧÆð£¬Í¨¹ý»ù´¡µÄÃüÁîѧϰ¿ÉÒÔ½øÒ»²½Àí½âLinuxϵͳ¡£
²»Í¬Linux·¢ÐаæµÄÃüÁîÊýÁ¿² ......

LinuxÄÚ´æ¹ÜÀíÖ®slab·ÖÅäÆ÷·ÖÎö(ÐøÈý)

Áù£ºkmem_cache_allocµÄʵÏÖ·ÖÎö:
ÎÒÃÇÔÚÉÏÃæ¿ÉÒÔ¿´µ½£¬´´½¨Ò»¸öcacheÃèÊö·ûµÄʱºò£¬²¢Ã»ÓÐÕâÖ®·ÖÅäslabÊý¾Ý¡£ÏÖÔÚÎÒÃÇÀ´¿´Ò»ÏÂÔõô´ÓcacheÖÐÉêÇë¶ÔÏó
void * kmem_cache_alloc (kmem_cache_t *cachep, int flags)
{
     return __cache_alloc(cachep, flags);
}
ʵ¼ÊÉÏ»áµ÷ÓÃ__cache_allo ......

LinuxÄÚ´æ¹ÜÀíÖ®slab·ÖÅäÆ÷·ÖÎö(ÐøËÄ)


Æß£ºkmem_cache_free£¨£©µÄʵÏÖ
kmem_cache_freeÓÃÓÚ°Ñ´ÓslabÖзÖÅäµÄ¶ÔÏóÊͷŵô£¬Í¬·ÖÅäÒ»Ñù£¬ËüÊ×ÏÈ»á°ÑËü·Åµ½ACÖУ¬Èç¹ûACÂúÁË£¬Ôò°Ñ¶ÔÏóÊͷŵ½shareÁ´ÖУ¬Èç¹ûshareÒ²ÂúÁË£¬Ò²¾Í°ÑËüÊÍ·ÅÖÁslab¡£À´¿´¾ßÌåµÄ´úÂ룺
void kmem_cache_free (kmem_cache_t *cachep, void *objp)
{
     unsi ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ