[B! malloc] TAKESAKOã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

TAKESAKO id:TAKESAKO

mallocã«é–¢ã™ã‚‹TAKESAKOã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (10)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

ã¨ã‚ã‚‹æ„šç›´ã®ãƒªãƒ‹ã‚¢ã‚µãƒ¼ãƒ - ç¥žæ§˜ãªã‚“ã¦ä¿¡ã˜ãªã„åƒ•ã‚‰ã®ãŸã‚ã«
å‰ã®ã‚¨ãƒ³ãƒˆãƒªã§ç·šå½¢æŽ¢ç´¢ã®ãƒ¡ãƒ¢ãƒªã‚¢ãƒã‚±ãƒ¼ã‚¿ã¯é§„ç›®ã é§„ç›®ã ã€ã¨è¨€ã„ã¾ã—ãŸã€‚ ã§ã€ã¾ãšç·šå½¢æŽ¢ç´¢ã®ä½•ãŒé§„ç›®ã£ã¦ã€ãƒ¡ãƒ¢ãƒªã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ æœ€åˆã¯ã€Œæœªä½¿ç”¨é ˜åŸŸï¼ˆé’ï¼‰ã€ã—ã‹ã‚ã‚Šã¾ã›ã‚“ã€‚ã“ã“ã‹ã‚‰ã©ã†é ˜åŸŸã‚’ã¨ã£ã¦ã‚‚è‰¯ã„ã§ã™ã€‚ ãŸã ã€ä½¿ã£ã¦ã„ãã†ã¡ã«ã€Œä½¿ç”¨é ˜åŸŸï¼ˆèµ¤ï¼‰ã€ã¨ã€Œæœªä½¿ç”¨é ˜åŸŸï¼ˆé’ï¼‰ã€ã®æ•°ç ã¤ãªãŽã«ãªã‚ŠãŒã¡ã§ã™ã€‚ new/deleteã®é †ç•ªã‚’æ„è˜ã™ã‚Œã°ã“ã†ã„ã£ãŸãƒ¡ãƒ¢ãƒªã®é…ç½®å•é¡ŒãŒè§£æ±ºã§ãã‚‹ã“ã¨ã‚‚ã‚ã‚Šã¾ã™ãŒã€ å®Ÿéš›ã«ã¯ã€Œã‚¯ãƒ©ã‚¹ãŒãƒ¡ãƒ¢ãƒªã®çŠ¶æ…‹ã«æŸç¸›ã•ã‚Œã‚‹ã€ã¨ã™ã‚‹ã¨éžå¸¸ã«é¢å€’ã§ã™ã€‚ ãªã®ã§ã€åŠ¹çŽ‡çš„ãªã‚¢ãƒã‚±ãƒ¼ã‚¿ã¯å¿…é ˆãªã®ã§ã™ã€‚ ã‚ãªãŸãŒä¸‹ã®ã‚ˆã†ãªæ–ç‰‡åŒ–ã—ãŸé ˜åŸŸã‚’ã¤ãªãåŒæ–¹å‘ãƒªã‚¹ãƒˆã‚’æŒã£ã¦ã„ã‚‹ã¨ä»®å®šã—ã¦ãã ã•ã„ã€‚ ã“ã“ã‹ã‚‰åŠ¹çŽ‡ã‚ˆããƒ¡ãƒ¢ãƒªã‚’æŽ¢ã™ã“ã¨ã¯çµ¶å¯¾ã«ã§ãã¾ã›ã‚“ã€‚ ã‚½ãƒ¼ãƒˆã—ã¦ãŠãã¨ã„ã£ãŸã“ã¨ã‚‚è€ƒãˆã‚‰ã‚Œã¾ã™ãŒã€ã‚½ãƒ¼ãƒˆã™ã‚‹ã¨è§£æ”¾ã•ã‚ŒãŸé ˜åŸŸã®ãƒžãƒ¼ã‚¸ãŒå›°é›£ã§ã™ã€‚ ï¼ˆfreeã•ã‚ŒãŸéš£æŽ¥ã—ãŸé ˜åŸŸã¯ã‚ˆã‚Šå¤§ããªãƒ¡ãƒ¢ãƒª
TAKESAKO 2009/12/21
ã¨ã‚ã‚‹æ„šç›´ã®ãƒªãƒ‹ã‚¢ã‚µãƒ¼ãƒ dlmalloc

c

malloc
ãƒªãƒ³ã‚¯
ActiveState Community
TAKESAKO 2009/10/15
perl

malloc
ãƒªãƒ³ã‚¯
Google ãŒå…¬é–‹ã—ã¦ã„ã‚‹ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã®è§£èª¬ï¼ˆãã®4ï¼‰- Performance tools -
Google ãŒ Google Code ã§ã‚ªãƒ¼ãƒ—ãƒ³ã‚½ãƒ¼ã‚¹ã¨ã—ã¦å…¬é–‹ã—ã¦ã„ã‚‹ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã®è§£èª¬ã‚·ãƒªãƒ¼ã‚º(å‰å›žã®ã‚¨ãƒ³ãƒˆãƒª)ã®ç¬¬ 4 å›žã§ã™ã€‚ä»Šå›žã¯ Performance tools ã«ã¤ã„ã¦ç´¹ä»‹ã—ã¾ã™ã€‚ã“ã® Performance tools ã¯ã€å®Ÿéš›ã« Google ç¤¾å†…ã§åºƒãä½¿ã‚ã‚Œã¦ãŠã‚Šã€ç‰¹ã«ã€C++ ã§ãƒ†ãƒ³ãƒ—ãƒ¬ãƒ¼ãƒˆã‚’ä½¿ç”¨ã™ã‚‹ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’é–‹ç™ºã™ã‚‹éš›ã«å½¹ç«‹ã¡ã¾ã™ã€‚Linux ç’°å¢ƒã‚’ä¸»ã«å¯¾è±¡ã¨ã—ã¦ã„ã¾ã™ã€‚ Performance tools ã¨ã¯? C ã‚„ C++ ã§ãƒ—ãƒã‚°ãƒ©ãƒ ã®æ›¸ã„ãŸã“ã¨ã®ã‚ã‚‹å¤šãã®äººã¯ã€ã€Œãƒ—ãƒã‚°ãƒ©ãƒ ã‚’é«˜é€ŸåŒ–ã—ãŸã„ã‘ã‚Œã©ã€ã©ã“ãŒä¸€ç•ªã®ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã‹åˆ†ã‹ã‚‰ãªã„ã€ã¨ã‹ã€ã€Œãƒ¡ãƒ¢ãƒªãƒªãƒ¼ã‚¯ãŒã‚ã‚‹ã‚ˆã†ã ã‘ã‚Œã©ã€ã©ã“ã§ç™ºç”Ÿã—ã¦ã„ã‚‹ã‹åˆ†ã‹ã‚‰ãªã„ã€ã¨ã„ã£ãŸå•é¡Œã§è‹¦ã—ã‚ã‚‰ã‚ŒãŸçµŒé¨“ãŒä¸€åº¦ãã‚‰ã„ã¯ã‚ã‚‹ã¨æ€ã„ã¾ã™ã€‚ã‚‚ã¡ã‚ã‚“ã€ã“ã†ã—ãŸå•é¡Œã®è§£æ±ºç–ã¨ã—ã¦ã€ã‚¢ãƒ‰ãƒ›ãƒƒã‚¯ã«ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ãƒ
TAKESAKO 2009/05/12
google

malloc

c++
ãƒªãƒ³ã‚¯
C/C++ã‚»ã‚ãƒ¥ã‚¢ã‚³ãƒ¼ãƒ‡ã‚£ãƒ³ã‚°ã€€å‹•çš„ãƒ¡ãƒ¢ãƒªç®¡ç†ï¼šdlmalloc
C/C++ ã‚»ã‚ãƒ¥ã‚¢ã‚³ãƒ¼ãƒ‡ã‚£ãƒ³ã‚° å‹•çš„ãƒ¡ãƒ¢ãƒªç®¡ç†ï¼šdlmalloc 2010å¹´3æœˆ23æ—¥ JPCERTã‚³ãƒ¼ãƒ‡ã‚£ãƒãƒ¼ã‚·ãƒ§ãƒ³ã‚»ãƒ³ã‚¿ãƒ¼ Japan Computer Emergency Response Team Coordination Center : Japan Computer Emergency Response Team Coordination Center DN : c=JP, st=Tokyo, l=Chiyoda-ku, em ail=office@jpcert.or.jp, o=Japan Computer Emergency Response Team Coordination Center, cn=Japan Computer Emergency Response Team Coordination Center : 2010.03.23 17:53:49 +09'00'
TAKESAKO 2009/05/12
malloc

security
ãƒªãƒ³ã‚¯
ç¬¬2å›žã€€memcachedã®ãƒ¡ãƒ¢ãƒªã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã‚’ç†è§£ã™ã‚‹ | gihyo.jp
æ ªå¼ä¼šç¤¾ãƒŸã‚¯ã‚·ã‚£ ç ”ç©¶é–‹ç™ºã‚°ãƒ«ãƒ¼ãƒ—ã®å‰å‚ã§ã™ã€‚å‰å›žã®è¨˜äº‹ã§memcachedã¯åˆ†æ•£ã«é•·ã‘ãŸé«˜é€Ÿãªã‚ãƒ£ãƒƒã‚·ãƒ¥ã‚µãƒ¼ãƒã§ã‚ã‚‹ã“ã¨ãŒç´¹ä»‹ã•ã‚Œã¾ã—ãŸã€‚ä»Šå›žã¯memcachedã®å†…éƒ¨æ§‹é€ ãŒã©ã†å®Ÿè£…ã•ã‚Œã¦ã„ã‚‹ã®ã‹ã€ãã—ã¦ãƒ¡ãƒ¢ãƒªãŒã©ã†ç®¡ç†ã•ã‚Œã¦ã„ã‚‹ã®ã‹ã‚’ã”ç´¹ä»‹ã—ã¾ã™ã€‚ã¾ãŸã€memcachedã®å†…éƒ¨æ§‹é€ ã®äº‹æƒ…ã«ã‚ˆã‚‹å¼±ç‚¹ã‚‚ç´¹ä»‹ã—ã¾ã™ã€‚ ãƒ¡ãƒ¢ãƒªã‚’æ•´ç†ã—ã¦å†åˆ©ç”¨ã™ã‚‹Slab Allocationãƒ¡ã‚«ãƒ‹ã‚ºãƒ æ˜¨ä»Šã®memcachedã¯ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§Slab Allocatorã¨ã„ã†ãƒ¡ã‚«ãƒ‹ã‚ºãƒ ã‚’ä½¿ã£ã¦ãƒ¡ãƒ¢ãƒªã®ç¢ºä¿ãƒ»ç®¡ç†ã‚’è¡Œã£ã¦ã„ã¾ã™ã€‚ã“ã®ãƒ¡ã‚«ãƒ‹ã‚ºãƒ ãŒç™»å ´ã™ã‚‹ä»¥å‰ã®ãƒ¡ãƒ¢ãƒªç¢ºä¿ã®æˆ¦ç•¥ã¯ã€å˜ç´”ã«ã™ã¹ã¦ã®ãƒ¬ã‚³ãƒ¼ãƒ‰ã«å¯¾ã—ã¦mallocã¨freeã‚’è¡Œã†ã¨ã„ã£ãŸã‚‚ã®ã§ã—ãŸã€‚ã—ãŒã—ãªãŒã‚‰ã€ã“ã®ã‚¢ãƒ—ãƒãƒ¼ãƒã§ã¯ãƒ¡ãƒ¢ãƒªã«ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒ†ãƒ¼ã‚·ãƒ§ãƒ³ï¼ˆæ–ç‰‡åŒ–ï¼‰ã‚’ç™ºç”Ÿã•ã›ã¦ã—ã¾ã„ã€OSã®ãƒ¡ãƒ¢ãƒªãƒžãƒãƒ¼ã‚¸ãƒ£ã«è² è·ã‚’ã‹ã‘ã€æœ€æ‚ªã®å ´åˆã ã¨memcachedã®ãƒ—
TAKESAKO 2008/07/09
å‰å‚å¾¹ï¼ˆã¾ãˆã•ã‹ ã¨ãŠã‚‹ï¼‰ï½‹ï½”ï½‹ï½’

memcached

slab

malloc
ãƒªãƒ³ã‚¯
Windows ã§ Large Page ã¯ã€Œä½¿ãˆã‚‹ã€ã‹ï¼Ÿ - NyaRuRuãŒåœ°çƒã«ã„ãŸã“ã‚
VirtualAlloc ã§å®Ÿé¨“ã—ã¦ã„ãŸãƒã‚¿ã‚‚ã¤ã„ã§ã«æ”¾å‡ºï¼Ž Firefox ç‰ˆ jemalloc ã®ã‚½ãƒ¼ã‚¹ã‚’èªã‚“ã§ã„ã¦ï¼Œãƒ‡ãƒ•ã‚©ãƒ«ãƒˆ chunk size ãŒ 1 MB ã¨æ¯”è¼ƒçš„å¤§ãã‹ã£ãŸã®ã§ï¼Œã€Œãã‚Œãªã‚‰ Large Page å‰²ã‚Šå½“ã¦ã¦ã‚‚è‰¯ã„ã‚“ã˜ã‚ƒãªã‹ã‚ã†ã‹ï¼Ÿã€ã¨èª¿ã¹ã¦ã¿ã¾ã—ãŸï¼Žã‚‚ã£ã¨ã‚‚ï¼Œçµè«–ã‹ã‚‰è¨€ãˆã°ï¼ŒWindows ç’°å¢ƒã® Firefox ã®ãƒ¡ãƒ¢ãƒªã‚¢ãƒã‚±ãƒ¼ã‚¿ã« Large Page ã‚’ä½¿ã†ã®ã¯ï¼Œå…¨ãç¾å®Ÿçš„ã§ã¯ãªã„ã¨ã„ã†ã“ã¨ãŒåˆ†ã‹ã£ãŸã ã‘ã§ã—ãŸãŒï¼Ž Large page support Windows Server 2003 ã‹ã‚‰ï¼Œãƒ¦ãƒ¼ã‚¶ãƒ¼ãƒ¢ãƒ¼ãƒ‰ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã§ã‚‚ large page ãŒä½¿ç”¨ã§ãã‚‹ã‚ˆã†ã«ãªã£ãŸï¼ŽWindows Vista ã§ã‚‚ã‚µãƒãƒ¼ãƒˆã•ã‚Œã‚‹ï¼ŽVirtualAlloc ã« MEM_LARGE_PAGES ãƒ•ãƒ©ã‚°ã‚’ä»˜ã‘ã‚‹ï¼Žlarge page ã®æœ€å°ã‚µã‚¤ã‚ºã¯ GetLa
TAKESAKO 2008/06/17
windows

malloc
ãƒªãƒ³ã‚¯
Linuxãƒ¡ãƒ¢ãƒªç®¡ç†ã®æœ€å…ˆç«¯ã‚’æŽ¢ã‚‹ï¼ˆ1/2ï¼‰ ï¼ ï¼ IT
å°å´Ž è³‡åºƒ 2008/5/22 ã“ã®è¨˜äº‹ã§ã¯ã€Linux Kernel Watchã®ç•ªå¤–ç·¨ã¨ã—ã¦ã€Linuxã®æœ€è¿‘ã®ãƒ¡ãƒ¢ãƒªç®¡ç†å‘¨ã‚Šã®å‹•ãã¨ã€ãã®èƒŒæ™¯ã®ãƒ¢ãƒãƒ™ãƒ¼ã‚·ãƒ§ãƒ³ã«ã¤ã„ã¦ãŠä¼ãˆã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ ãƒ¡ãƒ¢ãƒªç®¡ç†ã¯å¤‰æ›´æ™‚ã®ã‚¤ãƒ³ãƒ‘ã‚¯ãƒˆãŒå¤§ãã„ãŸã‚ã€é€šå¸¸ã€Stable Treeï¼ˆå®‰å®šãƒ„ãƒªãƒ¼ï¼‰ã§ã¯ã‚ã¾ã‚Šå¤‰æ›´ã¯ãªã•ã‚Œã¾ã›ã‚“ã€‚ã—ã‹ã—ã€Linuxã‚«ãƒ¼ãƒãƒ«ãƒ¡ãƒ¼ãƒªãƒ³ã‚°ãƒªã‚¹ãƒˆï¼ˆLKMLï¼‰ã®è°è«–ã§ã¯ã€Œã‚‚ã†ã‚«ãƒ¼ãƒãƒ«2.7ã¯å‡ºãªã„ã€ã¨ã‚‚ã„ã‚ã‚Œã¦ãŠã‚Šã€ååˆ†ãªãƒ†ã‚¹ãƒˆãŒãªã•ã‚ŒãŸã‚‚ã®ã§ã‚ã‚Œã°ã€ã‚¢ã‚°ãƒ¬ãƒƒã‚·ãƒ–ãªãƒ‘ãƒƒãƒã§ã‚‚å—ã‘å…¥ã‚Œã‚‰ã‚Œã‚‹ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ ã¾ãŸã€ãƒ¡ãƒ¢ãƒªã®æ€¥é€Ÿãªå¤§å®¹é‡åŒ–ã«ã‚ˆã‚Šã€ã„ã¾ã¾ã§å•é¡Œã«ãªã‚‰ãªã‹ã£ãŸéƒ¨åˆ†ã«ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“ãƒªãƒ†ã‚£ä¸Šã®å•é¡ŒãŒç™ºç”Ÿã—ãŸã¨ã„ã†å ±å‘Šã‚‚ã¡ã‚‰ã»ã‚‰å‡ºã¦ãã¾ã—ãŸã€‚ãã‚Œã‚’è§£æ¶ˆã™ã‚‹ãŸã‚ã®ã•ã¾ã–ã¾ãªæ”¹å–„ãŒææ¡ˆã•ã‚Œã¦ã„ã¾ã™ã€‚ ã“ã†ã—ãŸèƒŒæ™¯ã«ã‚ˆã‚Šã€2007å¹´ã‹ã‚‰2008å¹´ã«ã‹ã‘ã¦ã¯ç›¸å½“é¢ç™½ã„ãƒ‘ãƒƒãƒãŒå‡ºã¦ãã¾ã—ãŸã€‚
TAKESAKO 2008/05/25
ã“ã®é€£è¼‰ã¯æœŸå¾…ã§ãã‚‹

linux

kernel

memory

malloc
ãƒªãƒ³ã‚¯
é©å‘½ã®æ—¥ã€…ï¼ MALLOC_TRIM_THRESHOLD_ ã¨ MALLOC_MMAP_MAX_ ãƒ‘ãƒ©ãƒ¡ã‚¿ã«ã¤ã„ã¦
ã©ã†ã‚‚ã‚ã¾ã‚Šæœ‰åã§ã¯ãªã„ã‚‰ã—ã„ã®ã§ã€ã“ã“ã§æ›¸ã„ã¦ã¿ã‚‹ã€‚ http://mkosaki.blog46.fc2.com/blog-entry-241.html ã§æ›¸ã„ãŸäº‹ã¨ã»ã¼åŒã˜ã ã‘ã‚Œã©ã€‚ Linuxã«ãŠã„ã¦ã€CPUè² è·ã‚’æ¸¬å®šã™ã‚‹ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã§ã¯ä»¥ä¸‹ã®ç’°å¢ƒå¤‰æ•°ã‚’è¨å®šã™ã‚‹ã¨å¾€ã€…ã«ã—ã¦æ€§èƒ½ãŒã‚ãŒã‚‹ã€‚ % setenv MALLOC_TRIM_THRESHOLD_ -1 % setenv MALLOC_MMAP_MAX_ 0 MALLOC_TRIM_THRESHOLD_ ã¯OSã«æœªä½¿ç”¨ã«ãªã£ãŸãƒ¡ãƒ¢ãƒªã‚’è¿”å´ã™ã‚‹å¥‘æ©Ÿã‚’ã‚ã‚‰ã‚ã—ã¦ã„ã¦ã€ï¼ï¼‘ã¯æ±ºã—ã¦è¿”å´ã—ãªã„äº‹ã‚’è¡¨ã™ã€‚ MALLOC_MMAP_MAX_ ã¯æœ€å¤§mmapæ•°ã§ï¼ã¯æ±ºã—ã¦mmapã›ãšã€ã©ã‚“ãªã«å¤§ããªãƒ¡ãƒ¢ãƒªã§ã‚‚brkã‚’ä½¿ã£ã¦ãƒ¡ãƒ¢ãƒªã‚’å–ã‚‹äº‹ã‚’æ„å‘³ã™ã‚‹ã€‚ ã§ã€æ€§èƒ½ã«åŠ¹ãã®ã¯ï¼ˆãŸã„ã¦ã„ï¼‰MALLOC_MMAP_MAX_ã®ã»ã†ã€‚ glibcã¯ã‚¢ãƒ³ãƒãƒ•ãƒ©ã‚°
TAKESAKO 2008/01/28
linux

kernel

malloc
ãƒªãƒ³ã‚¯
google-perftools(tcmalloc)ã®ä½¿ã„æ–¹ - moratorium
google-perftools(tcmalloc)ã®ä½¿ã„æ–¹ 2007-12-17 (Mon) 22:59 Google OSS PFIã§ã¯æ¯Žé€±ï¼‘äººé©å½“ãªè©±é¡Œã§ç™ºè¡¨ã—ã¦ã„ã‚‹ã®ã§ã™ãŒã€ã“ã®é–“ã€ŒGooglePerfToolsã®ä½¿ã„æ–¹ã€ã¨ã„ã†è»½ã„ãŠé¡Œã§ç™ºè¡¨ã—ãŸè³‡æ–™ã‚’å…¬é–‹ã—ã¦ã¿ã¾ã™ã€‚ãƒ¡ãƒ¢ãƒªå‘¨ã‚Šã®å•é¡Œã¯å¤§å¤‰ã§ã™ã‚ˆãâ€¦ã€‚ google-perftools - Fast, multi-threaded malloc() and nifty performance analysis tools è‚¥ãˆç¶šã‘ã‚‹Tomcatã¨èƒƒã‚’ç—›ã‚ã‚‹ãƒˆãƒ©ãƒ–ãƒ«ãƒãƒƒã‚«ãƒ¼ ãƒãƒ¼ãƒ†ã‚¯ãªãƒ¡ãƒ¢ãƒªä½¿ç”¨é‡ç›£è¦–æ–¹æ³• ç‰¹ã«C++ã§é•·æœŸé‹ç”¨ä¸ã®ãƒ¡ãƒ¢ãƒªãƒªãƒ¼ã‚¯ã«è‹¦ã—ã‚“ã§ãŠã‚‰ã‚Œã‚‹æ–¹ã«ã¯å½¹ç«‹ã¤ã‹ã¨æ€ã„ã¾ã™ã€‚åŸºæœ¬çš„ã«ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã®æ—¥æœ¬èªžè¨³ã§ã™ãŒã€‚SlideShareã ã¨ãªãœã‹å›³ãŒãšã‚Œã‚‹ã®ã§ã€å…ƒãƒ•ã‚¡ã‚¤ãƒ«ã‚’ã“ã¡ã‚‰ã«ç½®ã„ã¦ãŠãã¾ã™ã€‚ | View | Upload
TAKESAKO 2007/12/18
google

malloc
ãƒªãƒ³ã‚¯
jemalloc (#1172213) | Netcraft Web Server èª¿æŸ»çµæžœã€GoogleãŒçªå¦‚ã‚·ã‚§ã‚¢å–å¾— | ã‚¹ãƒ©ãƒ‰
ã‚µãƒ¼ãƒãƒ¼ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã®æ¯”è¼ƒã—ã‹è©±é¡Œã«ã®ã¼ã£ã¦ã„ã¾ã›ã‚“ãŒã€è‰¯ãè€ƒãˆã‚‹ã¨Googleã®ã‚µãƒ¼ãƒãƒ¼ãŒä¸–ç•Œã®å…¨ã¦ã®Webã‚µãƒ¼ãƒãƒ¼ã®ç´„4%ã‚’å ã‚ã‚‹ã¨ã„ã†ã“ã¨ã§ã™ã‚ˆãã€‚1ç¤¾ã ã‘ã§ã“ã“ã¾ã§ã®ã‚·ã‚§ã‚¢ã‚’æŒã£ã¦ã„ã‚‹ã¨ã„ã†ã®ã¯é©šãã¹ãäº‹ã®ã‚ˆã†ã«æ€ã„ã¾ã™ã€‚ Yahoo!ã¯FreeBSDã«accept_filterãªã©ã®å½¢ã§é‚„å…ƒã—ã¦ã„ã¾ã™ã‘ã‚Œã©ã€Googleã‚‚ä½•ã‹ãã†ã„ã†æ´»å‹•ã‚’ã—ã¦ã„ãŸã®ã‹ã—ã‚‰ã‚“ã€‚ã¡ãªã¿ã«ã€accept_filterã¨ã„ã†ã®ã¯ç‰¹å®šã®ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸åˆ—ãŒã‚«ãƒ¼ãƒãƒ«å†…ã§ãƒãƒƒãƒ•ã‚¡ãƒªãƒ³ã‚°ã•ã‚Œã‚‹ã¾ã§acceptã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã®è¿”äº‹ã‚’ã™ã‚‹ã®ã‚’é…ã‚‰ã›ã‚‹ã“ã¨ã§ã€ã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã‚¹ã‚¤ãƒƒãƒã‚’ä½•å›žã‚‚ã™ã‚‹ã“ã¨ã«ã‚ˆã‚‹ã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ã‚’å‰Šæ¸›ã™ã‚‹ã¨ã„ã†æ©Ÿæ§‹ã§ã™ã€‚ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸å…¨ã¦ãŒãƒãƒƒãƒ•ã‚¡ãƒªãƒ³ã‚°ã•ã‚Œã¦ã„ã‚‹ã¨ã€readä¸€ç™ºã§èªã‚ã¾ã™ã‹ã‚‰ãã€‚
TAKESAKO 2007/06/13
å‹‰å¼·ã«ãªã‚Šã¾ã™ ã€Œå®Ÿã¯FreeBSDã«ãŠã„ã¦ã‚‚MySQLã®æ€§èƒ½å‘ä¸Šã¯ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ©ãƒ¼ãŒã‚‚ãŸã‚‰ã—ãŸã‚‚ã®ã§ã¯ãªãã¦ã€mallocã®æ€§èƒ½å‘ä¸Šã ã£ãŸã‚Šã™ã‚‹ã‹ã‚‚ã€

malloc
ãƒªãƒ³ã‚¯
1