[B! kernel] nagachikaã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

nagachika id:nagachika

kernelã«é–¢ã™ã‚‹nagachikaã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (4)

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Linux kernel 3.9 ã®æ–°æ©Ÿèƒ½ SO_REUSEPORT ã‚’è©¦ã—ã¦ã¿ã‚‹ - nigakyã®ãƒ–ãƒã‚°
Linux kernel 3.9 ã®ãƒžãƒ¼ã‚¸ã‚¦ã‚£ãƒ³ãƒ‰ã‚¦ã§ã¯ SO_REUSEPORT ã¨ã„ã†ã‚½ã‚±ãƒƒãƒˆã‚ªãƒ—ã‚·ãƒ§ãƒ³ãŒãƒžãƒ¼ã‚¸ã•ã‚Œã¾ã—ãŸã€‚ Merge branch 'soreuseport' Â· c617f39 Â· torvalds/linux Â· GitHub ã“ã‚Œã¯åŒä¸€ãƒãƒ¼ãƒˆã«è¤‡æ•°ã®ãƒªã‚¹ãƒŠãƒ¼ï¼ˆlisten ã‚½ã‚±ãƒƒãƒˆï¼‰ãŒ bind ã§ãã‚‹ã‚ˆã†ã«ãªã‚‹ã¨ã„ã†ã‚‚ã®ã§ã€Webã‚µãƒ¼ãƒãªã©å˜ä¸€ã®ãƒãƒ¼ãƒˆã«å¤šãã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒæ¥ã‚‹ã‚ˆã†ãªãƒ¯ãƒ¼ã‚¯ãƒãƒ¼ãƒ‰ã§ã€è¤‡æ•°ãƒ—ãƒã‚»ã‚¹ã§ã†ã¾ãè² è·åˆ†æ•£ãŒã§ãã‚‹ã‚ˆã†ã«ãªã‚‹ãã†ã§ã™ã€‚ ï¼ˆã“ã‚Œã¾ã§ã ã¨ä¸€äººãŒaccept()ã—ã¦ãã‚Œãžã‚Œã® worker ã«æ¸¡ã™ã¨ã„ã†ã‚ˆã†ãªãƒ¢ãƒ‡ãƒ«ãŒã‚ã‚Šã¾ã—ãŸãŒã€ã“ã‚Œã§ã¯ accept() ã™ã‚‹éƒ¨åˆ†ãŒãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã«ãªã£ã¦ã—ã¾ã„ãŒã¡ã§ã—ãŸã€‚ï¼‰ BSDã§ã¯å…ƒã€… SO_REUSEPORT ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã¯ã‚ã£ãŸã‚ˆã†ã§ã™ãŒã€ãƒžãƒ«ãƒã‚ãƒ£ã‚¹ãƒˆé€šä¿¡ã§ä½¿ã†ã‚‚ã®ã®ã‚ˆã†ã§ã™ã€‚Linux
nagachika 2013/05/16
linux

kernel

network

development
ãƒªãƒ³ã‚¯
Linux ã®ãƒ—ãƒã‚»ã‚¹ãŒ Copy on Write ã§å…±æœ‰ã—ã¦ã„ã‚‹ãƒ¡ãƒ¢ãƒªã®ã‚µã‚¤ã‚ºã‚’èª¿ã¹ã‚‹
Linux ã¯ fork ã§åãƒ—ãƒã‚»ã‚¹ã‚’ä½œæˆã—ãŸå ´åˆã€è¦ªã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªç©ºé–“ã®å†…å®¹ã‚’åã¸ã‚³ãƒ”ãƒ¼ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ã—ã‹ã—ã¾ã¨ã‚‚ã«å…¨ç©ºé–“ã‚’ã‚³ãƒ”ãƒ¼ã—ã¦ã„ãŸã®ã§ã¯ fork ã®ã‚³ã‚¹ãƒˆãŒé«˜ããªã£ã¦ã—ã¾ã„ã¾ã™ã—ã€åãŒè¦ªã¨åŒã˜ã‚ˆã†ãªãƒ—ãƒã‚»ã‚¹ã¨ã—ã¦å‹•ä½œã—ç¶šã‘ã‚‹å ´åˆã¯ã€å†…å®¹ã®é‡è¤‡ã—ãŸãƒšãƒ¼ã‚¸ãŒå¤šæ•°ã§ãã¦ã—ã¾ã„ã€åŠ¹çŽ‡ãŒã‚ˆãã‚ã‚Šã¾ã›ã‚“ã€‚ ãã“ã§ã€Linux ã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªã¯ã€ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’èˆã‚ã¦ã‚³ãƒ”ãƒ¼ã™ã‚‹ã®ã§ã¯ãªãã€ã¯ã˜ã‚ã¯è¦ªåã§ãƒ¡ãƒ¢ãƒªé ˜åŸŸã‚’å…±æœ‰ã—ã¦ãŠã„ã¦ã€æ›¸ãè¾¼ã¿ãŒã‚ã£ãŸæ™‚ç‚¹ã§ã€ãã®æ›¸ãè¾¼ã¿ã®ã‚ã£ãŸãƒšãƒ¼ã‚¸ã ã‘ã‚’è¦ªåã§å€‹åˆ¥ã«æŒã¤ã¨ã„ã†ä»•çµ„ã¿ã§ã“ã®å•é¡Œã‚’å›žé¿ã—ã¾ã™ã€‚Copy-On-Write (CoW) ã¨å‘¼ã°ã‚Œã‚‹æˆ¦ç•¥ã§ã™ã€‚å…±æœ‰ãƒ¡ãƒ¢ãƒªãƒšãƒ¼ã‚¸ã¯ã€è¦ªåãã‚Œãžã‚Œã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’åŒä¸€ã®ç‰©ç†ãƒ¡ãƒ¢ãƒªã«ãƒžãƒƒãƒ”ãƒ³ã‚°ã™ã‚‹ã“ã¨ã§å®Ÿç¾ã•ã‚Œã¾ã™ã€‚ã‚ˆã‚Šè©³ã—ãã¯ ã‚³ãƒ”ãƒ¼ã‚ªãƒ³ãƒ©ã‚¤ãƒˆ - Wikipedia ãªã©ã‚’å‚ç…§ã—ã¦ãã ã•ã„ã€‚ ã“ã® CoW ã«
nagachika 2008/03/09
linux

kernel

programming
ãƒªãƒ³ã‚¯
ã‚ãƒ¼ãƒœãƒ¼ãƒ‰ãƒªãƒžãƒƒãƒ‘ãƒ¼ã‹ã‚‰è¦‹ã‚‹ Mac OS X ã®ã‚«ãƒ¼ãƒãƒ«æ‹¡å¼µã®ä½œã‚Šæ–¹
IOHIDSystem ã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã¯ IOHIDFamily ã«å«ã¾ã‚Œã¦ãŠã‚Šã€ _KeyboardEventAction ã«ãƒ•ãƒƒã‚¯ã‚’ä»•è¾¼ã‚€ã«ã¯ IOHIKeyboard.cppã€ IOHIKeyboard.h ã‚’ã‚ãŸã‚Šã¾ã™ã€‚ // IOHIKeyboard.h class IOHIKeyboard : public IOHIDevice { ... OSObject * _keyboardEventTarget; KeyboardEventAction _keyboardEventAction; OSObject * _keyboardSpecialEventTarget; KeyboardSpecialEventAction _keyboardSpecialEventAction; OSObject * _updateEventFlagsTarget; UpdateEventFlag
nagachika 2007/11/02
mac

kernel

programming

ã‚ã¨ã§èªã‚€
ãƒªãƒ³ã‚¯
naoyaã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼ - sched_setaffinity(2) ã‚’ä½¿ã£ã¦ä»»æ„ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ä»»æ„ã®CPUä¸Šã§å‹•ã‹ã™
Linux 2.6 ã«ã¯ sched_setaffinity(2) ã¨ã„ã†ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ãŒã‚ã‚Šã€ã“ã‚Œã‚’åˆ©ç”¨ã—ã¦ä»»æ„ã®ã‚¹ãƒ¬ãƒƒãƒ‰ã‚’(ãƒžãƒ«ãƒCPUç’°å¢ƒä¸‹ã§)ç‰¹å®šã® CPU ã§å®Ÿè¡Œã•ã›ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚http://www-06.ibm.com/jp/developerworks/linux/051028/j_l-affinity.shtmlã€€ã«ã‚ˆã‚‹ã¨ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ ãƒ—ãƒã‚»ã‚¹ã§ãƒžãƒãƒ¼ã‚¸ãƒ£ã¨ãªã‚‹ã‚¹ãƒ¬ãƒƒãƒ‰ã‚’ã“ã®ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã§ç‰¹å®šã® CPU ã«å›ºå®šã™ã‚‹...ã¨ã„ã£ãŸå¿œç”¨ãŒè€ƒãˆã‚‰ã‚Œã‚‹ãã†ã§ã™ã€‚ ã¸ãˆã€ã¨æ€ã£ãŸã®ã§ã¡ã‚‡ã£ã¨éŠã‚“ã§ã¿ã¾ã—ãŸã€‚LD_PRELOAD ã‚’ä½¿ã£ã¦ä»»æ„ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ä»»æ„ã® CPU ã«å›ºå®šã—ã¦å‹•ã‹ã—ã¦ã¿ã¾ã™ã€‚GCC ã® __attribute__)((constructor))( ã§ sched_setaffinitiy(2) ã‚’å‘¼ã³ã¾ã™ã€‚(å‚è€ƒ: http://0xcc.net/blog/
nagachika 2007/09/05
kernel

linux
ãƒªãƒ³ã‚¯
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