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

cubicdaiya id:cubicdaiya

kernelã«é–¢ã™ã‚‹cubicdaiyaã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (9)

${{author_name}}$

{{{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}}

hiboma/kernel/net/net-backlog.md at master Â· hiboma/hiboma
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
cubicdaiya 2015/04/27
tcp

sysctl

kernel
ãƒªãƒ³ã‚¯
é–ç§’ã‚’è¿Žãˆã‚‹ã«ã‚ãŸã£ã¦Linuxã§ã¯ä½•ã‚’å¯¾ç–ã™ã¹ãã‹ï¼Ÿ | Act as Professional
2016/12/27 æ›´æ–° Googleãªã©ã®å¤§æ‰‹ITä¼æ¥ãŒã†ã‚‹ã†ç§’å¯¾ç–æ¸ˆã®NTPã‚µãƒ¼ãƒãŒå…¬é–‹ã—ãŸãŸã‚ã€ã“ã‚Œã‚’åˆ©ç”¨ã™ã‚‹å†…å®¹ãªã©ã‚’ä»¥ä¸‹ã«ã¾ã¨ã‚ã¾ã—ãŸã€‚ å…ƒæ—¦ã«å®Ÿæ–½ã•ã‚Œã‚‹ ã†ã‚‹ã†ç§’ã®å¯¾ç– ã¾ã¨ã‚ 2016/07/08 æ›´æ–° 2017/1/1ã«é–ç§’ã®å®Ÿæ–½ãŒæ±ºå®šã•ã‚Œã¾ã—ãŸã€‚å¯¾å¿œã¯ã“ã®è¨˜äº‹ã®ã¨ãŠã‚Šã§å•é¡Œãªã•ãã†ã§ã™ã€‚ 2015/06/24 æƒ…å ±è¿½åŠ (2015/06/29 æ›´æ–°) ä¸‹è¨˜ã®å¯¾å¿œã«é–¢ã‚ã‚‹ntpdã®æ¯”è¼ƒçš„æ–°ã—ã„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã«SLEWãƒ¢ãƒ¼ãƒ‰ã§å‹•ä½œã—ã¦ã„ã¦ã‚‚ã€ã†ã‚‹ã†ç§’ãŒæŒ¿å…¥ã•ã‚Œã‚‹ãƒã‚°ãŒç™ºè¦‹ã•ã‚Œã¾ã—ãŸã€‚[redhat] ã“ã‚Œã«ã‚ˆã‚Šntp-4.2.8p3-RC1ä»¥é™ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã§ãªã„ã¨SLEWãƒ¢ãƒ¼ãƒ‰ã§å‹•ä½œã—ã¦ã„ã¦ã‚‚ã†ã‚‹ã†ç§’ãŒæŒ¿å…¥ã•ã‚Œã¾ã™ã€‚RedHatã¯ntp-4.2.6p5-3.el6_6ã¨ã„ã†å¯¾å¿œæ¸ˆã¿ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚’æä¾›ã—ã¦ã„ã¾ã™ã€‚Ubuntuã§ã¯ä»Šæ—¥ç¾åœ¨12.04LTS, 14.04LTSã®ï¼’ãƒãƒ¼ã‚¸
cubicdaiya 2015/01/09
linux

kernel

ntp

ã†ã‚‹ã†ç§’
ãƒªãƒ³ã‚¯
SO_REUSEPORT ã‚½ã‚±ãƒƒãƒˆã‚ªãƒ—ã‚·ãƒ§ãƒ³ - æ—¥ã€…æ˜¯é›éŒ¬
Linux Kernel3.9(BSDã§ã¯å‰²ã¨ä»¥å‰ã‹ã‚‰å®Ÿè£…ã•ã‚Œã¦ã„ãŸã‘ã©)ã§å–ã‚Šè¾¼ã¾ã‚ŒãŸSO_REUSEPORTã‚½ã‚±ãƒƒãƒˆã‚ªãƒ—ã‚·ãƒ§ãƒ³ã¯ã€ç•°ãªã‚‹ãƒ—ãƒã‚»ã‚¹ã§åŒä¸€ã®ãƒãƒ¼ãƒˆã«bindã§ãã‚‹ã‚ˆã†ã«ãªã‚‹ã®ã§ã€ã„ã‚ã„ã‚ãŠã‚‚ã—ã‚ã„ã“ã¨ãŒã§ããã†ã€‚ https://lwn.net/Articles/542629/ ã“ã‚ŒãŒmerge commit https://git.kernel.org/cg it/linux/kernel/git/stable/linux-stable.git/commit/?id=c617f398edd4db2b8567a28e899a88f8f574798d è©¦ã—ã«Rubyã§SO_REUSEPORTã‚’ä½¿ã†ã‚µãƒ¼ãƒã‚’æ›¸ã„ã¦ã¿ãŸã€‚ ã‚‚ã¡ã‚ã‚“Kernelã‚’3.9ä»¥é™ã«ã‚¢ãƒƒãƒ—ãƒ‡ãƒ¼ãƒˆã—ãªã„ã¨å‹•ã‹ãªã„ã€‚ Ubuntuã ã¨ã€scriptæ›¸ã„ã¦ãã‚Œã¦ã‚‹äººãŒã„ã‚‹ã®ã§æ¥½ã«Ubuntu Kernelã‚’ã‚¢ãƒƒãƒ—ãƒ‡
cubicdaiya 2015/01/07
socket

kernel
ãƒªãƒ³ã‚¯
C10Kå•é¡Œã®ä»Šã¨æœªæ¥ - genieeâ€™s tech blog
å”çªã§ã™ãŒã€ä¸€å›žç›®ã®è¨˜äº‹ã‚’æ›¸ãã¾ã™ï¼ ä»Šå›žã¯ã€ä¸»ã«ã‚¦ã‚§ãƒ–ã‚µãƒ¼ãƒãƒ¼ã€å…·ä½“çš„ã«ã¯Linuxã®SO_REUSEPORTï¼ˆãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã¨ã—ã¦ã¯Cè¨€èªž)ã®è©±é¡Œã«ãªã‚Šã¾ã™ã€‚èƒŒæ™¯ã¨ã—ã¦ã€å¼Šç¤¾ã§ã¯ã€åºƒå‘Šé…ä¿¡ãŒã„ã‚ã‚†ã‚‹ãƒã‚¤ãƒ†ã‚£ãƒ–ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã§ã‚ã‚‹ãŸã‚ã€ã‚¦ã‚§ãƒ–ã‚µãƒ¼ãƒãƒ¼ã®é–‹ç™ºã‚’è¡Œã£ã¦ã„ã‚‹ã¨ã„ã£ãŸã“ã¨ãŒæŒ™ã’ã‚‰ã‚Œã¾ã™ã€‚ãã‚‚ãã‚‚ä»Šå›žã®è¨˜äº‹ã‚’æ›¸ã„ãŸãã£ã‹ã‘ã¯ã€å¼Šç¤¾ã§SO_REUSEPORTã‚’ä½¿ç”¨ã—å§‹ã‚ã¦ãŠã‚Šã€ãã‚Œã«ã¤ã„ã¦ç´¹ä»‹ã—ãŸã„ã¨è€ƒãˆãŸã‹ã‚‰ã§ã™ã€‚ ç‰¹ã«C10Kå•é¡Œã«ã¤ã„ã¦ã¯ TheC10kProbl em - ã€ŒC10Kå•é¡Œã€ï¼ˆã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆ1ä¸‡å°å•é¡Œï¼‰ã¨ã¯ã€ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã®æ€§èƒ½ä¸Šã¯å•é¡ŒãŒãªãã¦ã‚‚ã€ã‚ã¾ã‚Šã«ã‚‚ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã®æ•°ãŒå¤šããªã‚‹ã¨ã‚µãƒ¼ãƒãŒãƒ‘ãƒ³ã‚¯ã™ã‚‹å•é¡Œã®ã“ã¨ ãŒè©³ã—ã„ã®ã§ä»Šå›žã¯èª¬æ˜Žã‚’çœç•¥ã—ã¾ã™ã€‚ ã¾ãŸã€Linuxï¼ˆæ£ç¢ºã«ã¯Kernel 3.9ä»¥é™ï¼‰ã«ãŠã‘ã‚‹SO_REUSEPORTã«ã¤ã„ã¦ã¯ã€ æˆ–ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒž
cubicdaiya 2015/01/07
linux

event

kernel
ãƒªãƒ³ã‚¯
Scaling Userspace @ Facebook
cubicdaiya 2014/12/31
facebook

kernel

linux
ãƒªãƒ³ã‚¯
The Linux Kernel Performance Project
Our goal is to work with the Linux community to further enhance the performance of the Linux kernel. The data available on this site allows community members to closely track performance gains and losses with every version of the kernel. Ultimately, we hope that this data will result in consistent performance increases, without regressions in major Linux kernel releases. In recent years, Linux has
cubicdaiya 2011/09/01
kernel

linux
ãƒªãƒ³ã‚¯
White Paper: Red Hat Crash Utility
White Paper: Red Hat Crash Utility by David Anderson <[email protected]> Copyright Â© 2003, 2008 by Red Hat Software, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
cubicdaiya 2009/12/09
kernel

debug

gdb
ãƒªãƒ³ã‚¯
IOCTLã‚’ã¤ã‹ã†
ioctl ã¯ã€ãªã«ã‚„ã‚‰ãƒ‡ãƒã‚¤ã‚¹ã‚’æ“ä½œã™ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’æ›¸ã„ãŸã“ã¨ãŒã‚ã‚Œã°ç›®ã«ã—ãŸã“ã¨ãŒã‚ã‚‹ã‹ã‚‚çŸ¥ã‚Œã¾ã›ã‚“ã—ã€ifconfig ã®ã‚ˆã†ãªãƒ‡ãƒã‚¤ã‚¹æ“ä½œã‚’ã™ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã®ã‚¨ãƒ©ãƒ¼ã§è¦‹è¦šãˆãŒã‚ã‚‹ã‹ã‚‚çŸ¥ã‚Œã¾ã›ã‚“ã€‚ ç§è‡ªèº«ã€è¦‹ã‚ˆã†è¦‹ã¾ãã§ã„ã‚ã„ã‚ãªãƒ—ãƒã‚°ãƒ©ãƒ ã‚’æ›¸ã„ã¦(æ‰“ã¡è¾¼ã‚“ã§)ã„ã‚‹ã¨ãã«ã€æ™‚ã€… ioctl ã«å‡ºä¼šã£ã¦ã„ã¾ã—ãŸã€‚ å¾—ãŸã„ã®çŸ¥ã‚Œãªã„å®šæ•°ã‚„ã‚‰å¾—ãŸã„ã®çŸ¥ã‚Œãªã„æ§‹é€ ä½“ã‚„ã‚‰ã‚’æ¸¡ã™ã®ã§ã€ç§ã«ã¨ã£ã¦ã¯ä¸æ°—å‘³ãªå˜åœ¨ã§ã—ãŸã€‚ C ã®é–¢æ•°ãªã‚‰ã€æ™®é€šã¯ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ã‚’èªã‚ã°å¼•æ•°ã¨æ©Ÿèƒ½ã¯æ›¸ã„ã¦ã‚ã‚‹ã®ã«ã€ioctl ã ã‘ã¯ã€ä½¿ã„æ–¹ã ã‘ã§ä¸èº«ã«ã¤ã„ã¦ã¯ä¸€åˆ‡ãªã—ãªã®ã§ã™ã€‚ ã§ã™ãŒã€ãƒ‡ãƒã‚¤ã‚¹ãƒ‰ãƒ©ã‚¤ãƒã‚’ã¤ãã‚‹ã‚ˆã†ã«ãªã£ã¦ã‹ã‚‰ã€ä¸€æ°—ã«è¬ŽãŒè§£ã‘ã¾ã—ãŸã€‚ ioctl ã¯ read ã‚„ write ã¨ã¯åˆ¥ç³»çµ±ã®ãƒ‰ãƒ©ã‚¤ãƒã¨ã®ã‚„ã‚Šå–ã‚Šã®å£ã§ã™ã€‚ read, write ãŒåŸºæœ¬çš„ã«ã¯é€£ç¶šã—ãŸãƒ‡ãƒ¼ã‚¿ã®ã‚„ã‚Šã¨ã‚Šã‚’ã™ã‚‹ã‚ˆã†ã«ä½¿ç”¨ã•ã‚Œã‚‹ã“ã¨ãŒå¤šã„
cubicdaiya 2009/12/03
driver

kernel
ãƒªãƒ³ã‚¯
Linux ã‚«ãƒ¼ãƒãƒ«ã®ã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã‚¹ã‚¤ãƒƒãƒå‡¦ç†ã‚’èªã¿è§£ã - naoyaã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼
Linux ã‚«ãƒ¼ãƒãƒ«ã®ãƒ—ãƒã‚»ã‚¹ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ©ã®æ ¸ã§ã‚ã‚‹ kernel/sched.c ã® schedule() ã‚’èªã¿é€²ã‚ã¦ã„ãã¨ã€ã‚¿ã‚¹ã‚¯åˆ‡ã‚Šæ›¿ãˆ(å®Ÿè¡Œã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆåˆ‡ã‚Šæ›¿ãˆ)ã¯ãã®åã‚‚ context_switch() ã¨ã„ã†é–¢æ•°ã«é›†ç´„ã•ã‚Œã¦ã„ã‚‹ã“ã¨ãŒåˆ†ã‹ã‚Šã¾ã™ã€‚2.6.20 ã® kernel/sched.c ã ã¨ä»¥ä¸‹ã®ã‚³ãƒ¼ãƒ‰ã§ã™ã€‚ 1839 static inline struct task_struct * 1840 context_switch(struct rq *rq, struct task_struct *prev, 1841 struct task_struct *next) 1842 { 1843 struct mm_struct *mm = next->mm; 1844 struct mm_struct *oldmm = prev->active_mm; 1845 184
cubicdaiya 2007/09/28
kernel

ã‚ã¨ã§èªã‚€
ãƒªãƒ³ã‚¯
1