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

yosuke_furukawa id:yosuke_furukawa

kernelã«é–¢ã™ã‚‹yosuke_furukawaã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (7)

${{author_name}}$

{{{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‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã‚’çµŒç”±ã™ã‚‹ç”Ÿã®Linuxã‚¹ãƒ¬ãƒƒãƒ‰ | POSTD
Linuxã®ã‚¹ãƒ¬ãƒƒãƒ‰ã¯ã€æ´—ç·´ã•ã‚ŒãŸç¾Žã—ã„è¨è¨ˆã§ã™ã€‚ã‚¹ãƒ¬ãƒƒãƒ‰ã¯ä»®æƒ³ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ã¨ãƒ•ã‚¡ã‚¤ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ãƒ†ãƒ¼ãƒ–ãƒ«ã‚’å…±æœ‰ã™ã‚‹ãƒ—ãƒã‚»ã‚¹ã«éŽãŽã¾ã›ã‚“ã€‚ãƒ—ãƒã‚»ã‚¹ã«ã‚ˆã£ã¦ç”Ÿæˆã•ã‚ŒãŸã‚¹ãƒ¬ãƒƒãƒ‰ã¯ã€ãƒ¡ã‚¤ãƒ³â€ã‚¹ãƒ¬ãƒƒãƒ‰ã®â€è¦ªãƒ—ãƒã‚»ã‚¹ã«è¿½åŠ ã•ã‚ŒãŸåãƒ—ãƒã‚»ã‚¹ã§ã™ã€‚ã“ã‚Œã‚‰ã¯åŒã˜ãƒ—ãƒã‚»ã‚¹ç®¡ç†ã®ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã‚’é€šã—ã¦å‡¦ç†ã•ã‚Œã‚‹ã®ã§ã€ã‚¹ãƒ¬ãƒƒãƒ‰ã«é–¢ã™ã‚‹ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã®ã‚»ãƒƒãƒˆã‚’åˆ†ã‘ã‚‹å¿…è¦æ€§ã‚’å–ã‚Šé™¤ãã¾ã™ã€‚ã“ã‚Œã¯ãƒ•ã‚¡ã‚¤ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ã¨åŒæ§˜ã«æ´—ç·´ã•ã‚ŒãŸæ–¹æ³•ã§ã™ã€‚ ä¸€èˆ¬çš„ã«ã€UNIXç³»ã®ã‚·ã‚¹ãƒ†ãƒ ã§ã¯fork()ã‚’ä½¿ã£ã¦ãƒ—ãƒã‚»ã‚¹ã‚’ç”Ÿæˆã—ã¾ã™ã€‚æ–°ã—ã„ãƒ—ãƒã‚»ã‚¹ã¯ã€ã‚ªãƒªã‚¸ãƒŠãƒ«ã®ã‚³ãƒ”ãƒ¼ã¨ã—ã¦ç‹¬è‡ªã®ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ã¨ãƒ•ã‚¡ã‚¤ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ãƒ†ãƒ¼ãƒ–ãƒ«ã‚’å–å¾—ã—ã¾ã™ã€‚ï¼ˆLinuxã§ã¯ã‚³ãƒ”ãƒ¼ã‚ªãƒ³ãƒ©ã‚¤ãƒˆã‚’ä½¿ç”¨ã—ã¦ã€ã“ã®éƒ¨åˆ†ã‚’åŠ¹çŽ‡çš„ã«å‡¦ç†ã—ã¾ã™ã€‚ï¼‰ã—ã‹ã—ã€ã“ã‚Œã¯éžå¸¸ã«é«˜åº¦ãªã‚¹ãƒ¬ãƒƒãƒ‰ã®ç”Ÿæˆæ–¹æ³•ãªã®ã§ã€Linuxã§ã¯åˆ¥ã® clone() ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã‚’ä½¿ç”¨ã—ã¾ã™ã€‚
yosuke_furukawa 2015/07/15
thread

linux

kernel
ãƒªãƒ³ã‚¯
10GbEæ™‚ä»£ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯I/Oé«˜é€ŸåŒ–
10GbEã€40GbEãªã©ã®æ¥µã‚ã¦é«˜é€Ÿãªé€šä¿¡ã‚’ã‚µãƒãƒ¼ãƒˆã™ã‚‹NICãŒã€PCã‚µãƒ¼ãƒã®é ˜åŸŸã§ã‚‚ä½¿ã‚ã‚Œã‚‹ã‚ˆã†ã«ãªã£ã¦ãã¦ã„ã‚‹ã€‚ ã“ã®ã‚ˆã†ãªé€Ÿåº¦ã®é€šä¿¡ã‚’ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ï¼ˆOSï¼‰ã§å‡¦ç†ã—é«˜ã„æ€§èƒ½ã‚’å¾—ã‚‹ã«ã¯æ§˜ã€…ãªéšœå®³ãŒã‚ã‚Šã€ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ãƒ»ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ä¸¡é¢ã®å®Ÿè£…ã‚’è¦‹ç›´ã™å¿…è¦ãŒã‚ã‚‹ã€‚ æœ¬ã‚»ãƒƒã‚·ãƒ§ãƒ³ã§ã¯ã€ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ãƒ»ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ä¸¡é¢ã«ã©ã®ã‚ˆã†ãªæ”¹è‰¯ãŒè¡Œã‚ã‚Œã¦ãã¦ãŠã‚Šã€æ€§èƒ½ã‚’å¼•ãå‡ºã™ã«ã¯ã©ã®ã‚ˆã†ã«ã“ã‚Œã‚‰ã‚’ä½¿ç”¨ã—ãŸã‚‰ã‚ˆã„ã®ã‹ã«ã¤ã„ã¦ç´¹ä»‹ã™ã‚‹ã€‚Read less
yosuke_furukawa 2015/07/07
process

kernel

linux
ãƒªãƒ³ã‚¯
Linuxã§ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã‚„ã‚ãƒ£ãƒƒã‚·ãƒ¥ã‚µãƒ¼ãƒã‚’ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã•ã›ã‚‹ãŸã‚ã®ã‚«ãƒ¼ãƒãƒ«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° - ã‚†ã†ã†ããƒ–ãƒã‚°
æœ¬è¨˜äº‹ã®å…¬é–‹å¾Œã®2016å¹´7æœˆã«ã¯ã¦ãªã«ãŠã‘ã‚‹ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°äº‹ä¾‹ã‚’ç´¹ä»‹ã—ãŸã€‚ ã¯ã¦ãªã«ãŠã‘ã‚‹Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹æ”¹å–„ / Linux network performance improvement at hatena - Speaker Deck HAProxy ã‚„ nginx ãªã©ã®ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã‚„ãƒªãƒãƒ¼ã‚¹ãƒ—ãƒã‚ã‚·ã€memcached ãªã©ã® KVS ã®ã‚ˆã†ãªé«˜ãƒ‘ã‚±ãƒƒãƒˆãƒ¬ãƒ¼ãƒˆã«ãªã‚Šã‚„ã™ã„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã«ãŠã„ã¦ã€å˜ä¸€ã® CPU ã‚³ã‚¢ã«è² è·ãŒåã‚Šã€ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã—ãªã„ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ ä»Šå›žã¯ã€ã“ã®ã‚ˆã†ãªãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã«ãŠã„ã¦ CPU è² è·ãŒãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã—ãªã„ç†ç”±ã¨ã€ãƒžãƒ«ãƒã‚³ã‚¢ã‚¹ã‚±ãƒ¼ãƒ«ã•ã›ã‚‹ãŸã‚ã® Linux ã‚«ãƒ¼ãƒãƒ«ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°æ‰‹æ³•ã¨ã—ã¦ RFS (Receive Flow Steering) ã‚’
yosuke_furukawa 2015/07/07
performance

network

kernel
ãƒªãƒ³ã‚¯
æˆ–ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒžã®ä¸€ç”Ÿ Â» Linux Kernel 3.9 ã® SO_REUSEPORT
Linux Kernel 3.9 ã«ã¯ SO_REUSEPORT ãŒè¿½åŠ ã•ã‚Œã¦ã„ã‚‹ãã†ã§ã™ã€‚SO_REUSEPORT ã§ã‚°ã‚°ã‚‹ã¨æ—¥æœ¬èªžã®ãƒšãƒ¼ã‚¸ã®ä¸ã§ä¸€ç•ªä¸Šã«å‡ºã¦ãã‚‹å½“blogï¼ˆ2013-06-02ç¾åœ¨ï¼‰ã¨ã—ã¦ã¯èª¿æŸ»ã—ãªã„ã‚ã‘ã«ã¯ã„ãã¾ã›ã‚“ :-) Linux ã® SO_REUSEPORT ã¯ã€ŒTCP ã‚½ã‚±ãƒƒãƒˆã‚’å®Œå…¨é‡è¤‡ bind ã—ã€å—ã‘ä»˜ã‘ãŸã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’ãã‚Œãžã‚Œã®ã‚½ã‚±ãƒƒãƒˆã«é©å½“ã«å‰²ã‚ŠæŒ¯ã‚‹ã€ã¨ã„ã†æ©Ÿèƒ½ã®ã‚ˆã†ã§ã™ã€‚ã“ã‚Œã¯ã€BSD ã® SO_REUSEPORT ã‚ˆã‚Šæ©Ÿèƒ½ãŒã€Œå¼·ã„ã€ã¨ã„ã†ã“ã¨ã§ã™ï¼ˆå‚è€ƒï¼‰ã€‚SO_REUSEADDR ã®æ™‚ã‚‚ãã†ã§ã™ãŒã€åŒã˜åå‰ã§é•ã†æ©Ÿèƒ½ã«ã™ã‚‹ã®ã‚„ã‚ã¦ãã‚Œãªã„ã‹ãªãâ€¦ å®Ÿé¨“ SO_REUSEPORT ãŒè¿½åŠ ã•ã‚ŒãŸã®ã¯3æœˆ10æ—¥ã”ã‚ã®ã‚ˆã†ãªã®ã§ã™ãŒã€æ—¢ã«3ã‹æœˆãŸã£ã¦ã„ã¦ Fedora 18 ãŒ Kernel 3.9 ãƒ™ãƒ¼ã‚¹ã«ãªã£ã¦ãŠã‚Šã€è©¦ã™ãŸã‚ã«ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‹ã‚‰ãƒ“ãƒ«ãƒ‰
yosuke_furukawa 2015/01/07
SO_REUSEPORT

linux

kernel
ãƒªãƒ³ã‚¯
Future OS research directions in CCS
Why Plan 9 is not dead yet And What we can learn from it Ron Minnich Advanced Computing Lab Los Alamos National Lab LA-UR-05-4132 Unix â€¢ Simple open/read/write/close with streams of bytes â€¢ Resources are named via a visible path â€¢ This is such an advanced concept that NT still does not do it (try ls \devices sometime) â€¢ It was also extremely controversial Two guys and a computer Early Unix Proces
yosuke_furukawa 2014/11/24
kernel
ãƒªãƒ³ã‚¯
IBM Developer
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
yosuke_furukawa 2014/08/17
C++

memory

kernel

programming
ãƒªãƒ³ã‚¯
æ–°208.5æ—¥å•é¡Œ - Systems with IntelÂ® XeonÂ® Processor E5 hung after upgrade of Red Hat Enterprise Linux 6
Linux ã®é€£ç¶šç¨¼åƒæ™‚é–“ãŒ 208.5 æ—¥ã‚’éŽãŽãŸæ®µéšŽã§çªå¦‚ Kernel Panic ã‚’å¼•ãèµ·ã“ã™ã¨ã„ã†éŽæ¿€ãªæŒ™å‹•ã§2011å¹´ã®å¹´ã®ç€¬ã«è©±é¡Œã¨ãªã£ãŸ "æ—§208.5æ—¥å•é¡Œ" ã§ã™ãŒã€ã‚ã‚Œã‹ã‚‰äºŒå¹´ãŒçµŒã£ãŸä»Šã€Linux Kernel å†…ã® bug ã¨ Intel Xeon CPU ã® bug ã®åˆã‚ã›æŠ€ã«ã‚ˆã‚Šå†åº¦é¡žä¼¼ã®ä¸å…·åˆãŒç™ºç”Ÿã™ã‚‹ã“ã¨ãŒåˆ†ã‹ã£ã¦ã„ã¾ã™ã€‚ æ—§ 208.5 æ—¥å•é¡Œã®ç™ºç”ŸåŽŸç†ã«é–¢ã—ã¦ã¯ä»¥ä¸‹ã® blog ãŒå‚è€ƒã«ãªã‚Šã¾ã™ã€‚ okkyã®éŠ€æ²³åˆ¶åœ§å¥‡èš : sched_clock() overflow after 208.5 days in Linux Kernel è¿½è¨˜(2014/1/4) æ–°208.5æ—¥å•é¡Œã®ç°¡æ˜“ãƒã‚§ãƒƒã‚¯ãƒ„ãƒ¼ãƒ«ã‚’ä½œæˆã—ã¾ã—ãŸã€‚ã‚ˆã‚ã—ã‘ã‚Œã°ãŠä½¿ã„ä¸‹ã•ã„ã€‚ tsc_checker - æ–°208.5æ—¥å•é¡Œç°¡æ˜“ãƒã‚§ãƒƒã‚¯ãƒ„ãƒ¼ãƒ« ã¾ãŸã€Linux Kernel ã«ãŠã‘ã‚‹æ™‚é–“
yosuke_furukawa 2013/12/24
ã™ã’ãƒ¼ã‚„ã°ãã†ãªã‚“ã ã‘ã©ã€‚

linux

kernel

CPU
ãƒªãƒ³ã‚¯
1