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ilyaletre 2020/02/20
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linux

kernel
ãƒªãƒ³ã‚¯
golangã¨Dockerã¨OOM â€” KaoriYa
golangã§æ›¸ã„ãŸãƒ—ãƒã‚°ãƒ©ãƒ ã‚’Dockerã§å‹•ã‹ã—OOMãŒç™ºç”Ÿã—ãŸéš›ã«ãªã‚‹ã¹ãæƒ…å ±ã‚’æ®‹ã—ã¦æ®ºã•ã‚Œã‚‹æ–¹æ³•ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ 2020/08/16è¿½è¨˜: ã“ã®è¨˜äº‹ã®å†…å®¹ã¯golangã«é–¢ã—ã¦ã¯ã‚„ã‚„ç¾å®Ÿçš„ã§ã¯ãªããªã£ã¦ã—ã¾ã„ã¾ã—ãŸã€‚ è©³ã—ãã¯ç¶šç·¨ã‚’å‚ç…§ã—ã¦ãã ã•ã„ã€‚ TL;DR golangè£½ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã¯ä»®æƒ³ãƒ¡ãƒ¢ãƒª(VSZ)ã®ç¢ºä¿ã«å¤±æ•—ã™ã‚‹ã¨goroutineã®ãƒ€ãƒ³ãƒ—ã‚’åã„ã¦æ»ã¬ Dockerã®OOMã¯RSSãƒ™ãƒ¼ã‚¹ã§æ¤œå‡ºæ™‚ã«SIGKILLã‚’æŠ•ã’ã¦ãã‚‹ Dockeråˆ©ç”¨æ™‚ã«VSZã§åˆ¶é™ã‚’ã‹ã‘ã‚‹ã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚’æ›¸ã„ãŸ golangè£½ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã¯linux-amd64ã«ãŠã„ã¦æœ€ä½Žã§ã‚‚101MBã®VSZã‚’è¦æ±‚ã™ã‚‹ VSZã®åˆ¶é™ãŒãã‚Œã‚ˆã‚Šå°ã•ã„ã¨å½“ç„¶èµ·å‹•ã§ããªã„ å®Ÿéš›ã®RSSã¯3MBç¨‹åº¦ã§èµ·å‹•ã™ã‚‹ Background ã‚³ãƒ³ãƒ†ãƒŠå†…ã§å‹•ã„ã¦ã„ã‚‹ãƒ—ãƒãƒ€ã‚¯ã‚·ãƒ§ãƒ³ä¸Šã®golangè£½ã®ãƒ—ãƒã‚°ãƒ©ãƒ ãŒæ™‚ã€…OOMã«æ®ºã•ã‚Œã¦
ilyaletre 2020/01/19
ç¢ºã‹ã«dockerã‚’ä½¿ã£ã¦ãƒ—ãƒã‚»ã‚¹ç®¡ç†ã™ã‚‹å´ã‹ã‚‰ã™ã‚‹ã¨ãƒ©ãƒ³ã‚¿ã‚¤ãƒ ã®ç‰¹æ€§æŠŠæ¡ã—ã¦VSSã§åˆ¶é™ã™ã‚‹ã‚ˆã‚ŠRSSã§åˆ¶é™ã™ã‚‹æ–¹ãŒåˆ†ã‹ã‚Šã‚„ã™ã„ãªãã€‚(ä»Šå›žã®ã‚ˆã†ãªè¦ä»¶ã§ãªã‘ã‚Œã°)

golang

docker

cgroup

linux
ãƒªãƒ³ã‚¯
BPF comes to firewalls [LWN.net]
LWN.net needs you!Without subscribers, LWN would simply not exist. Please consider signing up for a subscription and helping to keep LWN publishing The Linux kernel currently supports two separate network packet-filtering mechanisms: iptables and nftables. For the last few years, it has been generally assumed that nftables would eventually replace the older iptables implementation; few people expe
ilyaletre 2020/01/09
Linux

bpf

network
ãƒªãƒ³ã‚¯
ä»Šæ—¥ã‹ã‚‰å§‹ã‚ã‚‹XDPã¨å–ã‚Šå·»ãç’°å¢ƒã«ã¤ã„ã¦ - ãŠè…¹.ãƒ˜ãƒƒã‚¿ã€‚
ã¯ã˜ã‚ã« ã“ã®è¨˜äº‹ã¯BBSakuraNetworkã‚¢ãƒ‰ãƒ™ãƒ³ãƒˆã‚«ãƒ¬ãƒ³ãƒ€ãƒ¼ã®5æ—¥ç›®ã§ã™ã€‚ è‡ªåˆ†ã¯BBSakuraã§ã‚¢ãƒ«ãƒã‚¤ãƒˆã‚’ã—ã¦ã„ã‚‹å¤§å¦ç”Ÿã§ã™ã€‚ ã•ãã‚‰ã§ãƒã‚¤ãƒˆã‚’ã—ã¦ã„ãŸã¨ã“ã‚æ°—ãŒã¤ã„ãŸã‚‰å‡ºå‘ã—ã¦ã„ã¦ä»Šã¯ã‚³ã‚¢ãƒ¢ãƒã‚¤ãƒ«ã®é–‹ç™ºã«æºã‚ã£ã¦ã„ã¾ã™ã€‚ã‚¢ãƒ«ãƒã‚¤ãƒˆã«å‡ºå‘ã£ã¦ã‚ã‚‹ã‚“ã§ã™ãã€‚ã³ã£ãã‚Šã€‚ ä»Šã¯B3ãªã®ã§ãã‚ãã‚å¤§å¦ã§ç ”ç©¶ã—ãªã„ã¨ã„ã‘ãªãã¦ç„¦ã‚Šã‚’æ„Ÿã˜ã¦ã¾ã™ã€‚ ã•ã¦ã€ä»Šå›žè©±ã™ã®ã¯è‡ªåˆ†ã®è¶£å‘³ã®è©±ã‚’ã—ã¾ã™ã€‚ eBPF ã¨è¨€ã‚ã‚Œã‚‹ãƒ‘ã‚±ãƒƒãƒˆå‡¦ç†ã®ãŸã‚ã®å‡¦ç†æŠ€è¡“ãŒã‚ã‚‹ã®ã§ã™ãŒãã‚ŒãŒå¥½ãã§ã€æœ€è¿‘ã¯BPFã‚’åˆ©ç”¨ã—ãŸé«˜é€Ÿãƒ‘ã‚±ãƒƒãƒˆæŠ€è¡“ã®æ‰‹æ³•ã¨ã—ã¦XDPã‚’è¿½ã„ã‹ã‘ã¦ã„ã¾ã™ã€‚ä»Šå›žã¯ãã‚Œã‚’å§‹ã‚ã‚‹ã«ã¯ã©ã†ã™ã‚Œã°ã„ã„ã‹ã‚’ã¿ãŸã„ãªè©±ã‚’ç´¹ä»‹ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ å¯¾è±¡èªè€…ã¨ã—ã¦ã¯é«˜é€Ÿãƒ‘ã‚±ãƒƒãƒˆå‡¦ç†ã‚’ã‚„ã‚ŠãŸã„ã‘ã©ã€ã©ã†ã™ã‚Œã°ã„ã„ã‹ã‚ã‹ã‚‰ãªã„ï¼ã£ã¦äººã‚’ã‚¿ãƒ¼ã‚²ãƒƒãƒˆã«ã—ã¦ã¾ã™ã€‚å§‹ã‚ã‚‹ã¨ãã«ã¿ã‚‹ã¨æ‰‹å¼•ãã¿ãŸã„ãªknowledgeã‚’ç›®æŒ‡ã—ã¾ã™ï¼ˆè‡ªåˆ†
ilyaletre 2019/12/09
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linux

ebpf

xdp
ãƒªãƒ³ã‚¯
ç’°å¢ƒå¤‰æ•°ã‚’è¨å®šã™ã‚‹ã ã‘ã§Ruby on Railsã‚µãƒ¼ãƒãŒ10%é«˜é€ŸåŒ–ã™ã‚‹(ã‹ã‚‚ã—ã‚Œãªã„)è©± - Akatsuki Hackers Lab | æ ªå¼ä¼šç¤¾ã‚¢ã‚«ãƒ„ã‚ï¼ˆAkatsuki Inc.)
ã“ã®è¨˜äº‹ã¯Â Akatsuki Advent Calendar 2019 1æ—¥ç›®ã®è¨˜äº‹ã§ã™ã€‚ ã¯ã˜ã‚ã« ã‚¢ã‚«ãƒ„ã‚ã§ã¯ Ruby on Rails ã‚’ä½¿ã£ãŸã‚²ãƒ¼ãƒ ã‚µãƒ¼ãƒã‚’é–‹ç™ºãƒ»é‹ç”¨ã—ã¦ã„ã¾ã™ã€‚ã‚²ãƒ¼ãƒ ã®ä½“é¨“ã‚’å‘ä¸Šã™ã‚‹ãŸã‚ã«ã€ãƒ¬ã‚¹ãƒãƒ³ã‚¹ã‚¿ã‚¤ãƒ ã¯ä¸€ã¤ã®é‡è¦ãªè¦ç´ ã¨ãªã‚‹ãŸã‚ã€ç¨®ã€…ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’è¡Œãªã£ã¦ã„ã¾ã™ã€‚ä»Šå›žã¯ãã®ä¸€ä¾‹ã¨ã—ã¦ã€ç’°å¢ƒå¤‰æ•°ã‚’1ã¤è¨å®šã™ã‚‹ã ã‘ã§ã€ã‚ã‚‹APIã®ãƒ¬ã‚¹ãƒãƒ³ã‚¹ã‚¿ã‚¤ãƒ ãŒ10%ã‚‚æ”¹å–„ã—ãŸä¾‹ã‚’ã”ç´¹ä»‹ã—ã¾ã™ã€‚ TL;DR å¤šæ•°ã®æ™‚åˆ»ã‚’å«ã‚€ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’æ‰±ã† Ruby on Rails ã‚µãƒ¼ãƒã§ã¯ã€ TZ ç’°å¢ƒå¤‰æ•°ã‚’è¨å®šã™ã‚‹ã“ã¨ã§ã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã‚¿ã‚¤ãƒ ã‚¾ãƒ¼ãƒ³è¨å®šãƒ•ã‚¡ã‚¤ãƒ« /etc/localtime ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ãŒæ¸›ã‚Šã€é«˜é€ŸåŒ–ãŒå›³ã‚Œã‚‹ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ã€‚ åŠ¹æžœã¯ Time ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆ1å€‹ã‚ãŸã‚Šæ•°Î¼sã®çŸç¸®ã¨ã„ã£ãŸã‚ªãƒ¼ãƒ€ãƒ¼ã§ã™ãŒã€ãƒãƒªã‚‚ç©ã‚‚ã‚Œã°å±±ã¨ãªã‚Šã€æ•°åƒå€‹ã®ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’å‡¦ç†ã™ã‚‹API
ilyaletre 2019/12/02
perfã¨straceä½¿ã£ã¦çªãæ¢ã‚ãŸã®ç´ æ™´ã‚‰ã—ã„ã€‚

ruby

linux

performance
ãƒªãƒ³ã‚¯
ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã§ã®ãƒ‘ã‚±ãƒƒãƒˆå‡¦ç†ã‚ã‚Œã“ã‚Œã€œä½•æ•…æˆ‘ã€…ã¯ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã‚’è‡ªä½œã™ã‚‹ã«è‡³ã£ãŸã®ã‹ã€œ
This document summarizes a LINE Developer meetup in Kyoto on load balancing techniques. It discusses LINE's private cloud "Verda" and the load balancing architecture used including L3, L4, and L7 load balancers. It also covers programming load balancers using eBPF and XDP to improve performance by handling traffic directly on the NIC. Load testing is discussed using tools like TRex to generate and
ilyaletre 2019/11/30
network

linux

kernel

ebpf
ãƒªãƒ³ã‚¯
KPTI/KAISER Meltdown Initial Performance Regressions
Recent posts: 22 Jul 2024 Â» No More Blue Fridays 24 Mar 2024 Â» Linux Crisis Tools 17 Mar 2024 Â» The Return of the Frame Pointers 10 Mar 2024 Â» eBPF Documentary 28 Apr 2023 Â» eBPF Observability Tools Are Not Security Tools 01 Mar 2023 Â» USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon 17 Feb 2023 Â» USENIX SREcon APAC 2023: CFP 02 May 2022 Â» [email protected] 15 Apr 2022 Â» Netfl
ilyaletre 2019/11/05
ã‚ã¨ã§èªã‚€

performance

linux
ãƒªãƒ³ã‚¯
https://dl.acm.org/doi/10.1145/3341301.3359640
ilyaletre 2019/10/31
performance

linux
ãƒªãƒ³ã‚¯
ã„ã¾çŸ¥ã£ã¦ãŠããŸã„Linuxâ”€Webã‚¢ãƒ—ãƒªãŒOSã®ãƒ—ãƒã‚»ã‚¹ã¨ã—ã¦ã©ã®ã‚ˆã†ã«è¦‹ãˆã‚‹ã‹ï¼Ÿ ã‚’é‹ç”¨ã«ç”Ÿã‹ã™ï½œãƒã‚¤ã‚¯ãƒ©ã‚¹è»¢è·ãƒ»æ±‚äººæƒ…å ±ã‚µã‚¤ãƒˆ AMBIï¼ˆã‚¢ãƒ³ãƒ“ï¼‰
ã„ã¾çŸ¥ã£ã¦ãŠããŸã„Linuxâ”€Webã‚¢ãƒ—ãƒªãŒOSã®ãƒ—ãƒã‚»ã‚¹ã¨ã—ã¦ã©ã®ã‚ˆã†ã«è¦‹ãˆã‚‹ã‹ï¼ŸÂ ã‚’é‹ç”¨ã«ç”Ÿã‹ã™ Webã‚¢ãƒ—ãƒªã‚’å‹•ã‹ã—ã¦è² è·ã‚’ã‹ã‘ã‚‹ã¨ã€OSã®ãƒ—ãƒã‚»ã‚¹ã¨ã„ã†è¦³ç‚¹ã§ã¯ã©ã®ã‚ˆã†ã«è¦‹ãˆã‚‹ã®ã§ã—ã‚‡ã†ï¼ŸÂ ãã‚Œã‚’é€šã—ã¦é‹ç”¨ã‚„ãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã§ã¯ã©ã†ã„ã£ãŸã“ã¨ãŒåˆ†ã‹ã‚‹ã®ã§ã—ã‚‡ã†ï¼ŸÂ Linuxã‚«ãƒ¼ãƒãƒ«ã®é–‹ç™ºè€…ã§ã‚‚ã‚ã‚‹æ¦å†…è¦šï¼ˆsatï¼‰ã•ã‚“ã«ã‚ˆã‚‹è§£èª¬ã§ã™ã€‚ ã“ã‚“ã«ã¡ã¯ã€satï¼ˆ@satoru_takeuchiï¼‰ã¨ç”³ã—ã¾ã™ã€‚ ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ãŒèª•ç”Ÿã—ã¦ã‹ã‚‰ç¾åœ¨ã¾ã§ã€æœ€çµ‚çš„ã«ã‚¨ãƒ³ãƒ‰ãƒ¦ãƒ¼ã‚¶ãŒæ„è˜ã™ã‚‹ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³é–‹ç™ºã¯ã©ã‚“ã©ã‚“æ¥½ã«ãªã£ã¦ã„ã¾ã™ã€‚å…ˆäººãŸã¡ã®ãŸã‚†ã¾ã¬åŠªåŠ›ã®çµæžœã€ã‚¢ãƒ—ãƒªé–‹ç™ºè€…ã¯OSã‚„ã€ãã®ã•ã‚‰ã«ä¸‹ã«ã‚ã‚‹ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã®ã“ã¨ã‚’ã»ã¨ã‚“ã©æ„è˜ã™ã‚‹ã“ã¨ãªãé–‹ç™ºãŒã§ãã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ ã—ã‹ã—ã€ã€Œä½œã£ãŸã‚¢ãƒ—ãƒªãŒã€OSãƒ¬ãƒ™ãƒ«ã§ã©ã®ã‚ˆã†ã«å‹•ã„ã¦ã„ã‚‹ã‹ï¼Ÿã€ãŒä»Šä¸€ã¤ãƒ”ãƒ³ã¨æ¥ãªãã¦ã€ãƒ¢ãƒ¤ãƒ¢ãƒ¤ã—ã¦ã„ãªã„ã§ã—ã‚‡ã†ã‹ã€‚ãã‚Œ
ilyaletre 2019/10/19
ã»ã‚“ã¨ã«è§£ã‚‰ãªã„æ™‚ã¯ä»®èª¬ã™ã‚‰ç«‹ãŸãªã„ã“ã¨ã‚ã£ã¦æ–‡å—é€šã‚Šç«‹ã¡å°½ãã—ãŸã‚Šã™ã‚‹ã€‚å¯¾è±¡ã®ãƒ—ãƒã‚°ãƒ©ãƒ ãŒä½•ã®ãƒªã‚½ãƒ¼ã‚¹ã‚’ã©ã†ä½¿ã†ã‹çŸ¥ã‚‹ã®å¤§äº‹ã€‚NginX ã® x ã¯å¤§æ–‡å—ãªã®ã‹ã€‚ã€‚ã€‚

linux
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Patch Workflow With Mutt 2019
Given that the main development workflow for most kernel maintainers is with em ail, I spend a lot of time in my em ail client. For the past few decades I have used (mutt), but every once in a while I look around to see if there is anything else out there that might work better. One project that looks promising is (aerc) which was started by (Drew DeVault). It is a terminal-based em ail client writte
ilyaletre 2019/10/16
ã‚¿ãƒ¼ãƒŸãƒŠãƒ«ã§ãƒ¡ãƒ¼ãƒ«è¦‹ãªãŒã‚‰ Linux ã®ãƒ‘ãƒƒãƒä½œã‚‹ãƒ¯ãƒ¼ã‚¯ãƒ•ãƒãƒ¼ã€‚

linux

kernel
ãƒªãƒ³ã‚¯
GitHub - ixy-languages/ixy-languages: A high-speed network driver written in C, Rust, C++, Go, C#, Java, OCaml, Haskell, Swift, Javascript, and Python
Ixy is an educational user space network driver for the Intel ixgbe family of 10 Gbit/s NICs (82599ES aka X520, X540, X550, X552, ...). Its goal is to show that writing a super-fast network driver can be surprisingly simple, check out the full description in the main repository of the C implementation to learn about the basics of user space drivers. Ixy was originally written in C as lowest common
ilyaletre 2019/10/09
è‰²ã‚“ãªè¨€èªžã§NICã®ãƒ‰ãƒ©ã‚¤ãƒæ›¸ã„ã¦ã‚‹ã€‚Rustã®ã‚µãƒ³ãƒ—ãƒ«ã¿ãŸã‚‰vfioä½¿ã£ã¦ã‚‹ã¿ãŸã„ï¼Ÿ

network

rust

linux
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An introduction to KProbes [LWN.net]
Introduction KProbes is a debugging mechanism for the Linux kernel which can also be used for monitoring events inside a production system. You can use it to weed out performance bottlenecks, log specific events, trace probl ems etc. KProbes was developed by IBM as an underlying mechanism for another higher level tracing tool called DProbes. DProbes adds a number of features, including its own scri
ilyaletre 2019/09/04
kprobeã®ä»•çµ„ã¿ã‚ˆãè§£ã£ã¦ãªã‹ã£ãŸã®ã§

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linux

kernel
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bpf(2) - Linux manual page
ilyaletre 2019/09/04
ã‚ˆãæ›¸ã‹ã‚Œã¦ã„ã¦åŠ©ã‹ã‚‹

linux

ebpf
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linux/tools/bpf/bpf_exp.y at 6f0d349d922ba44e4348a17a78ea51b7135965b1 Â· torvalds/linux
ilyaletre 2019/09/03
bpfã‚’asmã§dumpã™ã‚‹ã‚„ã¤

linux

ebpf

kernel
ãƒªãƒ³ã‚¯
ãªãœäººã¯è‡ªä½œOSã‚’ã™ã‚‹ã®ã‹ï¼Ÿè‡ªä½œOSã¨ã¯ä½•ã‹ï¼Ÿ ã€œè‡ªä½œOSã®ã„ã¾ã¨æ˜” [ç¬¬1å›ž] | ã•ãã‚‰ã®ãƒŠãƒ¬ãƒƒã‚¸
ã¿ãªã•ã‚“ã€è‡ªä½œOSã¨ã„ã†è¨€è‘‰ã‚’ã”å˜çŸ¥ã§ã—ã‚‡ã†ã‹ï¼Ÿ è‡ªä½œPCã¨ã„ã†è¨€è‘‰ã«ã¯é¦´æŸ“ã¿ãŒã‚ã£ã¦ã‚‚ã€è‡ªä½œOSã¨ã„ã†è¨€è‘‰ã¯åˆã‚ã¦èžã„ãŸã¨ã„ã†æ–¹ã‚‚å¤šãã„ã‚‰ã£ã—ã‚ƒã‚‹ã¨æ€ã„ã¾ã™ã€‚æœ¬é€£è¼‰ã§ã¯ã€ãã‚‚ãã‚‚è‡ªä½œOSã¨ã¯ä½•ã‹ã€ã¨ã„ã†åŸºæœ¬çš„ãªã¨ã“ã‚ã‹ã‚‰ã€è‡ªä½œOSã®ã“ã‚Œã¾ã§ã®æ´å²ã€ç¾ä»£ã®ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ãƒ¼ã«ãŠã‘ã‚‹è‡ªä½œOSã®é›£ã—ã•ã€ãã—ã¦è‡ªä½œOSã®å°†æ¥çš„ãªå¯èƒ½æ€§ã«ã¤ã„ã¦ã€ç†è€…ã®å®Ÿä½“é¨“ã‚’è¸ã¾ãˆãªãŒã‚‰ã”ç´¹ä»‹ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ èº«è¿‘ã«ã‚ã‚‹OSã®ä¾‹ è‡ªä½œOSã¨ã„ã†ã®ã¯ã€OS, ã¤ã¾ã‚Šã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã‚’è‡ªåˆ†ã®æ‰‹ã§ã¤ãã‚Šã‚ã’ã‚‹ã“ã¨ã‚’æŒ‡ã—ã¾ã™ã€‚ã¨ã„ã£ã¦ã‚‚ã€ãã‚‚ãã‚‚OSã¨ã¯ä½•ã‹çŸ¥ã‚‰ãªã„æ–¹ã‚‚å¤šãã„ã‚‰ã£ã—ã‚ƒã‚‹ã¨æ€ã„ã¾ã™ã®ã§ã€æœ€åˆã¯ãã‚‚ãã‚‚OSã¨ã¯ä¸€ä½“ä½•ãªã®ã‹è¦‹ã¦ã„ãã¾ã—ã‚‡ã†ã€‚ ã•ã¦ã€ã¿ãªã•ã‚“ã®çŸ¥ã£ã¦ã„ã‚‹OSã«ã¯ã©ã‚“ãªã‚‚ã®ãŒã‚ã‚‹ã§ã—ã‚‡ã†ã‹ï¼Ÿä¸‹è¨˜ã®å›³ã¯ã€2019å¹´5æœˆã®ã€æ—¥æœ¬å›½å†…ã«ãŠã‘ã‚‹OSã®ã‚·ã‚§ã‚¢ã‚’ç¤ºã—ãŸã‚°ãƒ©ãƒ•ã§ã™ã€‚ æœ€ã‚‚å¤šãä½¿ã‚ã‚Œã¦ã„ã‚‹O
ilyaletre 2019/08/25
os

linux

ã‚ã¨ã§èªã‚€
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filter.txt\networking\Documentation - kernel/git/torvalds/linux.git - Linux kernel source tree
ilyaletre 2019/08/06
çµå±€ã“ã‚Œã‚’èªã‚ã«ãªã‚‹ã‚“ã ã‚ˆãªã‚ã€‚

linux

kernel

ebpf

performance
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https://www.lfasiallc.com/wp-content/uploads/2017/11/Storage-Performance-Tuning-for-FAST-Virtual-Machines_Fam-Zheng.pdf
ilyaletre 2019/08/05
linux

kvm

storage

performance
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The Linux Kernel: ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯
æ¬¡ã®ãƒšãƒ¼ã‚¸ å‰ã®ãƒšãƒ¼ã‚¸ ç›®æ¬¡ã¸ 11. ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚ãƒ³ã‚°ã¨ Linux ã¨ã¯ã»ã¨ã‚“ã©åŒç¾©èªžã§ã‚ã‚‹ã€‚æœ¬å½“ã®æ„å‘³ã§ã€Linux ã¯ ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã‚‚ã—ãã¯ World Wide Web(WWW) ã®ç”£ç‰©ã§ã‚ã‚‹ã€‚é–‹ç™ºè€…ã‚„ãƒ¦ãƒ¼ã‚¶ãŸã¡ ã¯ã‚¦ã‚§ãƒ–ã‚’ä½¿ã£ã¦æƒ…å ±ã‚„ã‚¢ã‚¤ãƒ‡ã‚¢ã‚„ã‚³ãƒ¼ãƒ‰ã‚’äº¤æ›ã—ã¦ã„ã‚‹ã—ã€Linux ãã®ã‚‚ã®ãŒçµ„ç¹”ã« ãŠã‘ã‚‹ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã¸ã®è¦æ±‚ã‚’æº€ãŸã™ãŸã‚ã«åˆ©ç”¨ã•ã‚Œã¦ã„ã‚‹ã€‚ã“ã®ç« ã§ã¯ã€TCP/IP ã¨ ç·ç§°ã•ã‚Œã‚‹ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ—ãƒãƒˆã‚³ãƒ«ã‚’ Linux ãŒã©ã®ã‚ˆã†ã«ã‚µãƒãƒ¼ãƒˆã—ã¦ã„ã‚‹ã‹ã‚’ è§£èª¬ã™ã‚‹ã€‚ TCP/IP ãƒ—ãƒãƒˆã‚³ãƒ«ãŒè¨è¨ˆã•ã‚ŒãŸã®ã¯ã€ARPA NET ã«æŽ¥ç¶šã•ã‚ŒãŸã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿é–“ ã§ã®é€šä¿¡ã‚’ã‚µãƒãƒ¼ãƒˆã™ã‚‹ãŸã‚ã§ã‚ã£ãŸã€‚åˆè¡†å›½æ”¿åºœã«ã‚ˆã£ã¦è¨ç«‹ã•ã‚ŒãŸã‚¢ãƒ¡ãƒªã‚« ã®ç ”ç©¶ç”¨ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã§ã‚ã‚‹ ARPA NET ã¯ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®åŸºæœ¬æ¦‚å¿µã‚’ä½œã‚Šå‡ºã—ãŸ ãƒ‘ã‚¤ã‚ªãƒ‹ã‚¢ã§ã‚ã‚Šã€ãã®ä¸ã«ã¯ã€ãƒ‘ã‚±ãƒƒãƒˆã‚¹ã‚¤ãƒƒãƒãƒ³ã‚°
ilyaletre 2019/07/20
linux

kernel

network
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ãƒ¡ãƒ¢ãƒªç®¡ç†ã€ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ã€ãƒšãƒ¼ã‚¸ãƒ†ãƒ¼ãƒ–ãƒ«
â—†ãƒ—ãƒã‚»ã‚¹ã®ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ã®å®Ÿè£… ãƒ—ãƒã‚»ã‚¹ã®ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ã¯ã€æ¬¡ã®ã‚ˆã†ãªé€£ç¶šé ˜åŸŸã«åˆ†å‰²ã•ã‚Œã¦ã„ã‚‹ã€‚ ãƒ†ã‚ã‚¹ãƒˆ æ©Ÿæ¢°èªžã‚’ç½®ãã€‚VM_EXEC å±žæ€§ã¨ VM_READå±žæ€§ãŒä»˜ã„ã¦ã„ã‚‹ã€‚æ›¸ãè¾¼ã¿ç¦æ¢ ã§å…±æœ‰å¯èƒ½ã€‚mm_struct ã® start_code ã¨ end_code ãŒã€é–‹å§‹ç•ªåœ°ã¨çµ‚äº†ç•ªåœ° ã‚’ä¿æŒã™ã‚‹ã€‚ ãƒ‡ãƒ¼ã‚¿(åˆæœŸå€¤ä»˜ã) ãƒ‡ãƒ¼ã‚¿ã‚’ç½®ãã€‚VM_READ|VM_WRITE å±žæ€§ãŒä»˜ã„ã¦ã„ã‚‹(ä»¥ä¸‹åŒæ§˜)ã€‚å…±æœ‰ä¸ å¯ã€‚ãƒ•ã‚¡ã‚¤ãƒ«ã«åˆæœŸå€¤ãŒå«ã¾ã¦ã„ã‚‹ã€‚ BSS(åˆæœŸå€¤ç„¡ã—ãƒ‡ãƒ¼ã‚¿) 0 ã§åˆæœŸåŒ–ã•ã‚Œã‚‹ãƒ‡ãƒ¼ã‚¿ã‚’ç½®ãã€‚ãƒ•ã‚¡ã‚¤ãƒ«ã«åˆæœŸå€¤ãŒå«ã¾ã‚Œãªã„ã€‚ ãƒ’ãƒ¼ãƒ— ãƒ‡ãƒ¼ã‚¿ã‚’ç½®ãã€‚malloc() ã®åŽŸè³‡(ã®ï¼‘ã¤)ã€‚brk() ã‚„ sbrk() ã‚·ã‚¹ãƒ†ãƒ ãƒ» ã‚³ãƒ¼ãƒ«ã§å¤§ãã•ãŒå¤‰æ›´ã•ã‚Œã‚‹ã€‚ç•ªåœ°ãŒå¤§ãã„æ–¹ã«ä¼¸ã³ã‚‹ã€‚mm_struct ã® start_brk ã¨brk ãŒé–‹å§‹ç•ªåœ°ã¨çµ‚äº†ç•ªåœ°ã‚’ä¿æŒã™ã‚‹ã€‚ ã‚¹ã‚¿ãƒƒã‚¯ é–¢æ•°å‘¼
ilyaletre 2019/07/09
linux

kernel
ãƒªãƒ³ã‚¯
https://dl.acm.org/doi/10.1145/3230718.3230723
ilyaletre 2019/06/13
container

kernel

linux
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