Evolution of the x86 context switch in Linux – MaiZure's Projects
September 2018 While researching archaic facts about the 80386 hardware context switch last weekend, I remembered that early versions of the Linux kernel relied on it. I was promptly sidetracked for hours reading code I hadn't seen in years. This weekend, I've decided to write down the journey to consolidate all the nuggets of fun stuff I discovered along the way. The exercise: Trace the context s
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Linux OSã®ã‚¸ãƒƒã‚¿ã‚’体系的ã«å‰Šæ¸›ã™ã‚‹é»’é”è¡“ | FAworksブãƒã‚°
低é…延性ã®æ±‚ã‚られるトレードシステムã«ãŠã„ã¦ã€ã‚¸ãƒƒã‚¿ã®åŽŸå› ã‚’ã©ã®ã‚ˆã†ã«ä½“系的ã«ç™ºè¦‹ã—ã¦ã²ã¨ã¤ãšã¤å‰Šé™¤ã™ã‚‹ã®ã‹ï¼Ÿã“ã®è³ªå•ã¯mechanical-sympathyã®ãƒ¡ãƒ¼ãƒªãƒ³ã‚°ãƒªã‚¹ãƒˆã§æ示ã•ã‚Œã¾ã—ãŸã€‚ アズール・システムズã®æŠ€è¡“担当副社長兼CTOã§ã‚ã‚Šã€å…±åŒå‰µæ¥è€…ã§ã‚ã‚‹Gil Teneæ°ã¯ã“ã®è³ªå•ã«å¯¾ã—ã¦è±Šå¯Œãªå®ŸçµŒé¨“ã‹ã‚‰ç”Ÿã¾ã‚ŒãŸã€è“„ç©ã•ã‚ŒãŸçŸ¥æµã‚’用ã„ã¦å›žç”ã—ã¾ã—ãŸã€‚ãã‚Œã¯åºƒã共有ã•ã‚Œã‚‹ã¹ã回ç”ã§ã™ã®ã§ã€ã“ã“ã«ç´¹ä»‹ã—ã¾ã™ã€‚ Linuxシステムã«ãŠã‘る一次的ä¸æ– (“hiccupâ€) やジッタã®åŽŸå› を見ã¤ã‘ã‚‹ã“ã¨ã¯ã»ã¼é”è¡“ã¨è¨€ãˆã¾ã™ã€‚人々ã¯ã—ã°ã—ã°æ€¥ãªCPU使用率ã®ä¸Šæ˜‡ã‚’見ã¦ã€Œã“ã®åŽŸå› ã¯ä¸€ä½“何ã ã‚ã†ã€ã¨æƒ³åƒã‚’ã‚ãらã›ã¾ã™ã€‚ ç§ã®å ´åˆã¯ã€çµŒé¨“上ã®è¨¼æ‹ （ã“ã‚Œã¾ã§æ‰‹æŽ›ã‘ãŸæ•°å個ã®ã‚µã‚¤ãƒˆã«å…±é€šã™ã‚‹ï¼‰ã‚„ä»–ã®æŠ€è¡“者ã¨ã®æƒ…å ±äº¤æ›ã«åŸºã¥ãã€ç§ã®å¥½ã¿ã«åˆã‚ãªã„è¨å®šã«ãªã£ã¦ã„ã¦ã€ã‹ã¤ã‚·ã‚¹ãƒ†ãƒ レベルã®ä¸€æ™‚çš„ä¸æ–ãŒç™ºè¦‹ã•ã‚Œ
LinuxCon 2015 Linux Kernel Networking Walkthrough
This presentation features a walk through the Linux kernel networking stack for users and developers. It will cover insights into both, existing essential networking features and recent developments and will show how to use them properly. Our starting point is the network card driver as it feeds a packet into the stack. We will follow the packet as it traverses through various subsystems such as p
FlexSC-Threadsã®ç´¹ä»‹ -プãƒã‚°ãƒ©ãƒ ã®å¤‰æ›´ç„¡ã—ã«ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ãƒ—ãƒã‚»ã‚¹ã‚’高速化
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Linux Kernel 3.0以é™ã«ã¤ã„ã¦èª¿ã¹ã¦ã¿ãŸ - Qiita
é•·ã„ã®ã§å¤ªå—ã§è¦ç‚¹ 絞るãŸã‚ã«GPUã€ä»®æƒ³é–¢ä¿‚ã¯çœã„ã¦ã¾ã™ã€‚ NWãŒé•·ããªã£ãŸã®ã§åˆ†å‰² http://qiita.com/bringer1092/items/b6cd96a7f7db7121e8a7 I/OãŒé•·ããªã£ãŸã®ã§åˆ†å‰² http://qiita.com/bringer1092/items/4a62ec6ab62b896ab611 ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã‚µãƒãƒ¼ãƒˆ 4.6 USB 3.1 SuperSpeedPlus (10 Gbps) support USB3.1ã®ã‚µãƒãƒ¼ãƒˆ SuperSpeedPlus (10 Gbps)サãƒãƒ¼ãƒˆ 4.12 USB Type-C support USB Type-Cã®ã‚µãƒãƒ¼ãƒˆ Type-Cã«ã¤ã„ã¦èª¿ã¹ã‚‹ã¨USB PD(最大100Wã®é›»åŠ›)è¦æ ¼ã€æ˜ åƒå‡ºåŠ›ç”¨ã«å¯¾å¿œ ã‚»ã‚ュリティ周り 何を載ã›ã‚‹ã‹ç²’度ãŒäººã«ã‚ˆã£ã¦å¤§ãã異る㌠3.11 New O_TMPFILE o
Lynis - Security auditing and hardening tool for Linux/Unix
Lynis, an introductionAuditing, system hardening, compliance testingLynis is a battle-tested security tool for systems running Linux, macOS, or Unix-based operating system. It performs an extensive health scan of your systems to support system hardening and compliance testing. The project is open source software with the GPL license and available since 2007. Security scan with Lynis (click for ful
Linuxã®å„タスクã«ãŠã‘ã‚‹ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒªãƒ³ã‚°çµ±è¨ˆæƒ…å ± (procfs) - Qiita
$ cat /etc/os-release NAME="Ubuntu" VERSION="14.04.4 LTS, Trusty Tahr" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 14.04.4 LTS" VERSION_ID="14.04" HOME_URL="http://www.ubuntu.com/" SUPPORT_URL="http://help.ubuntu.com/" BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/" $ cat /proc/1/sched init (1, #threads: 1) ------------------------------------------------------------------- se.exec_start : 176
Other Linux Distributions Begin Analyzing Clear Linux's Performance Optimizations - Phoronix
Other Linux Distributions Begin Analyzing Clear Linux's Performance Optimizations Written by Michael Larabel in Clear Linux on 24 April 2016 at 09:55 AM EDT. 62 Comments Fedora developers appear to be among those analyzing Intel's Clear Linux distribution for the performance optimizations made. In case you haven't been following our many original performance tests in the past months, Intel's Clear
Rust + nix = easier unix systems programming <3
Lately I’m writing lots of Rust, and I’m particularly interested in systems programming on unix. I’ve been using and contributing to a library called nix1, whose mission is to provide ‘Rust friendly bindings to *nix APIs’. In this blog post, I hope to convince you that you might want to reach for Rust and nix the next time you need to do some unix systems programming, especially if you aren’t flue
GitHub - netdata/netdata: Architected for speed. Automated for easy. Monitoring and troubleshooting, transformed!
Visit the Project's Home Page MENU: GETTING STARTED | HOW IT WORKS | FAQ | DOCS | COMMUNITY | CONTRIBUTE | LICENSE Important 💡 People get addicted to Netdata. Once you use it on your systems, there's no going back! Netdata is a high-performance, cloud-native, and on-premises observability platform designed to monitor metrics and logs with unparalleled efficiency. It delivers a simpler, faster, an
Trickleを使ã£ã¦å¸¯åŸŸåˆ¶é™ã‚’ã™ã‚‹ - aptheia.info
ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯çµŒç”±ã§å¤§é‡ã®ãƒ‡ãƒ¼ã‚¿ã‚’ã‚„ã‚Šã¨ã‚Šã—ãŸã„ãŒã€ãƒ¡ã‚¤ãƒ³ã®ã‚µãƒ¼ãƒ“スã«ã¯å½±éŸ¿ã‚’与ãˆãŸããªã„ã¨ã„ã†å ´åˆãŒã‚ˆãã‚る。rsyncã‚„scp ãªã©ã€å¤§ããªãƒ•ã‚¡ã‚¤ãƒ«ã®è»¢é€ã‚’考慮ã•ã‚ŒãŸã‚³ãƒžãƒ³ãƒ‰ã§ã¯ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯å¸¯åŸŸã‚’制é™ã™ã‚‹ã‚ªãƒ—ションãŒç”¨æ„ã•ã‚Œã¦ã„ã‚‹ã“ã¨ã‚‚多ã„ãŒã€è‡ªä½œã®ãƒ„ールãªã©ã«å¸¯åŸŸåˆ¶é™ã‚’実装ã™ã‚‹ã¨ãªã‚‹ã¨ã‹ãªã‚Šé¢å€’ãã•ã„ã“ã¨ã«ãªã‚‹ã€‚ Linux ã§å¸¯åŸŸåˆ¶é™ã‚’ã—ãŸã„å ´åˆã€tc ã‚„ cgroup を使ã†æ–¹æ³•ãŒã‚ˆã知られã¦ã„る。ãŸã ã€ã€Œã‚るコマンドã«ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãŒå é ˜ã•ã‚Œãªã„よã†ã«ç©ã‚„ã‹ã«å®Ÿè¡Œã—ãŸã„ã€ã¨ã„ã†ãƒ‹ãƒ¼ã‚ºã«å¯¾ã—ã¦ã¯å¤§ã’ã•ã§ã€ã¾ãŸã‚ªãƒ—ションãŒé›£è§£ã ã£ãŸã‚Šç®¡ç†æ¨©é™ãŒå¿…è¦ã ã£ãŸã‚Šã¨ã„ã£ãŸã“ã¨ã‹ã‚‰äºŒã®è¶³ã‚’è¸ã‚€æ„Ÿã˜ã®ã‚‚ã®ã ã£ãŸã€‚ã‚‚ã£ã¨æ™®æ®µä½¿ã„ã«é©ã—ãŸãƒ„ールãŒãªã„ã‚‚ã®ã‹ã¨æŽ¢ã—ã¦ã„ãŸã¨ã“ã‚ã€ã“ã†ã„ã£ãŸã‚·ãƒ¼ãƒ³ã§ã¯TricleãŒã‹ãªã‚Šæœ‰åŠ¹ã ã¨è¨€ã†ã“ã¨ãŒã‚ã‹ã£ãŸã€‚ インストール Debian, Ubuntu ãªã‚‰å…¬å¼ã‹ã‚‰ãƒ‘
LKML: Kent Overstreet: [ANNOUNCE] bcachefs - a general purpose COW filesystem
For those who haven't kept up with bcache, the bcache codebase has been evolving/metastasizing into a full blown, general purpose posix filesystem - a modern COW filesystem with checksumming, compression, multiple devices, caching, and eventually snapshots and all kinds of other nifty features. "Yet another new filesystem? Why?" Well, years ago (going back to when I was still at Google), I and the
Reducing Memory Access Latency
Satoru Moriya <satoru.moriya.br@hitachi.com> Linux Technology Center Yokohama Research Lab. Hitachi, Ltd Copyright (c) 2013 Hitachi LTD., Systems Development Lab. All right reserved Reducing Memory Access Latency Copyright (c) 2013 Hitachi LTD., Systems Development Lab. All right reserved 2 Contents 1. Introduction 2. Issues 3. solution Copyright (c) 2013 Hitachi LTD., Systems Development Lab. All
Linux Advent Calendar 2014 14日目: sched-design-CFS.txtã®å’Œè¨³ - hiraku_wfsã®æ—¥è¨˜
Linux Advent Calendar 2014 ã“ã‚“ã«ã¡ã¯ã€hiraku_wfsã§ã™ã€‚ 今年ã¯Linux Kernelã®Documentation/scheduler/sched-design-CFS.txtを和訳ã—ã¦ã¿ã¾ã—ãŸã€‚ éŽåŽ»ã«ã¯2009å¹´é ƒã«syuu1228ã•ã‚“ãŒæ©Ÿæ¢°ç¿»è¨³ãƒ™ãƒ¼ã‚¹ã®å’Œè¨³ã‚’試ã¿ã¦ã„ã¾ã™ï¼ˆsched-design-CFS.txtã®å’Œè¨³ - syuu1228's blog）ãŒã€ä»Šå›žv3.18-rc7ã®ã‚‚ã®ã‚’訳ã—ã¦ã¿ã¾ã™ã€‚ ã¨ã“ã‚ã©ã“ã‚（ã¡ã‚‡ã£ã¨ã‚„ã‚Šã™ãŽã‹ã‚‚ã—ã‚Œãªã„）æ„訳を入れã¦ã„ã¾ã™ã€‚ ï¿½å ´æ‰€ã«ã‚ˆã£ã¦ã¯åŽŸæ–‡ã‚’見ãŸæ–¹ãŒåˆ†ã‹ã‚Šã‚„ã™ã„箇所ãŒã„ãã¤ã‹ã‚ã‚‹ã®ã§ã€åŽŸæ–‡ã¨ä½µè¨˜ã—ã¦ã„ã¾ã™ã€‚ （やã£ã±ã‚Šç¿»è¨³ã®å°‚門家ã§ã¯ãªã„ã®ã§æ—¥æœ¬èªžã§ã©ã†è¡¨ç¾ã—ãŸã‚‚ã®ã‹æ‚©ã‚“ã ã‚Šã¨çµæ§‹å¤§å¤‰ã§ã—ãŸ...） 原著作者: Ingo Molnar ============= CFS Scheduler CFSス
How to receive a million packets per second
Last week during a casual conversation I overheard a colleague saying: "The Linux network stack is slow! You can't expect it to do more than 50 thousand packets per second per core!" That got me thinking. While I agree that 50kpps per core is probably the limit for any practical application, what is the Linux networking stack capable of? Let's rephrase that to make it more fun: On Linux, how hard
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GitHub - leandromoreira/linux-network-performance-parameters: Learn where some of the network sysctl variables fit into the Linux/Kernel network flow. Translations: 🇷🇺
GitHub - vi/fdlinecombine: Read multiple fds and print data to stdout linewise.
Modern Linux service isolation
GitBook – Knowledge management for technical teams
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