Linuxコンテナã®ä»•çµ„ã¿ / eBPF & Container Study in Fukuoka
「eBPF & ã‚³ãƒ³ãƒ†ãƒŠæƒ…å ±äº¤æ›ä¼š @ ç¦å²¡ã€ã®ç™ºè¡¨è³‡æ–™ã§ã™ã€‚ å‚考ã¨ãªã‚‹æƒ…å ±ã«ã¯PDFä¸ã‹ã‚‰ãƒªãƒ³ã‚¯ã‚’ã—ã¦ã„ã¾ã™ãŒã€è³‡æ–™ä¸ã®ãƒªãƒ³ã‚¯ã¯ Speaker Deck 上ã§ã¯ã‚¯ãƒªãƒƒã‚¯ã§ããªã„ã®ã§ PDF をダウンãƒãƒ¼ãƒ‰ã—ã¦ã”覧ãã ã•ã„。 デモã®å‹•ç”»ã¯ https://asciinema.org/a/BbYc…
Linux eBPFトレーシング技術ã®æ¦‚è«–ã¨ãƒ„ール実装 - ゆã†ã†ãブãƒã‚°
eBPF（extended Berkley Packet Filter）ã¨ã„ã†ç”¨èªžã‚’著者ãŒåˆã‚ã¦ã¿ã‹ã‘ãŸã®ã¯ã€2015å¹´ã”ã‚ã ã£ãŸã€‚最åˆã¯ã€eBPFã‚’ãã®å—é¢ã®ã¨ãŠã‚Šã€ãƒ‘ケットã‚ャプãƒãƒ£ã‚„パケットフィルタリングを担ã†ã ã‘ã®ã€Linuxã®æ–°ã—ã„サブシステムã§ã‚ã‚ã†ã¨èªè˜ã—ã¦ã„ãŸã€‚ã—ã‹ã—ã€å®Ÿéš›ã«ã¯ãã†ã§ã¯ãªã‹ã£ãŸã€‚ システム性能ã®åˆ†æžã®ãŸã‚ã®æ–¹æ³•è«–ã‚’ã¾ã¨ã‚ãŸæ›¸ç±Systems Performance 1 ã®è‘—者ã§æœ‰åãªBrendan GreggãŒã€Linuxã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚µãƒ–システムã¨ã¯ç‰¹ã«é–¢ä¿‚ãªã„文脈ã§ã€å¤å…¸çš„ãªã‚·ã‚¹ãƒ†ãƒ 性能計測ツールã§ã¯è¨ˆæ¸¬ã§ããªã„ã“ã¨ã‚’計測ã™ã‚‹ãƒ„ールを作ã£ã¦ã„ãŸã€‚ãã®è¨ˆæ¸¬ãƒ„ールãŒeBPFã¨ã„ã†æŠ€è¡“ã«ã‚ˆã£ã¦å®Ÿè£…ã•ã‚Œã¦ã„ã‚‹ã“ã¨ã‚’知ã£ãŸã¨ãã«ã€eBPFã«èˆˆå‘³ã‚’ã‚‚ã£ãŸã®ã ã£ãŸã€‚ã¾ãŸã€eBPFã¯ã€ã‚·ã‚¹ãƒ†ãƒ 性能を調ã¹ã‚‹ç”¨é€”以外ã«XDP（eXpress Data Path）ã¨å‘¼ã°ã‚Œã‚‹ãƒ—
ipftrace2ã§å§‹ã‚ã‚‹Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯æŽ¢è¨ª - Qiita
皆ã•ã‚“ã¯Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®å•é¡Œã«ã‚ãŸã£ã¦ã—ã¾ã£ãŸæ™‚ã€ã‚ã‚‹ã„ã¯å˜ãªã‚‹èˆˆå‘³ã§Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®ä¸ã‚’調ã¹ãŸã„ã¨æ€ã„ç«‹ã£ãŸæ™‚ã€ã©ã®ã‚ˆã†ã«ã—ã¦èª¿æŸ»ã‚’進ã‚ã¾ã™ã‹ï¼Ÿã‚«ãƒ¼ãƒãƒ«ã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã« printk を仕込んã§ã‚«ãƒ¼ãƒãƒ«ã‚’å†ã‚³ãƒ³ãƒ‘イルã™ã‚‹ã§ã—ょã†ã‹ï¼Ÿã‚‚ã—ãã¯æœ€åˆã‹ã‚‰ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’èªã‚€ã¨ã„ã†å¼·ã„方もã„らã£ã—ゃるã‹ã‚‚ã—ã‚Œã¾ã›ã‚“。ã©ã¡ã‚‰ã®æ–¹æ³•ã‚‚ãªã‹ãªã‹ã®èŒ¨ã®é“ã§ã™ã€‚ãŠãらãã€ã»ã¨ã‚“ã©ã®æ–¹ã¯æœ€çµ‚çš„ã«ftrace ã‚„bpftraceãªã©ã®Dynamic Tracingツールを使ã£ã¦ã€ã‚«ãƒ¼ãƒãƒ«ã®å‹•ä½œã‚’実際ã«å‹•ã‹ã—ãªãŒã‚‰è¦‹ã‚‹ã¨ã„ã†æ–¹æ³•ã«è‡³ã‚‹ã¨æ€ã„ã¾ã™ã€‚ ã“ã®è¨˜äº‹ã§ã¯ ipftrace2 ã¨ã„ã†Dynamic Tracingツールã®åŸºæœ¬çš„ãªä½¿ã„方をサンプルã¨ã¨ã‚‚ã«ç´¹ä»‹ã—ã¾ã™ã€‚ipftrace2ã¯ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã€ç‰¹ã«ãƒ‘ケット処ç†ã®éƒ¨åˆ†ã‚’トレーシングをã™ã‚‹ã“ã¨ã«ç‰¹åŒ–ã—ãŸä½œã‚Šã«ãªã£ã¦ãŠã‚Šã€
eBPF assembly with LLVM
From C to Object File Down to the Instructions eBPF Step by Step with LLVM Compiling from C to eBPF Assembly Assembling to an ELF Object File A Human-Friendly Output with llvm-objdump Inline Assembly Conclusion This post was left aside as a draft for a long time. Most of it was written in December 2017. I publish it with the hope it can still be helpful today, even though the Cilium guide also cov
How Netflix uses eBPF flow logs at scale for network insight
By Alok Tiagi, Hariharan Ananthakrishnan, Ivan Porto Carrero and Keerti Lakshminarayan Netflix has developed a network observability sidecar called Flow Exporter that uses eBPF tracepoints to capture TCP flows at near real time. At much less than 1% of CPU and memory on the instance, this highly performant sidecar provides flow data at scale for network insight. ChallengesThe cloud network infrast
eBPF - Rethinking the Linux Kernel
ã“ã®ãƒ–ラウザ ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã®ã‚µãƒãƒ¼ãƒˆã¯çµ‚了ã—ã¾ã—ãŸã€‚サãƒãƒ¼ãƒˆã•ã‚Œã¦ã„るブラウザã«ã‚¢ãƒƒãƒ—グレードã—ã¦ãã ã•ã„。
Cloudflare architecture and how BPF eats the world
Cloudflare architecture and how BPF eats the world2019-05-18 Recently at Netdev 0x13, the Conference on Linux Networking in Prague, I gave a short talk titled "Linux at Cloudflare". The talk ended up being mostly about BPF. It seems, no matter the question - BPF is the answer. Here is a transcript of a slightly adjusted version of that talk. At Cloudflare we run Linux on our servers. We operate tw
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第15回カーãƒãƒ«/VM探検隊ã§ã®ç™ºè¡¨. eBPFã®ãƒãƒ¼ãƒ€ã®ä»•çµ„ã¿ã‚„Verifierã®ä»•çµ„ã¿ãªã©ã«ã¤ã„ã¦1ã¤ã®eBPFプãƒã‚°ãƒ©ãƒ ã‚’é¡Œæã«æŽ˜ã‚Šä¸‹ã’ã¾ã™.
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