All of Percona’s open-source software products, in one place, to download as much or as little as you need.
Fsync Performance on Storage Devices
All of Percona’s open-source software products, in one place, to download as much or as little as you need.
How io_uring and eBPF Will Revolutionize Programming in Linux
Things will never be the same again after the dust settles. And yes, I’m talking about Linux. As I write this, most of the world is in lockdown due to COVID-19. It’s hard to say how things will look when this is over (it will be over, right?), but one thing is for sure: the world is no longer the same. It’s a weird feeling: it’s as if we ended 2019 in one planet and started 2020 in another. While
Modern storage is plenty fast. It is the APIs that are bad.
I have spent almost the entire last decade in a fairly specialized product company, building high performance I/O systems. I had the opportunity to see storage technology evolve rapidly and decisively. Talking about storage and its developments felt like preaching to the choir. This year, I have switched jobs. Being at a larger company with engineers from multiple backgrounds I was taken by surpri
メモリダンプã¨æ¨¡æ§˜ãŒè¦‹ãˆã‚‹ç”·ï½œkamezawa.hiroyuki
10年以上å‰ã®æ˜”話ã§ã‚ã‚Šã€ãã‚“ãªã“ã¨ã‚‚ã‚ã£ãŸã®ãã¨ã„ã†è©±ã€‚ã‚ã‚‹ã„ã¯ã‚¨ãƒ³ã‚¿ãƒ¼ãƒ—ライズサãƒãƒ¼ãƒˆã£ã¦ãã‚“ãªã“ã¨ã‚„ã£ã¦ã‚‹ã®ãã¨ã„ã†è©±ã€‚ カーãƒãƒ«ãƒ¡ãƒ¢ãƒªãƒ€ãƒ³ãƒ—Linuxカーãƒãƒ«ã‚’エンタープライズã«ä½¿ãŠã†ã¨ã—ãŸä¼æ¥ã€å¯Œå£«é€šã‚„IBMã€æ—¥ç«‹ã¨ã„ã£ãŸä¼æ¥ãŒã“ãžã£ã¦ã‚«ãƒ¼ãƒãƒ«ã«å…¥ã‚Œã‚ˆã†ã¨ã—ãŸæ©Ÿèƒ½ãŒã‚«ãƒ¼ãƒãƒ«ãŒãƒ‘ニックã—ãŸæ™‚ã«ã€Œãªãœã‚³ã‚±ãŸã®ã‹ã€èª¿ã¹ã‚‹ãŸã‚ã®æ©Ÿèƒ½ã§ã‚ã£ãŸã€‚ãã®æœ€ãŸã‚‹ã‚‚ã®ãŒãƒ¡ãƒ¢ãƒªãƒ€ãƒ³ãƒ—ã ã£ãŸã€‚ã“ã®æ©Ÿèƒ½ã¯ã‚«ãƒ¼ãƒãƒ«ãƒ‘ニックãŒèµ·ããŸå¾Œã®ãƒ¡ãƒ¢ãƒªã‚’ディスクã«åã出ã™ã€‚ã“ã®åã出ã•ã‚ŒãŸãƒ¡ãƒ¢ãƒªã‚¤ãƒ¡ãƒ¼ã‚¸ã‚’ダンプã¨å‘¼ã³ã€ã“れをデãƒãƒƒã‚¬ã«é£Ÿã‚ã›ã¦åŽŸå› 調査をã™ã‚‹ã€‚ カーãƒãƒ«ãƒ‡ãƒ™ãƒãƒƒãƒ‘ã¯ãƒ‘ニックãŒèµ·ããŸã‚‰å†ç¾æ¡ä»¶ã‚’探ã—ã¦ç†è©°ã‚ã§ãƒã‚°ã‚’探ã™ã®ãŒå¾—æ„ã ãŒã€é¡§å®¢å…ˆã§ãƒ‘ニックãŒèµ·ããŸã‚‰ã€Œå†ç¾ã•ã›ã¦ãã‚Œã€ã¨ã¯ä¸ã€…言ãˆãªã„ã®ã§ã“ã®æ©Ÿèƒ½ã¯ã‚µãƒãƒ¼ãƒˆã«ã¯é‡è¦ã ã£ãŸã€‚ãã—ã¦ã€ãƒ€ãƒ³ãƒ—調査ã®æŠ€ã‚’æŒã¤ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã‚‚å±…ãŸã€‚ åœ°é›·åž‹ãƒ¡ãƒ¢ãƒªç ´å£Šãƒ‘ãƒ‹ãƒƒã‚¯è‰²ã€…ã¨èª¿
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
Linuxカーãƒãƒ«ã®ãƒ•ã‚¡ã‚¸ãƒ³ã‚°ãƒ„ールsyzkaller / Linux kernel fuzzing tool syzkaller - Speaker Deck
syzkaller/syzbot ã¯ã€2 年㧠1500 件以上㮠Linux カーãƒãƒ«ã®ä¸å…·åˆä¿®æ£ã«è²¢çŒ®ã—ã¦ã„ã¾ã™ã€‚自らãŒç”Ÿæˆã—ãŸè¤‡æ•°ã®ä»®æƒ³ãƒžã‚·ãƒ³ã«å¯¾ã—ã¦å•é¡Œã®èµ·ããã†ãªå…¥åŠ›ã‚’é€ã‚Šç¶šã‘ã‚‹ã“ã¨ã§æœªç™ºè¦‹ã®ä¸å…·åˆã‚’発見ã—ã¾ã™ã€‚最å°é™ã®å…¥åŠ›ã§ä¸å…·åˆã‚’å†ç¾ã•ã›ã‚‹ãŸã‚ã®å†è©¦è¡Œã‚’ç¹°ã‚Šè¿”ã—ã€æœ€çµ‚çš„ã«ã¯ä¸å…·åˆã‚’å†ç¾ã™ã‚‹â€¦
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YOW! 2018 Brendan Gregg - Cloud Performance Root Cause Analysis at Netflix #YOW
At Netflix, improving the performance of our cloud means happier customers and lower costs, and involves root cause analysis of applications, runtimes, operating systems, and hypervisors, in an environment of 150k cloud instances that undergo numerous production changes each week. Apart from the developers who regularly optimize their own code, we also have a dedicated performance team to help wit
PostgreSQLã¯20å¹´é–“ã©ã®ã‚ˆã†ã«fsyncã‚’é–“é•ã£ã¦ä½¿ã£ã¦ã„ãŸã‹ - è´è¬›ãƒ¡ãƒ¢ -
TL;DR è´è¬›ãƒ¡ãƒ¢ Intro into durability PostgreSQLã®CHECKPIONT CHECKPOINTä¸ã«ã‚¨ãƒ©ãƒ¼ãŒç™ºç”Ÿã—ãŸã‚‰ï¼Ÿ fsyncã¸ã®2ã¤ã®é–“é•ã£ãŸæœŸå¾… ãªãœä»Šã«ãªã£ã¦å•é¡ŒãŒæ˜Žã‚‰ã‹ã«ãªã£ã¦ããŸï¼Ÿ ãã‚‚ãã‚‚ãªãœBufferd I/Oãªã®ã‹ï¼Ÿ ã©ã†ã‚„ã£ã¦ç›´ã™ã‹ã‹ å‚考リンク 質疑 最後㫠先日PostgreSQLã®æ–°ã—ã„マイナーãƒãƒ¼ã‚¸ãƒ§ãƒ³ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¾ã—ãŸã€‚ã“ã®ãƒžã‚¤ãƒŠãƒ¼ãƒªãƒªãƒ¼ã‚¹ã§ãƒ¡ã‚¤ãƒ³ã¨ãªã‚‹ä¿®æ£ã¯ã€Œfsync周りã®ãƒã‚°ä¿®æ£ã€ã§ã€ã“ã®ãƒã‚°ã¯é–“é•ã£ãŸfsyncã«å¯¾ã™ã‚‹é–“é•ã£ãŸèªè˜ã‹ã‚‰ç´„20å¹´é–“å˜åœ¨ã—ã¦ãŸãƒã‚°ã¨ã„ã†ã“ã¨ã§æ³¨ç›®ã•ã‚Œã¦ã„ã¾ã—ãŸã€‚ ã“ã®ãƒã‚°ã«ã¤ã„ã¦PostgreSQLã®ã‚³ãƒŸãƒƒã‚¿(Tomas Vondraæ°)ãŒè§£èª¬ã—ã¦ã„るセッションãŒã€å…ˆã€…週開催ã•ã‚ŒãŸFOSDEM 2019ã§ã‚ã‚Šã¾ã—ãŸã€‚ç§ã‚‚FOSDEM 2019ã«å‚åŠ ã—ã¦ã„ãŸã®ã§ã™ãŒãã®éš›ã¯è£ã‚»ãƒƒã‚·ãƒ§ãƒ³
The future of DAX [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 DAX is the mechanism that enables direct access to files stored in persistent memory arrays without the need to copy the data through the page cache. At the 2017 Linux Storage, Filesystem, and Memory-Management Summit, Ross Zwisler led a plenary sessio
![The future of DAX [LWN.net]](https://cdn-ak-scissors.b.st-hatena.com/image/square/efc757f9481dae02fa71a6bd8bf056ca03cdb41b/height=288;version=1;width=512/https%3A%2F%2Fstatic.lwn.net%2Fimages%2Fconf%2F2017%2Flsfmm%2FRossZwisler-sm.jpg)
linux-sched-history.pdf - Speaker Deck
見ãˆã¥ã‚‰ã„活動ã®æˆæžœã®ä¼ãˆæ–¹ã¯æ—¥é ƒã‹ã‚‰ã‚ã¡ã‚ƒãã¡ã‚ƒæ‚©ã‚“ã§ã‚‹ã‘ã©ã€å®Ÿéš›ã“ã‚“ãªå–り組ã¿ã‚’ã—㪠ãŒã‚‰æ¸©åº¦æ„Ÿã‚’åˆã‚ã›ã«ã„ã£ã¦ã‚‹ã‚ˆ / Conveying Hard-to-See Results
Creating a vDSO: the Colonel's Other Chicken | Linux Journal
A vDSO (virtual dynamic shared object) is an alternative to the somewhat cycle-expensive system call interface that the GNU/Linux kernel provides. But, before I explain how to cook up your own vDSO, in this brief jaunt down operating system lane, I cover some basics of vDSOs, what they are and why they are useful. The main purpose of this article is to illustrate how to add a custom vDSO to a Linu
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Snap: a Microkernel Approach to Host Networking
YOW2018 Cloud Performance Root Cause Analysis at Netflix
https://events.static.linuxfound.org/sites/events/files/lcjpcojp13_shaohua.pdf
Still waiting for swap prefetch [LWN.net]
Re: RSDL v0.31 [LWN.net]
Swap prefetching [LWN.net]
https://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=5388507&punumber=5288519
What are vdso and vsyscall?
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