Linux Profiling at Netflix
This talk discusses Linux profiling using perf_events (also called "perf") based on Netflix's use of it. It covers how to use perf to get CPU profiling working and overcome common issues. The speaker will give a tour of perf_events features and show how Netflix uses it to analyze performance across their massive Amazon EC2 Linux cloud. They rely on tools like perf for customer satisfaction, cost o
sysã®CPU使用率ãŒé«˜ã„å ´åˆã«ãã®å†…訳を調ã¹ã‚‹æ–¹æ³• - ablog
OSレベル㧠sys ã®CPU使用率ãŒé«˜ã„å ´åˆã« perf*1 を使ã£ã¦ã€ä½•ã®å‡¦ç†ã®å‰²åˆãŒé«˜ã„ã‹èª¿ã¹ã‚‹æ–¹æ³•ã§ã™ã€‚ perf 㯠特定ã®ãƒ—ãƒã‚»ã‚¹ã ã‘ã§ãªãOS全体ã®çµ±è¨ˆã‚’見れる カーãƒãƒ«ï¼ˆsys）ã¨ãƒ¦ãƒ¼ã‚¶ãƒ¼ï¼ˆuser）ã®ä¸¡æ–¹ã‚’見れる ã¨ã“ã‚ãŒéžå¸¸ã«ä¾¿åˆ©ã ã¨æ€ã†*2。 準備 ã²ãŸã™ã‚‰ write システムコールを発行ã—続ã‘るプãƒã‚°ãƒ©ãƒ を作æˆã™ã‚‹ $ cat write_loop.c #include <unistd.h> int main(void) { while(1) { write(1, "foo\n", 4); } } コンパイルã™ã‚‹ $ gcc write_loop.c -o write_loop 実行権é™ã‚’付与ã™ã‚‹ $ chmod u+x write_loop 検証 ã²ãŸã™ã‚‰writeシステムコールを発行ã™ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ を実行ã™ã‚‹ $ ./write_loop > /dev/null
Etsy: サイトパフォーマンスã®å®šæœŸå ±å‘Š - ワザノム| wazanova.jp
http://codeascraft.com/2013/10/14/september-2013-site-performance-report/ EtsyãŒå››åŠæœŸã«ä¸€åº¦ã®ã‚µã‚¤ãƒˆãƒ‘フォーマンスã®ãƒ¬ãƒãƒ¼ãƒˆã‚’発表ã—ã¦ã¾ã™ã€‚ 1) サーãƒã‚µã‚¤ãƒ‰ãƒ‘フォーマンス [グラフ] 9/18時点ã§ã®ä¸»è¦å„ページã«ãŠã‘ã‚‹ãƒã‚°ã‚¤ãƒ³ãƒ¦ãƒ¼ã‚¶ã®ãƒãƒ¼ãƒ‰æ™‚é–“ã®ä¸å¤®å€¤ã¨ã€ä¸‹ä½5%ã«ä½ç½®ã™ã‚‹ï¼ˆã‚‚ã—全員ã§100人ã®å ´åˆã¯95人目）ユーザã®å€¤ã§ã™ã€‚ データã«å¤§ããªå¤‰åŒ–ã¯ãªã—。ä¸å¤®å€¤ãŒã€62ms〜334msã¨ã€ãã“ãã“良ã„水準ã«ã‚ã‚‹ã®ã§ã€æ•°å€¤ãŒæ‚ªåŒ–ã•ã›ãªã„ã“ã¨ã ã‘ã«æ³¨åŠ›ã—ã€è‹¥å¹²ã®ã‚³ãƒ¼ãƒ‰å¤‰æ›´ã‚’ã—ãŸã®ã¿ã€‚ 2) シミュレーション基準ã®ãƒ•ãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰ãƒ‘フォーマンス [グラフ] WebPageTestã®ãƒ—ライベートインスタンスを利用ã—ã¦è¨ˆæ¸¬ã€‚DSLコãƒã‚¯ã‚·ãƒ§ãƒ³ã§ã€IE8 / IE9 / Firefox / ChromeãŒå¯¾è±¡ã€‚24時間計測
Tuning Your System With Tuned
by Wander Boessenkool (Red Hat) Tuning systems can be a time consuming art. Not only does it involve extensive profiling of your systems, as well as continuous monitoring, but keeping tuning setting applied continuously can be quite a chore as well. Especially if the tuning needs of your systems change throughout the day. Imagine a database system that is used to process orders from customers. In
WCAN 2013 Summer ã§ã€Œãƒã‚¤ãƒ‘フォーマンスWebフãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰ã€ã‚’話ã—ã¦ãã¾ã—ãŸ
スライド 振り返り 50分ã¨ã„ã†é™ã‚‰ã‚ŒãŸæ™‚é–“ã®ä¸ã§ã€Network・Render・Computeã¨ã„ã†3本柱ã«ã¤ã„ã¦ã”紹介ã™ã‚‹ã¨ã„ã†æ§‹æˆã«æŒ‘ã¾ã›ã¦ã„ãŸã ãã¾ã—ãŸã€‚ æらãフãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰ãŒå°‚é–€ã§ãªã„方も多ãã„らã—ãŸä¸ã§ã€ã©ã“ã¾ã§ãƒ‹ãƒ¥ã‚¢ãƒ³ã‚¹ã ã‘ã§ã‚‚届ã‘られるよã†ã«ã€ã¨ã„ã†é¢ã®èª¿æ•´ãŒå¤šã‹ã£ãŸã§ã™ã€‚ çµæžœçš„ã«ã¯ç›®ã«è¦‹ãˆã‚‹Renderã«ã¤ã„ã¦å¤šã‚ã«ç››ã‚Šè¾¼ã‚“ã§ç€åœ°ã—ã¦ã„ã¾ã™ã€‚ WebKitä¾å˜ã®å†…容ãŒå¤šã‚ã®æ‰€ã‹ã‚‰ã€Canaryã«è¼‰ã£ã¦ã„る開発者ツールã®ä½¿ã„方を通ã—ã¦ã€ãƒ‘フォーマンスå•é¡Œã®æ¤œè¨¼ã¨å¯¾ç–ã«ã¤ã„ã¦è‚‰ä»˜ã‘ã—ã¦ã„る構æˆã§ã™ã€‚ å‚考ã«ã—ãŸè³‡æ–™ã®URLリスト å°Žå…¥ã®ã‚ãŸã‚Š 開発者ã®ãŸã‚ã® WebKit (“WebKit for Developers†日本語訳) Performance Checklist for the Mobile Web - YouTube Strangeloop - Impac
High Performance Web Frontend
★追記： https://speakerdeck.com/ahomu/high-performance-web-frontend-2013-qiu ã®ã»ã†ãŒãƒ–ラッシュアップ版ã§ã™ WCAN 2013 Summer (7/6) ã§è¡Œã‚ã‚ŒãŸã€"High Performance Web Frontend…
WebPagetest - Website Performance and Optimization Test
Test. Experiment. Improve! WebPageTest. The gold standard in web performance testing. Lightning-Fast Web Performance Online CourseLearn to analyze performance, fix issues, and deliver fast websites from the start. Free! Start Course Now >> Introducing Carbon Control Experimental New in WebPageTest! Measure your site's carbon footprint and run No-Code Experiments to find ways to improve.
Webパフォーマンス ベストプラクティス - Make the Web Faster
Webパフォーマンス ベストプラクティス Last updated: 02 October 2012 翻訳：@t32k WebページをPage Speedã§èª¿ã¹ã‚‹ã¨ãƒ«ãƒ¼ãƒ«ã«æº–æ‹ ã—ã¦ã„ãªã„ã‚‚ã®ãŒæ示ã•ã‚Œã‚‹ã€‚ã“ã®ãƒ«ãƒ¼ãƒ«ã¨ã„ã†ã®ã¯ã€ä¸€èˆ¬çš„ã«ã‚ãªãŸãŒé–‹ç™ºæ®µéšŽã«ãŠã„ã¦å–り入れるã¹ãフãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰ã®ãƒ™ã‚¹ãƒˆãƒ—ラクティスã 。ã‚ãªãŸãŒPage Speedを使用ã—よã†ã¨ã—ã¾ã„ã¨ã€ç§ãŸã¡ã¯ã“ã®å„ルールã«ã¤ã„ã¦ã®ãƒ‰ã‚ュメントをæä¾›ã™ã‚‹ï¼ˆãŸã¶ã‚“ã¡ã‚‡ã†ã©æ–°ã—ã„サイトを開発ä¸ã§ãƒ†ã‚¹ãƒˆã™ã‚‹æº–å‚™ãŒæ•´ã£ã¦ãªã„ã ã‚ã†ï¼‰ã€‚ã‚‚ã¡ã‚ã‚“ã€ã“れらã®ãƒšãƒ¼ã‚¸ã¯ã„ã¤ã§ã‚‚å‚ç…§ã™ã‚‹ã“ã¨ãŒã§ãる。ç§ãŸã¡ã¯ã‚ãªãŸã®é–‹ç™ºãƒ—ãƒã‚»ã‚¹ã«å–り入れã¦ã‚‚らã†ãŸã‚ã«ã€ã“ã®ãƒ™ã‚¹ãƒˆãƒ—ラクティスを実装ã™ã‚‹ãŸã‚ã®æ˜Žç¢ºãªãƒ†ã‚£ãƒƒãƒ—スã¨æ案をæä¾›ã™ã‚‹ã€‚ パフォーマンス ベストプラクティスã«ã¤ã„㦠Page Speedã¯ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆå´ã‹ã‚‰ã®è¦³ç‚¹ã§ãƒ‘フォーマンスを評価ã—ã€ä¸€èˆ¬çš„ã«ãƒšãƒ¼
IOPS - Wikipedia
The neutrality of this article is disputed. Relevant discussion may be found on the talk page. Please do not remove this message until conditions to do so are met. (August 2016) (Learn how and when to remove this message) Input/output operations per second (IOPS, pronounced eye-ops) is an input/output performance measurement used to characterize computer storage devices like hard disk drives (HDD)
Yahoo! UI Library: YUI Compressor
According to Yahoo!'s Exceptional Performance Team, 40% to 60% of Yahoo!'s users have an empty cache experience and about 20% of all page views are done with an empty cache (see this article by Tenni Theurer on the YUIBlog for more information on browser cache usage). This fact outlines the importance of keeping web pages as lightweight as possible. Improving the engineering design of a page or a
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SystemTapã§MySQLã®Disk I/Oを分æžã™ã‚‹ - SH2ã®æ—¥è¨˜
実験エントリã§ã™ã€‚ å‹•æ©Ÿ Oracleã®Statspack/AWRã§å–れるファイルå˜ä½ã®Disk I/Oæƒ…å ±ã‚’ã€MySQLã§ã‚‚採å–ã—ãŸã„。ã“ã‚Œã¯æ¬¡ã«ç¤ºã™ã‚ˆã†ãªãƒ‡ãƒ¼ã‚¿ã§ã™ã€‚ File IO Stats DB/Inst: ORA112/ORA112 Snaps: 6-7 ->Mx Rd Bkt: Max bucket time for single block read ->ordered by Tablespace, File Tablespace Filename ------------------------ ---------------------------------------------------- Av Mx Av Av Rd Rd Av Av Buffer BufWt Reads Reads/s (ms) Bkt Blks/Rd Writes Writes/s Wai
Browser Performance
The latest versions of the top five major web browsers were tested under six performance indicators to see how much they stack up against each other. Browsers were tested three times with unprimed caches except during caching performance benchmarks. The mean values are reported below. Faster JavaScript execution times means that Ajax-heavy sites like Digg and webapps like Gmail will be more respon
CSS Sprite Generator, Editor, and Code
What are CSS Sprites CSS sprites are a way to reduce the number of HTTP requests made for image resources referenced by your site. Images are combined into one larger image at defined X and Y coorindates. Having assigned this generated image to relevant page elements the background-position CSS property can then be used to shift the visible area to the required component image. This technique can
Google Code Blog: Introducing Page Speed
At Google, we focus constantly on speed; we believe that making our websites load and display faster improves the user's experience and helps them become more productive. Today, we want to share with the web community some of the best practices we've used and developed over the years, by open-sourcing Page Speed. Page Speed is a tool we've been using internally to improve the performance of our we
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Yahoo!パフォーマンスãƒãƒ¼ãƒ ã€æœ€æ–°é«˜é€ŸåŒ–ルール20を発表 | エンタープライズ | マイコミジャーナル
Webアプリケーション開発ã«æ¬ ã‹ã›ãªã„Firefoxエクステンションã§ã‚ã‚‹Firebugをベースã«ã—ã¦é–‹ç™ºã•ã‚ŒãŸWebページã®ãƒ‘フォーマンス計測ツールã«YSlowãŒã‚る。2007å¹´12月上旬ã«ã¯ãƒ‘フォーマンス分æžèƒ½åŠ›ã‚’å‘上ã•ã›ãŸYSlow 0.9ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚ŒãŸã€‚紹介ã«ã‚‚ã‚るよã†ã«ã€æ‰‹è»½ã«å°Žå…¥ã§ãã‚‹ã†ãˆã«ã‹ãªã‚ŠåŠ¹æžœçš„ã«åˆ†æžãŒã§ãã‚‹ã¨ã“ã‚ã«ç‰¹å¾´ãŒã‚る。 YSlowã®å¼·ã¿ã¨ãªã£ã¦ã„ã‚‹ã®ã¯Yahoo! Exceptional Performanceãƒãƒ¼ãƒ ãŒåˆ†æžã—ãŸè©•ä¾¡åŸºæº–をベースã«ã—ã¦ã„る点ã«ã‚る。Yahoo!ãŒå®Ÿéš›ã«åˆ†æžã—ãŸçµæžœã‚’ベースã«ã—ã¦ã„ã‚‹ã ã‘ã‚ã£ã¦åŠ¹æžœãŒç¢ºå®Ÿãªã‚‚ã®ã¨ã—ã¦åŠ¹ã„ã¦ãã‚‹ã‚ã‘ã 。 ãã®Yahoo! Exceptional Performanceãƒãƒ¼ãƒ ã‹ã‚‰æœ€æ–°ã®èª¿æŸ»çµæžœãŠã‚ˆã³ãƒ‘フォーマンスブレークスルーã®ãŸã‚ã®æ–°ã—ã„ルールãŒç™ºè¡¨ã•ã‚ŒãŸã€‚æ—¢å˜ã®14ã®ãƒ«ãƒ¼ãƒ«ã«åŠ ãˆã¦ã€æ–°ã—ã20ã®ãƒ«ãƒ¼
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GitHub - edwardbadboy/tuned-ubuntu: Build and install tuned in Ubuntu
Real-Time Web App Performance Monitoring : New Relic
Web ページを高速化ã™ã‚‹
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