Erlang vs Java memory architecture - Java Code Geeks
I read a really, really interesting article on memory management strategies for the Erlang VM. It was written as a thesis by Jesper Wilhelmsson I thought it might be nice to discuss the differences between Erlang‘s memory setup and Oracle’s Java VM. As a real short introduction for those who have never heard of Erlang; it is a functional language that uses asynchronous message passing as its basis
本当ã«1.5å€ã®ã»ã†ãŒãƒ¡ãƒ¢ãƒªåŠ¹çŽ‡ãŒã‚ˆã„ã®ã‹ - inamori’s diary
C++ã®std::vectorã«push_backã—ã¦ã„ãã¨ã€ã‚ã‚‹é ˜åŸŸã‚’ç¢ºä¿ã—ã¦ã€ãれを超ãˆãã†ã«ãªã£ãŸã‚‰ã¾ãŸã‚る程度ゆã¨ã‚Šã®ã‚ã‚‹é ˜åŸŸã‚’ç¢ºä¿ã™ã‚‹ã¨ã„ã†æ©Ÿæ§‹ã«ãªã£ã¦ã„ã¾ã™ã€‚ ï¼’å€ã ã‘ã˜ã‚ƒãªã„ - d.y.d. ã«ã¾ã¨ã‚ã¦ã‚ã‚Šã¾ã™ãŒã€std::vectorã‚„é¡žä¼¼ã™ã‚‹ã‚³ãƒ³ãƒ†ãƒŠã¯2å€ãšã¤é ˜åŸŸã‚’大ããã—ã¦ã„ãã®ã‹ã¨æ€ã„ãã‚„ã€1.5å€ã¨ã„ã†ã®ã‚‚多ã„ã‚“ã§ã™ã。実際ã«VC10 beta2ã§å‹•ã‹ã—ã¦ã¿ã‚‹ã¨ã€ #include <iostream> #include <vector> int main() { std::vector<int> v; for(int i = 0; i < 100; i++) { const std::vector<int>::size_type old_cap = v.capacity(); v.push_back(i); const std::vector<int>::siz
d.y.d. 2å€ã ã‘ã˜ã‚ƒãªã„
10:01 10/07/20 ãã‚Œã§ã‚‚ï¼’å€ã 先日ã®vectorã®ä¼¸é•·åº¦åˆã„ã®è¨˜äº‹ã«é–¢ã—㦠本当ã«1.5å€ã®ã»ã†ãŒãƒ¡ãƒ¢ãƒªåŠ¹çŽ‡ãŒã‚ˆã„ã®ã‹ ã¨ã„ã†å応をã„ãŸã ãã¾ã—ãŸã€‚ã¨ã¦ã‚‚興味深ã„。ã¿ã‚“ãªèªã¿ã¾ã—ょã†ã€‚ 自分ã®ç†è§£ãƒ¡ãƒ¢ï¼š 「å†åˆ©ç”¨ãŒã§ãã‚‹ã‹ã‚‰å¬‰ã—ã„ã€ç‰ã®è°è«–ã‚’ã™ã‚‹ãªã‚‰ã€ 今ã¾ã§ã«ç¢ºä¿ã—ãŸãƒ¡ãƒ¢ãƒª (1 + r^1 + ... + r^k) ã®ã†ã¡ã€ 有効ã«ä½¿ãˆã¦ã‚‹ãƒ¡ãƒ¢ãƒª r^{k-1} (ãƒãƒƒãƒ•ã‚¡æ‹¡å¤§ç›´å¾Œ) ã‚„ r^k (次ã®ãƒãƒƒãƒ•ã‚¡æ‹¡å¤§ç›´å‰) ã®å‰²åˆã§è©•ä¾¡ã—ã¦ã¿ã‚ˆã†ã˜ã‚ƒãªã„ã‹ã¨ã„ã†ã€‚ ã¾ãšç°¡å˜ã®ãŸã‚ã«å†åˆ©ç”¨ã‚’ã—ãªã„å ´åˆã‚’考ãˆã‚‹ã¨ã€ã“ã®å‰²åˆã¯ãã‚Œãžã‚Œ (r-1)/r^2〠(r-1)/r ã«ãªã‚Šã¾ã™ï¼ˆé€”ä¸è¨ˆç®—略）。 ã“ã®åˆ©ç”¨çŽ‡ãŒæœ€æ‚ªã«ãªã‚‹çž¬é–“ (r-1)/r^2 を最善ã«ã—よã†ã€ ã¨ã„ã†ä¸€ã¤ã®æŒ‡æ¨™ã§è€ƒãˆã¦ã¿ã‚‹ã¨ã€å¼ã‚’微分ãªã‚Šãªã‚“ãªã‚Šã—ã¦ã¿ã‚‹ã¨ r = 2 ã§æœ€å¤§(25%)ã¨ãªã‚‹ã“ã¨ãŒã‚ã‹ã‚Šã¾ã™
L'eclat des jours(2009-11-10)
_ ã§ã£ã‹ãªãƒãƒƒãƒ•ã‚¡ã‚’é¿ã‘ã‚‹? Aleviating Memory Fragmentation in Mono コンパクティングã—ãªã‘ã‚Œã°ã€ã„ã‚„ã§ã‚‚フラグメントãŒã©ã‹ã©ã‹ã§ãる。 ã™ã‚‹ã¨ã§ã£ã‹ãªãƒãƒƒãƒ•ã‚¡ã‚’å–ã‚ã†ã¨ã™ã‚‹ã¨æ–°ã—ã„ページã®å‰²ã‚Šå½“ã¦ãŒå¿…è¦ã¨ãªã‚Šãƒ—ãƒã‚»ã‚¹ãŒè‚¥å¤§ã™ã‚‹ã€‚ ã ã‹ã‚‰ã§ã£ã‹ãªãƒãƒƒãƒ•ã‚¡ã‚’è¦æ±‚ã™ã‚“ãªã€‚細切れ継ãŽåˆã‚ã›ãƒ¡ãƒ¢ãƒªãƒ¼ã‚¹ãƒˆãƒªãƒ¼ãƒ を使ãˆã€‚ ã¨èªã‚“ã 。 細切れ継ãŽåˆã‚ã›æ–¹å¼ã ã¨å®Ÿéš›ã®ãƒãƒƒãƒ•ã‚¡ã¸ã®ãƒã‚¤ãƒ³ã‚¿åˆ†ã ã‘余分ãªãƒ¡ãƒ¢ãƒªã‚’食ã†ã‚ã‘ã ã—ã€æ¬¡ã®ç´°åˆ‡ã‚Œã¸ã®ç§»å‹•ã«ã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ãŒã‹ã‹ã‚‹ã‚ã‘ã ãŒã€ãれを補ã£ã¦ã‚ã¾ã‚Šã‚ã‚‹æ©æµãŒå¾—られれã°OK。 （ã“ã“ã§ã€ã€Œã•ã£ãã試ã—ã¦ã¿ã‚‹ã€ã¨ã„ã‹ãªã„ã¨ã“ã‚ãŒã ã‚ãªã¨ã“ã‚ã ）
■- kurimura’s diary
stack_ni_yasasii_free_tree treeを回転ã•ã›ã¦å›žè»¢ã—ãã‚Œãªããªã£ãŸã‚‰å‰Šé™¤ã ã¨å‰²ã¨ç°¡å˜ã«ã‹ã‘ã‚‹æ°—ãŒã™ã‚‹ã€‚ void stack_ni_yasasii_free_tree(tree* t) { while(t){ tree*tmp; while(t->r){ tmp = t->r; t->r = tmp->l; tmp->l = t; t = tmp; } tmp = t; t = t->l; wrap_free(tmp); } }
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Our Rails customers often run into memory issues. The most frequent cause these days is what we in Support dub ‘bloated mongrels.’ To be fair, bloat has absolutely nothing to do with mongrel itself, which is a solid and fine piece of work. You can run into this problem just as easily with thin, passenger, etc. Changing to a different server will not save you, as the root cause is not the server, b
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ストーリー by hylom 2008å¹´12月16æ—¥ 14時02分 旧型ノートã®ã‚¢ãƒƒãƒ—グレードå‘ã‘ã«ãƒ‘ラレルATAモデルãŒæ¬²ã—ã„〠部門より SSDæ載ã®PCã¯ã“ã®2年程ã§ã ã„ã¶è¦‹ã‹ã‘るよã†ã«ãªã£ãŸãŒã€å¾“æ¥ã®ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ã¨æ¯”較ã™ã‚‹ã¨ä¾ç„¶é«˜ä¾¡ã§ã‚る。ã—ã‹ã—サムソンã®256GBã®SSDã®é‡ç”£é–‹å§‹ã‚„ã€ã‚¤ãƒ³ãƒ†ãƒ«ã®SSDå¸‚å ´å‚å…¥ã€ã¾ãŸMicronã®ç§’速1GBã®SSD発表ãªã©ã®ãƒ‹ãƒ¥ãƒ¼ã‚¹ã«è±¡å¾´ã•ã‚Œã‚‹ã‚ˆã†ã€2009å¹´ã«ã¯å®‰ä¾¡ã§é«˜ãƒ‘フォーマンスãªSSDãŒæ¶ˆè²»è€…ã¨ãƒ“ジãƒã‚¹ã®ä¸¡å¸‚å ´ã§æœ¬æ ¼çš„ã«æ™®åŠã™ã‚‹ã®ã§ã¯ãªã„ã‹ã¨äºˆæƒ³ã•ã‚Œã¦ã„ã‚‹ãã†ã （本家記事より）。 2009å¹´ã¯SSDèºé€²ã®å¹´ã«ãªã‚‹ã ã‚ã†ã‹ï¼Ÿ/.J諸æ°ã¯ã©ã†è¦‹ã‚‹ï¼Ÿ
センãƒãƒ¥ãƒªãƒ¼ãƒžã‚¤ã‚¯ãƒã€SPD書ãæ›ãˆã‚ットを発売 | スラド
PC Watchã®è¨˜äº‹ã«ã‚ˆã‚‹ã¨ã€ã‚»ãƒ³ãƒãƒ¥ãƒªãƒ¼ãƒžã‚¤ã‚¯ãƒæ ªå¼ä¼šç¤¾ã¯ã€ãƒ¡ãƒ¢ãƒªãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã®SPDæƒ…å ±ã‚’æ›¸ãæ›ãˆã‚‹ã‚ット「SPD PROGRAMMER -Model No.CSP-01-ã€ã‚’発売ã—ãŸã€‚ä¾¡æ ¼ã¯19,800円。 書ãæ›ãˆç”¨ã®ãƒ‡ãƒã‚¤ã‚¹ã¯USB接続ã§ã€DDR/DDR2/DDR3ã®DIMMã«å¯¾å¿œã—ã¦ãŠã‚Šã€ã‚ットã«ã¯ãã®ä»–ã«SPD編集ソフトãªã©ã®å«ã¾ã‚ŒãŸCD-ROMや動作確èªç”¨ãƒ€ãƒŸãƒ¼åŸºæ¿ãŒä»˜å±žã—ã¦ã„る。ã¾ãŸã€ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢æ§‹æˆã¨ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ä»•æ§˜ã¯ã™ã¹ã¦å…¬é–‹ã•ã‚Œã¦ãŠã‚Šã€ã‚ªãƒ¼ãƒ—ンソースを謳ã£ã¦ã„る。 AKIBA PC Hotline!ã‚„ASCII.jpã«ã‚ˆã‚‹ã¨ã€è²©å£²ã¯ã™ã§ã«T-ZONE DIY SHOPã§å§‹ã¾ã£ã¦ã„るよã†ã 。
CHIP Reverse Mortgage - Canada's Leading Plan | HomeEquity Bank
What is the CHIP Reverse Mortgage? The CHIP Reverse Mortgage allows Canadian homeowners age 55+ to access up to 55% of their home’s value and turn it into tax-free cash without having to move or sell and no monthly mortgage payments required! Our convenient, secure (and now contactless!) process means you can complete the entire application from the comfort of your own home from application throug
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To understand Chromium's memory usage, let's understand the multi-process model.  Unlike other browsers, Chromium is divided into multiple processes. When Chromium starts up, it will initially have two processes.  One process is the browser process which controls the main browser functionality, and the other is the initial renderer process, which runs the WebKit rendering engine and JavaScript (V8
What every programmer should know about memory, Part 1
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Linux 㯠fork ã§åプãƒã‚»ã‚¹ã‚’作æˆã—ãŸå ´åˆã€è¦ªã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªç©ºé–“ã®å†…容をåã¸ã‚³ãƒ”ーã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ã—ã‹ã—ã¾ã¨ã‚‚ã«å…¨ç©ºé–“をコピーã—ã¦ã„ãŸã®ã§ã¯ fork ã®ã‚³ã‚¹ãƒˆãŒé«˜ããªã£ã¦ã—ã¾ã„ã¾ã™ã—ã€åãŒè¦ªã¨åŒã˜ã‚ˆã†ãªãƒ—ãƒã‚»ã‚¹ã¨ã—ã¦å‹•ä½œã—続ã‘ã‚‹å ´åˆã¯ã€å†…容ã®é‡è¤‡ã—ãŸãƒšãƒ¼ã‚¸ãŒå¤šæ•°ã§ãã¦ã—ã¾ã„ã€åŠ¹çŽ‡ãŒã‚ˆãã‚ã‚Šã¾ã›ã‚“。 ãã“ã§ã€Linux ã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªã¯ã€ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’èˆã‚ã¦ã‚³ãƒ”ーã™ã‚‹ã®ã§ã¯ãªãã€ã¯ã˜ã‚ã¯è¦ªåã§ãƒ¡ãƒ¢ãƒªé ˜åŸŸã‚’共有ã—ã¦ãŠã„ã¦ã€æ›¸ãè¾¼ã¿ãŒã‚ã£ãŸæ™‚点ã§ã€ãã®æ›¸ãè¾¼ã¿ã®ã‚ã£ãŸãƒšãƒ¼ã‚¸ã ã‘を親åã§å€‹åˆ¥ã«æŒã¤ã¨ã„ã†ä»•çµ„ã¿ã§ã“ã®å•é¡Œã‚’回é¿ã—ã¾ã™ã€‚Copy-On-Write (CoW) ã¨å‘¼ã°ã‚Œã‚‹æˆ¦ç•¥ã§ã™ã€‚共有メモリページã¯ã€è¦ªåãã‚Œãžã‚Œã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’åŒä¸€ã®ç‰©ç†ãƒ¡ãƒ¢ãƒªã«ãƒžãƒƒãƒ”ングã™ã‚‹ã“ã¨ã§å®Ÿç¾ã•ã‚Œã¾ã™ã€‚より詳ã—ã㯠コピーオンライト - Wikipedia ãªã©ã‚’å‚ç…§ã—ã¦ãã ã•ã„。 ã“ã® CoW ã«
Rubygrind - 兼雑記
ã‚ã‚“ã¾æ·±ã考ãˆãš valgrind ã‚’ Ruby ã® head ã®ãƒ†ã‚¹ãƒˆã«é©ç”¨ã—ã¦ã¿ãŸã¨ã“ã‚ã€çµæ§‹ã‚‚ã«ã‚‡ã‚‚ã«ã‚‡æ¼ã‚Œã¦ã‚‹ã‚‚ã‚“ã ãªãã¨æ°—付ã„ãŸã®ã§ã€ã„ãã¤ã‹ä¿®æ£ã—ã¦ã¿ãŸã‚Šã—ãŸã®ã§ã™ãŒã€ãã®æ™‚案外困るã®ãŒã€ãƒªãƒ¼ã‚¯ã™ã‚‹æœ€å°ã®ã‚³ãƒ¼ãƒ‰ãŒç°¡å˜ã«ä½œã‚Œãªã„ã€ã£ã¦ã“ã¨ã§ã—ãŸã€‚ valgrind 㯠C 言語的ã«ã©ã“㧠malloc を呼んã ã‹ã¯æ•™ãˆã¦ãれるもã®ã®ã€ Ruby コードã§ã©ã“ã ã£ãŸã‹ã¯æ•™ãˆã¦ãã‚Œãªã„ã‹ã‚‰ã§ã™ã€‚ä¿®æ£ã¯ã§ããŸã‘ã©å…·ä½“çš„ã«ã©ã“ã§æ¼ã‚Œã¦ã‚‹ã‹ã¯ã‚ˆãã‚ã‹ã‚‰ã‚“ã€ã¨ã„ã†ã“ã¨ã•ãˆã‚ã‚Šã¾ã—ãŸã€‚ ã¨ã„ã†ã‚ã‘ã§ã€ Ruby çš„ã«ã©ã“ã§æ¼ã‚ŒãŸã‹ã‚’æ•™ãˆã¦ãれる valgrind 用㮠tool 〠Rubygrind を作ã£ã¦ã¿ã¾ã—ãŸã€‚ http://shinh.skr.jp/binary/rmemcheck.tgz ã“れを valgrind-3.3.1 ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã«å±•é–‹ã—ã¦ã€ > diff -u con
malloc The 67th kernel reading party - Google Video
The 67th kernel reading party - 1:39:31 - Sep 24, 2006 Yokohama Linux Users Group - www.ylug.jp/ ()Â Rate: glibc malloc Download video - iPod/PSPÂ |Â Embed video Download is starting. Save file to your computer. If the download does not start automatically, right-click this link and choose "Save As". How to get videos onto the iPod or PSP. <embed id="VideoPlayback" src="http://video.google.com/goog
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The MySQL “swap insanity†problem and the effects of the NUMA architecture
Xen Memory Management
Ballooning is more than enough to do memory overcommit on Xen Oracle says – virtualization.info
Google Code Archive - Long-term storage for Google Code Project Hosting.
ã€ãƒ¬ãƒãƒ¼ãƒˆã€‘COOL Chips XI - メニーコアã§ã¯ãƒ¡ãƒ¢ãƒªãƒãƒ³ãƒ‰å¹…ãŒæ€§èƒ½ã‚’制約ã™ã‚‹ | エンタープライズ | マイコミジャーナル
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