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doboccho id:doboccho

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doboccho 2013/10/07
jvm

Oracle

java
ãƒªãƒ³ã‚¯
Javaã‚¬ãƒ™ãƒ¼ã‚¸ã‚³ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ã®ã‚¨ãƒƒã‚»ãƒ³ã‚¹
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doboccho 2013/08/06
gc

jvm

java

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
Javaã§OutOfMemoryErrorã‚’å‡ºã™æ–¹æ³• - terazzoã®æ—¥è¨˜
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doboccho 2013/06/25
Java

jvm
ãƒªãƒ³ã‚¯
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doboccho 2013/05/11
Java

jvm

option
ãƒªãƒ³ã‚¯
ç¬¬1å›žã€€JVMã¯ã©ã®ã‚ˆã†ã«ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’åˆ©ç”¨ã™ã‚‹ã®ã‹ | gihyo.jp
ã‚ã®Webã‚µãƒ¼ãƒ“ã‚¹ã‚‚JVMã‚’åˆ©ç”¨ã—ã¦ã„ã‚‹ ã€ŒJavaã¯å¤§è¦æ¨¡ãªã‚¨ãƒ³ã‚¿ãƒ¼ãƒ—ãƒ©ã‚¤ã‚ºã‚·ã‚¹ãƒ†ãƒ ã«ã—ã‹ä½¿ã‚ã‚Œãªã„ã€ ãã‚ŒãŒå¸¸è˜ã ã¨æ€ã£ã¦ã„ã¾ã›ã‚“ã‹ï¼Ÿ ãŸã—ã‹ã«ã€ã“ã‚Œã¾ã§Java Virtual Machineï¼ˆJVMï¼‰ã¯ã€ä»–ã®è¨€èªžã‚’å®Ÿè¡Œã™ã‚‹ã¨é…ãã€Javaã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’å®Ÿè¡Œã™ã‚‹ç’°å¢ƒã«ã™ãŽãªã„ã‚‚ã®ã§ã—ãŸã€‚ã¨ã“ã‚ãŒã€Java 7ã‹ã‚‰å®Ÿè£…ã•ã‚ŒãŸInvokeDynamicã«ã‚ˆã‚Šã€JVMä¸Šã§ã€Rubyã‚„PHPãªã©ã•ã¾ã–ã¾ãªã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿è¨€èªžã§è¨˜è¿°ã•ã‚ŒãŸãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ã‚ˆã‚Šé«˜é€Ÿã«å®Ÿè¡Œã§ãã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ ã“ã‚Œã«ã‚ˆã‚Šã€ä»Šã¾ã§ã‚¨ãƒ³ã‚¿ãƒ¼ãƒ—ãƒ©ã‚¤ã‚ºã§Javaè¨€èªžã§è¨˜è¿°ã•ã‚ŒãŸãƒ—ãƒã‚°ãƒ©ãƒ ã‚’å®Ÿè¡Œã™ã‚‹ã ã‘ã®ç’°å¢ƒã§ã‚ã£ãŸJVMãŒã€æ±Žç”¨çš„ãªå®Ÿè¡Œç’°å¢ƒã«ãªã£ãŸã¨è¨€ãˆã¾ã™ã€‚ã¾ãŸã€ã“ã‚Œã¾ã§Javaã®å®Ÿè¡Œç’°å¢ƒã¨ã—ã¦ä½¿ç”¨ã•ã‚Œã¦ã„ãŸãƒŽã‚¦ãƒã‚¦ãŒã€ä»–ã®è¨€èªžã§è¨˜è¿°ã•ã‚ŒãŸãƒ—ãƒã‚°ãƒ©ãƒ ã‚’å®Ÿè¡Œã™ã‚‹éš›ã«ã‚‚åˆ©ç”¨ã§ãã¾ã™ã€‚ æœ€è¿‘ã§ã¯ã€TwitterãŒJVMã‚’ã‚¢ãƒ—ãƒªã‚±ãƒ¼
doboccho 2013/01/16
jvm

Java
ãƒªãƒ³ã‚¯
Java SE 7 InvokeDynamic in JRuby
9. JITæœ€é©åŒ–ã®ä¾‹: ã‚¤ãƒ³ãƒ©ã‚¤ãƒ³åŒ– double addAllSqrts(int max) { double accum = 0; for (int i = 0; i < max; i++) { accum = addSqrt(accum, i); } return accum; } double addSqrt(double a, int b) { return a + Math.sqrt(b); } public static void main(String[] args) { for (int i = 0; i < 100000; ++i) { (new Target()).addAllSqrts(10); } } 10. JITæœ€é©åŒ–ã®ä¾‹: ã‚¤ãƒ³ãƒ©ã‚¤ãƒ³åŒ– % java -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -
doboccho 2012/04/05
JRuby

jvm
ãƒªãƒ³ã‚¯
Java HotSpot VM Options - #9 Backyard
ä»¥ä¸‹ Java HotSpot VM Options ã®å‹æ‰‹ç¿»è¨³ã¨ã€è¿½åŠ ã§åŽŸæ–‡ã«ã¯è¼‰ã£ã¦ã„ãªã„ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã«ã¤ã„ã¦ã€‚Oracle JDK 6 ã‚’å¯¾è±¡ã¨ã—ãŸå†…å®¹ã¨ãªã£ã¦ã„ã¾ã™ã€‚ ã“ã®ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã¯ Java HotSpot ä»®æƒ³ãƒžã‚·ãƒ³ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ç‰¹æ€§ã«å½±éŸ¿ã‚’ä¸Žãˆã‚‹ä¸€èˆ¬çš„ãªã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã¨ç’°å¢ƒå¤‰æ•°ã«é–¢ã™ã‚‹æƒ…å ±ã‚’æä¾›ã—ã¾ã™ã€‚ç‰¹ã«æ–ã‚Šã®ãªã„é™ã‚Šã“ã®ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã®ã™ã¹ã¦ã®æƒ…å ±ã¯ Java HotSpot Client VM ã¨ Java HotSpot Server VM ã®ä¸¡æ–¹ã«é©ç”¨ã•ã‚Œã¾ã™ã€‚1.3.0 ã‚ˆã‚Šå¤ã„ JDK ã« Java HotSpot VM ã‚’ç§»æ¤ã—ãŸã„ãƒ¦ãƒ¼ã‚¶ã¯ Java HotSpot Equivalents of Exact VM Flags ã‚’å‚ç…§ã—ã¦ä¸‹ã•ã„ã€‚ Java HotSpot VM ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã®ã‚«ãƒ†ã‚´ãƒª Java HotSpot VM ãŒèªè˜ã™ã‚‹æ¨™æº–ã‚ªãƒ—
doboccho 2012/02/29
Java

jvm
ãƒªãƒ³ã‚¯
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