Kris Mok rednaxelafx
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| Last login: Tue Aug 16 01:27:40 on ttys001 | |
| Kriss-MacBook-Air:~ rednaxelafx$ cd build/maxine/ | |
| Kriss-MacBook-Air:maxine rednaxelafx$ max | |
| Maxine Launcher | |
| available commands: | |
| build compile the Maxine Java and C sources, linking the latter | |
| c1x process a list of methods with the C1X compiler | |
| check run Checkstyle on the Maxine Java sources | |
| clean Remove all class files, images, and executables |
rednaxelafx
/ .hotspot_compiler
Created
August 29, 2011 09:15
OptimizeStringConcat on HotSpot 22.0-b02
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| exclude * main |
rednaxelafx
/ modifications.diff
Created
September 4, 2011 18:07
Modifications to the default Octopress blog for my blog on Github
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| Binary files ./source/images/avatar.jpg and /home/rednaxelafx/coderepo/gitrepo/octopress/source/images/avatar.jpg differ | |
| diff -rupN ./source/_includes/custom/asides/about.html /home/rednaxelafx/coderepo/gitrepo/octopress/source/_includes/custom/asides/about.html | |
| --- ./source/_includes/custom/asides/about.html 2011-09-05 01:49:29.787989004 +0800 | |
| +++ /home/rednaxelafx/coderepo/gitrepo/octopress/source/_includes/custom/asides/about.html 2011-09-04 21:50:03.177989008 +0800 | |
| @@ -1,4 +1,19 @@ | |
| <section> | |
| <h1>About Me</h1> | |
| - <p>A little something about me.</p> | |
| + <p> | |
| + <img src="/images/avatar.jpg" width="120" style="float:left;margin-right:10px" /> |
rednaxelafx
/ command_prompt
Created
September 12, 2011 17:38
My Acer Aspire 4741G's status after 10 months of use. Battery's capacity dropped quite a bit. Learned to use 'acpi' from http://www.linuxondesktop.in/2011/03/ubuntu-tips-manage-cpu-tempreature.html
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| rednaxelafx@fx-laptop:~$ acpi -v | |
| The program 'acpi' is currently not installed. You can install it by typing: | |
| sudo apt-get install acpi | |
| rednaxelafx@fx-laptop:~$ sudo apt-get install acpi | |
| [sudo] password for rednaxelafx: | |
| Reading package lists... Done | |
| Building dependency tree | |
| Reading state information... Done | |
| The following NEW packages will be installed: | |
| acpi |
rednaxelafx
/ hs_err_pid2820.log
Created
September 14, 2011 13:18
An example showing that the default stack size of a Java process is 320KB on 32-bit Windows, Oracle JDK 6 update 26, as specified in the java.exe launcher's PE properties.
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| # | |
| # A fatal error has been detected by the Java Runtime Environment: | |
| # | |
| # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d98aa84, pid=2820, tid=2600 | |
| # | |
| # JRE version: 6.0_26-b03 | |
| # Java VM: Java HotSpot(TM) Client VM (20.1-b02 mixed mode, sharing windows-x86 ) | |
| # Problematic frame: | |
| # V [jvm.dll+0xeaa84] | |
| # |
rednaxelafx
/ TestIntegerCache.java
Created
September 20, 2011 06:49
In Oracle/Sun JDK, setting Java property "java.lang.Integer.IntegerCache.high" affects the size of the Integer cache, whether or not it came from -XX:AutoBoxCacheMax
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| public class TestIntegerCache { | |
| public static void main(String[] args) { | |
| puts("1: " + ((Object) 2000 == (Object) 2000)); | |
| puts("2: " + ((Object) 2001 == (Object) 2001)); | |
| } | |
| public static void puts(String s) { | |
| System.out.println(s); | |
| } | |
| } |
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| =============================================================================== | |
| Pre-Installation Summary | |
| ------------------------ | |
| Please Review the Following Before Continuing: | |
| Product Name: | |
| IBM 64-bit Linux SDK for Java v7 | |
| Install Folder: |
rednaxelafx
/ Test.java
Created
October 13, 2011 11:51
Threads when running a 64-bit HotSpot VM with default args. ParallelScavenge's GCTaskThread's are alive from very early stage.
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| public class Test { | |
| public static void main(String[] args) throws Exception { | |
| System.in.read(); | |
| } | |
| } |
rednaxelafx
/ gist:1284125
Created
October 13, 2011 12:30
Large array created during "revptrs" processing, in CLHSDB (HS20)
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| hsdb> revptrs | |
| Usage: revptrs address | |
| hsdb> revptrs 0x620001670 | |
| Computing reverse pointers... | |
| ==WARNNING== allocate too large array--thread_id[0x000000005ef8a800]--thread_name[main]--array_size[71303184 bytes]--array_length[17825792 elememts] | |
| prio=10 tid=0x000000005ef8a800 nid=0x1bda runnable at sun.jvm.hotspot.utilities.BitMap.<init>(BitMap.java:34) | |
| at sun.jvm.hotspot.utilities.MarkBits.<init>(MarkBits.java:45) | |
| at sun.jvm.hotspot.utilities.ReversePtrsAnalysis.run(ReversePtrsAnalysis.java:88) | |
| at sun.jvm.hotspot.CommandProcessor$9.doit(CommandProcessor.java:518) | |
| at sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:1437) |
rednaxelafx
/ Test.java
Created
October 13, 2011 14:19
Notes on how HotSpot keeps track of initiating class loaders (diff against HS20-b11)
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| import java.io.*; | |
| import java.net.*; | |
| public class Test { | |
| public static void main(String[] args) throws Exception { | |
| // use system class loader as parent | |
| ClassLoader loader = new URLClassLoader(new URL[] { }); | |
| Class.forName("java.lang.String", true, loader); | |
| loader.loadClass("Foo"); | |
| Class.forName("Bar", true, loader); |