PSI probe for tomcat can’t generate chart
Add this “CATALINA_OPTS=-Djava.awt.headless=true” to catalina.sh
newlib compile error in Fedora 18 64 bits
when you meet the following error, add “.code32” can fix it. ../../../../../../newlib-1.19.0/newlib/libc/machine/i386/memcmp.S: Assembler messages: ../../../../../../newlib-1.19.0/newlib/libc/machine/i386/memcmp.S:18: Error: invalid instruction suffix for `push’ ../../../../../../newlib-1.19.0/newlib/libc/machine/i386/memcmp.S:21: Error: invalid instruction suffix for `push’ ../../../../../../newlib-1.19.0/newlib/libc/machine/i386/memcmp.S:22: Error: invalid instruction suffix for `push’ ../../../../../../newlib-1.19.0/newlib/libc/machine/i386/memcmp.S:23: Error: invalid instruction suffix for `push’ ../../../../../../newlib-1.19.0/newlib/libc/machine/i386/memcmp.S:72: Error: invalid instruction suffix for `pop’ ../../../../../../newlib-1.19.0/newlib/libc/machine/i386/memcmp.S:73: Error: invalid instruction suffix for…
Read more
10 places where anyone can learn to code
Teens, tweens and kids are often referred to as “digital natives.” Having grown up with the Internet, smartphones and tablets, they’re often extraordinarily adept at interacting with digital technology. But Mitch Resnick, who spoke at TEDxBeaconStreet in November, is skeptical of this descriptor. Sure, young people can text and chat and play games, he says, “but that…
Read more
In search of the anti-ddos device
http://dev.esl.eu/blog/2010/09/10/in-search-of-the-anti-ddos-device/ Preamble The following text describes the evaluation of the most reasonable solution in order to achieve the goal of protecting our infrastructure from DDoS attacks. All collected values and impressions do not lay claim to being correct nor complete. This article only reflects our experiences and data and therefore should be used to help…
Read more
Fix the PermGen error in tomcat
Fix the PermGen error in tomcat, execute this before startup.sh: export JAVA_OPTS=”-XX:PermSize=2048m”
Ported ubuntu theme to fedora
Ported ubuntu theme to fedora, tested on FC17, unzip themes.tar.bz2 in /usr/share/themes
A x86 java disassembler from Maxine Project
I have been asking for a java x86 disassembler library for a long time, i finally found “Maxine” project from oracle, it is a VM project with built-in a x86 assembler written Java. I git-ed the source and compile them in eclipse, it works!, here is the source and screenshot. source : maxine_disassembler
How to change Fedora’s font rendering to get an Ubuntu-like result
Font rendering is a matter of taste. However, I personally think Ubuntu’s default font rendering is the most eye-pleasing one of the whole Linux eco-system. And if a website’s CSS font stack is looking good on Ubuntu, you can be relatively sure that it also works for Mac or MS Windows as long as the used fonts are available on these…
Read more
get out of the keying trouble when you start chrome in fedora 17
just add “–password-store=basic” in the option you start chrome.
Filter out special character in json
$str=”`!@#$%^&*()_+[]\{}|;’:\”,./?”; $str=str_replace(“\\”,”\\\\”, $str); $str=str_replace(“\””,”\\\””, $str);
Dev target 2013/02
1) port peter-bochs to qemu 2) finish new lib stub open() 3) make the libc layer fully working 4) Pass all PKU exams
qemu-kvm is much slower than qemu for single-step
I can do 1500 single-steps per second in qemu. But i can only do 148 in qemu-kvm. I test it by: 1) create a debug server in qemu 2) send huge amount of “s” command from a java program, every “s” command will perform one single step action in qemu.
fail to single step qemu
Hi all I created a simple debug server on qemu, it receives command from tcp, but when i try to single step qemu, it fails, it will keep running rather than stop in the next instruction. I have traced the code a little bit, for gdb, when gdb do single step, the process will throw…
Read more