Linux tips
Thursday, April 17, 2014
Understand G1 gc log
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Basic flags: -XX:+PrintGCTimeStamps -XX:+PrintGCDetails G1 prints out various logs, depending on the flags you use. The basic ones are: ...
Wednesday, January 30, 2013
HotSpot -XX:+PrintComilation output, what does it mean?
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HotSpot -XX:+PrintAssembly How to: Reference: https://wikis.oracle.com/display//HotSpotInternals/PrintAssembly http://stackoverflow.com...
Wednesday, September 26, 2012
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Use Dtrace to locate the source of unstable performance (Solaris 11) I was running a micro benchmark. The run takes about 10 minutes, w...
Monday, August 20, 2012
How to get hardware layout on Linux
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Sometimes, you need to know the hardware layout for interrupt handling assignment, memory access, etc. You can use dmidecode along cat /p...
Friday, December 23, 2011
Network Interrupts handling and monitor
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Problem: We had a test case that shows network packets being dropped. The packets are dropped on TCP layer, not IP layer. And the behavio...
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