So we hear about HyperThreading and how it is sooo cool, well, it is and it isn't. If you are really trying to squeeze performance out of your application HyperThreading might not be what you're looking for. There are so many other things that happens at the CPU level that have so weird names (like Thread Thrashing, 'say whaaaat?'). If you are really serious on squeezing every worthy CPU cycle of your app (or if you're interesting on what really really goes under the hood) take a listen! (ah! and treat me a beer, if you like what you hear!)
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Thread Priority in Linux
LMax Disruptor
Identifying Cache Misses in Java (PDF)
JClarity Tool (for measuring many hardware performance task, of Martijn Verburg fame!)
Tree Parsing and Evaluation example
Oracle Solaris Studio (part of Charlie Hunt bags of tricks)
More tips and tricks from Java Application Profiling
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