Bob Pasker

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Every major chip manufacturer has delivered or announced a roadmap for multicore chips that have multiple CPUs on the same piece of silicon. Systems developers are now designing these chips into their entire product line. For Java platform developers, Symmetric Multiprocessing Systems (SMP) should be hidden well below the hardware abstraction layer, but not all applications will get equal benefits from SMP without understanding what's going on under the hood. This article discusses strategies for achieving the best bang for the buck out of SMP systems. We'll look at design patterns for parallel programming and locking, debugging and profiling, large memory footprints and the effects on garbage collection, as well as tuning and capacity planning. Java was originally designed as a language for set-top box applications and later became a vehicle for the HotJava browser... (more)