Multicore processors bring significant performance and power usage benefits to embedded systems, but they also add the complexity of multiprocessing to the legacy migration workload. Nonetheless, development teams can successfully manage their transition to multicore by following some straightforward techniques.
1.Port to a portable standard
2.Divide and conquer
3.Leverage the tools
4.Making the transition
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refer:
http://mil-embedded.com/articles/migrating-applications-multicore-not-scary-it-sounds/