Code Lifetime-Based Memory Reduction for Virtual Execution Environments


The need for adaptability in a rapidly expanding embedded systems market makes it important to design virtual execution environments (VEEs) specifically targeting embedded platforms. We believe the first step in this direction should be to replace the performance focus of traditional VEE design with a combined memory and performance focus, given the memory constraints on embedded systems. In this work, we present techniques that reduce the large code cache sizes of VEEs by continually eliminating dead cached code as the guest application executes. We use both a time-based heuristic and an execution count-based heuristic to predict code lifetime. When we determine that the lifetime of code has ended, we remove it from the code cache. We found that at least 20% code cache reduction can be achieved on average, without a significant performance degradation.

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@inproceedings{Guha2008CodeLM, title={Code Lifetime-Based Memory Reduction for Virtual Execution Environments}, author={Apala Guha and Kim M. Hazelwood and Mary Lou Soffa}, year={2008} }