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4 Implementation

In this section, we describe our experiences in implementing and deploying PAVM in a real system. Due to complexities in real systems, a direct realization of the PAVM design described earlier does not perform up to our original expectations. Further investigation into how memory is used and managed in the Linux operating system reveals insights that we use to refine our original system and succeed in conserving a substantial amount of memory energy under the complex real-world environments.