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The initial location of data in DRAMs is determined and controlled by the'address-mapping' and even modern memory controllers use a fixed andrun-time-agnostic address mapping. On the other hand, the memory access patternseen at the memory interface level will dynamically change at run-time. Thisdynamic nature of memory access pattern and the fixed behavior of addressmapping process in DRAM controllers, implied by using a fixed address mappingscheme, means that DRAM performance cannot be exploited efficiently. DReAM is anovel hardware technique that can detect a workload-specific address mapping atrun-time based on the application access pattern which improves the performanceof DRAMs. The experimental results show that DReAM outperforms the bestevaluated address mapping on average by 9%, for mapping-sensitive workloads, by2% for mapping-insensitive workloads, and up to 28% across all the workloads.DReAM can be seen as an insurance policy capable of detecting which scenariosare not well served by the predefined address mapping.

DReAM: Dynamic Re-arrangement of Address Mapping to Improve the Performance of DRAMs