Universidad de Costa Rica

Write-aware replacement policies for pcm-based systems

Ing. Roberto Rodríguez Rodríguez, PhD.
Roberto Rodríguez-Rodríguez and Fernando Castro and Daniel Chaver and Rekai González-Alberquilla and Luis Piñuel and Francisco Tirado
The Computer Journal
Oxford University Press


The gap between processor and memory speeds is one of the greatest challenges that current designers face in order to develop more powerful computer systems. In addition, the scalability of the Dynamic Random Access Memory (DRAM) technology is very limited nowadays, leading one to consider new memory technologies as candidates for the replacement of conventional DRAM. Phase-Change Memory (PCM) is currently postulated as the prime contender due to its higher scalability and lower leakage. However, compared with DRAM, PCM also exhibits some drawbacks, like lower endurance or higher dynamic energy consumption and write latency, that need to be mitigated before it can be used as the main memory technology for the next generation of computers. This work addresses the PCM endurance constraint. For this purpose, we present an analysis of conventional …

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