CoSeP: Compression and Content-based Selection Procedure to Improve Lifetime of Encrypted Non-Volatile Main Memories

Abstract

In this paper, we propose a technique called CoSeP that combines the effect of compression and the content of the compressed blocks to reduce bit-flips in the encrypted PCM-based main memories. The blocks are compressed using the technique (out of FPC, BDI, and COMF) that offers minimum block size when the sizes of the two smallest compressed blocks are non-similar. However, for compressed blocks of similar sizes, the block is compressed using the technique that encounters minimum bit-flips, which reduces bit-flips further. Experimental results show that our technique gives a substantial reduction in bit-flips and improvements in lifetime compared to baseline and state-of-the-art techniques.