Secure Cache-Line Reallocation

An overview of PASS-P

Guide: Prof. Virendra Singh

Performance and Security Sensitive Dynamic Reallocation (PASS-P) is a modification on top of Utitlity-Based Partioning (UCP) which preferentially re-allocates clean cache lines in order to reduce memory latency and also invalidates them to prevent any side-channel attack to be mounted on the system. We performed an extensive analysis of PASS-P and concluded that because the LLC has a very high dead block percentage (dead blocks are blocks which never get a hit after being brought into the cache), they would serve as a good eviction candidate, since they are anyways going to be evicted after some time without getting a hit. With our proposal, were able to reduce the deadblock percentage by over 10% averaged across all benchmarks.

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