MemGuard: Memory bandwidth reservation system for efficient performance isolation in multi-core platforms

Authors:
Marco Caccamo;Rodolfo Pellizzoni;Lui Sha;Gang Yao;Heechul Yun
Affiliations:
University of Illinois at Urbana-Champaign, USA;University of Waterloo, Canada;University of Illinois at Urbana-Champaign, USA;University of Illinois at Urbana-Champaign, USA;University of Illinois at Urbana-Champaign, USA
Venue:
RTAS '13 Proceedings of the 2013 IEEE 19th Real-Time and Embedded Technology and Applications Symposium (RTAS)
Year:
2013

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A reconfigurable real-time SDRAM controller for mixed time-criticality systems

Proceedings of the Ninth IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis

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Abstract

Memory bandwidth in modern multi-core platforms is highly variable for many reasons and is a big challenge in designing real-time systems as applications are increasingly becoming more memory intensive. In this work, we proposed, designed, and implemented an efficient memory bandwidth reservation system, that we call MemGuard. MemGuard distinguishes memory bandwidth as two parts: guaranteed and best effort. It provides bandwidth reservation for the guaranteed bandwidth for temporal isolation, with efficient reclaiming to maximally utilize the reserved bandwidth. It further improves performance by exploiting the best effort bandwidth after satisfying each core's reserved bandwidth. MemGuard is evaluated with SPEC2006 benchmarks on a real hardware platform, and the results demonstrate that it is able to provide memory performance isolation with minimal impact on overall throughput.