Erasing Core Boundaries for Robust and Configurable Performance

Single-thread performance, reliability and power efficiency are critical design challenges of future multicore systems. Although point solutions have been proposed to address these issues, a more fundamental change to the fabric of multicore systems is necessary to seamlessly combat these challenges. Towards this end, this paper proposes CoreGenesis, a dynamically adaptive multiprocessor fabric that blurs out individual core boundaries, and encourages resource sharing across cores for performance, fault tolerance and customized processing. Further, as a manifestation of this vision, the paper provides details of a unified performance-reliability solution that can assemble variable-width processors from a network of (potentially broken) pipeline stage-level resources. This design relies on interconnection flexibility, microarchitectural innovations, and compiler directed instruction steering, to merge pipeline resources for high single-thread performance. The same flexibility enables i...

• Type: Journal
• Year: 2010
• Where: MICRO
• Authors: Shantanu Gupta, Shuguang Feng, Amin Ansari, Scott A. Mahlke
• Keywords: Hardware, MICRO 2010, Multicore Systems, Pipeline Stage-level Resources, Single-thread Performance