On-Demand Redundancy Grouping: Selectable Soft-Error Tolerance for a Multicore Cluster
| Autor: | Rogenmoser, Michael, Wistoff, Nils, Vogel, Pirmin, Gürkaynak, Frank Kagan, Benini, Luca |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Reliability
Adaptive Fault Tolerance RISC-V Space Vehicle Computers Signal Processing (eess.SP) FOS: Computer and information sciences Computer Science - Distributed Parallel and Cluster Computing FOS: Electrical engineering electronic engineering information engineering Distributed Parallel and Cluster Computing (cs.DC) Electrical Engineering and Systems Science - Signal Processing |
| Zdroj: | 2022 IEEE Computer Society Annual Symposium on VLSI (ISVLSI) |
| Popis: | With the shrinking of technology nodes and the use of parallel processor clusters in hostile and critical environments, such as space, run-time faults caused by radiation are a serious cross-cutting concern, also impacting architectural design. This paper introduces an architectural approach to run-time configurable soft-error tolerance at the core level, augmenting a six-core open-source RISC-V cluster with a novel On-Demand Redundancy Grouping (ODRG) scheme. ODRG allows the cluster to operate either as two fault-tolerant cores, or six individual cores for high-performance, with limited overhead to switch between these modes during run-time. The ODRG unit adds less than 11% of a core's area for a three-core group, or a total of 1% of the cluster area, and shows negligible timing increase, which compares favorably to a commercial state-of-the-art implementation, and is 2.5$\times$ faster in fault recovery re-synchronization. Furthermore, unlike other implementations, when redundancy is not necessary, the ODRG approach allows the redundant cores to be used for independent computation, allowing up to 2.96$\times$ increase in performance for selected applications. |
| Databáze: | OpenAIRE |
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