Thermal-Cycling-aware Dynamic Reliability Management in Many-Core System-on-Chip

摘要

Dynamic Reliability Management (DRM) is a common approach to mitigate aging and wear-out effects in multi- /many-core systems. State-of-the-art DRM approaches apply finegrained control on resource management to increase/balance the chip reliability while considering other system constraints, e.g., performance, and power budget. Such approaches, acting on various knobs such as workload mapping and scheduling, Dynamic Voltage/Frequency Scaling (DVFS) and Per-Core Power Gating (PCPG), demonstrated to work properly with the various aging mechanisms, such as electromigration, and Negative-Bias Temperature Instability (NBTI). However, we claim that they do not suffice for thermal cycling. Thus, we here propose a novel thermal-cycling-aware DRM approach for shared-memory many-core systems running multi-threaded applications. The approach applies a fine-grained control capable at reducing both temperature levels and variations. The experimental evaluations demonstrated that the proposed approach is able to achieve 39% longer lifetime than past approaches.