Evaluation of Misspeculation Impact on Chip-Multiprocessors Power Overhead
Baisakhi Das, Mamata Dalui, Anupama Mondal, Salma Mandi, Nilanjana Das, Biplab Kumar Sikdar · 2018
The main reason for low efficiency of data cache in chip-multiprocessors (CMPs) is the presence of dead blocks that are not accessed for a long time before eviction. The design inaccuracies degrade the performance of a system and cause huge power drainage. This demands effective prediction scheme for the early detection of dead block. This work, therefore, targets to study the impact of faults/inaccuracies in prediction (misspeculation) causing additional loss in processor power. Further, the power loss for misspeculation in data migration is evaluated. The analysis of experimental results reveals that the misspeculation needs to be avoided in CMPs to ensure effectiveness of such a system.