Evaluation and Tradeoffs for Out-of-Order Execution on Reconfigurable Heterogeneous MPSoC
Qi Guo, Xi Li, Chao Wang, Xuehai Zhou · IEEE Transactions on Very Large Scale Integration (VLSI) Systems · 2015
Out-of-order (OoO) execution schemes show incredible promise for task-level parallelism in multiprocessor system-on-chip (MPSoC) designs. However, the main challenge of the OoO execution lies in the analysis of the intertask dependences. In this paper, we address this challenge by applying the instruction-level scoreboarding algorithm at the task level. Furthermore, we introduce both software-based static and dynamic implementations on top of a heterogeneous MPSoC prototyped on a field-programmable gate array fabric. Our experimental results show that our approach can achieve up to 94.75% and 97.68% of the theoretical speedup. Finally, we present an in-depth analysis of the tradeoff between our dynamic and static approaches.