A Performance-Energy Model to Evaluate Single Thread Execution Acceleration

作者：Kim Seung Hun^*; Kim Dohoon; Lee Changmin; Jeong Won Seob; Ro Won Woo; Gaudiot Jean Luc

来源：IEEE Computer Architecture Letters, 2015, 14(2): 99-102.

DOI：10.1109/LCA.2014.2368144

• Performance modeling
• multiprocessor systems
• energy-aware systems

It is well known that the cost of executing the sequential portion of a program will limit and sometimes even eclipse the gains brought by processing in parallel the rest of the program. This means that serious consideration should be brought to bear on accelerating the execution of this unavoidable sequential part. Such acceleration can be done by boosting the operating frequency in a symmetric multicore processor. In this paper, we derive a performance and power model to describe the implications of this approach. From our model, we show that the ratio of performance over energy during the sequential part improves with an increase in the number of cores. In addition, we demonstrate how to determine with the proposed model the optimal frequency boosting ratio which maximizes energy efficiency.

• 出版日期2015-12