A Performance-Energy Model to Evaluate Single Thread Execution Acceleration

Seung Hun Kim, Dohoon Kim, Changmin Lee, Won Seob Jeong, Won Woo Ro, Jean Luc Gaudiot

Research output: Contribution to journalArticle

4 Citations (Scopus)


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.

Original languageEnglish
Article number6949088
Pages (from-to)99-102
Number of pages4
JournalIEEE Computer Architecture Letters
Issue number2
Publication statusPublished - 2015 Jul 1

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture

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