Migrating Java Threads with Fuzzy Control on Asymmetric Multicore Systems for Better Energy Delay Product

Asymmetric multicore systems had been studied as a new hardware platform toward performance-power efficiency for the execution of application programs. Each core in the system has distinct performance and power characteristics. When exploiting asymmetric multicore systems, a major issue is to distribute threads to various cores. In this work, we build a pseudo asymmetric system by the dynamic voltage frequency scaling (DVFS) mechanism on Intel core-i7 920 for physical power measurement and implement a tool agent for regular JVM to form an asymmetric-aware JVM that supervises the execution of Java threads and migrates threads with a fuzzycontrol scheduler. For result inspection, we consider energy delay product (EDP) as a metric to reveal the compromise between performance and energy use. Our fuzzy-control scheduler results in EDP benefit for some benchmarks and lower overall energy consumption. 1 Keywords-Asymmetric multicore; JVM; power efficiency; schedule;