Performance Evaluations of a Multithreaded

We propose handling of external real-time events through multithreading and describe the microarchitecture of our multithreaded Java microcontroller, called Komodo microcontroller. Real-time Java threads are used as interrupt service threads (ISTs) instead of interrupt service routines (ISRs). Our proposed Komodo microcon-troller supports multiple ISTs with zero-cycle context switching overhead. We evaluate the basic performance and optimize the internal structures of our mi-crocontroller using real-time applications as benchmarks on a software simulator. We determine the correlation between the fetch bandwidth and the instruction window size. Our results show a performance gain of about 1.4 by latency reducing over the single threaded model.