Quantitative analysis on caching effect of I-structure data in frame-based multithreaded processing

Since long latency due to remote memory access could be tolerated by rapidly switching to another thread in multithreaded processing, caching I-structure data is expected to have less beneficial effect on the performance than caching ordinary data. In this paper we show that caching I-structure data could improve the overall performance in spite of latency tolerating property of multithreading. Our quantitative analysis reveals that the most important caching effect off-structure data in frame-based multithreading is the enhancement of frame parallelism. It reduces the idle time due to latency by lowering latency sensitivity and at the same time decreases the thread processing time by exploiting more processors.