gem5 parsec2.1 Region of Interest explations

参考：http://parsec.cs.princeton.edu/doc/man/man7/hooks.7.html

原文：The PARSEC hook functions also define a Region-of-Interest for each workload. This code region is the part of the workload which performs the "interesting" computations. It includes the whole parallel phase, but not the initialization and cleanup functionality. Researchers should eliminate the impact of initialization and cleanup to avoid distortions of their measurements.

解析：ROI指感兴趣的部分，即工作集主要运算的部分，不包含初始化和功能性清理等。