Currently, many of the on-board processors released by semiconductor vendors are multi-core products that use Arm's Cortex architecture. In order to capitalize on the performance of multiprocessors, it is vital to use appropriate software. In this session, we will introduce the RTOS / multi-OS (Linux + RTOS) environment compatible with the latest SoC and specific system configurations with examples of adoption. We will also talk about the advantages of system development when the SoC of multi-core / heterogeneous / multi-core is adopted.