Open Source Summit North America 2025

SoCs are increasingly heterogeneous, featuring multiple processor clusters and special-purpose accelerators. As a result, Asymmetric Multiprocessing (AMP) systems must support different operating environments running concurrently on the same chip. This talk outlines the software architecture needed to develop applications for AMP setups, enabling operating systems to interact across diverse homogeneous and heterogeneous configurations. In this way, AMP applications can leverage the parallelism provided by these varied architectures.

Our prototyping efforts focus on low-cost RISC-V processor cores configured as AMP systems, running both the Linux kernel and RTOSes such as ThreadX. This setup includes an IPC layer that implements RPMSG communication between cores. Additionally, our proxy infrastructure highlights how a proxy on the master core can handle POSIX library calls from RTOS-based remote contexts.