SafeSU: an Extended Statistics Unit for Multicore Timing Interference

Statistics units (SUs) in MPSoCs are becoming increasingly used for the (1) verification and (2) validation of multicore timing interference, as well as for (3) deploying safety measures in safety-related real-time systems. However, existing SU extensions to manage multicore timing interference have neither been integrated together nor deployed in commercial MPSoCs.This paper presents the realization of the Safe Statistics Unit (SafeSU for short), which smartly integrates existing solutions for multicore timing interference verification, validation and monitoring, and is in turn integrated in commercial space-graded RISC-V and SparcV8 MPSoCs. Our evaluation illustrates the operation of the SafeSU, and paves the way for a thorough validation prior to reaching commercialization and being offered as open source IP.