A dual shared stack for FSLM in Erika Enterprise

Recently, the flexible spin-lock model (FSLM) hasbeen introduced, unifying spin-based and suspension-based resourcesharing protocols for real-time multi-core platforms.Unlike the multiprocessor stack resource policy (MSRP), FSLMdoesn’t allow tasks on a core to share a single stack, however.In this paper, we present a hypothesis claiming that for arestricted range of spin-lock priorities, FSLM requires only twostacks. We briefly describe our implementation of a dual stackfor FSLM in the Erika Enterprise RTOS as instantiated on anAltera Nios II platform using 4 soft-core processors