An implementation of the flexible spin-lock model in ERIKA Enterprise on a multi-core platform

Recently, the flexible spin-lock model (FSLM) has been introduced, unifying spin-based and suspension-based resource sharing protocols for real-time multiprocessor platforms by explicitly identifying the spin-lock priority as a parameter.Earlier work focused on the definition of a protocol for FSLM and its corresponding analysis under the assumption that various types of implementation overhead could be ignored.In this paper, we briefly describe an implementation of the FSLM for a selected range of spin-lock priorities in the ERIKA Enterprise RTOS as instantiated on an Altera Nios II platform using 4 soft-core processors. Moreover, we present measurement results for the protocol specific overhead of FSLM as well as thenatively provided multiprocessor stack resource policy (MSRP).Given these results, we are now in a position to judge when it is advantageous to use either MSRP or FMLP for our system set-up for given global resource access times of tasks