RDMA-Based Sampling Port of ARINC-653

ARINC-653, a standard of avionics software platform, defines the sampling communication port that provides only the latest message while discarding old messages. This sampling port is particularly efficient at transmitting sensing data that reflects the actual state of target system without message queueing delay. In this letter, we implement the ARINC-653 sampling port by exploiting remote direct memory access (RDMA) over Ethernet that can directly move data to/from remote memory without CPU intervention on the remote node. We propose two different designs to utilize two-sided RDMA and one-sided RDMA operations, respectively. Performance measurement results show that the sampling port over one-sided RDMA provides lower-communication latency, stronger temporal partitioning, and better-message timeliness than two-sided RDMA and Berkeley sockets-based implementations.