Infinileap: Modern High-Performance Networking for Distributed Java Applications based on RDMA

In this paper, we propose Infinileap, a modern networking framework enabling high-performance memory transfer mechanisms like Remote Direct Memory Access (RDMA) for applications written in Java. Infinileap is based on the Open Communication X (UCX) framework, which is accessed from Java. This is accomplished through Oracle's Project Panama, which is currently in the preview phase and aims to significantly improve interoperability between Java and “foreign” languages, such as C. In contrast to often used internal and unsupported JDK APIs, Project Panama's APIs are explicitly intended for use and developers are encouraged to adapt their existing code accordingly. Using Project Panama, we implement an object as well as future-oriented framework based on UCX. Our experiments show that Infinileap and thus Project Panama's innovations work reliably and efficiently under heavy load and also, within benchmarks implemented for this purpose based on the Java Microbenchmark Harness (JMH), achieve very good performance results with over 110 million messages per second and round-trip latencies below two microseconds with a single ConnectX-5 InfiniBand (single-port) network interface controller.