J Supercomput manuscript No. (will be inserted by the editor) Design of scalable Java message-passing communications over

Abstract This paper presents ibvdev a scalable and efficient low-level Java message-passing communication device over InfiniBand. The continuous in-crease in the number of cores per processor underscores the need for efficient communication support for parallel solutions. Moreover, current system de-ployments are aggregating a significant number of cores through advanced network technologies, such as InfiniBand, increasing the complexity of com-munication protocols, especially when dealing with hybrid shared/distributed memory architectures such as clusters. Here, Java represents an attractive choice for the development of communication middleware for these systems, as it provides built-in networking and multithreading support. As the gap between Java and compiled languages performance has been narrowing for the last years, Java is an emerging option for High Performance Computing (HPC). The developed communication middleware ibvdev increases Java appli-cations performance on clusters of multi-core processors interconnected vi