Improving the memory management performance of RTSJ

Abstract

To cite this version:M. Teresa Higuera-Toledano, Valérie Issarny. Improving the memory management performance of RTSJ. SUMMARYFrom a real-time perspective, the garbage collector (GC) introduces unpredictable pauses that are not tolerated by real-time tasks. Real-time collectors eliminate this problem but introduce a high overhead. Another approach is to use memory regions (MRs) within which allocation and deallocation is customized. This facility is supported by the memory model of the Real-Time Specification for Java (RTSJ). RTSJ imposes strict access and assignment rules to avoid both the dangling inter-region references and the delays of critical tasks of the GC. A dynamic check solution can incur high overhead, which can be reduced by taking advantage of hardware features. This paper provides an in-depth analytical investigation of the overhead introduced by dynamic assignments checks in RTSJ, describing and analysing several solutions to reduce the introduced overhead.

Non‐functional information transmission patterns for distributed real‐time Java

“…The authors are evaluating empirically the performance and adaptation performance that may be expected from a generic distributed manager too. This includes its automatic configuration 49–51 and the use of software and hardware virtual machine optimizations 36, 52–56. The aim is to discern which of them are important from the point of view of an end‐to‐end remote invocation.…”