We present oSCJ, an implementation of the draft of Safety Critical Java (SCJ) specification. SCJ is designed to make Java amenable to writing mission- and safety-critical software. It does this by defining a subset of the Real-time Specification for Java that trades expressiveness for verifiability. This paper gives a high-level description of our implementation of the first compliance level of the SCJ specification, a library called oSCJ, and reports on performance evaluation on the Ovm real-time Java virtual machine. We compare SCJ to C on both a real-time operating system on the LEON3 platform and Linux on a x86. Our results suggest that a high-degree of predictability and competitive performance can indeed be achieved

One of the important features of any real-time software is the worst-case execution time (WCET). To get an understanding of the timing behavior of real-time systems and to prove that the real-time software meets its deadlines, WCET analysis is performed. Today, researchers actively develop new WCET analysis methods and tools. Therefore, they need benchmark programs to evaluate and compare their work. To meet this need, in this study we present a new benchmark suite, called MBBench. MBBench includes a collection of C programs for Linux operating system and RTEMS real-time operating system. Its main aim is to help the evaluation and comparison of measurement-based WCET analysis methods/tools. MBBench has been published as open source. It can be obtained freely over the Internet.