Requirements to embedded systems increase steadily. In parallel, also the performance of the processors used in these systems is improved leading to multithreaded and/or multicore architectures. Depending on the type of the embedded system, using Java is a more and more popular way for software development. In this paper, we present a Java benchmark suite that enables the comparison of different embedded Java platforms while solely assuming the availability of a CLDC API, the minimal configuration defined for the J2ME. The core of the benchmark suite consists of adapted realworld applications. Furthermore, the suite contains benchmarks to explore multi-core/multi-threaded systems. Hence, it is possible to determine the gain of a parallel execution platform compared to sequential execution. Additionally, the penalty of a sequential program running on a parallel platform can be measured. Our benchmarks are structured in micro, kernel, application, parallel, and streaming benchmarks. 1.

Safety-Critical Java (SCJ) is based on the Real-Time Specification for Java. To simplify the certification of Java programs, SCJ supports only a restricted scoped memory model. Individual threads share only immortal memory and the newly introduced mission memory. All other scoped memories are thread private. Furthermore, the notation of a maximum backing store requirement enables implementation of the scoped memories without fragmentation issues. In this paper we explore the implications of this new scoped memory model and possible simplifications in the implementation. It is possible to unify the three memory area types and provide a single class to represent all three memory areas of SCJ. The knowledge of the maximum storage requirements allows using nested backing stores in the implementation of the memory area representation. The proposed design of an SCJ compliant scope implementation is evaluated on an embedded Java processor.