Much recent planning research has focused on two related issues. First, there has been a strong interest in information-gathering (or \sensing", or \knowledge-producing") actions. Second, has been an investigation of plans with sophisticated control structures, such as conditional branches and loops. But the combination of these two lines of research poses a representational problem: plans with...

To take advantage of multicore parallelism, programmers and compilers rewrite, or transform, programs to expose loop-level parallelism. Showing the correctness, or legality, of such program transformations enables their incorporation into compilers. However, the correctness of inspector/executor strategies, which develop parallel schedules at runtime for computations with nonaffine array access...

Elasticity is highly desirable for stream processing systems to guarantee low latency against workload dynamics, such as surges in data arrival rate and fluctuations in data distribution. Existing systems achieve elasticity following a resource-centric approach that uses dynamic key partitioning across the parallel instances, i.e. executors, to balance the workload and scale operators. However,...

APEX: the APL Parallel Executor Robert Bernecky Master of Science Graduate Department of Computer Science University of Toronto 1997 APEX is an APL-to-SISAL compiler, generating high-performance, portable, parallel code that executes up to several hundred times faster than interpreted APL, with serial performance of kernels competitive with FORTRAN. Preliminary results indicate that acceptable ...

Scalability is one of the most important quality attribute software-intensive systems, because it maintains an effective performance parallel to large fluctuating and sometimes unpredictable workload. In order achieve scalability, thread pool system (TPS) (which also known as executor service) has been used extensively a middleware service in systems. TPS optimization challenging problem that d...

This paper explores the benefits and limitations of using a inspector/executor approach for Software Distributed Shared Memory (SDSM) systems. The role of the inspector is to obtain a description of the address space accessed during the execution of parallel loops. The information collected by the inspector will enable the runtime to optimize the movement of shared data that will happen during ...

The present study aims to provide insight into the value of different teacher roles in designing and implementing technology-rich learning activities for early literacy. Three cases, each with a different teacher role (executoronly, re-designer, co-designer) were examined. In the executor-only role, teachers implemented ready-made activities. In the re-designer role teachers collaboratively re-...

Sparse matrix problems are diicult to parallelize eeciently on distributed memory machines since data is often accessed indirectly. Inspector/executor strategies, which are typically used to parallelize loops with indirect references, incur substantial run-time preprocessing overheads when references with multiple levels of indirection are encountered | a frequent occurrence in sparse matrix al...