A component-based framework for certification of components in a cloud of HPC services

HPC Shelfis a proposal of a cloud computing platform to provide component-oriented services for High Performance Computing (HPC) applications. This paper presents a Verification-as-a-Service (VaaS) framework for component certification onHPC Shelf. Certification is aimed at providing higher confidence that components of parallel computing systems ofHPC Shelfbehave as expected according to one or more requirements expressed in their contracts. To this end, new abstractions are introduced, starting with certifier components. They are designed to inspect other components and verify them for different types of functional, non-functional and behavioral requirements. The certification framework is naturally based on parallel computing techniques to speed up verification tasks.NORTE-01-0145- FEDER-000037

Cyclic Reference Counting with Permanent Objects

Reference Counting is the memory management technique of most widespread use today. Very often applications handle objects that are either permanent or get tenured. This paper uses this information to make cyclic reference counting more efficient

Coordinating Functional Processes with Haskell#

This paper presents Haskell#, a parallel functional language based on coordination. Haskell# supports lazy stream communication and facilities, at coordination level, to the specification of data parallel programs. Haskell# supports a clean and complete, semantic and syntactic, separation between coordination and computation levels of programming, with several benefits to parallel program engineering. The implementation of some well-known applications in Haskell# is presented, demonstrating its expressiveness, allowing for elegant, simple, and concise specification of any static pattern of parallel, concurrent or distributed computation