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C. Kessler, U. Dastgeer, S. Thibault, R. Namyst, A. Richards, U. Dolinsky, S. Benkner, J. Träff, S. Pllana:
"Programmability and Performance Portability Aspects of Heterogeneous Multi-/Manycore Systems";
Talk: Design, Automation & Test in Europe Conference & Exhibition (DATE 2012), Dresden, Germany; 2012-03-12 - 2012-03-16; in: "Design, Automation & Test in Europe Conference & Exhibition (DATE 2012) Proceedings", EDAA, (2012), ISBN: 978-3-9810801-8-6; 1403 - 1408.

We discuss three complementary approaches that can provide both portability and an increased level of abstraction for the programming of heterogeneous multicore systems. Together, these approaches also support performance portability, as currently investigated in the EU FP7 project PEPPHER. In particular, we consider (1) a library-based approach, here represented by the integration of the SkePU C++ skeleton programming library with the StarPU runtime system for dynamic scheduling and dynamic selection of suitable execution units for parallel tasks; (2) a language-based approach, here represented
by the Offload-C++ high-level language extensions and Offload
compiler to generate platform-specific code; and (3) a componentbased
approach, specifically the PEPPHER component system for annotating user-level application components with performance metadata, thereby preparing them for performance-aware composition. We discuss the strengths and weaknesses of these approaches and show how they could complement each other in an integrational programming framework for heterogeneous multicore systems.

Project Head Jesper Larsson Träff:
Performance Portability and Programmability for Heterogeneous Many-core Architectures