Experiences from the Roadrunner petascale hybrid systems
Darren J. Kerbyson, Scott Pakin, Michael Lang, Jose Carlos Sancho Pitarch, Kei Davis, KEVIN J. BARKER, Josh Peraza · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2010
The combination of flexible microprocessors (AMD Opterons) with high-performing accelerators (IBM PowerXCell 8i) resulted in the extremely powerful Roadrunner system. Many challenges in both hardware and software were overcome to achieve its goals. In this talk we detail some of the experiences in achieving performance on the Roadrunner system. In particular we examine several implementations of the kernel application, Sweep3D, using a work-queue approach, a more portable Thread-building-blocks approach, and an MPI on the accelerator approach.