In this paper we discuss evolutionary changes to FLASH to enable enhanced applications to run efficiently on both the current generation BG/P and the next generation BG/Q. We motivate the need for change by discussing current FLASH applications and the challenges they are facing on today’s architectures. Our solution to current challenges with a view to the next generation is mixed-mode MPI+Ope...

This memo discusses a simple many-core architecture for general-purpose computing, which is capable of the run-time adaptation towards desired corners of the performance-energy-reliability tradeoff space. In this architecture, processing cores are identical in their functional characteristics, but internally they are implemented differently in a fixed number of design styles, each optimised for...

In the past decades, multiple-point geostatistical methods (MPS) are increasing in popularity in various fields. Compared with the traditional techniques, MPS techni‐ ques have the ability to characterize geological reality that commonly has complex structures such as curvilinear and long-range channels by using high-order statistics for pattern reconstruction. As a result, the computational bu...

With the increasing architectural diversity of many-core architectures the challenges of parallel programming and code portability will sharply rise. The EU project PEPPHER addresses these issues with a component-based approach to application development on top of a taskparallel execution model. Central to this approach are multi-architectural components which encapsulate different implementati...

Processors incorporate more andmore cores. With the increasing core count, it becomes harder to implement convenient features like atomic operations, ordering of all memory operations, and hardware cache coherency. When these features are not supported by the hardware, applications become more complex. This makes programming these many-core architectures hard. This thesis defines programming mo...

In recent years, advancement in technology and computing led to huge amounts of data being generated. Thus, HighPerformance Computing (HPC) plays an ever growing role in processing these large datasets in a timely fashion. Our analysis consist of few important throughput computing app kernels which have high degree of parallelism and makes them excellent candidates for evaluation on high end mu...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 Examples of Highly-threaded Many-core Architectures . . . . . . . . . . . . 4 1.2 Research Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3 Methodology for Performance Modeling . . . . . . . ...

Computers will move from the multi-core reality of today to manycore. Instead of only a few cores on a chip, we will have thousands of cores available for use. This new architecture will force engineers to rethink OS design. It is the only way for operating systems to remain scalable even as the number of cores increases. Presented here are three design challenges of operating systems for many-...

Multigrid algorithms are among the fastest iterative methods known today for solving large linear and some non-linear systems of equations. Greatly optimized for serial operation, they still have a great potential for parallelism not fully realized. In this work, we present a novel multigrid algorithm designed to work entirely inside many-core architectures like the graphics processing units (G...

OF THE DISSERTATION Efficient Primitives and Algorithms for Many-core architectures Graphics Processing Units (GPUs) are a fast evolving architecture. Over the last decade their programmability has been harnessed to solve non-graphics tasks—in many cases at a huge performance advantage to CPUs. Unlike CPUs, GPUs have always been a highly parallel architecture—thousands of lightweight execution ...