Title :
Power Consumption of Mixed Precision in the Iterative Solution of Sparse Linear Systems
Author :
Anzt, Hartwig ; Heuveline, Vincent ; Rocker, Björn ; Castillo, Maribel ; Fernandez, Juan Carlos ; Mayo, Rafael ; Quintana-Orti, Enrique S.
Author_Institution :
Inst. for Appl. & Numerical Math. 4, Karlsruhe Inst. of Technol., Karlsruhe, Germany
Abstract :
This paper presents a detailed analysis of a mixed precision iterative refinement solver applied to a linear system obtained from the 2D discretization of a fluid flow problem. The total execution time and energy need of different soft- and hardware implementations are measured and compared with those of a plain GMRES-based solver in double precision. The time and energy consumption of individual parts of the algorithm are monitored as well, enabling a deeper insight and the possibility of optimizing the energy consumption of the code on a general-purpose multi-core architecture and systems accelerated by a graphics processor.
Keywords :
computational fluid dynamics; computer graphic equipment; coprocessors; energy consumption; iterative methods; linear systems; multiprocessing systems; 2D discretization; GMRES based solver; energy consumption; fluid flow problem; general purpose multicore architecture; graphics processor; iterative solution; mixed precision iterative refinement solver; power consumption; sparse linear systems; Approximation methods; Energy consumption; Error correction; Graphics processing unit; Hardware; Iterative methods; Linear systems;
Conference_Titel :
Parallel and Distributed Processing Workshops and Phd Forum (IPDPSW), 2011 IEEE International Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-61284-425-1
Electronic_ISBN :
1530-2075
DOI :
10.1109/IPDPS.2011.226
