We have previously presented an approach to include graphics processing
units
as co-processors in a parallel Finite Element multigrid solver called
FEAST.
In this paper we show that the acceleration transfers to real applications
built on top of FEAST, without any modifications of the application
code. The
chosen solid mechanics code is well suited to assess the practicability
of our
approach due to higher accuracy requirements and a more diverse
CPU/co-processor
interaction. We demonstrate in detail that the single precision
execution of the
co-processor does not affect the final accuracy, and analyse how the local
acceleration gains of factors 5.5-9.0 translate into 1.6- to 2.6-fold total
speed-up.