Welcome to the Fourth Conference of Research Software Engineering, held at the University of Birmingham. For directions to and during the event, see the campus maps page.
In the Aston Webb Building near to the registration/reception desk, a cloakroom is available in room G30 along with a quiet room in G31.
An old serial program for Lattice Field Theory Simulations, initially written in fixed-form Fortran during decades of research work, needed to be optimised for modern architectures. In this talk I will describe the challenges, the decisions, and the steps we took in order to improve its performance and its scientific output (which is a multi-level optimisation problem), discuss the tools used and the experience we had with them (Intel VTune, ITAC, the Scalasca suite and the BSC Performance Tools), and report our - sometimes surprising - findings.
