Gauge Field Generation on Large-Scale GPU-Enabled Systems

Understand

Over the past years GPUs have been successfully applied to the task of inverting the fermion matrix in lattice QCD calculations.

• Even strong scaling to capability-level supercomputers, corresponding to O(100) GPUs or more has been achieved.
• However strong scaling a whole gauge field generation algorithm to this regim requires significantly more functionality than just having the matrix inverter utilizing the GPUs and has not yet been accomplished.
• This contribution extends QDP-JIT, the migration of SciDAC QDP++ to GPU-enabled parallel systems, to help to strong scale the whole Hybrid Monte-Carlo to this regime.