出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We accelerate many-flavor lattice QCD simulations using multiple GPUs. Multiple pseudo- fermion fields are introduced additively and independently for each flavor in the many-flavor HMC algorithm. Using the independence of each pseudo-fermion field and the blocking tech- nique for the quark solver, we can assign the solver task to each GPU card. In this report we present the blocking technique for the many-flavor dynamical QCD simulations. We investigate the effect of the blocking and the acceleration with the multiple GPUs for the Schrödinger func- tional simulations with Wilson SU(3) plaquette gauge action and Nf = 10 Wilson fermions. Five pseudo-fermion fields are introduced and the quark solver task is distributed in the ratio of 2:3 to two GPUs. We expect a 40% timing reduction from the single GPU case and have observed a 34% timing reduction in the test simulations.
