This goes along with https://github.com/lattice/quda/pull/1019 and requires the QUDA PR to be merged first.
When GF, FF, FN link and CG are enabled for QUDA the first update_u call in the integrator will make the gauge filed resident in QUDA. QUDA will reload the gauge field from MILC after the reunitzrizations and the fermion force.
This goes along with https://github.com/lattice/quda/pull/1019 and requires the QUDA PR to be merged first. When GF, FF, FN link and CG are enabled for QUDA the first update_u call in the integrator will make the gauge filed resident in QUDA. QUDA will reload the gauge field from MILC after the reunitzrizations and the fermion force.
This significantly reduces CPU<->GPU transfers.