The Pipeline parameter in the ExternalInverter section for QUDA needs to be reevaluated. The actual accumulator pipeline length needs to be made configurable and likely made available on a per-monomial / per-operator basis. (https://github.com/lattice/quda/blob/a979a4d6903883de74c4ee6271ef3b5190a22128/include/quda.h#L161)