Flip nv_uvm_pref_gpu default to false

Author: ntselepidis

src/simulation/m_global_parameters.fpp

@@ -164,7 +164,7 @@ module m_global_parameters
                                        ! 1 => jac on GPU, jac_rhs and jac_old on CPU
                                        ! 2 => jac and jac_rhs on GPU, jac_old on CPU
                                        ! 3 => jac, jac_rhs, and jac_old on GPU (default)
-    logical :: nv_uvm_pref_gpu ! Enable explicit gpu memory hints (default TRUE)
+    logical :: nv_uvm_pref_gpu ! Enable explicit gpu memory hints (default FALSE)
     !> @}
 
     real(wp) :: weno_eps       !< Binding for the WENO nonlinear weights
@@ -586,7 +586,7 @@ contains
         ! NVIDIA UVM options
         nv_uvm_out_of_core = .false.
         nv_uvm_igr_temps_on_gpu = 3 ! => jac, jac_rhs, and jac_old on GPU (default)
-        nv_uvm_pref_gpu = .true.
+        nv_uvm_pref_gpu = .false.
 
         ! Simulation algorithm parameters
         model_eqns = dflt_int