Parallel Implementation and Performance Analysis of ILU Family Preconditioners
Bo YangLogin to View Article
In this work, we implemented the the ILU(0), ILU(k), ILUT and decoupled block-wise ILU(k) preconditioners for Krylovlinear solvers on GPU. They have Favorable parallel performance with over 5 times speedup obtained in general. Following ILU-preconditioner Characteristics are verified:
–ILU(0) has better parallel performance than ILUT.
–ILUT has better convergence than ILU(0).
–Better convergence is obtained by higher k or higher block size because of more fill-in entries.
–Favorable parallel performance is obtained for lower k and lower block size.
We can see that ILU-preconditioned linear solver on GPU workstations is a reasonable acceleration solution for reservoir simulation.