[petsc-users] Port existing GMRES+ILU(0) implementation to GPU

[Junchao Zhang]

Hello Feng,
  It is possible to run GMRES with ILU(0) on GPUs.  You may need to
configure PETSc with CUDA (--with-cuda --with-cudac=nvcc) or Kokkos (with
extra --download-kokkos  --download-kokkos-kernels).  Then run with
-mat_type {aijcusparse or aijkokkos}  -vec_type {cuda or kokkos}.
  But triangular solve is not GPU friendly and the performance might be
poor.  But you should try it, I think.

Thanks!
--Junchao Zhang

On Sun, Feb 8, 2026 at 5:46 PM feng wang <snailsoar at hotmail.com> wrote:

> Dear All,
>
> I have an existing implementation of GMRES with ILU(0), it works well for
> cpu now. I went through the Petsc documentation, it seems Petsc has some
> support for GPUs. is it possible for me to run GMRES with ILU(0) in GPUs?
>
> Many thanks for your help in advance,
> Feng
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20260208/f05adb27/attachment.html>