[petsc-users] Offloading linear solves in time stepper to GPU

[Barry Smith]

> On May 30, 2015, at 8:44 PM, Harshad Sahasrabudhe <hsahasra at purdue.edu> wrote:
> 
> Hi,
> 
> I need to offload the linear solves in a time stepper to GPUs. I'll be using the MAGMA sparse iterative solvers. What is the simplest way to achieve this? Is is better to write a new KSPType or is there a KSP wrapper which I can use?

   We do not have any KSPType for the MAGMA sparse iterative solvers.

   Is your plan to use a single MPI process (that is the same as a sequential program) and ONE GPU for the solver or do you wish to have MPI parallelism for the linear solver where each MPI process uses a GPU for its part?

  Barry

> 
> Many thanks,
> Harshad