[petsc-users] Shell matrix MatCreateVecs

[Jose E. Roman]

> El 24 ago 2017, a las 22:51, Greg Meyer <gregory.meyer at gmail.com> escribió:
> 
> Hi,
> 
> I have written a shell matrix for non-standard vectors (CUDA to be specific) that works great. MatMult and MatNorm perform as they should. However, when I try to use it in a SLEPc algorithm, it breaks because MatCreateVecs yields standard vectors even if I set "-vec_type cuda". Looking through the source etc. it seems that MatShellSetOperation can't be used to implement a new MatCreateVecs function (MATOP_CREATEVECS does not exist). Is there a way to change the type of vector that comes from MatCreateVecs for shell matrices?
> 
> Thanks in advance,
> Greg

It is MATOP_GET_VECS. If you implement this operation, most SLEPc functionality should work with CUDA.

PETSc developers: shouldn't MATOP_GET_VECS be renamed to MATOP_CREATE_VECS ?

Jose