Vector-valued matrix-free operatior with CUDA

[Justin O'Connor]

Howdy!

I see here:

https://github.com/dealii/dealii/issues/4399

that using cuda for matrix-free operators with multiple components has been discussed before, and I think it is referenced again here 

https://github.com/dealii/dealii/issues/7037

but this issue hasn't been referenced by 2019. Has anyone been trying this?

Would it be at all possible to use the existing framework to grab the individual components, and work with them inside the loop to do the operations I need? And then somehow put the results into the result vector from there?

Thank you,

Justin

[Daniel Arndt]

Justin,

As far as I know, we haven't made any significant progress with vector-valued support for CudaWrappers::MatrixFree (apart from porting it to Kokkos).

What's your specific use case? What functionality do you need specifically (same finite elements? FESystsem?)?

Best,

Daniel

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[Justin O'Connor]

I'm hoping to do linear elasticity, similar to step 8, so a FESystem of dim identical FE_Qs