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CudaWrapper::MatrixFree crashes if quadrature points are not queried #15761

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peterrum opened this issue Jul 19, 2023 · 0 comments · Fixed by #15777
Closed

CudaWrapper::MatrixFree crashes if quadrature points are not queried #15761

peterrum opened this issue Jul 19, 2023 · 0 comments · Fixed by #15777
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Bug GPU

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@peterrum
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The relevant lines that cause the segmentation fault are:

dealii/include/deal.II/matrix_free/cuda_matrix_free.templates.h

Lines 207 to 209 in 0265947

auto q_points_host =
Kokkos::create_mirror_view(Kokkos::WithoutInitializing,
data->q_points[color]);

dealii/include/deal.II/matrix_free/cuda_matrix_free.templates.h

Line 218 in 0265947

auto q_points_host = Kokkos::create_mirror_view(data->q_points[color]);

There is no need to create a mirror view, since it is not used later on:

dealii/include/deal.II/matrix_free/cuda_matrix_free.templates.h

Line 255 in 0265947

if (update_flags & update_quadrature_points)

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CudaWrappers::MatrixFree: Only create required host mirrors masterleinad/dealii
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