Inside a function called from main(), I am trying to iterate over the elements of a CUDA LibTorch tensor in CPP.
I fail with both accessor<double, 3>() and packed_accessor<double, 3>(), similarly with packed_accessor64<double, 3>().
The accessor is created fine, but when I try to index any element from the underlying tensor, for example:
auto Psi_spec_abs_acc = Psi_spec_abs.packed_accessor<double, 3>();
std::cout << Psi_spec_abs_acc [0][0][0] << std::endl;
It fails with segfault.
How could I iterate over a CUDA tensor without putting it into the CPU?
Thank you!