Matrix with number of nonzero more than 2147483647 about amgx

[marsaev]

Hello @kiendangtor ,

Unfortunately that is currently not supported for a single GPU.
Technically it seems that with modern GPUs it's feasible to run such matrices in a single GPU so it may make sense. AMGX actually instantiates num_rows/num_cols, num_nnz, and row_offsets, column_indices vector off the template parameter, but I haven't tried it with int64 and I believe in many places we assume int. Let me try to do test build with int64 and see if it's a lot of work to allow it - then maybe you can extend API in your local copy and make it work for your app.

[kiendangtor]

Thanks @marsaev i hope it will be feasible. I only need nnz to be int64 if it helps.