http://xyst.i2p/classinciter_1_1_transporter.html
After this global sum a non-zero vector result indicates a leak, e.g., a hole in the boundary, which indicates an error in the boundary face data structures used to compute the partial surface integrals. void inciter:: Transporter:: refined ( std::size_t summeshid,
std::size_t nelem,
std::size_t npoin) Reduction target: all chares have refined their mesh.