Serial C version was developed the Center for Manycore Programming at Seoul National University and derived from the serial Fortran versions in "NPB3.3-SER" developed by NAS.
OpenACC version was developed by Rengan Xu & Sunita Chandrasekaran from University of Houston.
Block Tridiagonal Solver for 3D PDE
BT solves a 3D discretization of Naiver-Stokes equation: Ku=r where u and r are 5x1 vectors defined at the points of a 3D rectangular grid and K is a 7 diagonal block matrix of 5x5 blocks. K = BTx * BTy * BTz where BTx, BTy and BTz are block tridiagonal matrices of 5x5 blocks in x, y and z directions, respectively. The main iteration loop of BT starts from the computation of r (compute_rhs) followed by successive inversion of BTx, BTy and BTz (x_solve, y_solve and z_solve) and the result is stored in the main variable u.
The input dataset size is comprised of W, A, B classes.
Test: class W reference data for 24X24X24 grids after 200 time steps,
Train: class A reference data for 64X64X64 grids after 200 time steps
Ref: class B reference data for 102X102X102 grids after 200 time steps
It prints out the 5x1 vector in u.