CXML includes a parallel version of the library for SMP configuration. The parallel CXML library is only available on platforms that support SMP, including Tru64 Unix.
The parallel library contains the exact same set of subroutines with the same name and calling standards with a subset of the routines parallelized to take advantage of additional CPUs. The following routines are parallelized in this version of CXML.
{S,D,C,Z}GEMV BLAS2
{S,D,C,Z}GEMM BLAS3
{S,D,C,Z}GETRF LAPACK
{S,D,C,Z}POTRF
{S,D,C,Z}FFT Signal Processing - 1D
{S,D,C,Z}FFT_APPLY
{S,D,C,Z}FFT_INIT
{S,D,C,Z}FFT_EXIT
{S,D,C,Z}FFT_2D Signal Processing - 2D
{S,D,C,Z}FFT_INIT_2D
{S,D,C,Z}FFT_APPLY_2D
{S,D,C,Z}FFT_EXIT_2D
{S,D,C,Z}FFT_3D Signal Processing - 3D
{S,D,C,Z}FFT_INIT_3D
{S,D,C,Z}FFT_APPLY_3D
{S,D,C,Z}FFT_EXIT_3D
DITSOL_DRIVER Iterative Solvers
DITSOL_PBCG
DITSOL_PCG
DITSOL_PCGS
DITSOL_PGMRES
DITSOL_PLSCG
DITSOL_PTFQMR
DMATVEC_GENR
DMATVEC_SDIA
DMATVEC_UDIA
DCREATE_DIAG_GENR
DCREATE_DIAG_SDIA
DCREATE_DIAG_UDIA
DAPPLY_DIAG_ALL
DCREATE_POLY_GENR
DCREATE_POLY_SDIA
DCREATE_POLY_UDIA
DAPPLY_POLY_GENR
DAPPLY_POLY_SDIA
DAPPLY_POLY_UDIA
DSS_CREATE Direct Sparse Solvers
DSS_DEFINE_STRUCTURE
DSS_REORDER
DSS_FACTOR_REAL
DSS_FACTOR_COMPLEX
DSS_SOLVE_REAL
DSS_SOLVE_COMPLEX
| f77 my_prog.f -lcxmlp |
However, the user can control the number of threads created (and consequently the number of processors used) by setting the environment variable OMP_NUM_THREADS.
For example, the parallel version of the CXML will create three execution threads if the following command is entered:
> setenv OMP_NUM_THREADS 3
NOTE: Do not set OMP_NUM_THREADS to a value greater than the number of physical processors. This is likely to cause severe performance degradation.