elpa1 Module Reference

Fortran module which provides the routines to use the one-stage ELPA solver. More...

Data Types
interface	solve_evp_complex_1stage_double
	solve_evp_complex_1stage_double: Fortran function to solve the complex eigenvalue problem with 1-stage solver. This is called by "elpa_solve_evp_complex" More...
interface	solve_evp_real_1stage_double
	elpa_solve_evp_real_1stage_double: Fortran function to solve the real eigenvalue problem with 1-stage solver. This is called by "elpa_solve_evp_real" More...

Functions/Subroutines
integer(kind=c_int) function, public	elpa_get_communicators (mpi_comm_global, my_prow, my_pcol, mpi_comm_rows, mpi_comm_cols)

Variables
real(kind=c_double), public	time_evp_fwd
	time for forward transformations (to tridiagonal form) More...
real(kind=c_double), public	time_evp_solve
	time for solving the tridiagonal system More...
real(kind=c_double), public	time_evp_back
	time for back transformations of eigenvectors More...
logical, public	elpa_print_times = .false.
	Set elpa_print_times to .true. for explicit timing outputs. More...

Detailed Description

Fortran module which provides the routines to use the one-stage ELPA solver.

Function/Subroutine Documentation

elpa_get_communicators()

integer(kind=c_int) function, public elpa1::elpa_get_communicators	(	integer(kind=c_int), intent(in)	mpi_comm_global,
		integer(kind=c_int), intent(in)	my_prow,
		integer(kind=c_int), intent(in)	my_pcol,
		integer(kind=c_int), intent(out)	mpi_comm_rows,
		integer(kind=c_int), intent(out)	mpi_comm_cols
	)

Parameters

mpi_comm_global	Global communicator for the calculations (in)
my_prow	Row coordinate of the calling process in the process grid (in)
my_pcol	Column coordinate of the calling process in the process grid (in)
mpi_comm_rows	Communicator for communicating within rows of processes (out)
mpi_comm_cols	Communicator for communicating within columns of processes (out)

Returns

mpierr integer error value of mpi_comm_split function

Variable Documentation

elpa_print_times

logical, public elpa1::elpa_print_times = .false.

Set elpa_print_times to .true. for explicit timing outputs.

time_evp_back

real(kind=c_double), public elpa1::time_evp_back

time for back transformations of eigenvectors

time_evp_fwd

real(kind=c_double), public elpa1::time_evp_fwd

time for forward transformations (to tridiagonal form)

time_evp_solve

real(kind=c_double), public elpa1::time_evp_solve

time for solving the tridiagonal system