fdurastante/amg4psblas
1
0
Fork 0
mirror of https://github.com/sfilippone/amg4psblas.git synced 2026-10-18 20:02:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

New docs for release: merged Daniela's comments.

Browse Source
This commit is contained in:
Salvatore Filippone
2017-07-17 15:24:32 +01:00
parent 9330489e6e
commit 6097a8fbb6
12 changed files with 246 additions and 630 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/src/gettingstarted.tex
+18 -18
View File
@@ -70,7 +70,7 @@ No preconditioner &\verb|'NOPREC'|& Considered only to use the PSBLAS
Krylov solvers with no preconditioner. \\ \hline
Diagonal & \verb|'DIAG'| or \verb|'JACOBI'| & Diagonal preconditioner.
For any zero diagonal entry of the matrix to be preconditioned,
the corresponding entry of he preconditioner is set to~1.\\ \hline
the corresponding entry of the preconditioner is set to~1.\\ \hline
Block Jacobi & \verb|'BJAC'| & Block-Jacobi with ILU(0) on the local blocks.\\ \hline
Additive Schwarz & \verb|'AS'| & Restricted Additive Schwarz (RAS),
with overlap~1 and ILU(0) on the local blocks. \\ \hline
@@ -176,11 +176,11 @@ the corresponding codes are available in \verb|examples/fileread/|.
! with basic smoothed aggregation, 1 hybrid forward/backward
! GS sweep as pre/post-smoother and UMFPACK as coarsest-level
! solver
call P%init(P,'ML',info)
call P%init('ML',info)
!
! build the preconditioner
call P%hierarchy_build(A,desc_A,P,info)
call P%smoothers_build(A,desc_A,P,info)
call P%hierarchy_build(A,desc_A,info)
call P%smoothers_build(A,desc_A,info)
!
! set the solver parameters and the initial guess
@@ -191,7 +191,7 @@ the corresponding codes are available in \verb|examples/fileread/|.
... ...
!
! deallocate the preconditioner
call P%free(P,info)
call P%free(info)
!
! deallocate other data structures
... ...
@@ -260,12 +260,12 @@ boundary conditions are also available in the directory \verb|examples/pdegen|.
! build a V-cycle preconditioner with 1 block-Jacobi sweep (with
! ILU(0) on the blocks) as pre- and post-smoother, and 8 block-Jacobi
! sweeps (with ILU(0) on the blocks) as coarsest-level solver
call P%init(P,'ML',info)
call_P%set(P,'SMOOTHER_TYPE','BJAC',info)
call P%set(P,'COARSE_SOLVE','BJAC',info)
call P%set(P,'COARSE_SWEEPS',8,info)
call P%hierarchy_build(A,desc_A,P,info)
call P%smoothers_build(A,desc_A,P,info)
call P%init('ML',info)
call_P%set('SMOOTHER_TYPE','BJAC',info)
call P%set('COARSE_SOLVE','BJAC',info)
call P%set('COARSE_SWEEPS',8,info)
call P%hierarchy_build(A,desc_A,info)
call P%smoothers_build(A,desc_A,info)
... ...
\end{verbatim}
}
@@ -284,17 +284,17 @@ boundary conditions are also available in the directory \verb|examples/pdegen|.
! build a W-cycle preconditioner with 2 Gauss-Seidel sweeps as
! post-smoother (and no pre-smoother), a distributed coarsest
! matrix, and MUMPS as coarsest-level solver
call P%init(P,'ML',info)
call P%init('ML',info)
call P%set('ML_TYPE','WCYCLE',info)
call P%set('SMOOTHER_TYPE','GS',info)
call P%set('SMOOTHER_SWEEPS',0,info,pos='PRE')
call P%set('SMOOTHER_SWEEPS',2,info,pos='POST')
call P%set('COARSE_SOLVE','MUMPS',info)
call P%set('COARSE_MAT','DIST',info)
call P%hierarchy_build(A,desc_A,P,info)
call P%smoothers_build(A,desc_A,P,info)
call P%hierarchy_build(A,desc_A,info)
call P%smoothers_build(A,desc_A,info)
... ...
! solve Ax=b with preconditioned CG
! solve Ax=b with preconditioned BiCGSTAB
call psb_krylov('BICGSTAB',A,P,b,x,tol,desc_A,info)
\end{verbatim}
}
@@ -310,9 +310,9 @@ boundary conditions are also available in the directory \verb|examples/pdegen|.
\begin{verbatim}
... ...
! set RAS with overlap 2 and ILU(0) on the local blocks
call P%init(P,'AS',info)
call P%set(P,'SUB_OVR',2,info)
call P%bld(A,desc_A,P,info)
call P%init('AS',info)
call P%set('SUB_OVR',2,info)
call P%bld(A,desc_A,info)
... ...
\end{verbatim}
}