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269 lines
9.3 KiB
Fortran
269 lines
9.3 KiB
Fortran
!!$
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!!$
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!!$ MLD2P4
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!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
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!!$ based on PSBLAS (Parallel Sparse BLAS v.2.0)
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!!$
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!!$ (C) Copyright 2007 Alfredo Buttari University of Rome Tor Vergata
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!!$ Pasqua D'Ambra ICAR-CNR, Naples
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!!$ Daniela di Serafino Second University of Naples
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$
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!!$ Redistribution and use in source and binary forms, with or without
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!!$ modification, are permitted provided that the following conditions
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!!$ are met:
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!!$ 1. Redistributions of source code must retain the above copyright
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!!$ notice, this list of conditions and the following disclaimer.
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!!$ 2. Redistributions in binary form must reproduce the above copyright
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!!$ notice, this list of conditions, and the following disclaimer in the
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!!$ documentation and/or other materials provided with the distribution.
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!!$ 3. The name of the MLD2P4 group or the names of its contributors may
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!!$ not be used to endorse or promote products derived from this
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!!$ software without specific written permission.
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!!$
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!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MLD2P4 GROUP OR ITS CONTRIBUTORS
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!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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!!$ POSSIBILITY OF SUCH DAMAGE.
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!!$
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!!$
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! File: mld_zasmat_bld.f90
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!
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! Subroutine: mld_zasmat_bld
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! Version: complex
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!
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! This routine builds the communication descriptor associated to the extended
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! matrices that form the Additive Schwarz (AS) preconditioner and retrieves
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! the remote pieces needed to build the local extended matrix. If the
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! preconditioner is the block-Jacobi one, the routine makes only a copy of
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! the descriptor of the original matrix.
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!
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!
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! Arguments:
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! ptype - integer, input.
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! The type of preconditioner to be built. Only the values
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! mld_bjac_ and mld_as_ (see mld_prec_type.f90) are allowed.
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! novr - integer, input.
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! The number of overlap layers in the AS preconditioner.
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! a - type(psb_zspmat_type), input.
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! The sparse matrix structure containing the local part of the
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! matrix to be preconditioned.
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! blk - type(psb_zspmat_type), output.
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! The sparse matrix structure containing the remote rows that
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! extend the local matrix according to novr. If novr = 0 then
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! blk does not contain any row.
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! desc_data - type(psb_desc_type), input.
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! The communication descriptor of the sparse matrix a.
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! desc_p - type(psb_desc_type), output.
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! The communication descriptor associated to the extended
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! matrices that form the AS preconditioner.
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! info - integer, output.
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! Error code.
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! outfmt - character(len=5), optional.
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! The storage format of the local extended matrix for the AS
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! preconditioner. Currently outfmt is set to 'CSR' by the
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! calling routine mld_bjac_bld.
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!
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subroutine mld_zasmat_bld(ptype,novr,a,blk,desc_data,upd,desc_p,info,outfmt)
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use psb_base_mod
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use mld_prec_mod, mld_protect_name => mld_zasmat_bld
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Implicit None
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! Arguments
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integer, intent(in) :: ptype,novr
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Type(psb_zspmat_type), Intent(in) :: a
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Type(psb_zspmat_type), Intent(inout) :: blk
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integer, intent(out) :: info
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Type(psb_desc_type), Intent(inout) :: desc_p
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Type(psb_desc_type), Intent(in) :: desc_data
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Character, Intent(in) :: upd
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character(len=5), optional :: outfmt
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! Local variables
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integer icomm
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Integer :: np,me,nnzero,&
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& ictxt, n_col,int_err(5),&
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& tot_recv, n_row,nhalo, nrow_a,err_act
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integer :: debug_level, debug_unit
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character(len=20) :: name, ch_err
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name='mld_zasmat_bld'
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if(psb_get_errstatus() /= 0) return
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info=0
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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If (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& ' start ', upd
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ictxt = psb_cd_get_context(desc_data)
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icomm = psb_cd_get_mpic(desc_data)
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Call psb_info(ictxt, me, np)
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tot_recv=0
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nrow_a = desc_data%matrix_data(psb_n_row_)
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nnzero = Size(a%aspk)
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n_col = desc_data%matrix_data(psb_n_col_)
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nhalo = n_col-nrow_a
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select case (ptype)
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case (mld_bjac_)
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!
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! Block-Jacobi preconditioner. Copy the descriptor, just in case
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! we want to renumber the rows and columns of the matrix.
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!
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call psb_sp_all(0,0,blk,1,info)
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if(info /= 0) then
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info=4010
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ch_err='psb_sp_all'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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blk%fida = 'COO'
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blk%infoa(psb_nnz_) = 0
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If (upd == 'F') Then
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call psb_cdcpy(desc_data,desc_p,info)
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If(debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& ' done cdcpy'
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if(info /= 0) then
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info=4010
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ch_err='psb_cdcpy'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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endif
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case(mld_as_)
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!
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! Additive Schwarz
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!
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if (novr < 0) then
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info=3
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int_err(1)=novr
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call psb_errpush(info,name,i_err=int_err)
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goto 9999
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endif
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if ((novr == 0).or.(np==1)) then
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!
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! Actually, this is just block Jacobi
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!
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If(debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& ' calling allocate novr=0'
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call psb_sp_all(0,0,blk,1,info)
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if(info /= 0) then
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info=4010
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ch_err='psb_sp_all'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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blk%fida = 'COO'
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blk%infoa(psb_nnz_) = 0
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Calling desccpy'
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if (upd == 'F') then
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call psb_cdcpy(desc_data,desc_p,info)
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If(debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& ' done cdcpy'
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if(info /= 0) then
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info=4010
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ch_err='psb_cdcpy'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Early return: P>=3 N_OVR=0'
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endif
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return
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endif
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If (upd == 'F') Then
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!
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! Build the auxiliary descriptor desc_p%matrix_data(psb_n_row_).
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! This is done by psb_cdbldext (interface to psb_cdovr), which is
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! independent of CSR, and has been placed in the tools directory
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! of PSBLAS, instead of the mlprec directory of MLD2P4, because it
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! might be used independently of the AS preconditioner, to build
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! a descriptor for an extended stencil in a PDE solver.
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!
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call psb_cdbldext(a,desc_data,novr,desc_p,info,extype=psb_ovt_asov_)
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if (info /= 0) then
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info=4010
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ch_err='psb_cdbldext'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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Endif
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if(debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& ' From cdbldext _:',desc_p%matrix_data(psb_n_row_),&
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& desc_p%matrix_data(psb_n_col_)
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!
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! Retrieve the remote pieces needed to build the local extended matrix
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!
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n_row = desc_p%matrix_data(psb_n_row_)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Before sphalo ',blk%fida,blk%m,psb_nnz_,blk%infoa(psb_nnz_)
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Call psb_sphalo(a,desc_p,blk,info,&
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& outfmt=outfmt,data=psb_comm_ext_,rowscale=.true.)
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if (info /= 0) then
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info=4010
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ch_err='psb_sphalo'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'After psb_sphalo ',&
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& blk%fida,blk%m,psb_nnz_,blk%infoa(psb_nnz_)
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case default
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if(info /= 0) then
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info=4001
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ch_err='Invalid ptype'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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End select
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),'Done'
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act.eq.psb_act_abort_) then
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call psb_error()
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return
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end if
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Return
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End Subroutine mld_zasmat_bld
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