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235 lines
7.8 KiB
Fortran
235 lines
7.8 KiB
Fortran
!!$
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!!$ Parallel Sparse BLAS v2.0
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!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari 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 PSBLAS 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 PSBLAS 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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subroutine psb_cdrep(m, ictxt, desc_a, info)
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! Purpose
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! =======
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!
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! Allocate special descriptor for replicated index space.
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!
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!
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!
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! INPUT
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!======
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! M :(Global Input) Integer
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! Total number of equations
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! required.
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!
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! ictxt : (Global Input)Integer BLACS context for an NPx1 grid
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! required.
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!
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! OUTPUT
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!=========
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! desc_a : TYPEDESC
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! desc_a OUTPUT FIELDS:
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!
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! MATRIX_DATA : Pointer to integer Array
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! contains some
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! local and global information about matrix:
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!
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! NOTATION STORED IN EXPLANATION
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! ------------ ---------------------- -------------------------------------
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! DEC_TYPE MATRIX_DATA[DEC_TYPE_] Decomposition type, temporarly is
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! setted to 1( matrix not yet assembled)
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! M MATRIX_DATA[M_] Total number of equations
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! N MATRIX_DATA[N_] Total number of variables
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! N_ROW MATRIX_DATA[N_ROW_] Number of local equations
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! N_COL MATRIX_DATA[N_COL_] Number of local columns (see below)
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! CTXT_A MATRIX_DATA[CTXT_] The BLACS context handle,
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! indicating
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! the global context of the operation
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! on the matrix.
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! The context itself is global.
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!
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! GLOB_TO_LOC Array of dimension equal to number of global
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! rows/cols (MATRIX_DATA[M_]). On exit,
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! for all global indices either:
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! 1. The index belongs to the current process; the entry
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! is set to the next free local row index.
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! 2. The index belongs to process P (0<=P<=NP-1); the entry
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! is set to
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! -(NP+P+1)
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!
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! LOC_TO_GLOB An array of dimension equal to number of local cols N_COL
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! i.e. all columns of the matrix such that there is at least
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! one nonzero entry within the local row range. At the time
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! this routine is called N_COL cannot be know, so we set
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! N_COL=N_ROW, and dimension this vector on N_ROW plus an
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! estimate. On exit the vector elements are set
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! to the index of the corresponding entry in GLOB_TO_LOC, or
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! to -1 for indices I>N_ROW.
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!
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!
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! HALO_INDEX Not touched here, as it depends on the matrix pattern
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!
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! OVRLAP_INDEX On exit from this routine, the overlap indices are stored in
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! triples (Proc, 1, Index), similar to the assembled format
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! but neither optimized, nor deadlock free.
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! List is terminated with -1
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!
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! OVRLAP_ELEM On exit from this routine, just a list of pairs (index,#p).
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! List is terminated with -1.
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!
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!
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! END OF desc_a OUTPUT FIELDS
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!
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!
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use psb_descriptor_type
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use psb_serial_mod
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use psb_const_mod
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use psb_error_mod
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use psi_mod
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use psb_penv_mod
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implicit None
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!....Parameters...
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Integer, intent(in) :: m,ictxt
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integer, intent(out) :: info
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Type(psb_desc_type), intent(out) :: desc_a
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!locals
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Integer :: i,np,me,err,n,err_act
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integer :: int_err(5),exch(2), thalo(1), tovr(1), text(1)
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integer :: debug_level, debug_unit
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character(len=20) :: name
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if(psb_get_errstatus() /= 0) return
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info=0
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err=0
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name = 'psb_cdrep'
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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call psb_info(ictxt, me, np)
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if (debug_level >= psb_debug_ext_) &
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& write(debug_unit,*) me,' ',trim(name),': ',np
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n = m
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!... check m and n parameters....
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if (m < 1) then
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info = 10
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int_err(1) = 1
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int_err(2) = m
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else if (n < 1) then
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info = 10
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int_err(1) = 2
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int_err(2) = n
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endif
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if (info /= 0) then
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call psb_errpush(info,name,i_err=int_err)
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goto 9999
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end if
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if (debug_level >= psb_debug_ext_) &
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& write(debug_unit,*) me,' ',trim(name),': doing global checks'
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!global check on m and n parameters
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if (me == psb_root_) then
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exch(1)=m
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exch(2)=n
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call psb_bcast(ictxt,exch(1:2),root=psb_root_)
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else
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call psb_bcast(ictxt,exch(1:2),root=psb_root_)
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if (exch(1) /= m) then
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info=550
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int_err(1)=1
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else if (exch(2) /= n) then
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info=550
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int_err(1)=2
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endif
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endif
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if (info /= 0) then
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call psb_errpush(info,name,i_err=int_err)
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goto 9999
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end if
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call psb_nullify_desc(desc_a)
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!count local rows number
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! allocate work vector
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allocate(desc_a%glob_to_loc(m),desc_a%matrix_data(psb_mdata_size_),&
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& desc_a%loc_to_glob(m),desc_a%lprm(1),stat=info)
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if (info /= 0) then
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info=4025
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int_err(1)=2*m+psb_mdata_size_+1
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call psb_errpush(info,name,i_err=int_err,a_err='integer')
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goto 9999
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endif
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! If the index space is replicated there's no point in not having
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! the full map on the current process.
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desc_a%matrix_data(psb_desc_size_) = psb_desc_normal_
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desc_a%matrix_data(psb_m_) = m
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desc_a%matrix_data(psb_n_) = n
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desc_a%matrix_data(psb_n_row_) = m
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desc_a%matrix_data(psb_n_col_) = n
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desc_a%matrix_data(psb_ctxt_) = ictxt
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call psb_get_mpicomm(ictxt,desc_a%matrix_data(psb_mpi_c_))
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desc_a%matrix_data(psb_dec_type_) = psb_desc_bld_
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do i=1,m
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desc_a%glob_to_loc(i) = i
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desc_a%loc_to_glob(i) = i
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enddo
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tovr = -1
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thalo = -1
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text = -1
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desc_a%lprm(:) = 0
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call psi_cnv_dsc(thalo,tovr,text,desc_a,info)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='psi_cvn_dsc')
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goto 9999
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end if
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desc_a%matrix_data(psb_dec_type_) = psb_desc_repl_
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if (debug_level >= psb_debug_ext_) &
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& write(debug_unit,*) me,' ',trim(name),': end'
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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 == psb_act_abort_) then
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call psb_error(ictxt)
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return
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end if
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return
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end subroutine psb_cdrep
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