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psblas3/base/tools/psb_cdrep.f90

223 lines
7.9 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.4
!!$ (C) Copyright 2006, 2010, 2015
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
!!$ Redistribution and use in source and binary forms, with or without
!!$ modification, are permitted provided that the following conditions
!!$ are met:
!!$ 1. Redistributions of source code must retain the above copyright
!!$ notice, this list of conditions and the following disclaimer.
!!$ 2. Redistributions in binary form must reproduce the above copyright
!!$ notice, this list of conditions, and the following disclaimer in the
!!$ documentation and/or other materials provided with the distribution.
!!$ 3. The name of the PSBLAS group or the names of its contributors may
!!$ not be used to endorse or promote products derived from this
!!$ software without specific written permission.
!!$
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
!!$ POSSIBILITY OF SUCH DAMAGE.
!!$
!!$
! Purpose
! == = ====
!
! Allocate special descriptor for replicated index space.
!
!
!
! INPUT
! == ====
! M :(Global Input) Integer
! Total number of equations
! required.
!
! ictxt : (Global Input)Integer BLACS context for an NPx1 grid
! required.
!
! OUTPUT
! == =======
! desc : TYPEDESC
! desc OUTPUT FIELDS:
!
! MATRIX_DATA : Pointer to integer Array
! contains some
! local and global information about matrix:
!
! NOTATION STORED IN EXPLANATION
! ------------ ---------------------- -------------------------------------
! DEC_TYPE MATRIX_DATA[DEC_TYPE_] Decomposition type, temporarly is
! setted to 1( matrix not yet assembled)
! M MATRIX_DATA[M_] Total number of equations
! N MATRIX_DATA[N_] Total number of variables
! N_ROW MATRIX_DATA[N_ROW_] Number of local equations
! N_COL MATRIX_DATA[N_COL_] Number of local columns (see below)
! CTXT_A MATRIX_DATA[CTXT_] The BLACS context handle,
! indicating
! the global context of the operation
! on the matrix.
! The context itself is global.
!
! GLOB_TO_LOC Array of dimension equal to number of global
! rows/cols (MATRIX_DATA[M_]). On exit,
! for all global indices either:
! 1. The index belongs to the current process; the entry
! is set to the next free local row index.
! 2. The index belongs to process P (0<=P<=NP-1); the entry
! is set to
! -(NP+P+1)
!
! LOC_TO_GLOB An array of dimension equal to number of local cols N_COL
! i.e. all columns of the matrix such that there is at least
! one nonzero entry within the local row range. At the time
! this routine is called N_COL cannot be know, so we set
! N_COL=N_ROW, and dimension this vector on N_ROW plus an
! estimate. On exit the vector elements are set
! to the index of the corresponding entry in GLOB_TO_LOC, or
! to -1 for indices I>N_ROW.
!
!
! HALO_INDEX Not touched here, as it depends on the matrix pattern
!
! OVRLAP_INDEX On exit from this routine, the overlap indices are stored in
! triples (Proc, 1, Index), similar to the assembled format
! but neither optimized, nor deadlock free.
! List is terminated with -1
!
! OVRLAP_ELEM On exit from this routine, just a list of pairs (index,#p).
! List is terminated with -1.
!
!
! END OF desc OUTPUT FIELDS
!
!
subroutine psb_cdrep(m, ictxt, desc, info)
use psb_base_mod
use psi_mod
use psb_repl_map_mod
implicit None
!....Parameters...
integer(psb_ipk_), intent(in) :: m,ictxt
integer(psb_ipk_), intent(out) :: info
Type(psb_desc_type), intent(out) :: desc
!locals
integer(psb_ipk_) :: i,np,me,err,n,err_act
integer(psb_ipk_) :: int_err(5),exch(2), thalo(1), tovr(1), text(1)
integer(psb_ipk_) :: debug_level, debug_unit
integer(psb_mpik_) :: iictxt
character(len=20) :: name
if(psb_get_errstatus() /= 0) return
info=psb_success_
err=0
name = 'psb_cdrep'
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
call psb_info(ictxt, me, np)
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': ',np
iictxt = ictxt
n = m
!... check m and n parameters....
if (m < 1) then
info = psb_err_iarg_neg_
int_err(1) = 1
int_err(2) = m
else if (n < 1) then
info = psb_err_iarg_neg_
int_err(1) = 2
int_err(2) = n
endif
if (info /= psb_success_) then
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': doing global checks'
!global check on m and n parameters
if (me == psb_root_) then
exch(1)=m
exch(2)=n
call psb_bcast(ictxt,exch(1:2),root=psb_root_)
else
call psb_bcast(ictxt,exch(1:2),root=psb_root_)
if (exch(1) /= m) then
info=psb_err_parm_differs_among_procs_
int_err(1)=1
else if (exch(2) /= n) then
info=psb_err_parm_differs_among_procs_
int_err(1)=2
endif
endif
if (info /= psb_success_) then
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
call psb_nullify_desc(desc)
!count local rows number
! allocate work vector
!!$ allocate(desc%matrix_data(psb_mdata_size_),&
!!$ & desc%ovrlap_elem(0,3),stat=info)
!!$ if (info /= psb_success_) then
!!$ info=psb_err_alloc_request_
!!$ int_err(1)=2*m+psb_mdata_size_+1
!!$ call psb_errpush(info,name,i_err=int_err,a_err='integer')
!!$ goto 9999
!!$ endif
!!$ ! If the index space is replicated there's no point in not having
!!$ ! the full map on the current process.
!!$
!!$ desc%matrix_data(psb_m_) = m
!!$ desc%matrix_data(psb_n_) = n
!!$ desc%matrix_data(psb_n_row_) = m
!!$ desc%matrix_data(psb_n_col_) = n
!!$ desc%matrix_data(psb_ctxt_) = ictxt
!!$ call psb_get_mpicomm(ictxt,desc%matrix_data(psb_mpi_c_))
!!$ desc%matrix_data(psb_dec_type_) = psb_desc_bld_
allocate(psb_repl_map :: desc%indxmap, stat=info)
select type(aa => desc%indxmap)
type is (psb_repl_map)
call aa%repl_map_init(iictxt,m,info)
class default
! This cannot happen
info = psb_err_internal_error_
call psb_errpush(info,name)
Goto 9999
end select
tovr = -1
call psi_bld_tmpovrl(tovr,desc,info)
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': end'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end subroutine psb_cdrep