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psblas3/base/tools/psb_cdalv.f90

233 lines
6.9 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.0
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010
!!$ 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.
!!$
!!$
! File: psb_cdalv.f90
!
! Subroutine: psb_cdalv
! Allocate descriptor by means of a global map vector V: index I
! is assigned to process V(I). It is assumed that V is identical
! on all calling processes.
!
!
! Arguments:
! v - integer(psb_ipk_), dimension(:). The array containg the partitioning scheme.
! ictxt - integer. The communication context.
! desc - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
! flag - integer. Are V's contents 0- or 1-based?
subroutine psb_cdalv(v, ictxt, desc, info, flag)
use psb_base_mod
use psi_mod
use psb_repl_map_mod
use psb_glist_map_mod
use psb_hash_map_mod
implicit None
!....Parameters...
integer(psb_ipk_), intent(in) :: ictxt, v(:)
integer(psb_ipk_), intent(in), optional :: flag
integer(psb_ipk_), intent(out) :: info
type(psb_desc_type), intent(out) :: desc
!locals
integer(psb_ipk_) :: counter,i,j,np,me,loc_row,err,&
& loc_col,nprocs,m,n,itmpov, k,glx,&
& l_ov_ix,l_ov_el,idx, flag_, err_act
integer(psb_ipk_) :: int_err(5),exch(3)
integer(psb_ipk_), allocatable :: temp_ovrlap(:)
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name
if(psb_get_errstatus() /= 0) return
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
info = psb_success_
err = 0
name = 'psb_cdalv'
call psb_info(ictxt, me, np)
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': ',np,me
m = size(v)
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
else if (size(v)<m) then
info = psb_err_iarg_neg_
int_err(1) = 2
int_err(2) = size(v)
endif
if (info /= psb_success_) then
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
if (me == psb_root_) then
exch(1)=m
exch(2)=n
exch(3)=psb_cd_get_large_threshold()
call psb_bcast(ictxt,exch(1:3),root=psb_root_)
else
call psb_bcast(ictxt,exch(1:3),root=psb_root_)
if (exch(1) /= m) then
err=550
int_err(1)=1
call psb_errpush(err,name,int_err)
goto 9999
else if (exch(2) /= n) then
err=550
int_err(1)=2
call psb_errpush(err,name,int_err)
goto 9999
endif
call psb_cd_set_large_threshold(exch(3))
endif
call psb_nullify_desc(desc)
if (present(flag)) then
flag_=flag
else
flag_=0
endif
if ((flag_<0).or.(flag_>1)) then
info = 6
err=info
call psb_errpush(info,name)
goto 9999
end if
! count local rows number
loc_row = max(1,(m+np-1)/np)
! allocate work vector
allocate(temp_ovrlap(2),stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_request_
int_err(1)=2*m+psb_mdata_size_
call psb_errpush(info,name,i_err=int_err,a_err='integer')
goto 9999
endif
!!$ desc%matrix_data(psb_m_) = m
!!$ desc%matrix_data(psb_n_) = n
!!$ ! This has to be set BEFORE any call to SET_BLD
!!$ desc%matrix_data(psb_ctxt_) = ictxt
!!$ call psb_get_mpicomm(ictxt,desc%matrix_data(psb_mpi_c_))
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': starting main loop' ,info
counter = 0
itmpov = 0
temp_ovrlap(:) = -1
do i=1,m
if (((v(i)-flag_) > np-1).or.((v(i)-flag_) < 0)) then
info=psb_err_partfunc_wrong_pid_
int_err(1)=3
int_err(2)=v(i) - flag_
int_err(3)=i
exit
end if
if ((v(i)-flag_) == me) then
! this point belongs to me
counter=counter+1
end if
enddo
loc_row=counter
!
! We have to decide whether we have a "large" index space.
!
if (np == 1) then
allocate(psb_repl_map :: desc%indxmap, stat=info)
else
if (psb_cd_choose_large_state(ictxt,m)) then
allocate(psb_hash_map :: desc%indxmap, stat=info)
else
allocate(psb_glist_map :: desc%indxmap, stat=info)
end if
end if
select type(aa => desc%indxmap)
type is (psb_repl_map)
call aa%repl_map_init(ictxt,m,info)
type is (psb_hash_map)
call aa%hash_map_init(ictxt,v,info)
type is (psb_glist_map)
call aa%glist_map_init(ictxt,v,info)
class default
! This cannot happen
info = psb_err_internal_error_
call psb_errpush(info,name)
Goto 9999
end select
call psi_bld_tmpovrl(temp_ovrlap,desc,info)
deallocate(temp_ovrlap,stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
endif
!!$ ! set fields in desc%MATRIX_DATA....
!!$ desc%matrix_data(psb_n_row_) = loc_row
!!$ desc%matrix_data(psb_n_col_) = loc_row
!!$
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': end'
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error(ictxt)
return
end if
return
end subroutine psb_cdalv