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psblas3/base/tools/psb_cdalv.f90

228 lines
6.6 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! 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.
! ctxt - 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, ctxt, 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...
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_), intent(in) :: 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,j,np,me,loc_row,err,&
& loc_col,nprocs,itmpov, k,glx,&
& l_ov_ix,l_ov_el,idx, flag_, err_act
integer(psb_lpk_) :: m,n,i,exch(3)
integer(psb_lpk_) :: l_err(5)
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(ctxt, 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_
l_err(1) = 1
l_err(2) = m
else if (n < 1) then
info = psb_err_iarg_neg_
l_err(1) = 2
l_err(2) = n
else if (size(v)<m) then
info = psb_err_iarg_neg_
l_err(1) = 2
l_err(2) = size(v)
endif
if (info /= psb_success_) then
call psb_errpush(info,name,l_err=l_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(ctxt,exch(1:3),root=psb_root_)
else
call psb_bcast(ctxt,exch(1:3),root=psb_root_)
if (exch(1) /= m) then
err=550
l_err(1)=1
call psb_errpush(err,name,l_err=l_err)
goto 9999
else if (exch(2) /= n) then
err=550
l_err(1)=2
call psb_errpush(err,name,l_err=l_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
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_
l_err(1)=2*m+psb_mdata_size_
call psb_errpush(info,name,l_err=l_err,a_err='integer')
goto 9999
endif
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': starting main loop' ,info
counter = 0
itmpov = 0
temp_ovrlap(:) = -1
!$omp parallel do private(i) reduction(+:counter)
do i=1,m
if (((v(i)-flag_) > np-1).or.((v(i)-flag_) < 0)) then
info=psb_err_partfunc_wrong_pid_
l_err(1)=3
l_err(2)=v(i) - flag_
l_err(3)=i
!exit
end if
if ((v(i)-flag_) == me) then
! this point belongs to me
counter=counter+1
end if
enddo
if (info /= psb_success_) then
call psb_errpush(info,name,l_err=l_err)
goto 9999
endif
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(ctxt,m)) then
allocate(psb_hash_map :: desc%indxmap, stat=info)
if (info == 0) allocate(desc%indxmap%tempvg(m),stat=info)
if (info ==0) desc%indxmap%tempvg(1:m) = v(1:m) - flag_
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(ctxt,m,info)
type is (psb_hash_map)
call aa%hash_map_init(ctxt,v,info)
type is (psb_glist_map)
call aa%glist_map_init(ctxt,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
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': end'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ctxt,err_act)
return
end subroutine psb_cdalv