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psblas3/base/tools/psb_cdals.f90

295 lines
9.5 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_cdals.f90
!
! Subroutine: psb_cdals
! Allocate descriptor
! and checks correctness of PARTS subroutine
!
! Arguments:
! m - integer. The number of rows.
! n - integer. The number of columns.
! parts - external subroutine. The routine that contains the
! partitioning scheme.
! ictxt - integer. The communication context.
! desc - type(psb_desc_type). The communication descriptor.
! info - integer. Error code (if any).
subroutine psb_cdals(m, n, parts, ictxt, desc, info)
use psb_base_mod
use psi_mod
use psb_repl_map_mod
use psb_list_map_mod
use psb_hash_map_mod
implicit None
procedure(psb_parts) :: parts
!....Parameters...
integer(psb_lpk_), intent(in) :: M,N
integer(psb_ipk_), intent(in) :: ictxt
Type(psb_desc_type), intent(out) :: desc
integer(psb_ipk_), intent(out) :: info
!locals
integer(psb_ipk_) :: counter,i,j,loc_row,err,loc_col,&
& l_ov_ix,l_ov_el,idx, err_act, itmpov, k, glx, nlx
integer(psb_lpk_) :: iglob
integer(psb_ipk_) :: exch(3)
integer(psb_ipk_), allocatable :: temp_ovrlap(:)
integer(psb_lpk_), allocatable :: l_temp_ovrlap(:), loc_idx(:)
integer(psb_ipk_), allocatable :: prc_v(:)
integer(psb_ipk_) :: debug_level, debug_unit
integer(psb_ipk_) :: me, np, nprocs
integer(psb_mpk_) :: iictxt
character(len=20) :: name
if(psb_get_errstatus() /= 0) return
info=psb_success_
err=0
name = 'psb_cdall'
call psb_erractionsave(err_act)
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
! ....verify blacs grid correctness..
!... check m and n parameters....
if (m < 1) then
info = psb_err_iarg_neg_
err=info
call psb_errpush(err,name,l_err=(/lone,m/))
goto 9999
else if (n < 1) then
info = psb_err_iarg_neg_
err=info
call psb_errpush(err,name,l_err=(/lone*2,n/))
goto 9999
endif
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; 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
call psb_errpush(err,name,m_err=(/1/))
goto 9999
else if (exch(2) /= n) then
err=550
call psb_errpush(err,name,m_err=(/2/))
goto 9999
endif
call psb_cd_set_large_threshold(exch(3))
endif
call psb_nullify_desc(desc)
! count local rows number
loc_row = max(1,(m+np-1)/np)
! allocate work vector
allocate(l_temp_ovrlap(max(1,2*loc_row)), prc_v(np),stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_request_
err=info
call psb_errpush(err,name,a_err='integer',l_err=(/2*m+psb_mdata_size_+np/))
goto 9999
endif
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': starting main loop' ,info
counter = 0
itmpov = 0
l_temp_ovrlap(:) = -1
!
! We have to decide whether we have a "large" index space.
!
!
! Yes, we do have a large index space. Therefore we are
! keeping on the local process a map of only the global
! indices ending up here; this map is stored partly in
! a hash of sorted lists, part in a hash table.
! At assembly time
! is transferred to a series of ordered linear lists,
! hashed by the low order bits of the entries.
!
loc_col = max(1,(m+np-1)/np)
loc_col = min(2*loc_col,m)
allocate(desc%lprm(1), loc_idx(loc_col), stat=info)
if (info == psb_success_) then
if (np == 1) then
allocate(psb_repl_map :: desc%indxmap, stat=info)
else
allocate(psb_hash_map :: desc%indxmap, stat=info)
desc%indxmap%parts => parts
end if
end if
if (info /= psb_success_) then
info=psb_err_alloc_request_
call psb_errpush(info,name,i_err=(/loc_col/),a_err='integer')
goto 9999
end if
! set LOC_TO_GLOB array to all "-1" values
desc%lprm(1) = 0
k = 0
do iglob=1,m
if (info == psb_success_) then
call parts(iglob,m,np,prc_v,nprocs)
if (nprocs > np) then
info=psb_err_partfunc_toomuchprocs_
call psb_errpush(info,name,l_err=(/3_psb_lpk_,np*lone,nprocs*lone,iglob/))
goto 9999
else if (nprocs <= 0) then
info=psb_err_partfunc_toofewprocs_
call psb_errpush(info,name,l_err=(/3_psb_lpk_,nprocs*lone,iglob/))
goto 9999
else
do j=1,nprocs
if ((prc_v(j) > np-1).or.(prc_v(j) < 0)) then
info=psb_err_partfunc_wrong_pid_
call psb_errpush(info,name,l_err=(/3_psb_lpk_,prc_v(j)*lone,iglob/))
goto 9999
end if
end do
endif
j=1
do
if (j > nprocs) exit
if (prc_v(j) == me) exit
j=j+1
enddo
if (j <= nprocs) then
if (prc_v(j) == me) then
! this point belongs to me
k = k + 1
call psb_ensure_size((k+1),loc_idx,info,pad=-1_psb_lpk_)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
loc_idx(k) = iglob
if (nprocs > 1) then
call psb_ensure_size((itmpov+3+nprocs),l_temp_ovrlap,info,pad=-1_psb_lpk_)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
itmpov = itmpov + 1
l_temp_ovrlap(itmpov) = iglob
itmpov = itmpov + 1
l_temp_ovrlap(itmpov) = nprocs
l_temp_ovrlap(itmpov+1:itmpov+nprocs) = prc_v(1:nprocs)
itmpov = itmpov + nprocs
endif
end if
end if
end if
enddo
if (info /= psb_success_) then
info=psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
endif
loc_row = k
! check on parts function
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': End main loop:' ,loc_row,itmpov,info
iictxt = ictxt
select type(aa => desc%indxmap)
type is (psb_repl_map)
call aa%repl_map_init(iictxt,m,info)
class default
call aa%init(iictxt,loc_idx(1:k),info)
end select
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': error check:' ,err
!
! Now that we have initialized indxmap we can convert the
! indices to local numbering.
!
block
integer(psb_ipk_) :: i,nprocs
allocate(temp_ovrlap(size(l_temp_ovrlap)),stat=info)
if (info == psb_success_) then
temp_ovrlap = -1
i = 1
do while (l_temp_ovrlap(i) /= -1)
call desc%indxmap%g2l(l_temp_ovrlap(i),temp_ovrlap(i),info)
i = i + 1
temp_ovrlap(i) = l_temp_ovrlap(i)
nprocs = temp_ovrlap(i)
temp_ovrlap(i+1:i+nprocs) = l_temp_ovrlap(i+1:i+nprocs)
i = i + 1
i = i + nprocs
enddo
end if
end block
if (info == psb_success_) call psi_bld_tmpovrl(temp_ovrlap,desc,info)
if (info == psb_success_) deallocate(prc_v,temp_ovrlap,stat=info)
if (info /= psb_no_err_) then
info=psb_err_alloc_dealloc_
err=info
call psb_errpush(err,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(ictxt,err_act)
return
end subroutine psb_cdals