New RENUM_BLOCK method.
Salvatore Filippone
6 years ago
parent
99b23f26c1
commit
2ce1d94580
@ -0,0 +1,152 @@
|
||||
!
|
||||
! 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.
|
||||
!
|
||||
!
|
||||
!
|
||||
! Subroutine: psb_cd_renum_block
|
||||
! Produces a clone of a descriptor.
|
||||
!
|
||||
! Arguments:
|
||||
! desc_in - type(psb_desc_type). The communication descriptor to be cloned.
|
||||
! desc_out - type(psb_desc_type). The output communication descriptor.
|
||||
! info - integer. Return code.
|
||||
subroutine psb_cd_renum_block(desc_in, desc_out, info)
|
||||
|
||||
use psb_base_mod, psb_protect_name => psb_cd_renum_block
|
||||
|
||||
implicit none
|
||||
!....parameters...
|
||||
|
||||
type(psb_desc_type), intent(inout) :: desc_in
|
||||
type(psb_desc_type), intent(out) :: desc_out
|
||||
integer(psb_ipk_), intent(out) :: info
|
||||
|
||||
!locals
|
||||
type(psb_gen_block_map), allocatable :: blck_map
|
||||
integer(psb_ipk_), allocatable :: lidx(:),reflidx(:)
|
||||
integer(psb_lpk_), allocatable :: gidx(:),vnl(:)
|
||||
integer(psb_ipk_) :: i,n_row, n_col
|
||||
integer(psb_lpk_) :: li,n_glob_row, n_glob_col
|
||||
integer(psb_ipk_) :: np,me,ictxt, err_act
|
||||
integer(psb_ipk_) :: debug_level, debug_unit
|
||||
character(len=20) :: name
|
||||
|
||||
debug_unit = psb_get_debug_unit()
|
||||
debug_level = psb_get_debug_level()
|
||||
|
||||
if (psb_get_errstatus() /= 0) return
|
||||
info = psb_success_
|
||||
call psb_erractionsave(err_act)
|
||||
name = 'psb_cd_renum_block'
|
||||
|
||||
ictxt = desc_in%get_context()
|
||||
|
||||
! check on blacs grid
|
||||
call psb_info(ictxt, me, np)
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),': Entered'
|
||||
if (np == -1) then
|
||||
info = psb_err_context_error_
|
||||
call psb_errpush(info,name)
|
||||
goto 9999
|
||||
endif
|
||||
|
||||
call desc_in%clone(desc_out,info)
|
||||
if (desc_in%is_ovl()) then
|
||||
write(0,*) 'Warning: descriptor with overlap, not going to clone into BLOCK'
|
||||
else
|
||||
!
|
||||
! Ok, convert into a GEN BLOCK.
|
||||
!
|
||||
allocate(psb_gen_block_map :: blck_map, stat=info)
|
||||
if (info == 0) allocate(vnl(0:np),stat=info)
|
||||
if (info /= 0) then
|
||||
info = psb_err_alloc_dealloc_
|
||||
call psb_errpush(info,name)
|
||||
goto 9999
|
||||
endif
|
||||
n_row = desc_in%get_local_rows()
|
||||
n_col = desc_in%get_local_cols()
|
||||
n_glob_row = desc_in%get_global_rows()
|
||||
n_glob_col = desc_in%get_global_cols()
|
||||
vnl = 0
|
||||
vnl(me) = n_row
|
||||
call psb_sum(ictxt,vnl)
|
||||
vnl(1:np) = vnl(0:np-1)
|
||||
vnl(0) = 0
|
||||
do i=1,np
|
||||
vnl(i) = vnl(i-1)+vnl(i)
|
||||
end do
|
||||
allocate(lidx(n_col),reflidx(n_col),gidx(n_col),stat=info)
|
||||
if (info /= 0) then
|
||||
info = psb_err_alloc_dealloc_
|
||||
call psb_errpush(info,name)
|
||||
goto 9999
|
||||
endif
|
||||
!
|
||||
! A GEN_BLOCK distribution would just assign indices 1:N_R0
|
||||
! to process 0, N_R0+1:N_R0+N_R1 to process 1 and so on;
|
||||
! once these are set you can get the others by invoking
|
||||
! HALO on the old descriptor, then put the map into the new
|
||||
! one. Halo lists are stored in local indices, so they will
|
||||
! continue to work since local indices stay the same, it's
|
||||
! only the global indices that were reshuffled.
|
||||
!
|
||||
reflidx(1:n_col) = [(i,i=1,n_col)]
|
||||
gidx(1:n_row) = reflidx(1:n_row) + vnl(me)
|
||||
call psb_halo(gidx,desc_in,info)
|
||||
if (info == 0) call blck_map%gen_block_map_init(ictxt,n_row,info)
|
||||
if (info == 0) call blck_map%g2l_ins(gidx,lidx,info,lidx=reflidx)
|
||||
if (info == 0) call blck_map%asb(info)
|
||||
|
||||
if (info /= psb_success_) then
|
||||
info = psb_err_from_subroutine_
|
||||
call psb_errpush(info,name)
|
||||
goto 9999
|
||||
endif
|
||||
call move_alloc(blck_map,desc_out%indxmap)
|
||||
end if
|
||||
|
||||
if (info /= psb_success_) then
|
||||
info = psb_err_from_subroutine_
|
||||
call psb_errpush(info,name)
|
||||
goto 9999
|
||||
endif
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),': Done'
|
||||
|
||||
call psb_erractionrestore(err_act)
|
||||
return
|
||||
|
||||
9999 call psb_error_handler(ictxt,err_act)
|
||||
|
||||
return
|
||||
|
||||
end subroutine psb_cd_renum_block
|
||||
Loading…
Reference in New Issue