! ! 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 psi_i_xtr_loc_dl(ictxt,is_bld,is_upd,desc_str,loc_dl,length_dl,info) ! internal routine ! == = ============= ! ! _____called by psi_crea_halo and psi_crea_ovrlap ______ ! ! purpose ! == = ==== ! process root (pid=0) extracts for each process "k" the ordered list of process ! to which "k" must communicate. this list with its order is extracted from ! desc_str list ! ! ! input ! == = ==== ! desc_data :integer array ! explanation: ! name explanation ! ------------------ ------------------------------------------------------- ! desc_data array of integer that contains some local and global ! information of matrix. ! ! ! now we explain each of the above vectors. ! ! let a be a generic sparse matrix. we denote with matdata_a the matrix_data ! array for matrix a. ! data stored in matrix_data array are: ! ! notation stored in explanation ! --------------- ---------------------- ------------------------------------- ! dec_type matdata_a[psb_dec_type_] decomposition type ! m matdata_a[m_] total number of equations ! n matdata_a[n_] total number of variables ! n_row matdata_a[psb_n_row_] number of local equations ! n_col matdata_a[psb_n_col_] number of local variables ! psb_ctxt_a matdata_a[ctxt_] the blacs context handle, indicating ! the global context of the operation ! on the matrix. ! the context itself is global. ! desc_str integer array ! explanation: ! let desc_str_p be the array desc_str for local process. !! this is composed of variable dimension blocks for each process to ! communicate to. ! each block contain indexes of local halo elements to exchange with other ! process. ! let p be the pointer to the first element of a block in desc_str_p. ! this block is stored in desc_str_p as : ! ! notation stored in explanation ! --------------- --------------------------- ----------------------------------- ! process_id desc_str_p[p+psb_proc_id_] identifier of process which exchange ! data with. ! n_elements_recv desc_str_p[p+n_elem_recv_] number of elements to receive. ! elements_recv desc_str_p[p+elem_recv_+i] indexes of local elements to ! receive. these are stored in the ! array from location p+elem_recv_ to ! location p+elem_recv_+ ! desc_str_p[p+n_elem_recv_]-1. ! if desc_data(psb_dec_type_) == 0 ! then also will be: ! n_elements_send desc_str_p[p+n_elem_send_] number of elements to send. ! elements_send desc_str_p[p+elem_send_+i] indexes of local elements to ! send. these are stored in the ! array from location p+elem_send_ to ! location p+elem_send_+ ! desc_str_p[p+n_elem_send_]-1. ! list is ended by -1 value ! ! np integer (global input) ! number of grid process. ! ! output ! == = == ! loc_dl integer array(:) ! dependence list of current process ! use psi_mod, psb_protect_name => psi_i_xtr_loc_dl #ifdef MPI_MOD use mpi #endif use psb_penv_mod use psb_const_mod use psb_error_mod use psb_desc_mod use psb_sort_mod implicit none #ifdef MPI_H include 'mpif.h' #endif ! ....scalar parameters... logical, intent(in) :: is_bld, is_upd integer(psb_ipk_), intent(in) :: ictxt integer(psb_ipk_), intent(in) :: desc_str(:) integer(psb_ipk_), allocatable, intent(out) :: loc_dl(:), length_dl(:) integer(psb_ipk_), intent(out) :: info ! .....local arrays.... integer(psb_ipk_) :: int_err(5) ! .....local scalars... integer(psb_ipk_) :: i,pdl,proc,j,err_act, ldu integer(psb_ipk_) :: err integer(psb_ipk_) :: debug_level, debug_unit integer(psb_mpk_) :: iictxt, icomm, me, np, minfo logical, parameter :: dist_symm_list=.true., print_dl=.false., profile=.true. character name*20 name='psi_extrct_dl' call psb_erractionsave(err_act) debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() iictxt = ictxt info = psb_success_ call psb_info(iictxt,me,np) pdl = size(desc_str) allocate(loc_dl(pdl+1),length_dl(0:np),stat=info) if (info /= psb_success_) then info=psb_err_alloc_dealloc_ goto 9999 end if if (debug_level >= psb_debug_inner_)& & write(debug_unit,*) me,' ',trim(name),': start ',info loc_dl = -1 i = 1 pdl = 0 if (is_bld) then do while (desc_str(i) /= -1) if (debug_level >= psb_debug_inner_)& & write(debug_unit,*) me,' ',trim(name),' : looping ',i,& & desc_str(i),desc_str(i+1),desc_str(i+2) ! ...with different decomposition type we have different ! structure of indices lists............................ if ((desc_str(i+1) /= 0).or.(desc_str(i+2) /= 0)) then ! ..if number of element to be exchanged !=0 proc=desc_str(i) if ((proc < 0).or.(proc >= np)) then if (debug_level >= psb_debug_inner_)& & write(debug_unit,*) me,' ',trim(name),': error ',i,desc_str(i) info = 9999 int_err(1) = i int_err(2) = desc_str(i) goto 9999 endif ! if((me == 1).and.(proc == 3))write(psb_err_unit,*)'found 3' pdl=pdl+1 loc_dl(pdl)=proc endif i=i+desc_str(i+1)+2 enddo else if (is_upd) then do while (desc_str(i) /= -1) if (debug_level >= psb_debug_inner_) & & write(debug_unit,*) me,' ',trim(name),': looping ',i,desc_str(i) ! ...with different decomposition type we have different ! structure of indices lists............................ if (desc_str(i+1) /= 0) then proc=desc_str(i) ! ..if number of element to be exchanged !=0 pdl=pdl+1 loc_dl(pdl)=proc endif i=i+desc_str(i+1)+2 enddo else info = 2020 goto 9999 endif call psb_msort_unique(loc_dl(1:pdl),ldu) pdl = ldu call psb_realloc(pdl,loc_dl,info) call psi_symm_dep_list(loc_dl,ictxt,info) pdl = size(loc_dl) length_dl = 0 length_dl(me) = pdl call psb_sum(ictxt,length_dl) call psb_erractionrestore(err_act) return 9999 continue call psb_errpush(info,name,i_err=int_err) call psb_error_handler(err_act) return end subroutine psi_i_xtr_loc_dl