From dcd9e2f8d9aa630726b11c7a1cd9fa6d9a3509e8 Mon Sep 17 00:00:00 2001 From: Salvatore Filippone Date: Wed, 25 Oct 2017 16:15:47 +0100 Subject: [PATCH] Put back matgen code inside example. --- test/serial/d_matgen.F90 | 355 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 355 insertions(+) diff --git a/test/serial/d_matgen.F90 b/test/serial/d_matgen.F90 index 62f7403a..31f7f882 100644 --- a/test/serial/d_matgen.F90 +++ b/test/serial/d_matgen.F90 @@ -1,7 +1,362 @@ ! +module psb_d_pde3d_mod + + + use psb_base_mod, only : psb_dpk_, psb_ipk_, psb_desc_type,& + & psb_dspmat_type, psb_d_vect_type, dzero,& + & psb_d_base_sparse_mat, psb_d_base_vect_type, psb_i_base_vect_type + + interface + function d_func_3d(x,y,z) result(val) + import :: psb_dpk_ + real(psb_dpk_), intent(in) :: x,y,z + real(psb_dpk_) :: val + end function d_func_3d + end interface + + interface psb_gen_pde3d + module procedure psb_d_gen_pde3d + end interface psb_gen_pde3d + + +contains + + function d_null_func_3d(x,y,z) result(val) + + real(psb_dpk_), intent(in) :: x,y,z + real(psb_dpk_) :: val + + val = dzero + + end function d_null_func_3d + + ! + ! subroutine to allocate and fill in the coefficient matrix and + ! the rhs. + ! + subroutine psb_d_gen_pde3d(ictxt,idim,a,bv,xv,desc_a,afmt,& + & a1,a2,a3,b1,b2,b3,c,g,info,f,amold,vmold,imold,nrl,iv) + use psb_base_mod + ! + ! Discretizes the partial differential equation + ! + ! a1 dd(u) a2 dd(u) a3 dd(u) b1 d(u) b2 d(u) b3 d(u) + ! - ------ - ------ - ------ + ----- + ------ + ------ + c u = f + ! dxdx dydy dzdz dx dy dz + ! + ! with Dirichlet boundary conditions + ! u = g + ! + ! on the unit cube 0<=x,y,z<=1. + ! + ! + ! Note that if b1=b2=b3=c=0., the PDE is the Laplace equation. + ! + implicit none + procedure(d_func_3d) :: b1,b2,b3,c,a1,a2,a3,g + integer(psb_ipk_) :: idim + type(psb_dspmat_type) :: a + type(psb_d_vect_type) :: xv,bv + type(psb_desc_type) :: desc_a + integer(psb_ipk_) :: ictxt, info + character(len=*) :: afmt + procedure(d_func_3d), optional :: f + class(psb_d_base_sparse_mat), optional :: amold + class(psb_d_base_vect_type), optional :: vmold + class(psb_i_base_vect_type), optional :: imold + integer(psb_ipk_), optional :: nrl,iv(:) + + ! Local variables. + + integer(psb_ipk_), parameter :: nb=20 + type(psb_d_csc_sparse_mat) :: acsc + type(psb_d_coo_sparse_mat) :: acoo + type(psb_d_csr_sparse_mat) :: acsr + real(psb_dpk_) :: zt(nb),x,y,z + integer(psb_ipk_) :: m,n,nnz,glob_row,nlr,i,ii,ib,k + integer(psb_ipk_) :: ix,iy,iz,ia,indx_owner + integer(psb_ipk_) :: np, iam, nr, nt + integer(psb_ipk_) :: icoeff + integer(psb_ipk_), allocatable :: irow(:),icol(:),myidx(:) + real(psb_dpk_), allocatable :: val(:) + ! deltah dimension of each grid cell + ! deltat discretization time + real(psb_dpk_) :: deltah, sqdeltah, deltah2 + real(psb_dpk_), parameter :: rhs=0.d0,one=1.d0,zero=0.d0 + real(psb_dpk_) :: t0, t1, t2, t3, tasb, talc, ttot, tgen, tcdasb + integer(psb_ipk_) :: err_act + procedure(d_func_3d), pointer :: f_ + character(len=20) :: name, ch_err,tmpfmt + + info = psb_success_ + name = 'create_matrix' + call psb_erractionsave(err_act) + + call psb_info(ictxt, iam, np) + + + if (present(f)) then + f_ => f + else + f_ => d_null_func_3d + end if + + deltah = 1.d0/(idim+2) + sqdeltah = deltah*deltah + deltah2 = 2.d0* deltah + + ! initialize array descriptor and sparse matrix storage. provide an + ! estimate of the number of non zeroes + + m = idim*idim*idim + n = m + nnz = ((n*9)/(np)) + if(iam == psb_root_) write(psb_out_unit,'("Generating Matrix (size=",i0,")...")')n + + if (.not.present(iv)) then + if (present(nrl)) then + nr = nrl + else + ! + ! Using a simple BLOCK distribution. + ! + nt = (m+np-1)/np + nr = max(0,min(nt,m-(iam*nt))) + end if + + nt = nr + call psb_sum(ictxt,nt) + if (nt /= m) then + write(psb_err_unit,*) iam, 'Initialization error ',nr,nt,m + info = -1 + call psb_barrier(ictxt) + call psb_abort(ictxt) + return + end if + else + if (size(iv) /= m) then + write(psb_err_unit,*) iam, 'Initialization error IV',size(iv),m + info = -1 + call psb_barrier(ictxt) + call psb_abort(ictxt) + return + end if + + end if + call psb_barrier(ictxt) + t0 = psb_wtime() + if (present(iv)) then + call psb_cdall(ictxt,desc_a,info,vg=iv) + else + call psb_cdall(ictxt,desc_a,info,nl=nr) + end if + + if (info == psb_success_) call psb_spall(a,desc_a,info,nnz=nnz) + ! define rhs from boundary conditions; also build initial guess + if (info == psb_success_) call psb_geall(xv,desc_a,info) + if (info == psb_success_) call psb_geall(bv,desc_a,info) + + call psb_barrier(ictxt) + talc = psb_wtime()-t0 + + if (info /= psb_success_) then + info=psb_err_from_subroutine_ + ch_err='allocation rout.' + call psb_errpush(info,name,a_err=ch_err) + goto 9999 + end if + + ! we build an auxiliary matrix consisting of one row at a + ! time; just a small matrix. might be extended to generate + ! a bunch of rows per call. + ! + allocate(val(20*nb),irow(20*nb),& + &icol(20*nb),stat=info) + if (info /= psb_success_ ) then + info=psb_err_alloc_dealloc_ + call psb_errpush(info,name) + goto 9999 + endif + + myidx = desc_a%get_global_indices() + nlr = size(myidx) + + ! loop over rows belonging to current process in a block + ! distribution. + + call psb_barrier(ictxt) + t1 = psb_wtime() + do ii=1, nlr,nb + ib = min(nb,nlr-ii+1) + icoeff = 1 + do k=1,ib + i=ii+k-1 + ! local matrix pointer + glob_row=myidx(i) + ! compute gridpoint coordinates + if (mod(glob_row,(idim*idim)) == 0) then + ix = glob_row/(idim*idim) + else + ix = glob_row/(idim*idim)+1 + endif + if (mod((glob_row-(ix-1)*idim*idim),idim) == 0) then + iy = (glob_row-(ix-1)*idim*idim)/idim + else + iy = (glob_row-(ix-1)*idim*idim)/idim+1 + endif + iz = glob_row-(ix-1)*idim*idim-(iy-1)*idim + ! x, y, x coordinates + x = (ix-1)*deltah + y = (iy-1)*deltah + z = (iz-1)*deltah + zt(k) = f_(x,y,z) + ! internal point: build discretization + ! + ! term depending on (x-1,y,z) + ! + val(icoeff) = -a1(x,y,z)/sqdeltah-b1(x,y,z)/deltah2 + if (ix == 1) then + zt(k) = g(dzero,y,z)*(-val(icoeff)) + zt(k) + else + icol(icoeff) = (ix-2)*idim*idim+(iy-1)*idim+(iz) + irow(icoeff) = glob_row + icoeff = icoeff+1 + endif + ! term depending on (x,y-1,z) + val(icoeff) = -a2(x,y,z)/sqdeltah-b2(x,y,z)/deltah2 + if (iy == 1) then + zt(k) = g(x,dzero,z)*(-val(icoeff)) + zt(k) + else + icol(icoeff) = (ix-1)*idim*idim+(iy-2)*idim+(iz) + irow(icoeff) = glob_row + icoeff = icoeff+1 + endif + ! term depending on (x,y,z-1) + val(icoeff)=-a3(x,y,z)/sqdeltah-b3(x,y,z)/deltah2 + if (iz == 1) then + zt(k) = g(x,y,dzero)*(-val(icoeff)) + zt(k) + else + icol(icoeff) = (ix-1)*idim*idim+(iy-1)*idim+(iz-1) + irow(icoeff) = glob_row + icoeff = icoeff+1 + endif + + ! term depending on (x,y,z) + val(icoeff)=2.d0*(a1(x,y,z)+a2(x,y,z)+a3(x,y,z))/sqdeltah & + & + c(x,y,z) + icol(icoeff) = (ix-1)*idim*idim+(iy-1)*idim+(iz) + irow(icoeff) = glob_row + icoeff = icoeff+1 + ! term depending on (x,y,z+1) + val(icoeff)=-a3(x,y,z)/sqdeltah+b3(x,y,z)/deltah2 + if (iz == idim) then + zt(k) = g(x,y,done)*(-val(icoeff)) + zt(k) + else + icol(icoeff) = (ix-1)*idim*idim+(iy-1)*idim+(iz+1) + irow(icoeff) = glob_row + icoeff = icoeff+1 + endif + ! term depending on (x,y+1,z) + val(icoeff)=-a2(x,y,z)/sqdeltah+b2(x,y,z)/deltah2 + if (iy == idim) then + zt(k) = g(x,done,z)*(-val(icoeff)) + zt(k) + else + icol(icoeff) = (ix-1)*idim*idim+(iy)*idim+(iz) + irow(icoeff) = glob_row + icoeff = icoeff+1 + endif + ! term depending on (x+1,y,z) + val(icoeff)=-a1(x,y,z)/sqdeltah+b1(x,y,z)/deltah2 + if (ix==idim) then + zt(k) = g(done,y,z)*(-val(icoeff)) + zt(k) + else + icol(icoeff) = (ix)*idim*idim+(iy-1)*idim+(iz) + irow(icoeff) = glob_row + icoeff = icoeff+1 + endif + + end do + call psb_spins(icoeff-1,irow,icol,val,a,desc_a,info) + if(info /= psb_success_) exit + call psb_geins(ib,myidx(ii:ii+ib-1),zt(1:ib),bv,desc_a,info) + if(info /= psb_success_) exit + zt(:)=0.d0 + call psb_geins(ib,myidx(ii:ii+ib-1),zt(1:ib),xv,desc_a,info) + if(info /= psb_success_) exit + end do + + tgen = psb_wtime()-t1 + if(info /= psb_success_) then + info=psb_err_from_subroutine_ + ch_err='insert rout.' + call psb_errpush(info,name,a_err=ch_err) + goto 9999 + end if + + deallocate(val,irow,icol) + + call psb_barrier(ictxt) + t1 = psb_wtime() + call psb_cdasb(desc_a,info,mold=imold) + tcdasb = psb_wtime()-t1 + call psb_barrier(ictxt) + t1 = psb_wtime() + if (info == psb_success_) then + if (present(amold)) then + call psb_spasb(a,desc_a,info,dupl=psb_dupl_err_,mold=amold) + else + call psb_spasb(a,desc_a,info,dupl=psb_dupl_err_,afmt=afmt) + end if + end if + call psb_barrier(ictxt) + if(info /= psb_success_) then + info=psb_err_from_subroutine_ + ch_err='asb rout.' + call psb_errpush(info,name,a_err=ch_err) + goto 9999 + end if + if (info == psb_success_) call psb_geasb(xv,desc_a,info,mold=vmold) + if (info == psb_success_) call psb_geasb(bv,desc_a,info,mold=vmold) + if(info /= psb_success_) then + info=psb_err_from_subroutine_ + ch_err='asb rout.' + call psb_errpush(info,name,a_err=ch_err) + goto 9999 + end if + tasb = psb_wtime()-t1 + call psb_barrier(ictxt) + ttot = psb_wtime() - t0 + + call psb_amx(ictxt,talc) + call psb_amx(ictxt,tgen) + call psb_amx(ictxt,tasb) + call psb_amx(ictxt,ttot) + if(iam == psb_root_) then + tmpfmt = a%get_fmt() + write(psb_out_unit,'("The matrix has been generated and assembled in ",a3," format.")')& + & tmpfmt + write(psb_out_unit,'("-allocation time : ",es12.5)') talc + write(psb_out_unit,'("-coeff. gen. time : ",es12.5)') tgen + write(psb_out_unit,'("-desc asbly time : ",es12.5)') tcdasb + write(psb_out_unit,'("- mat asbly time : ",es12.5)') tasb + write(psb_out_unit,'("-total time : ",es12.5)') ttot + + end if + call psb_erractionrestore(err_act) + return + +9999 call psb_error_handler(ictxt,err_act) + + return + end subroutine psb_d_gen_pde3d + + +end module psb_d_pde3d_mod + program d_matgen use psb_base_mod use psb_util_mod + use psb_d_pde3d_mod use psb_d_xyz_mat_mod implicit none