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Added usage of distributed MUMPS inside Richardson iteration, and usage of distributed MUMPS from snapshot

Browse Source
mumps-devel
Fabio Durastante 2 weeks ago
parent e83082d457
commit f571b7aa9a
7 changed files with 396 additions and 17 deletions
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3
amgprec/amg_d_richards_smoother.f90
Unescape Escape View File

@ -342,7 +342,8 @@ contains
class(amg_d_richards_smoother_type), intent(inout) :: sm
integer(psb_ipk_) :: val
val = 2
! apply_vect uses tx, ty, tz mapped to wv(1:3)
val = 3
if (allocated(sm%sv)) val = val + sm%sv%get_wrksz()
end function d_richards_smoother_get_wrksize

7
amgprec/impl/level/amg_d_base_onelev_csetc.F90
Unescape Escape View File

@ -46,6 +46,7 @@ subroutine amg_d_base_onelev_csetc(lv,what,val,info,pos,idx)
use amg_d_poly_smoother
use amg_d_jac_smoother
use amg_d_as_smoother
use amg_d_richards_smoother
use amg_d_diag_solver
use amg_d_l1_diag_solver
use amg_d_jac_solver
@ -97,6 +98,7 @@ subroutine amg_d_base_onelev_csetc(lv,what,val,info,pos,idx)
type(amg_d_invk_solver_type) :: amg_d_invk_solver_mold
type(amg_d_invt_solver_type) :: amg_d_invt_solver_mold
type(amg_d_poly_smoother_type) :: amg_d_poly_smoother_mold
type(amg_d_richards_smoother_type) :: amg_d_richards_smoother_mold
#if defined(AMG_HAVE_UMF)
type(amg_d_umf_solver_type) :: amg_d_umf_solver_mold
#endif
@ -161,6 +163,11 @@ subroutine amg_d_base_onelev_csetc(lv,what,val,info,pos,idx)
case ('POLY')
call lv%set(amg_d_poly_smoother_mold,info,pos=pos)
if (info == 0) call lv%set(amg_d_l1_diag_solver_mold,info,pos=pos)
case ('RICHARDS','RICHARDSON')
call lv%set(amg_d_richards_smoother_mold,info,pos=pos)
if (info == 0) call lv%set(amg_d_ilu_solver_mold,info,pos=pos)
case ('GS','FWGS')
call lv%set(amg_d_jac_smoother_mold,info,pos='pre')
if (info == 0) call lv%set(amg_d_gs_solver_mold,info,pos='pre')

6
amgprec/impl/level/amg_d_base_onelev_cseti.F90
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@ -45,6 +45,7 @@ subroutine amg_d_base_onelev_cseti(lv,what,val,info,pos,idx)
use amg_d_parmatch_aggregator_mod
use amg_d_jac_smoother
use amg_d_as_smoother
use amg_d_richards_smoother
use amg_d_diag_solver
use amg_d_l1_diag_solver
use amg_d_ilu_solver
@ -79,6 +80,7 @@ subroutine amg_d_base_onelev_cseti(lv,what,val,info,pos,idx)
type(amg_d_jac_smoother_type) :: amg_d_jac_smoother_mold
type(amg_d_l1_jac_smoother_type) :: amg_d_l1_jac_smoother_mold
type(amg_d_as_smoother_type) :: amg_d_as_smoother_mold
type(amg_d_richards_smoother_type) :: amg_d_richards_smoother_mold
type(amg_d_diag_solver_type) :: amg_d_diag_solver_mold
type(amg_d_l1_diag_solver_type) :: amg_d_l1_diag_solver_mold
type(amg_d_ilu_solver_type) :: amg_d_ilu_solver_mold
@ -141,6 +143,10 @@ subroutine amg_d_base_onelev_cseti(lv,what,val,info,pos,idx)
call lv%set(amg_d_as_smoother_mold,info,pos=pos)
if (info == 0) call lv%set(amg_d_ilu_solver_mold,info,pos=pos)
case (amg_richardson_)
call lv%set(amg_d_richards_smoother_mold,info,pos=pos)
if (info == 0) call lv%set(amg_d_ilu_solver_mold,info,pos=pos)
case (amg_fbgs_)
call lv%set(amg_d_jac_smoother_mold,info,pos='pre')
if (info == 0) call lv%set(amg_d_gs_solver_mold,info,pos='pre')

147
amgprec/impl/solver/amg_d_mumps_solver_apply.F90
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@ -59,14 +59,18 @@ subroutine d_mumps_solver_apply(alpha,sv,x,beta,y,desc_data,&
integer(psb_lpk_) :: nglob
integer(psb_epk_) :: eng
real(psb_dpk_), allocatable :: ww(:)
real(psb_dpk_), allocatable, target :: rhs_loc(:), sol_loc(:)
real(psb_dpk_), allocatable, target :: gx(:)
integer(psb_lpk_), allocatable :: gidx(:)
integer, allocatable, target :: irhs_loc(:), isol_loc(:)
integer(psb_ipk_) :: i, err_act
character :: trans_
character(len=20) :: name='d_mumps_solver_apply'
call psb_erractionsave(err_act)
#if defined(AMG_HAVE_MUMPS)
#if defined(AMG_HAVE_MUMPS)
#if defined(AMG_MUMPS_VERSION) && (AMG_MUMPS_VERSION <= 590)
info = psb_success_
trans_ = psb_toupper(trans)
select case(trans_)
@ -154,6 +158,147 @@ subroutine d_mumps_solver_apply(alpha,sv,x,beta,y,desc_data,&
call psb_erractionrestore(err_act)
return
#else
! Snapshot MUMPS branch (e.g. snapshot06052026 and newer snapshots).
info = psb_success_
trans_ = psb_toupper(trans)
select case(trans_)
case('N')
case('T')
case default
call psb_errpush(psb_err_iarg_invalid_i_,name)
goto 9999
end select
nglob = desc_data%get_global_rows()
n_row = desc_data%get_local_rows()
n_col = desc_data%get_local_cols()
if (sv%ipar(1) == amg_local_solver_ ) then
gx = x
sv%id%icntl(20) = 0
sv%id%icntl(21) = 0
else if (sv%ipar(1) == amg_global_solver_ ) then
if (n_col <= size(work)) then
ww = work(1:n_col)
else
allocate(ww(n_col),stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_request_
call psb_errpush(info,name,i_err=(/n_col/),&
& a_err='real(psb_dpk_)')
goto 9999
end if
end if
allocate(rhs_loc(max(n_row,1)),sol_loc(max(n_row,1)),&
& irhs_loc(max(n_row,1)),isol_loc(max(n_row,1)),stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_request_; eng = max(n_row,1)
call psb_errpush(info,name,e_err=(/eng/),&
& a_err='real(psb_dpk_)')
goto 9999
end if
ww = 0.0_psb_dpk_
sol_loc = 0.0_psb_dpk_
rhs_loc = 0.0_psb_dpk_
gidx = desc_data%get_global_indices(owned=.true.)
if (size(gidx) /= n_row) then
info = psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='Invalid local row distribution in MUMPS')
goto 9999
end if
if ((n_row > 0) .and. ((minval(gidx) < 1_psb_lpk_) .or. &
& (maxval(gidx) > int(huge(0),psb_lpk_)))) then
info = psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='Overflow in distributed MUMPS RHS indices')
goto 9999
end if
if (n_row > 0) then
rhs_loc(1:n_row) = x(1:n_row)
irhs_loc(1:n_row) = int(gidx(1:n_row))
isol_loc(1:n_row) = int(gidx(1:n_row))
end if
else
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='Invalid local/global solver in MUMPS')
goto 9999
end if
select case(trans_)
case('N')
sv%id%icntl(9) = 1
case('T')
sv%id%icntl(9) = 2
case default
call psb_errpush(psb_err_internal_error_,&
& name,a_err='Invalid TRANS in subsolve')
goto 9999
end select
sv%id%nrhs = 1
if (sv%ipar(1) == amg_local_solver_ ) then
sv%id%nloc_rhs = 0
sv%id%lrhs_loc = 0
sv%id%nsol_loc = 0
sv%id%lsol_loc = 0
nullify(sv%id%rhs_loc)
nullify(sv%id%irhs_loc)
nullify(sv%id%sol_loc)
nullify(sv%id%isol_loc)
sv%id%rhs => gx
else
nullify(sv%id%rhs)
sv%id%icntl(20) = 10
sv%id%nloc_rhs = n_row
sv%id%lrhs_loc = n_row
sv%id%rhs_loc => rhs_loc
sv%id%irhs_loc => irhs_loc
sv%id%icntl(21) = 2
sv%id%nsol_loc = n_row
sv%id%lsol_loc = n_row
sv%id%sol_loc => sol_loc
sv%id%isol_loc => isol_loc
end if
! Snapshot path: preserve stream settings coming from build,
! only enforce silent mode if the user did not set them explicitly.
if (sv%id%icntl(1) == 0) sv%id%icntl(1) = -1
if (sv%id%icntl(2) == 0) sv%id%icntl(2) = -1
if (sv%id%icntl(3) == 0) sv%id%icntl(3) = -1
if (sv%id%icntl(4) == 0) sv%id%icntl(4) = -1
sv%id%job = 3
call dmumps(sv%id)
if (sv%ipar(1) == amg_local_solver_ ) then
call psb_geaxpby(alpha,gx,beta,y,desc_data,info)
else
if (n_row > 0) ww(1:n_row) = sol_loc(1:n_row)
call psb_geaxpby(alpha,ww,beta,y,desc_data,info)
end if
nullify(sv%id%rhs)
nullify(sv%id%rhs_loc)
nullify(sv%id%irhs_loc)
nullify(sv%id%sol_loc)
nullify(sv%id%isol_loc)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,&
& name,a_err='Error in subsolve')
goto 9999
endif
if (allocated(ww)) deallocate(ww)
call psb_erractionrestore(err_act)
return
#endif
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then

168
amgprec/impl/solver/amg_d_mumps_solver_bld.F90
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@ -69,7 +69,8 @@ subroutine d_mumps_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
integer(psb_ipk_) :: np, iam, me, i, err_act, debug_unit, debug_level
character(len=20) :: name='d_mumps_solver_bld', ch_err
#if defined(AMG_HAVE_MUMPS)
#if defined(AMG_HAVE_MUMPS)
#if defined(AMG_MUMPS_VERSION) && (AMG_MUMPS_VERSION <= 590)
info=psb_success_
@ -245,6 +246,171 @@ subroutine d_mumps_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
call psb_erractionrestore(err_act)
return
#else
! Snapshot MUMPS branch (e.g. snapshot06052026 and newer snapshots).
info=psb_success_
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ctxt = desc_a%get_context()
call psb_info(ctxt, iam, np)
if (sv%ipar(1) == amg_local_solver_ ) then
call psb_init(ctxt1,np=1,basectxt=ctxt,ids=(/iam/))
else if (sv%ipar(1) == amg_global_solver_ ) then
call psb_init(ctxt1,basectxt=ctxt)
else
info = psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='Invalid local/global solver in MUMPS')
goto 9999
end if
icomm = ctxt1%get_mpic()
sv%local_ctxt = ctxt1
call psb_info(ctxt1, me, npr)
npc = 1
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),' start'
if(.not.allocated(sv%id)) then
allocate(sv%id,stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_dealloc_
call psb_errpush(info,name,a_err='amg_dmumps_default')
goto 9999
end if
end if
! Snapshot path: bind directly to the local communicator.
sv%id%comm = icomm
sv%id%job = -1
sv%id%par = 1
if (sv%ipar(3) == 2) then
sv%id%sym = 2
else
sv%id%sym = 0
end if
call dmumps(sv%id)
if (allocated(sv%icntl)) then
do i=1,amg_mumps_icntl_size
if (allocated(sv%icntl(i)%item)) then
sv%id%icntl(i) = sv%icntl(i)%item
end if
end do
end if
if (allocated(sv%rcntl)) then
do i=1,amg_mumps_rcntl_size
if (allocated(sv%rcntl(i)%item)) sv%id%cntl(i) = sv%rcntl(i)%item
end do
end if
sv%id%icntl(5)=0
sv%id%icntl(3)=sv%ipar(2)
nglob = desc_a%get_global_rows()
nrow_a = a%get_nrows()
if (sv%ipar(1) == amg_local_solver_ ) then
nglobrec=desc_a%get_local_rows()
if (sv%ipar(3) == 2) then
call a%triu(c,info,jmax=nrow_a)
call c%set_symmetric()
else
call a%csclip(c,info,jmax=nrow_a)
end if
call c%cp_to(acoo)
nglob = c%get_nrows()
if (nglobrec /= nglob) then
write(*,*)'WARNING: MUMPS solver does not allow overlap in AS yet. '
write(*,*)'A zero-overlap is used instead'
end if
else
call a%cp_to(acoo)
end if
nza = acoo%get_nzeros()
if ((sv%ipar(1) == amg_global_solver_) .and. (nza > 0)) then
#if defined(PSB_IPK4) && defined(PSB_LPK8)
if (nglob > huge(1_psb_ipk_)) then
write(0,*) iam,' ',trim(name),': Error: overflow of local indices '
info=psb_err_internal_error_
call psb_errpush(info,name)
goto 9999
end if
gia = acoo%ia(1:nza)
gja = acoo%ja(1:nza)
call psb_loc_to_glob(gia(1:nza), desc_a, info, iact='I')
call psb_loc_to_glob(gja(1:nza), desc_a, info, iact='I')
acoo%ia(1:nza) = gia(1:nza)
acoo%ja(1:nza) = gja(1:nza)
#else
call psb_loc_to_glob(acoo%ja(1:nza), desc_a, info, iact='I')
call psb_loc_to_glob(acoo%ia(1:nza), desc_a, info, iact='I')
#endif
if (sv%ipar(3) == 2 ) then
block
integer(psb_ipk_) :: j,nz
nz = 0
do j=1,nza
if (acoo%ja(j) >= acoo%ia(j)) then
nz = nz + 1
acoo%ia(nz) = acoo%ia(j)
acoo%ja(nz) = acoo%ja(j)
acoo%val(nz) = acoo%val(j)
end if
end do
call acoo%set_nzeros(nz)
call acoo%set_triangle()
call acoo%set_upper()
call acoo%set_symmetric()
nza = nz
end block
end if
end if
! Snapshot input mode: distributed assembled matrix.
! Each process contributes its own non-overlapping local triplets.
sv%id%irn_loc => acoo%ia
sv%id%jcn_loc => acoo%ja
sv%id%a_loc => acoo%val
sv%id%icntl(18) = 3
sv%id%n = nglob
sv%id%nnz_loc = acoo%get_nzeros()
sv%id%nnz = acoo%get_nzeros()
sv%id%job = 4
if (sv%ipar(1) == amg_global_solver_ ) then
call psb_sum(ctxt,sv%id%nnz)
end if
call dmumps(sv%id)
info = sv%id%infog(1)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='amg_dmumps_fact '
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
nullify(sv%id%irn)
nullify(sv%id%jcn)
nullify(sv%id%a)
call acoo%free()
sv%built=.true.
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) iam,' ',trim(name),' end'
call psb_erractionrestore(err_act)
return
#endif
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then

65
samples/advanced/pdegen/amg_d_pde3d.F90
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@ -160,6 +160,11 @@ program amg_d_pde3d
integer(psb_ipk_) :: fill ! fill-in for incomplete LU factorization
integer(psb_ipk_) :: invfill ! Inverse fill-in for INVK
real(psb_dpk_) :: thr ! threshold for ILUT factorization
integer(psb_ipk_) :: mumps_blr_icntl35 ! BLR activation/format (ICNTL(35))
integer(psb_ipk_) :: mumps_blr_icntl36 ! BLR variant (ICNTL(36))
integer(psb_ipk_) :: mumps_blr_icntl37 ! BLR block size (ICNTL(37))
integer(psb_ipk_) :: mumps_blr_icntl38 ! BLR compression option (ICNTL(38))
real(psb_dpk_) :: mumps_blr_cntl7 ! BLR drop parameter (CNTL(7))
! AMG post-smoother; ignored by 1-lev preconditioner
character(len=32) :: smther2 ! post-smoother type: BJAC, AS
@ -319,8 +324,14 @@ program amg_d_pde3d
call prec%set('solver_sweeps', p_choice%ssweeps, info)
call prec%set('poly_degree', p_choice%degree, info)
call prec%set('poly_variant', p_choice%pvariant, info)
if (psb_toupper(p_choice%solve)=='MUMPS') &
& call prec%set('mumps_loc_glob','local_solver',info)
if (psb_toupper(p_choice%solve)=='MUMPS') then
call prec%set('mumps_loc_glob','local_solver',info)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl35,info,idx=35_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl36,info,idx=36_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl37,info,idx=37_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl38,info,idx=38_psb_ipk_)
call prec%set('mumps_rpar_entry',p_choice%mumps_blr_cntl7,info,idx=7_psb_ipk_)
end if
call prec%set('sub_fillin', p_choice%fill, info)
call prec%set('sub_iluthrs', p_choice%thr, info)
@ -331,8 +342,14 @@ program amg_d_pde3d
call prec%set('sub_prol', p_choice%prol, info)
call prec%set('sub_solve', p_choice%solve, info)
call prec%set('solver_sweeps', p_choice%ssweeps, info)
if (psb_toupper(p_choice%solve)=='MUMPS') &
& call prec%set('mumps_loc_glob','local_solver',info)
if (psb_toupper(p_choice%solve)=='MUMPS') then
call prec%set('mumps_loc_glob','local_solver',info)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl35,info,idx=35_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl36,info,idx=36_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl37,info,idx=37_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl38,info,idx=38_psb_ipk_)
call prec%set('mumps_rpar_entry',p_choice%mumps_blr_cntl7,info,idx=7_psb_ipk_)
end if
call prec%set('sub_fillin', p_choice%fill, info)
call prec%set('sub_iluthrs', p_choice%thr, info)
@ -391,8 +408,19 @@ program amg_d_pde3d
call prec%set('ainv_alg', p_choice%variant, info)
case default
call prec%set('sub_solve', p_choice%solve, info)
if (psb_toupper(p_choice%solve)=='MUMPS') &
& call prec%set('mumps_loc_glob','local_solver',info)
if (psb_toupper(p_choice%solve)=='MUMPS') then
if (psb_toupper(p_choice%smther) == 'RICHARDS' .or. &
& psb_toupper(p_choice%smther) == 'RICHARDSON') then
call prec%set('mumps_loc_glob','global_solver',info)
else
call prec%set('mumps_loc_glob','local_solver',info)
end if
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl35,info,idx=35_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl36,info,idx=36_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl37,info,idx=37_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl38,info,idx=38_psb_ipk_)
call prec%set('mumps_rpar_entry',p_choice%mumps_blr_cntl7,info,idx=7_psb_ipk_)
end if
end select
call prec%set('solver_sweeps', p_choice%ssweeps, info)
call prec%set('sub_fillin', p_choice%fill, info)
@ -428,8 +456,19 @@ program amg_d_pde3d
call prec%set('ainv_alg', p_choice%variant2, info)
case default
call prec%set('sub_solve', p_choice%solve2, info, pos='post')
if (psb_toupper(p_choice%solve2)=='MUMPS') &
& call prec%set('mumps_loc_glob','local_solver',info)
if (psb_toupper(p_choice%solve2)=='MUMPS') then
if (psb_toupper(p_choice%smther2) == 'RICHARDS' .or. &
& psb_toupper(p_choice%smther2) == 'RICHARDSON') then
call prec%set('mumps_loc_glob','global_solver',info)
else
call prec%set('mumps_loc_glob','local_solver',info)
end if
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl35,info,idx=35_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl36,info,idx=36_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl37,info,idx=37_psb_ipk_)
call prec%set('mumps_ipar_entry',p_choice%mumps_blr_icntl38,info,idx=38_psb_ipk_)
call prec%set('mumps_rpar_entry',p_choice%mumps_blr_cntl7,info,idx=7_psb_ipk_)
end if
end select
call prec%set('solver_sweeps', p_choice%ssweeps2, info,pos='post')
call prec%set('sub_fillin', p_choice%fill2, info,pos='post')
@ -674,6 +713,11 @@ contains
call read_data(prec%fill,inp_unit) ! fill-in for incomplete LU
call read_data(prec%invfill,inp_unit) !Inverse fill-in for INVK
call read_data(prec%thr,inp_unit) ! threshold for ILUT
call read_data(prec%mumps_blr_icntl35,inp_unit) ! MUMPS ICNTL(35)
call read_data(prec%mumps_blr_icntl36,inp_unit) ! MUMPS ICNTL(36)
call read_data(prec%mumps_blr_icntl37,inp_unit) ! MUMPS ICNTL(37)
call read_data(prec%mumps_blr_icntl38,inp_unit) ! MUMPS ICNTL(38)
call read_data(prec%mumps_blr_cntl7,inp_unit) ! MUMPS CNTL(7)
! Second smoother/ AMG post-smoother (if NONE ignored in main)
call read_data(prec%smther2,inp_unit) ! smoother type
call read_data(prec%jsweeps2,inp_unit) ! (post-)smoother sweeps
@ -775,6 +819,11 @@ contains
call psb_bcast(ctxt,prec%fill)
call psb_bcast(ctxt,prec%invfill)
call psb_bcast(ctxt,prec%thr)
call psb_bcast(ctxt,prec%mumps_blr_icntl35)
call psb_bcast(ctxt,prec%mumps_blr_icntl36)
call psb_bcast(ctxt,prec%mumps_blr_icntl37)
call psb_bcast(ctxt,prec%mumps_blr_icntl38)
call psb_bcast(ctxt,prec%mumps_blr_cntl7)
! broadcast second (post-)smoother
call psb_bcast(ctxt,prec%smther2)
call psb_bcast(ctxt,prec%jsweeps2)

17
samples/advanced/pdegen/runs/amg_pde3d.inp
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@ -1,12 +1,12 @@
%%%%%%%%%%% General arguments % Lines starting with % are ignored.
CSR ! Storage format CSR COO JAD
0150 ! IDIM; domain size. Linear system size is IDIM**3
00070 ! IDIM; domain size. Linear system size is IDIM**3
POISSON ! PDECOEFF: POISSON, EXP, BOX, GAUSS
% ! Coefficients of the PDE
CG ! Iterative method:
% ! BiCGSTAB BiCGSTABL BiCG CG CGS FCG GCR RGMRES RICHARDSON
2 ! ISTOPC
00500 ! ITMAX
00100 ! ITMAX
1 ! ITRACE
30 ! IRST (restart for RGMRES and BiCGSTABL)
1.d-6 ! EPS
@ -15,8 +15,8 @@ ML-VBM-VCYC-POLY-L1-D-BJAC ! Longer descriptive name for preconditioner (u
ML ! Preconditioner type: NONE JACOBI GS FBGS BJAC AS ML POLY
%
%%%%%%%%%%% First smoother (for all levels but coarsest) %%%%%%%%%%%%%%%%
POLY ! Smoother type JACOBI FBGS GS BWGS BJAC AS POLY r 1-level, repeats previous.
6 ! Number of sweeps for smoother
RICHARDS ! Smoother type JACOBI FBGS GS BWGS BJAC AS POLY RICHARDS r 1-level, repeats previous.
1 ! Number of sweeps for smoother
6 ! degree for polynomial smoother
CHEB_4_OPT ! Polynomial variant
% Fields to be added for POLY
@ -28,12 +28,17 @@ POLY_RHO_EST_POWER ! POLY_RHO_ESTIMATE Currently only POLY_RH
0 ! Number of overlap layers for AS preconditioner
HALO ! AS restriction operator: NONE HALO
NONE ! AS prolongation operator: NONE SUM AVG
L1-JACOBI ! Subdomain solver for BJAC/AS: JACOBI GS BGS ILU ILUT MILU MUMPS SLU UMF
MUMPS ! Subdomain solver for BJAC/AS: JACOBI GS BGS ILU ILUT MILU MUMPS SLU UMF
1 ! Inner solver sweeps (GS and JACOBI)
LLK ! AINV variant
0 ! Fill level P for ILU(P) and ILU(T,P)
1 ! Inverse Fill level P for INVK
1.d-4 ! Threshold T for ILU(T,P)
1 ! MUMPS ICNTL(35) BLR activation/format
0 ! MUMPS ICNTL(36) BLR variant
256 ! MUMPS ICNTL(37) BLR block size
333 ! MUMPS ICNTL(38) BLR compression option
1.d-2 ! MUMPS CNTL(7) BLR dropping parameter
%%%%%%%%%%% Second smoother, always ignored for non-ML %%%%%%%%%%%%%%%%
NONE ! Second (post) smoother, ignored if NONE
6 ! Number of sweeps for (post) smoother
@ -68,7 +73,7 @@ FILTER ! Filtering of matrix: FILTER NOFILTER
-2 ! Number of thresholds in vector, next line ignored if <= 0
0.05 0.025 ! Thresholds
%%%%%%%%%%% Coarse level solver %%%%%%%%%%%%%%%%
BJAC ! Coarsest-level solver: MUMPS UMF SLU SLUDIST JACOBI GS BJAC KRM
MUMPS ! Coarsest-level solver: MUMPS UMF SLU SLUDIST JACOBI GS BJAC KRM
ILU ! Coarsest-level subsolver for BJAC: ILU ILUT MILU UMF MUMPS SLU
DIST ! Coarsest-level matrix distribution: DIST REPL
1 ! Coarsest-level fillin P for ILU(P) and ILU(T,P)

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