fdurastante
/
amg4psblas
mirror of https://github.com/sfilippone/amg4psblas.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

mld2p4-2:

Browse Source 
mlprec/mld_d_prec_type.f90

Further comments in D_PREC_TYPE documenting the internals.
stopcriterion
Salvatore Filippone 13 years ago
parent 25d97dbada
commit ffe4fe1f0c
1 changed files with 340 additions and 211 deletions
Show Stats Download Patch File Download Diff File

551
mlprec/mld_d_prec_type.f90
Unescape Escape View File

@ -78,7 +78,7 @@ module mld_d_prec_type
! Type: mld_Tonelev_type.
!
! It is the data type containing the necessary items for the current
! level (essentially, the base preconditioner, the current-level matrix
! level (essentially, the smoother, the current-level matrix
! and the restriction and prolongation operators).
!
! type mld_Tonelev_type
@ -344,6 +344,7 @@ module mld_d_prec_type
contains
!
! Function returning the size of the mld_prec_type data structure
! in bytes or in number of nonzeros of the operator(s) involved.
!
function d_base_solver_get_nzeros(sv) result(val)
@ -415,6 +416,14 @@ contains
if (allocated(lv%sm)) val = val + lv%sm%sizeof()
end function d_base_onelev_sizeof
!
! Operator complexity: ratio of total number
! of nonzeros in the aggregated matrices at the
! various level to the nonzeroes at the fine level
! (original matrix)
!
function mld_d_get_compl(prec) result(val)
implicit none
class(mld_dprec_type), intent(in) :: prec
@ -563,20 +572,6 @@ contains
end subroutine mld_dfile_prec_descr
!
! Subroutines: mld_Tbase_precfree, mld_T_onelev_precfree, mld_Tprec_free
! Version: real/complex
!
! These routines deallocate the mld_Tbaseprec_type, mld_Tonelev_type and
! mld_Tprec_type data structures.
!
! Arguments:
! p - type(mld_Tbaseprec_type/mld_Tonelev_type/mld_Tprec_type), input.
! The data structure to be deallocated.
! info - integer, output.
! error code.
!
subroutine d_base_onelev_descr(lv,il,nl,info,iout)
use psb_base_mod
@ -646,6 +641,20 @@ contains
return
end subroutine d_base_onelev_descr
!
! Subroutines: mld_Tbase_precfree, mld_T_onelev_precfree, mld_Tprec_free
! Version: real/complex
!
! These routines deallocate the mld_Tbaseprec_type, mld_Tonelev_type and
! mld_Tprec_type data structures.
!
! Arguments:
! p - type(mld_Tbaseprec_type/mld_Tonelev_type/mld_Tprec_type), input.
! The data structure to be deallocated.
! info - integer, output.
! error code.
!
subroutine d_base_onelev_free(lv,info)
use psb_base_mod
implicit none
@ -743,6 +752,18 @@ contains
end subroutine mld_dprec_free
!
! Smoother related routines/methods.
!
!
! Apply: comes in two versions, on plain arrays or on encapsulated
! vectors.
! This basic version just applies the local solver, whatever that
! is.
!
subroutine d_base_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,sweeps,work,info)
use psb_base_mod
type(psb_desc_type), intent(in) :: desc_data
@ -824,6 +845,12 @@ contains
end subroutine d_base_smoother_apply_vect
!
! Check:
! 1. Check that we do have a solver object
! 2. Call its check method
!
subroutine d_base_smoother_check(sm,info)
use psb_base_mod
@ -861,6 +888,16 @@ contains
return
end subroutine d_base_smoother_check
!
! Set methods: the come in multiple versions according
! to whether we are setting with integer, real or character
! input.
! The basic rule is: if the input refers to a parameter
! of the smoother, use it, otherwise pass it to the
! solver object for further processing.
! Since there are no parameters in the base smoother
! we just pass everything to the solver object.
!
subroutine d_base_smoother_seti(sm,what,val,info)
@ -966,6 +1003,15 @@ contains
return
end subroutine d_base_smoother_setr
!
! Build method.
! At base level we only have to pass data to the inner solver.
! AMOLD/VMOLD allow to have any relevant sparse matrix or vector
! to be stored in a given format. This is essential e.g.
! when dealing with GPUs.
!
subroutine d_base_smoother_bld(a,desc_a,sm,upd,info,amold,vmold)
use psb_base_mod
@ -1006,7 +1052,16 @@ contains
return
end subroutine d_base_smoother_bld
!
! Free method (aka destructor).
! For this one actually we could do without; however
! for cases where there are data objects allocated outside
! of the Fortran RTE we need to free them explicitly.
!
! Even in that case, we could do without this if FINAL
! subroutines were supported, which is not the case
! in GNU Fortran up to 4.7.
!
subroutine d_base_smoother_free(sm,info)
use psb_base_mod
@ -1043,6 +1098,10 @@ contains
return
end subroutine d_base_smoother_free
!
! Print a description
!
subroutine d_base_smoother_descr(sm,info,iout,coarse)
use psb_base_mod
@ -1099,6 +1158,51 @@ contains
return
end subroutine d_base_smoother_descr
!
! Dump
! to file, for debugging purposes.
!
subroutine d_base_smoother_dmp(sm,ictxt,level,info,prefix,head,smoother,solver)
use psb_base_mod
implicit none
class(mld_d_base_smoother_type), intent(in) :: sm
integer, intent(in) :: ictxt,level
integer, intent(out) :: info
character(len=*), intent(in), optional :: prefix, head
logical, optional, intent(in) :: smoother, solver
integer :: i, j, il1, iln, lname, lev
integer :: icontxt,iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
logical :: smoother_
! len of prefix_
info = 0
if (present(prefix)) then
prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
else
prefix_ = "dump_smth_d"
end if
call psb_info(ictxt,iam,np)
if (present(smoother)) then
smoother_ = smoother
else
smoother_ = .false.
end if
lname = len_trim(prefix_)
fname = trim(prefix_)
write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
lname = lname + 5
! At base level do nothing for the smoother
if (allocated(sm%sv)) &
& call sm%sv%dump(ictxt,level,info,solver=solver)
end subroutine d_base_smoother_dmp
function d_base_smoother_sizeof(sm) result(val)
implicit none
! Arguments
@ -1114,6 +1218,11 @@ contains
return
end function d_base_smoother_sizeof
!
! Set sensible defaults.
! To be called immediately after allocation
!
subroutine d_base_smoother_default(sm)
implicit none
! Arguments
@ -1126,6 +1235,21 @@ contains
end subroutine d_base_smoother_default
!
! Local solver related routines/methods.
!
!
! Apply: comes in two versions, on plain arrays or on encapsulated
! vectors.
! The base version throws an error, since it means that no explicit
! choice was made.
! Question: would it make sense to transform the base version into
! the ID version, i.e. "solver" is the identity operator?
!
subroutine d_base_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info)
use psb_base_mod
type(psb_desc_type), intent(in) :: desc_data
@ -1192,6 +1316,12 @@ contains
end subroutine d_base_solver_apply_vect
!
! Build
! The base version throws an error, since it means that no explicit
! choice was made.
!
subroutine d_base_solver_bld(a,desc_a,sv,upd,info,b,amold,vmold)
use psb_base_mod
@ -1336,6 +1466,13 @@ contains
return
end subroutine d_base_solver_setr
!
! Free
! The base version throws an error, since it means that no explicit
! choice was made. IS THIS CORRECT? I suspect it would be better
! to be silent here, to cover reallocation.
!
subroutine d_base_solver_free(sv,info)
use psb_base_mod
@ -1403,6 +1540,45 @@ contains
return
end subroutine d_base_solver_descr
subroutine d_base_solver_dmp(sv,ictxt,level,info,prefix,head,solver)
use psb_base_mod
implicit none
class(mld_d_base_solver_type), intent(in) :: sv
integer, intent(in) :: ictxt,level
integer, intent(out) :: info
character(len=*), intent(in), optional :: prefix, head
logical, optional, intent(in) :: solver
integer :: i, j, il1, iln, lname, lev
integer :: icontxt,iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
logical :: solver_
! len of prefix_
info = 0
if (present(prefix)) then
prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
else
prefix_ = "dump_slv_d"
end if
call psb_info(ictxt,iam,np)
if (present(solver)) then
solver_ = solver
else
solver_ = .false.
end if
lname = len_trim(prefix_)
fname = trim(prefix_)
write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
lname = lname + 5
! At base level do nothing for the solver
end subroutine d_base_solver_dmp
function d_base_solver_sizeof(sv) result(val)
implicit none
! Arguments
@ -1423,114 +1599,13 @@ contains
return
end subroutine d_base_solver_default
subroutine mld_d_apply2_vect(prec,x,y,desc_data,info,trans,work)
use psb_base_mod
type(psb_desc_type),intent(in) :: desc_data
class(mld_dprec_type), intent(inout) :: prec
type(psb_d_vect_type),intent(inout) :: x
type(psb_d_vect_type),intent(inout) :: y
integer, intent(out) :: info
character(len=1), optional :: trans
real(psb_dpk_),intent(inout), optional, target :: work(:)
Integer :: err_act
character(len=20) :: name='d_prec_apply'
call psb_erractionsave(err_act)
select type(prec)
type is (mld_dprec_type)
call mld_precaply(prec,x,y,desc_data,info,trans,work)
class default
info = psb_err_missing_override_method_
call psb_errpush(info,name)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine mld_d_apply2_vect
subroutine mld_d_apply2v(prec,x,y,desc_data,info,trans,work)
use psb_base_mod
type(psb_desc_type),intent(in) :: desc_data
class(mld_dprec_type), intent(in) :: prec
real(psb_dpk_),intent(inout) :: x(:)
real(psb_dpk_),intent(inout) :: y(:)
integer, intent(out) :: info
character(len=1), optional :: trans
real(psb_dpk_),intent(inout), optional, target :: work(:)
Integer :: err_act
character(len=20) :: name='d_prec_apply'
call psb_erractionsave(err_act)
select type(prec)
type is (mld_dprec_type)
call mld_precaply(prec,x,y,desc_data,info,trans,work)
class default
info = psb_err_missing_override_method_
call psb_errpush(info,name)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine mld_d_apply2v
subroutine mld_d_apply1v(prec,x,desc_data,info,trans)
use psb_base_mod
type(psb_desc_type),intent(in) :: desc_data
class(mld_dprec_type), intent(in) :: prec
real(psb_dpk_),intent(inout) :: x(:)
integer, intent(out) :: info
character(len=1), optional :: trans
Integer :: err_act
character(len=20) :: name='d_prec_apply'
call psb_erractionsave(err_act)
select type(prec)
type is (mld_dprec_type)
call mld_precaply(prec,x,desc_data,info,trans)
class default
info = psb_err_missing_override_method_
call psb_errpush(info,name)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine mld_d_apply1v
!
! Onelevel checks.
! The number of Jacobi sweeps to be applied is not
! tied to the Jacobi smoother: logically, you have
! a smoother and you can choose to apply it any number
! of times you like.
!
subroutine d_base_onelev_check(lv,info)
use psb_base_mod
@ -1576,6 +1651,15 @@ contains
return
end subroutine d_base_onelev_check
!
! Multilevel defaults:
! multiplicative vs. additive ML framework;
! Smoothed decoupled aggregation with zero threshold;
! distributed coarse matrix;
! damping omega computed with the max-norm estimate of the
! dominant eigenvalue;
! two-sided smoothing (i.e. V-cycle) with 1 smoothing sweep;
!
subroutine d_base_onelev_default(lv)
@ -1606,7 +1690,16 @@ contains
end subroutine d_base_onelev_default
!
! Set routines:
! Parameters belonging here are:
! Number of smoothing sweeps;
! Smoother position;
! Aggregation related parameters
! Record request on coarse level solver,
! for checks on solver vs. smoother nomenclature
! reconciliation.
!
subroutine d_base_onelev_seti(lv,what,val,info)
use psb_base_mod
@ -1764,40 +1857,10 @@ contains
return
end subroutine d_base_onelev_setr
subroutine mld_d_dump(prec,info,istart,iend,prefix,head,ac,rp,smoother,solver)
use psb_base_mod
implicit none
class(mld_dprec_type), intent(in) :: prec
integer, intent(out) :: info
integer, intent(in), optional :: istart, iend
character(len=*), intent(in), optional :: prefix, head
logical, optional, intent(in) :: smoother, solver,ac, rp
integer :: i, j, il1, iln, lname, lev
integer :: icontxt,iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
! len of prefix_
info = 0
iln = size(prec%precv)
if (present(istart)) then
il1 = max(1,istart)
else
il1 = 2
end if
if (present(iend)) then
iln = min(iln, iend)
end if
do lev=il1, iln
call prec%precv(lev)%dump(lev,info,prefix=prefix,head=head,&
& ac=ac,smoother=smoother,solver=solver,rp=rp)
end do
end subroutine mld_d_dump
!
! Dump on file: can be fine-tuned to include the (aggregated) matrix
! as well as smoother and solver.
!
subroutine d_base_onelev_dump(lv,level,info,prefix,head,ac,rp,smoother,solver)
use psb_base_mod
implicit none
@ -1863,85 +1926,151 @@ contains
end subroutine d_base_onelev_dump
subroutine d_base_smoother_dmp(sm,ictxt,level,info,prefix,head,smoother,solver)
!
! Top level methods.
!
subroutine mld_d_apply2_vect(prec,x,y,desc_data,info,trans,work)
use psb_base_mod
implicit none
class(mld_d_base_smoother_type), intent(in) :: sm
integer, intent(in) :: ictxt,level
integer, intent(out) :: info
character(len=*), intent(in), optional :: prefix, head
logical, optional, intent(in) :: smoother, solver
integer :: i, j, il1, iln, lname, lev
integer :: icontxt,iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
logical :: smoother_
! len of prefix_
type(psb_desc_type),intent(in) :: desc_data
class(mld_dprec_type), intent(inout) :: prec
type(psb_d_vect_type),intent(inout) :: x
type(psb_d_vect_type),intent(inout) :: y
integer, intent(out) :: info
character(len=1), optional :: trans
real(psb_dpk_),intent(inout), optional, target :: work(:)
Integer :: err_act
character(len=20) :: name='d_prec_apply'
info = 0
call psb_erractionsave(err_act)
if (present(prefix)) then
prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
else
prefix_ = "dump_smth_d"
select type(prec)
type is (mld_dprec_type)
call mld_precaply(prec,x,y,desc_data,info,trans,work)
class default
info = psb_err_missing_override_method_
call psb_errpush(info,name)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
call psb_info(ictxt,iam,np)
end subroutine mld_d_apply2_vect
if (present(smoother)) then
smoother_ = smoother
else
smoother_ = .false.
subroutine mld_d_apply2v(prec,x,y,desc_data,info,trans,work)
use psb_base_mod
type(psb_desc_type),intent(in) :: desc_data
class(mld_dprec_type), intent(in) :: prec
real(psb_dpk_),intent(inout) :: x(:)
real(psb_dpk_),intent(inout) :: y(:)
integer, intent(out) :: info
character(len=1), optional :: trans
real(psb_dpk_),intent(inout), optional, target :: work(:)
Integer :: err_act
character(len=20) :: name='d_prec_apply'
call psb_erractionsave(err_act)
select type(prec)
type is (mld_dprec_type)
call mld_precaply(prec,x,y,desc_data,info,trans,work)
class default
info = psb_err_missing_override_method_
call psb_errpush(info,name)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
lname = len_trim(prefix_)
fname = trim(prefix_)
write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
lname = lname + 5
return
! At base level do nothing for the smoother
if (allocated(sm%sv)) &
& call sm%sv%dump(ictxt,level,info,solver=solver)
end subroutine mld_d_apply2v
end subroutine d_base_smoother_dmp
subroutine mld_d_apply1v(prec,x,desc_data,info,trans)
use psb_base_mod
type(psb_desc_type),intent(in) :: desc_data
class(mld_dprec_type), intent(in) :: prec
real(psb_dpk_),intent(inout) :: x(:)
integer, intent(out) :: info
character(len=1), optional :: trans
Integer :: err_act
character(len=20) :: name='d_prec_apply'
subroutine d_base_solver_dmp(sv,ictxt,level,info,prefix,head,solver)
call psb_erractionsave(err_act)
select type(prec)
type is (mld_dprec_type)
call mld_precaply(prec,x,desc_data,info,trans)
class default
info = psb_err_missing_override_method_
call psb_errpush(info,name)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine mld_d_apply1v
subroutine mld_d_dump(prec,info,istart,iend,prefix,head,ac,rp,smoother,solver)
use psb_base_mod
implicit none
class(mld_d_base_solver_type), intent(in) :: sv
integer, intent(in) :: ictxt,level
class(mld_dprec_type), intent(in) :: prec
integer, intent(out) :: info
integer, intent(in), optional :: istart, iend
character(len=*), intent(in), optional :: prefix, head
logical, optional, intent(in) :: solver
logical, optional, intent(in) :: smoother, solver,ac, rp
integer :: i, j, il1, iln, lname, lev
integer :: icontxt,iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
logical :: solver_
! len of prefix_
info = 0
if (present(prefix)) then
prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
iln = size(prec%precv)
if (present(istart)) then
il1 = max(1,istart)
else
prefix_ = "dump_slv_d"
il1 = 2
end if
call psb_info(ictxt,iam,np)
if (present(solver)) then
solver_ = solver
else
solver_ = .false.
if (present(iend)) then
iln = min(iln, iend)
end if
lname = len_trim(prefix_)
fname = trim(prefix_)
write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
lname = lname + 5
! At base level do nothing for the solver
do lev=il1, iln
call prec%precv(lev)%dump(lev,info,prefix=prefix,head=head,&
& ac=ac,smoother=smoother,solver=solver,rp=rp)
end do
end subroutine mld_d_dump
end subroutine d_base_solver_dmp
end module mld_d_prec_type

Write Preview
Loading…
Cancel
Save