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psblas3/base/comm/psb_covrl.f90

389 lines
14 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 2.2
!!$ (C) Copyright 2006/2007/2008
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$
!!$ 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.
!!$
!!$
!
! File: psb_covrl.f90
!
! Subroutine: psb_covrlm
! This subroutine performs the exchange of the overlap elements in a
! distributed dense matrix between all the processes.
!
! Arguments:
! x(:,:) - complex The local part of the dense matrix.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code.
! jx - integer(optional). The starting column of the global matrix
! ik - integer(optional). The number of columns to gather.
! work - real(optional). A work area.
! update - integer(optional). Type of update:
! psb_none_ do nothing
! psb_sum_ sum of overlaps
! psb_avg_ average of overlaps
! mode - integer(optional). Choose the algorithm for data exchange:
! this is chosen through bit fields.
! - swap_mpi = iand(flag,psb_swap_mpi_) /= 0
! - swap_sync = iand(flag,psb_swap_sync_) /= 0
! - swap_send = iand(flag,psb_swap_send_) /= 0
! - swap_recv = iand(flag,psb_swap_recv_) /= 0
! - if (swap_mpi): use underlying MPI_ALLTOALLV.
! - if (swap_sync): use PSB_SND and PSB_RCV in
! synchronized pairs
! - if (swap_send .and. swap_recv): use mpi_irecv
! and mpi_send
! - if (swap_send): use psb_snd (but need another
! call with swap_recv to complete)
! - if (swap_recv): use psb_rcv (completing a
! previous call with swap_send)
!
!
subroutine psb_covrlm(x,desc_a,info,jx,ik,work,update,mode)
use psb_sparse_mod, psb_protect_name => psb_covrlm
use psi_mod
implicit none
complex(psb_spk_), intent(inout), target :: x(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
complex(psb_spk_), optional, target, intent(inout) :: work(:)
integer, intent(in), optional :: update,jx,ik,mode
! locals
integer :: ictxt, np, me, &
& err_act, m, n, iix, jjx, ix, ijx, nrow, ncol, k, maxk, update_,&
& mode_, err, liwork
complex(psb_spk_),pointer :: iwork(:), xp(:,:)
logical :: do_swap
character(len=20) :: name, ch_err
logical :: aliw
name='psb_covrlm'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
! check on blacs grid
call psb_info(ictxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
if (present(jx)) then
ijx = jx
else
ijx = 1
endif
m = psb_cd_get_global_rows(desc_a)
n = psb_cd_get_global_cols(desc_a)
nrow = psb_cd_get_local_rows(desc_a)
ncol = psb_cd_get_local_cols(desc_a)
maxk=size(x,2)-ijx+1
if(present(ik)) then
if(ik > maxk) then
k=maxk
else
k=ik
end if
else
k = maxk
end if
if (present(update)) then
update_ = update
else
update_ = psb_avg_
endif
if (present(mode)) then
mode_ = mode
else
mode_ = IOR(psb_swap_send_,psb_swap_recv_)
endif
do_swap = (mode_ /= 0)
! check vector correctness
call psb_chkvect(m,1,size(x,1),ix,ijx,desc_a,info,iix,jjx)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
end if
if (iix /= 1) then
info=psb_err_ix_n1_iy_n1_unsupported_
call psb_errpush(info,name)
end if
err=info
call psb_errcomm(ictxt,err)
if(err /= 0) goto 9999
! check for presence/size of a work area
liwork=ncol
if (present(work)) then
if(size(work) >= liwork) then
aliw=.false.
else
aliw=.true.
end if
else
aliw=.true.
end if
if (aliw) then
allocate(iwork(liwork),stat=info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='Allocate')
goto 9999
end if
else
iwork => work
end if
! exchange overlap elements
if(do_swap) then
xp => x(iix:size(x,1),jjx:jjx+k-1)
call psi_swapdata(mode_,k,cone,xp,&
& desc_a,iwork,info,data=psb_comm_ovr_)
end if
if (info == psb_success_) call psi_ovrl_upd(xp,desc_a,update_,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Inner updates')
goto 9999
end if
if (aliw) deallocate(iwork)
nullify(iwork)
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error(ictxt)
return
end if
return
end subroutine psb_covrlm
!!$
!!$ Parallel Sparse BLAS version 2.2
!!$ (C) Copyright 2006/2007/2008
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$
!!$ 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_covrlv
! This subroutine performs the exchange of the overlap elements in a
! distributed dense vector between all the processes.
!
! Arguments:
! x(:) - complex The local part of the dense vector.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code.
! work - real(optional). A work area.
! update - integer(optional). Type of update:
! psb_none_ do nothing
! psb_sum_ sum of overlaps
! psb_avg_ average of overlaps
! mode - integer(optional). Choose the algorithm for data exchange:
! this is chosen through bit fields.
! - swap_mpi = iand(flag,psb_swap_mpi_) /= 0
! - swap_sync = iand(flag,psb_swap_sync_) /= 0
! - swap_send = iand(flag,psb_swap_send_) /= 0
! - swap_recv = iand(flag,psb_swap_recv_) /= 0
! - if (swap_mpi): use underlying MPI_ALLTOALLV.
! - if (swap_sync): use PSB_SND and PSB_RCV in
! synchronized pairs
! - if (swap_send .and. swap_recv): use mpi_irecv
! and mpi_send
! - if (swap_send): use psb_snd (but need another
! call with swap_recv to complete)
! - if (swap_recv): use psb_rcv (completing a
! previous call with swap_send)
!
!
subroutine psb_covrlv(x,desc_a,info,work,update,mode)
use psb_sparse_mod, psb_protect_name => psb_covrlv
use psi_mod
implicit none
complex(psb_spk_), intent(inout), target :: x(:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
complex(psb_spk_), optional, target, intent(inout) :: work(:)
integer, intent(in), optional :: update,mode
! locals
integer :: ictxt, np, me, &
& err_act, m, n, iix, jjx, ix, ijx, nrow, ncol, k, update_,&
& mode_, err, liwork
complex(psb_spk_),pointer :: iwork(:)
logical :: do_swap
character(len=20) :: name, ch_err
logical :: aliw
name='psb_covrlv'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
! check on blacs grid
call psb_info(ictxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
ijx = 1
m = psb_cd_get_global_rows(desc_a)
n = psb_cd_get_global_cols(desc_a)
nrow = psb_cd_get_local_rows(desc_a)
ncol = psb_cd_get_local_cols(desc_a)
k = 1
if (present(update)) then
update_ = update
else
update_ = psb_avg_
endif
if (present(mode)) then
mode_ = mode
else
mode_ = IOR(psb_swap_send_,psb_swap_recv_)
endif
do_swap = (mode_ /= 0)
! check vector correctness
call psb_chkvect(m,1,size(x),ix,ijx,desc_a,info,iix,jjx)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
end if
if (iix /= 1) then
info=psb_err_ix_n1_iy_n1_unsupported_
call psb_errpush(info,name)
end if
err=info
call psb_errcomm(ictxt,err)
if(err /= 0) goto 9999
! check for presence/size of a work area
liwork=ncol
if (present(work)) then
if(size(work) >= liwork) then
aliw=.false.
else
aliw=.true.
end if
else
aliw=.true.
end if
if (aliw) then
allocate(iwork(liwork),stat=info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='Allocate')
goto 9999
end if
else
iwork => work
end if
! exchange overlap elements
if (do_swap) then
call psi_swapdata(mode_,cone,x(:),&
& desc_a,iwork,info,data=psb_comm_ovr_)
end if
if (info == psb_success_) call psi_ovrl_upd(x,desc_a,update_,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Inner updates')
goto 9999
end if
if (aliw) deallocate(iwork)
nullify(iwork)
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error(ictxt)
return
end if
return
end subroutine psb_covrlv