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87 lines
3.2 KiB
Fortran
87 lines
3.2 KiB
Fortran
!!$
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!!$ Parallel Sparse BLAS v2.0
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!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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!!$
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!!$ Redistribution and use in source and binary forms, with or without
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!!$ modification, are permitted provided that the following conditions
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!!$ are met:
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!!$ 1. Redistributions of source code must retain the above copyright
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!!$ notice, this list of conditions and the following disclaimer.
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!!$ 2. Redistributions in binary form must reproduce the above copyright
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!!$ notice, this list of conditions, and the following disclaimer in the
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!!$ documentation and/or other materials provided with the distribution.
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!!$ 3. The name of the PSBLAS group or the names of its contributors may
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!!$ not be used to endorse or promote products derived from this
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!!$ software without specific written permission.
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!!$
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!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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!!$ POSSIBILITY OF SUCH DAMAGE.
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!!$
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!!$
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module comminfo
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contains
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subroutine get_comminfo(icontxt,desc_a,comm_info)
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use typedesc
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implicit none
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type(desc_type) :: desc_a
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integer,pointer:: comm_info(:,:)
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integer :: icontxt, nprow, npcol, myprow, mypcol,&
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& i,cnt,proc,n_elem_recv,n_elem_send
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integer,pointer:: sndbuf(:)
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call blacs_gridinfo(icontxt, nprow, npcol, myprow, mypcol)
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! write(0,*)'inside comminfo',nprow,npcol,myprow,mypcol
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allocate(sndbuf(nprow))
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sndbuf(:)=0
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cnt=1
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do while(desc_a%halo_index(cnt).ne.-1)
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proc=desc_a%halo_index(cnt+proc_id_)
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n_elem_recv=desc_a%halo_index(cnt+n_elem_recv_)
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n_elem_send=desc_a%halo_index(cnt+n_elem_recv+n_elem_send_)
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cnt=cnt+n_elem_recv+n_elem_send+3
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sndbuf(proc+1)=n_elem_send
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end do
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if(myprow.eq.0) then
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comm_info(1,:)=sndbuf(:)
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deallocate(sndbuf)
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do i=1,nprow-1
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sndbuf=>comm_info(i+1,:)
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! call igerv2d( icontxt, 1, nprow, comm_info(i+1,:), nprow, i, 0)
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call igerv2d( icontxt, nprow,1, sndbuf, nprow, i, 0 )
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! write(0,'("Root has received from process n.",i3)'),i
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! write(0,*) comm_info(i+1,:)
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! write(0,*) sndbuf
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end do
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else
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! write(0,'("Process n.",i3," is sending to root")'),myprow
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! write(0,*) sndbuf
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call igesd2d( icontxt, nprow,1, sndbuf, nprow, 0, 0 )
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end if
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end subroutine get_comminfo
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end module comminfo
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