597266fdec
* New/improved bootstrapping technique for DLLs * First cut of the MPI handle debugging interface. It is still evolving, but the interface is getting more stable. * Some minor bugs were fixed in the unity topo component (brought to light because of the new MPI handle debugging stuff). Fixes trac:1209. This commit was SVN r17730. The following Trac tickets were found above: Ticket 1209 --> https://svn.open-mpi.org/trac/ompi/ticket/1209
108 строки
3.3 KiB
C
108 строки
3.3 KiB
C
/*
|
|
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
|
|
* University Research and Technology
|
|
* Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2005 The University of Tennessee and The University
|
|
* of Tennessee Research Foundation. All rights
|
|
* reserved.
|
|
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
|
|
* University of Stuttgart. All rights reserved.
|
|
* Copyright (c) 2004-2005 The Regents of the University of California.
|
|
* All rights reserved.
|
|
* Copyright (c) 2008 Cisco Systems, Inc. All rights reserved.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
|
|
#include "ompi_config.h"
|
|
#include "ompi/mca/topo/base/base.h"
|
|
#include "ompi/communicator/communicator.h"
|
|
#include "ompi/mca/topo/topo.h"
|
|
|
|
/*
|
|
* function - Returns the shifted source and destination ranks, given a
|
|
* shift direction and amount
|
|
*
|
|
* @param comm communicator with cartesian structure (handle)
|
|
* @param direction coordinate directionension of shift (integer)
|
|
* @param disp displacement (> 0: upwards shift, < 0: downwards shift) (integer)
|
|
* @param rank_source rank of source process (integer)
|
|
* @param rank_dest rank of destination process (integer)
|
|
*
|
|
* The 'direction' argument is in the range '[0,n-1]' for an n-directionensional
|
|
* Cartesian mesh.
|
|
*
|
|
* @retval MPI_SUCCESS
|
|
* @retval MPI_ERR_TOPOLOGY
|
|
* @retval MPI_ERR_DIMS
|
|
* @retval MPI_ERR_COMM
|
|
* @retval MPI_ERR_ARG
|
|
*/
|
|
int mca_topo_base_cart_shift (MPI_Comm comm,
|
|
int direction,
|
|
int disp,
|
|
int *rank_source,
|
|
int *rank_dest){
|
|
int factor;
|
|
int thisdirection = 0;
|
|
int thisperiod = 0;
|
|
int ord;
|
|
int srcord;
|
|
int destord;
|
|
int i;
|
|
int *d, *q;
|
|
|
|
/*
|
|
* Handle the trivial case.
|
|
*/
|
|
ord = ompi_comm_rank(comm);
|
|
|
|
if (disp == 0) {
|
|
*rank_dest = *rank_source = ord;
|
|
return MPI_SUCCESS;
|
|
}
|
|
/*
|
|
* Compute the rank factor and ordinate.
|
|
*/
|
|
factor = ompi_comm_size(comm);
|
|
d = comm->c_topo_comm->mtc_dims_or_index;
|
|
q = comm->c_topo_comm->mtc_periods_or_edges;
|
|
for (i = 0; (i < comm->c_topo_comm->mtc_ndims_or_nnodes) && (i <= direction); ++i, ++d, ++q) {
|
|
thisdirection = *d;
|
|
thisperiod = *q;
|
|
|
|
ord %= factor;
|
|
factor /= thisdirection;
|
|
}
|
|
|
|
ord /= factor;
|
|
/*
|
|
* Check the displacement value and compute the new ranks.
|
|
*/
|
|
*rank_source = *rank_dest = MPI_UNDEFINED;
|
|
|
|
srcord = ord - disp;
|
|
destord = ord + disp;
|
|
if ( ((destord < 0) || (destord >= thisdirection)) && (!thisperiod) ) {
|
|
*rank_dest = MPI_PROC_NULL;
|
|
} else {
|
|
destord %= thisdirection;
|
|
if (destord < 0) destord += thisdirection;
|
|
*rank_dest = ompi_comm_rank(comm);
|
|
*rank_dest += ((destord - ord) * factor);
|
|
}
|
|
if ( ((srcord < 0) || (srcord >= thisdirection)) && (!thisperiod) ) {
|
|
*rank_source = MPI_PROC_NULL;
|
|
} else {
|
|
srcord %= thisdirection;
|
|
if (srcord < 0) srcord += thisdirection;
|
|
*rank_source= ompi_comm_rank(comm);
|
|
*rank_source += ((srcord - ord) * factor);
|
|
}
|
|
|
|
return MPI_SUCCESS;
|
|
}
|