cf377db823
Features: - Support for an override parameter file (openmpi-mca-param-override.conf). Variable values in this file can not be overridden by any file or environment value. - Support for boolean, unsigned, and unsigned long long variables. - Support for true/false values. - Support for enumerations on integer variables. - Support for MPIT scope, verbosity, and binding. - Support for command line source. - Support for setting variable source via the environment using OMPI_MCA_SOURCE_<var name>=source (either command or file:filename) - Cleaner API. - Support for variable groups (equivalent to MPIT categories). Notes: - Variables must be created with a backing store (char **, int *, or bool *) that must live at least as long as the variable. - Creating a variable with the MCA_BASE_VAR_FLAG_SETTABLE enables the use of mca_base_var_set_value() to change the value. - String values are duplicated when the variable is registered. It is up to the caller to free the original value if necessary. The new value will be freed by the mca_base_var system and must not be freed by the user. - Variables with constant scope may not be settable. - Variable groups (and all associated variables) are deregistered when the component is closed or the component repository item is freed. This prevents a segmentation fault from accessing a variable after its component is unloaded. - After some discussion we decided we should remove the automatic registration of component priority variables. Few component actually made use of this feature. - The enumerator interface was updated to be general enough to handle future uses of the interface. - The code to generate ompi_info output has been moved into the MCA variable system. See mca_base_var_dump(). opal: update core and components to mca_base_var system orte: update core and components to mca_base_var system ompi: update core and components to mca_base_var system This commit also modifies the rmaps framework. The following variables were moved from ppr and lama: rmaps_base_pernode, rmaps_base_n_pernode, rmaps_base_n_persocket. Both lama and ppr create synonyms for these variables. This commit was SVN r28236.
79 строки
2.8 KiB
C
79 строки
2.8 KiB
C
/*
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2004-2006 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2007 Los Alamos National Security, LLC. All rights
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* reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <stdlib.h>
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#include "ompi/constants.h"
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#include "ompi/mca/pml/pml.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/request/request.h"
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#include "ompi/runtime/mpiruntime.h"
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int
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ompi_init_preconnect_mpi(void)
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{
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int comm_size = ompi_comm_size(MPI_COMM_WORLD);
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int comm_rank = ompi_comm_rank(MPI_COMM_WORLD);
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int param, next, prev, i, ret = OMPI_SUCCESS;
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struct ompi_request_t * requests[2];
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char inbuf[1], outbuf[1];
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const bool *value;
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param = mca_base_var_find("ompi", "mpi", NULL, "preconnect_mpi");
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if (0 > param) return OMPI_SUCCESS;
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ret = mca_base_var_get_value(param, &value, NULL, NULL);
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if (OMPI_SUCCESS != ret || 0 == value[0]) {
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return OMPI_SUCCESS;
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}
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inbuf[0] = outbuf[0] = '\0';
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/* Each iteration, every process sends to its neighbor i hops to
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the right and receives from its neighbor i hops to the left.
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Because send_complete is used, there will only ever be one
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outstanding send and one outstanding receive in the network at
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a time for any given process. This limits any "flooding"
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effect that can occur with other connection algorithms. While
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the flooding algorithms may be a more efficient use of
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resources, they can overwhelm the out-of-band connection system
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used to wire up some networks, leading to poor performance and
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hangs. */
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for (i = 1 ; i <= comm_size / 2 ; ++i) {
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next = (comm_rank + i) % comm_size;
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prev = (comm_rank - i + comm_size) % comm_size;
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ret = MCA_PML_CALL(isend(outbuf, 1, MPI_CHAR,
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next, 1,
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MCA_PML_BASE_SEND_COMPLETE,
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MPI_COMM_WORLD,
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&requests[1]));
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if (OMPI_SUCCESS != ret) return ret;
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ret = MCA_PML_CALL(irecv(inbuf, 1, MPI_CHAR,
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prev, 1,
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MPI_COMM_WORLD,
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&requests[0]));
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if(OMPI_SUCCESS != ret) return ret;
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ret = ompi_request_wait_all(2, requests, MPI_STATUSES_IGNORE);
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if (OMPI_SUCCESS != ret) return ret;
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}
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return ret;
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}
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