557 строки
21 KiB
C
557 строки
21 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
|
|
/*
|
|
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
|
|
* University Research and Technology
|
|
* Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2014 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 Sun Microsystems, Inc. All rights reserved.
|
|
* Copyright (c) 2013 Los Alamos National Security, LLC. All Rights
|
|
* reserved.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
|
|
#include "ompi_config.h"
|
|
|
|
#include "mpi.h"
|
|
#include "opal/util/bit_ops.h"
|
|
#include "ompi/constants.h"
|
|
#include "ompi/communicator/communicator.h"
|
|
#include "ompi/mca/coll/coll.h"
|
|
#include "ompi/mca/coll/base/coll_tags.h"
|
|
#include "ompi/mca/pml/pml.h"
|
|
#include "coll_tuned.h"
|
|
#include "coll_tuned_topo.h"
|
|
#include "coll_tuned_util.h"
|
|
|
|
/* barrier algorithm variables */
|
|
static int coll_tuned_barrier_algorithm_count = 6;
|
|
static int coll_tuned_barrier_forced_algorithm = 0;
|
|
|
|
/* valid values for coll_tuned_barrier_forced_algorithm */
|
|
static mca_base_var_enum_value_t barrier_algorithms[] = {
|
|
{0, "ignore"},
|
|
{1, "linear"},
|
|
{2, "double_ring"},
|
|
{3, "recursive_doubling"},
|
|
{4, "bruck"},
|
|
{5, "two_proc"},
|
|
{6, "tree"},
|
|
{0, NULL}
|
|
};
|
|
|
|
/**
|
|
* A quick version of the MPI_Sendreceive implemented for the barrier.
|
|
* No actual data is moved across the wire, we use 0-byte messages to
|
|
* signal a two peer synchronization.
|
|
*/
|
|
static inline int
|
|
ompi_coll_tuned_sendrecv_zero(int dest, int stag,
|
|
int source, int rtag,
|
|
MPI_Comm comm)
|
|
|
|
{
|
|
int err, line = 0;
|
|
ompi_request_t* reqs[2];
|
|
ompi_status_public_t statuses[2];
|
|
|
|
/* post new irecv */
|
|
err = MCA_PML_CALL(irecv( NULL, 0, MPI_BYTE, source, rtag,
|
|
comm, &reqs[0]));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto error_handler; }
|
|
|
|
/* send data to children */
|
|
err = MCA_PML_CALL(isend( NULL, 0, MPI_BYTE, dest, stag,
|
|
MCA_PML_BASE_SEND_STANDARD, comm, &reqs[1]));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto error_handler; }
|
|
|
|
err = ompi_request_wait_all( 2, reqs, statuses );
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto error_handler; }
|
|
|
|
return (MPI_SUCCESS);
|
|
|
|
error_handler:
|
|
/* As we use wait_all we will get MPI_ERR_IN_STATUS which is not an error
|
|
* code that we can propagate up the stack. Instead, look for the real
|
|
* error code from the MPI_ERROR in the status.
|
|
*/
|
|
if( MPI_ERR_IN_STATUS == err ) {
|
|
/* At least we know the error was detected during the wait_all */
|
|
int err_index = 1;
|
|
if( MPI_SUCCESS == statuses[0].MPI_ERROR ) {
|
|
err_index = 0;
|
|
}
|
|
err = statuses[err_index].MPI_ERROR;
|
|
OPAL_OUTPUT ((ompi_coll_tuned_stream, "%s:%d: Error %d occurred in the %s"
|
|
" stage of ompi_coll_tuned_sendrecv_zero\n",
|
|
__FILE__, line, err, (0 == err_index ? "receive" : "send")));
|
|
} else {
|
|
/* Error discovered during the posting of the irecv or isend,
|
|
* and no status is available.
|
|
*/
|
|
OPAL_OUTPUT ((ompi_coll_tuned_stream, "%s:%d: Error %d occurred\n",
|
|
__FILE__, line, err));
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Barrier is ment to be a synchronous operation, as some BTLs can mark
|
|
* a request done before its passed to the NIC and progress might not be made
|
|
* elsewhere we cannot allow a process to exit the barrier until its last
|
|
* [round of] sends are completed.
|
|
*
|
|
* It is last round of sends rather than 'last' individual send as each pair of
|
|
* peers can use different channels/devices/btls and the receiver of one of
|
|
* these sends might be forced to wait as the sender
|
|
* leaves the collective and does not make progress until the next mpi call
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Simple double ring version of barrier
|
|
*
|
|
* synchronous gurantee made by last ring of sends are synchronous
|
|
*
|
|
*/
|
|
int ompi_coll_tuned_barrier_intra_doublering(struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int rank, size, err = 0, line = 0, left, right;
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
size = ompi_comm_size(comm);
|
|
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"ompi_coll_tuned_barrier_intra_doublering rank %d", rank));
|
|
|
|
left = ((rank-1)%size);
|
|
right = ((rank+1)%size);
|
|
|
|
if (rank > 0) { /* receive message from the left */
|
|
err = MCA_PML_CALL(recv((void*)NULL, 0, MPI_BYTE, left,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
|
|
}
|
|
|
|
/* Send message to the right */
|
|
err = MCA_PML_CALL(send((void*)NULL, 0, MPI_BYTE, right,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
MCA_PML_BASE_SEND_STANDARD, comm));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
|
|
|
|
/* root needs to receive from the last node */
|
|
if (rank == 0) {
|
|
err = MCA_PML_CALL(recv((void*)NULL, 0, MPI_BYTE, left,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
|
|
}
|
|
|
|
/* Allow nodes to exit */
|
|
if (rank > 0) { /* post Receive from left */
|
|
err = MCA_PML_CALL(recv((void*)NULL, 0, MPI_BYTE, left,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
|
|
}
|
|
|
|
/* send message to the right one */
|
|
err = MCA_PML_CALL(send((void*)NULL, 0, MPI_BYTE, right,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
MCA_PML_BASE_SEND_SYNCHRONOUS, comm));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
|
|
|
|
/* rank 0 post receive from the last node */
|
|
if (rank == 0) {
|
|
err = MCA_PML_CALL(recv((void*)NULL, 0, MPI_BYTE, left,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
|
|
}
|
|
|
|
return MPI_SUCCESS;
|
|
|
|
err_hndl:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"%s:%4d\tError occurred %d, rank %2d",
|
|
__FILE__, line, err, rank));
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* To make synchronous, uses sync sends and sync sendrecvs
|
|
*/
|
|
|
|
int ompi_coll_tuned_barrier_intra_recursivedoubling(struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int rank, size, adjsize, err, line, mask, remote;
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
size = ompi_comm_size(comm);
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,
|
|
"ompi_coll_tuned_barrier_intra_recursivedoubling rank %d",
|
|
rank));
|
|
|
|
/* do nearest power of 2 less than size calc */
|
|
adjsize = opal_next_poweroftwo(size);
|
|
adjsize >>= 1;
|
|
|
|
/* if size is not exact power of two, perform an extra step */
|
|
if (adjsize != size) {
|
|
if (rank >= adjsize) {
|
|
/* send message to lower ranked node */
|
|
remote = rank - adjsize;
|
|
err = ompi_coll_tuned_sendrecv_zero(remote, MCA_COLL_BASE_TAG_BARRIER,
|
|
remote, MCA_COLL_BASE_TAG_BARRIER,
|
|
comm);
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl;}
|
|
|
|
} else if (rank < (size - adjsize)) {
|
|
|
|
/* receive message from high level rank */
|
|
err = MCA_PML_CALL(recv((void*)NULL, 0, MPI_BYTE, rank+adjsize,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
MPI_STATUS_IGNORE));
|
|
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl;}
|
|
}
|
|
}
|
|
|
|
/* exchange messages */
|
|
if ( rank < adjsize ) {
|
|
mask = 0x1;
|
|
while ( mask < adjsize ) {
|
|
remote = rank ^ mask;
|
|
mask <<= 1;
|
|
if (remote >= adjsize) continue;
|
|
|
|
/* post receive from the remote node */
|
|
err = ompi_coll_tuned_sendrecv_zero(remote, MCA_COLL_BASE_TAG_BARRIER,
|
|
remote, MCA_COLL_BASE_TAG_BARRIER,
|
|
comm);
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl;}
|
|
}
|
|
}
|
|
|
|
/* non-power of 2 case */
|
|
if (adjsize != size) {
|
|
if (rank < (size - adjsize)) {
|
|
/* send enter message to higher ranked node */
|
|
remote = rank + adjsize;
|
|
err = MCA_PML_CALL(send((void*)NULL, 0, MPI_BYTE, remote,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
MCA_PML_BASE_SEND_SYNCHRONOUS, comm));
|
|
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl;}
|
|
}
|
|
}
|
|
|
|
return MPI_SUCCESS;
|
|
|
|
err_hndl:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"%s:%4d\tError occurred %d, rank %2d",
|
|
__FILE__, line, err, rank));
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* To make synchronous, uses sync sends and sync sendrecvs
|
|
*/
|
|
|
|
int ompi_coll_tuned_barrier_intra_bruck(struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int rank, size, distance, to, from, err, line = 0;
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
size = ompi_comm_size(comm);
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,
|
|
"ompi_coll_tuned_barrier_intra_bruck rank %d", rank));
|
|
|
|
/* exchange data with rank-2^k and rank+2^k */
|
|
for (distance = 1; distance < size; distance <<= 1) {
|
|
from = (rank + size - distance) % size;
|
|
to = (rank + distance) % size;
|
|
|
|
/* send message to lower ranked node */
|
|
err = ompi_coll_tuned_sendrecv_zero(to, MCA_COLL_BASE_TAG_BARRIER,
|
|
from, MCA_COLL_BASE_TAG_BARRIER,
|
|
comm);
|
|
if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl;}
|
|
}
|
|
|
|
return MPI_SUCCESS;
|
|
|
|
err_hndl:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"%s:%4d\tError occurred %d, rank %2d",
|
|
__FILE__, line, err, rank));
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* To make synchronous, uses sync sends and sync sendrecvs
|
|
*/
|
|
/* special case for two processes */
|
|
int ompi_coll_tuned_barrier_intra_two_procs(struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int remote, err;
|
|
|
|
remote = ompi_comm_rank(comm);
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,
|
|
"ompi_coll_tuned_barrier_intra_two_procs rank %d", remote));
|
|
remote = (remote + 1) & 0x1;
|
|
|
|
err = ompi_coll_tuned_sendrecv_zero(remote, MCA_COLL_BASE_TAG_BARRIER,
|
|
remote, MCA_COLL_BASE_TAG_BARRIER,
|
|
comm);
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Linear functions are copied from the BASIC coll module
|
|
* they do not segment the message and are simple implementations
|
|
* but for some small number of nodes and/or small data sizes they
|
|
* are just as fast as tuned/tree based segmenting operations
|
|
* and as such may be selected by the decision functions
|
|
* These are copied into this module due to the way we select modules
|
|
* in V1. i.e. in V2 we will handle this differently and so will not
|
|
* have to duplicate code.
|
|
* GEF Oct05 after asking Jeff.
|
|
*/
|
|
|
|
/* copied function (with appropriate renaming) starts here */
|
|
|
|
static int ompi_coll_tuned_barrier_intra_basic_linear(struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int i, err, rank, size;
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
size = ompi_comm_size(comm);
|
|
|
|
/* All non-root send & receive zero-length message. */
|
|
if (rank > 0) {
|
|
err = MCA_PML_CALL(send (NULL, 0, MPI_BYTE, 0,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
MCA_PML_BASE_SEND_STANDARD, comm));
|
|
if (MPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
|
|
err = MCA_PML_CALL(recv (NULL, 0, MPI_BYTE, 0,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
comm, MPI_STATUS_IGNORE));
|
|
if (MPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/* The root collects and broadcasts the messages. */
|
|
|
|
else {
|
|
ompi_request_t** requests;
|
|
|
|
requests = (ompi_request_t**)malloc( size * sizeof(ompi_request_t*) );
|
|
for (i = 1; i < size; ++i) {
|
|
err = MCA_PML_CALL(irecv(NULL, 0, MPI_BYTE, MPI_ANY_SOURCE,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
&(requests[i])));
|
|
if (MPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
}
|
|
ompi_request_wait_all( size-1, requests+1, MPI_STATUSES_IGNORE );
|
|
|
|
for (i = 1; i < size; ++i) {
|
|
err = MCA_PML_CALL(isend(NULL, 0, MPI_BYTE, i,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
MCA_PML_BASE_SEND_STANDARD, comm,
|
|
&(requests[i])));
|
|
if (MPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
}
|
|
ompi_request_wait_all( size-1, requests+1, MPI_STATUSES_IGNORE );
|
|
free( requests );
|
|
}
|
|
|
|
/* All done */
|
|
|
|
return MPI_SUCCESS;
|
|
|
|
}
|
|
/* copied function (with appropriate renaming) ends here */
|
|
|
|
/*
|
|
* Another recursive doubling type algorithm, but in this case
|
|
* we go up the tree and back down the tree.
|
|
*/
|
|
int ompi_coll_tuned_barrier_intra_tree(struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int rank, size, depth, err, jump, partner;
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
size = ompi_comm_size(comm);
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,
|
|
"ompi_coll_tuned_barrier_intra_tree %d",
|
|
rank));
|
|
|
|
/* Find the nearest power of 2 of the communicator size. */
|
|
depth = opal_next_poweroftwo_inclusive(size);
|
|
|
|
for (jump=1; jump<depth; jump<<=1) {
|
|
partner = rank ^ jump;
|
|
if (!(partner & (jump-1)) && partner < size) {
|
|
if (partner > rank) {
|
|
err = MCA_PML_CALL(recv (NULL, 0, MPI_BYTE, partner,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (MPI_SUCCESS != err)
|
|
return err;
|
|
} else if (partner < rank) {
|
|
err = MCA_PML_CALL(send (NULL, 0, MPI_BYTE, partner,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
MCA_PML_BASE_SEND_STANDARD, comm));
|
|
if (MPI_SUCCESS != err)
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
|
|
depth >>= 1;
|
|
for (jump = depth; jump>0; jump>>=1) {
|
|
partner = rank ^ jump;
|
|
if (!(partner & (jump-1)) && partner < size) {
|
|
if (partner > rank) {
|
|
err = MCA_PML_CALL(send (NULL, 0, MPI_BYTE, partner,
|
|
MCA_COLL_BASE_TAG_BARRIER,
|
|
MCA_PML_BASE_SEND_STANDARD, comm));
|
|
if (MPI_SUCCESS != err)
|
|
return err;
|
|
} else if (partner < rank) {
|
|
err = MCA_PML_CALL(recv (NULL, 0, MPI_BYTE, partner,
|
|
MCA_COLL_BASE_TAG_BARRIER, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (MPI_SUCCESS != err)
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
|
|
return MPI_SUCCESS;
|
|
}
|
|
|
|
|
|
/* The following are used by dynamic and forced rules */
|
|
|
|
/* publish details of each algorithm and if its forced/fixed/locked in */
|
|
/* as you add methods/algorithms you must update this and the query/map */
|
|
/* routines */
|
|
|
|
/* this routine is called by the component only */
|
|
/* this makes sure that the mca parameters are set to their initial values */
|
|
/* and perms */
|
|
/* module does not call this they call the forced_getvalues routine instead */
|
|
|
|
int ompi_coll_tuned_barrier_intra_check_forced_init (coll_tuned_force_algorithm_mca_param_indices_t *mca_param_indices)
|
|
{
|
|
mca_base_var_enum_t *new_enum;
|
|
|
|
ompi_coll_tuned_forced_max_algorithms[BARRIER] = coll_tuned_barrier_algorithm_count;
|
|
|
|
(void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
|
|
"barrier_algorithm_count",
|
|
"Number of barrier algorithms available",
|
|
MCA_BASE_VAR_TYPE_INT, NULL, 0,
|
|
MCA_BASE_VAR_FLAG_DEFAULT_ONLY,
|
|
OPAL_INFO_LVL_5,
|
|
MCA_BASE_VAR_SCOPE_CONSTANT,
|
|
&coll_tuned_barrier_algorithm_count);
|
|
|
|
/* MPI_T: This variable should eventually be bound to a communicator */
|
|
coll_tuned_barrier_forced_algorithm = 0;
|
|
(void) mca_base_var_enum_create("coll_tuned_barrier_algorithms", barrier_algorithms, &new_enum);
|
|
mca_param_indices->algorithm_param_index =
|
|
mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
|
|
"barrier_algorithm",
|
|
"Which barrier algorithm is used. Can be locked down to choice of: 0 ignore, 1 linear, 2 double ring, 3: recursive doubling 4: bruck, 5: two proc only, 6: tree",
|
|
MCA_BASE_VAR_TYPE_INT, new_enum, 0, 0,
|
|
OPAL_INFO_LVL_5,
|
|
MCA_BASE_VAR_SCOPE_READONLY,
|
|
&coll_tuned_barrier_forced_algorithm);
|
|
OBJ_RELEASE(new_enum);
|
|
if (mca_param_indices->algorithm_param_index < 0) {
|
|
return mca_param_indices->algorithm_param_index;
|
|
}
|
|
|
|
return (MPI_SUCCESS);
|
|
}
|
|
|
|
|
|
|
|
int ompi_coll_tuned_barrier_intra_do_forced(struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
mca_coll_tuned_module_t *tuned_module = (mca_coll_tuned_module_t*) module;
|
|
mca_coll_tuned_comm_t *data = tuned_module->tuned_data;
|
|
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,
|
|
"coll:tuned:barrier_intra_do_forced selected algorithm %d",
|
|
data->user_forced[BARRIER].algorithm));
|
|
|
|
switch (data->user_forced[BARRIER].algorithm) {
|
|
case (0): return ompi_coll_tuned_barrier_intra_dec_fixed (comm, module);
|
|
case (1): return ompi_coll_tuned_barrier_intra_basic_linear (comm, module);
|
|
case (2): return ompi_coll_tuned_barrier_intra_doublering (comm, module);
|
|
case (3): return ompi_coll_tuned_barrier_intra_recursivedoubling (comm, module);
|
|
case (4): return ompi_coll_tuned_barrier_intra_bruck (comm, module);
|
|
case (5): return ompi_coll_tuned_barrier_intra_two_procs (comm, module);
|
|
case (6): return ompi_coll_tuned_barrier_intra_tree (comm, module);
|
|
default:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:barrier_intra_do_forced attempt to select algorithm %d when only 0-%d is valid?",
|
|
data->user_forced[BARRIER].algorithm,
|
|
ompi_coll_tuned_forced_max_algorithms[BARRIER]));
|
|
return (MPI_ERR_ARG);
|
|
} /* switch */
|
|
|
|
}
|
|
|
|
|
|
int ompi_coll_tuned_barrier_intra_do_this (struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module,
|
|
int algorithm, int faninout, int segsize)
|
|
{
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:barrier_intra_do_this selected algorithm %d topo fanin/out%d", algorithm, faninout));
|
|
|
|
switch (algorithm) {
|
|
case (0): return ompi_coll_tuned_barrier_intra_dec_fixed (comm, module);
|
|
case (1): return ompi_coll_tuned_barrier_intra_basic_linear (comm, module);
|
|
case (2): return ompi_coll_tuned_barrier_intra_doublering (comm, module);
|
|
case (3): return ompi_coll_tuned_barrier_intra_recursivedoubling (comm, module);
|
|
case (4): return ompi_coll_tuned_barrier_intra_bruck (comm, module);
|
|
case (5): return ompi_coll_tuned_barrier_intra_two_procs (comm, module);
|
|
case (6): return ompi_coll_tuned_barrier_intra_tree (comm, module);
|
|
default:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:barrier_intra_do_this attempt to select algorithm %d when only 0-%d is valid?",
|
|
algorithm, ompi_coll_tuned_forced_max_algorithms[BARRIER]));
|
|
return (MPI_ERR_ARG);
|
|
} /* switch */
|
|
}
|
|
|