9780a000ba
- fixing line lengths and some of the comments - possible bug fix (but I do not think we exposed it in any tests so far) temporary buffers were allocated as multiples of extent instead of true_extent + (count -1) * extent. Everything is still passing Intel tests over tcp and btl mx up to 64 nodes. This commit was SVN r13956.
751 строка
33 KiB
C
751 строка
33 KiB
C
/*
|
|
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
|
|
* University Research and Technology
|
|
* Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2006 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.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
|
|
#include "ompi_config.h"
|
|
|
|
#include "mpi.h"
|
|
#include "ompi/constants.h"
|
|
#include "ompi/datatype/datatype.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 "ompi/op/op.h"
|
|
#include "coll_tuned.h"
|
|
#include "coll_tuned_topo.h"
|
|
|
|
/**
|
|
* This is a generic implementation of the reduce protocol. It used the tree
|
|
* provided as an argument and execute all operations using a segment of
|
|
* count times a datatype.
|
|
* For the last communication it will update the count in order to limit
|
|
* the number of datatype to the original count (original_count)
|
|
*
|
|
* Note that for non-commutative operations we cannot save memory copy
|
|
* for the first block: thus we must copy sendbuf to accumbuf on intermediate
|
|
* to keep the optimized loop happy.
|
|
*/
|
|
int ompi_coll_tuned_reduce_generic( void* sendbuf, void* recvbuf, int original_count,
|
|
ompi_datatype_t* datatype, ompi_op_t* op,
|
|
int root, ompi_communicator_t* comm,
|
|
ompi_coll_tree_t* tree, int count_by_segment )
|
|
{
|
|
char *inbuf[2] = {NULL, NULL}, *inbuf_free[2] = {NULL, NULL};
|
|
char *accumbuf = NULL, *accumbuf_free = NULL;
|
|
char *local_op_buffer = NULL, *sendtmpbuf = NULL;
|
|
ptrdiff_t extent, lower_bound, segment_increment;
|
|
size_t typelng;
|
|
ompi_request_t* reqs[2] = {MPI_REQUEST_NULL, MPI_REQUEST_NULL};
|
|
int num_segments, line, ret, segindex, i, rank;
|
|
int recvcount, prevcount, inbi;
|
|
|
|
/**
|
|
* Determine number of segments and number of elements
|
|
* sent per operation
|
|
*/
|
|
ompi_ddt_get_extent( datatype, &lower_bound, &extent );
|
|
ompi_ddt_type_size( datatype, &typelng );
|
|
num_segments = (original_count + count_by_segment - 1) / count_by_segment;
|
|
segment_increment = count_by_segment * extent;
|
|
|
|
sendtmpbuf = (char*) sendbuf;
|
|
if( sendbuf == MPI_IN_PLACE ) {
|
|
sendtmpbuf = (char *)recvbuf;
|
|
}
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
|
|
/* non-leaf nodes - wait for children to send me data & forward up
|
|
(if needed) */
|
|
if( tree->tree_nextsize > 0 ) {
|
|
ptrdiff_t true_lower_bound, true_extent, real_segment_size;
|
|
ompi_ddt_get_true_extent( datatype, &true_lower_bound,
|
|
&true_extent );
|
|
|
|
/* handle non existant recv buffer (i.e. its NULL) and
|
|
protect the recv buffer on non-root nodes */
|
|
accumbuf = (char*)recvbuf;
|
|
if( (NULL == accumbuf) || (root != rank) ) {
|
|
/* Allocate temporary accumulator buffer. */
|
|
accumbuf_free = (char*)malloc(true_extent +
|
|
(original_count - 1) * extent);
|
|
if (accumbuf_free == NULL) {
|
|
line = __LINE__; ret = -1; goto error_hndl;
|
|
}
|
|
accumbuf = accumbuf_free - lower_bound;
|
|
}
|
|
|
|
/* If this is a non-commutative operation we must copy
|
|
sendbuf to the accumbuf, in order to simplfy the loops */
|
|
if (!ompi_op_is_commute(op)) {
|
|
ompi_ddt_copy_content_same_ddt(datatype, original_count,
|
|
(char*)accumbuf,
|
|
(char*)sendtmpbuf);
|
|
}
|
|
/* Allocate two buffers for incoming segments */
|
|
real_segment_size = true_extent + (count_by_segment - 1) * extent;
|
|
inbuf_free[0] = (char*) malloc(real_segment_size);
|
|
if( inbuf_free[0] == NULL ) {
|
|
line = __LINE__; ret = -1; goto error_hndl;
|
|
}
|
|
inbuf[0] = inbuf_free[0] - lower_bound;
|
|
/* if there is chance to overlap communication -
|
|
allocate second buffer */
|
|
if( (num_segments > 1) || (tree->tree_nextsize > 1) ) {
|
|
inbuf_free[1] = (char*) malloc(real_segment_size);
|
|
if( inbuf_free[1] == NULL ) {
|
|
line = __LINE__; ret = -1; goto error_hndl;
|
|
}
|
|
inbuf[1] = inbuf_free[1] - lower_bound;
|
|
}
|
|
|
|
/* reset input buffer index and receive count */
|
|
inbi = 0;
|
|
recvcount = 0;
|
|
/* for each segment */
|
|
for( segindex = 0; segindex <= num_segments; segindex++ ) {
|
|
prevcount = recvcount;
|
|
/* recvcount - number of elements in current segment */
|
|
recvcount = count_by_segment;
|
|
if( segindex == (num_segments-1) )
|
|
recvcount = original_count - count_by_segment * segindex;
|
|
|
|
/* for each child */
|
|
for( i = 0; i < tree->tree_nextsize; i++ ) {
|
|
/**
|
|
* We try to overlap communication:
|
|
* either with next segment or with the next child
|
|
*/
|
|
/* post irecv for current segindex on current child */
|
|
if( segindex < num_segments ) {
|
|
void* local_recvbuf = inbuf[inbi];
|
|
if( 0 == i ) {
|
|
/* for the first step (1st child per segment) and
|
|
* commutative operations we might be able to irecv
|
|
* directly into the accumulate buffer so that we can
|
|
* reduce(op) this with our sendbuf in one step as
|
|
* ompi_op_reduce only has two buffer pointers,
|
|
* this avoids an extra memory copy.
|
|
*
|
|
* BUT if the operation is non-commutative or
|
|
* we are root and are USING MPI_IN_PLACE this is wrong!
|
|
*/
|
|
if( (ompi_op_is_commute(op)) &&
|
|
!((MPI_IN_PLACE == sendbuf) && (rank == tree->tree_root)) ) {
|
|
local_recvbuf = accumbuf + segindex * segment_increment;
|
|
}
|
|
}
|
|
|
|
ret = MCA_PML_CALL(irecv(local_recvbuf, recvcount, datatype,
|
|
tree->tree_next[i],
|
|
MCA_COLL_BASE_TAG_REDUCE, comm,
|
|
&reqs[inbi]));
|
|
if (ret != MPI_SUCCESS) { line = __LINE__; goto error_hndl;}
|
|
}
|
|
/* wait for previous req to complete, if any.
|
|
if there are no requests reqs[inbi ^1] will be
|
|
MPI_REQUEST_NULL. */
|
|
/* wait on data from last child for previous segment */
|
|
ret = ompi_request_wait_all( 1, &reqs[inbi ^ 1],
|
|
MPI_STATUSES_IGNORE );
|
|
if (ret != MPI_SUCCESS) { line = __LINE__; goto error_hndl; }
|
|
local_op_buffer = inbuf[inbi ^ 1];
|
|
if( i > 0 ) {
|
|
/* our first operation is to combine our own [sendbuf] data
|
|
* with the data we recvd from down stream (but only
|
|
* the operation is commutative and if we are not root and
|
|
* not using MPI_IN_PLACE)
|
|
*/
|
|
if( 1 == i ) {
|
|
if( (ompi_op_is_commute(op)) &&
|
|
!((MPI_IN_PLACE == sendbuf) && (rank == tree->tree_root)) ) {
|
|
local_op_buffer = sendtmpbuf + segindex * segment_increment;
|
|
}
|
|
}
|
|
/* apply operation */
|
|
ompi_op_reduce(op, local_op_buffer,
|
|
accumbuf + segindex * segment_increment,
|
|
recvcount, datatype );
|
|
} else if ( segindex > 0 ) {
|
|
void* accumulator = accumbuf + (segindex-1) * segment_increment;
|
|
if( tree->tree_nextsize <= 1 ) {
|
|
if( (ompi_op_is_commute(op)) &&
|
|
!((MPI_IN_PLACE == sendbuf) && (rank == tree->tree_root)) ) {
|
|
local_op_buffer = sendtmpbuf + (segindex-1) * segment_increment;
|
|
}
|
|
}
|
|
ompi_op_reduce(op, local_op_buffer, accumulator, prevcount,
|
|
datatype );
|
|
|
|
/* all reduced on available data this step (i) complete,
|
|
* pass to the next process unless you are the root.
|
|
*/
|
|
if (rank != tree->tree_root) {
|
|
/* send combined/accumulated data to parent */
|
|
ret = MCA_PML_CALL( send( accumulator, prevcount,
|
|
datatype, tree->tree_prev,
|
|
MCA_COLL_BASE_TAG_REDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD,
|
|
comm) );
|
|
if (ret != MPI_SUCCESS) {
|
|
line = __LINE__; goto error_hndl;
|
|
}
|
|
}
|
|
|
|
/* we stop when segindex = number of segments
|
|
(i.e. we do num_segment+1 steps for pipelining */
|
|
if (segindex == num_segments) break;
|
|
}
|
|
|
|
/* update input buffer index */
|
|
inbi = inbi ^ 1;
|
|
} /* end of for each child */
|
|
} /* end of for each segment */
|
|
|
|
/* clean up */
|
|
if( inbuf_free[0] != NULL) free(inbuf_free[0]);
|
|
if( inbuf_free[1] != NULL) free(inbuf_free[1]);
|
|
if( accumbuf_free != NULL ) free(accumbuf_free);
|
|
}
|
|
|
|
/* leaf nodes */
|
|
else {
|
|
/* Send segmented data to parents */
|
|
segindex = 0;
|
|
while( original_count > 0 ) {
|
|
if( original_count < count_by_segment ) {
|
|
count_by_segment = original_count;
|
|
}
|
|
ret = MCA_PML_CALL( send((char*)sendbuf +
|
|
segindex * segment_increment,
|
|
count_by_segment, datatype,
|
|
tree->tree_prev, MCA_COLL_BASE_TAG_REDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD, comm) );
|
|
if (ret != MPI_SUCCESS) { line = __LINE__; goto error_hndl; }
|
|
segindex++;
|
|
original_count -= count_by_segment;
|
|
}
|
|
}
|
|
return OMPI_SUCCESS;
|
|
|
|
error_hndl: /* error handler */
|
|
OPAL_OUTPUT (( ompi_coll_tuned_stream,
|
|
"ERROR_HNDL: node %d file %s line %d error %d\n",
|
|
rank, __FILE__, line, ret ));
|
|
if( inbuf_free[0] != NULL ) free(inbuf_free[0]);
|
|
if( inbuf_free[1] != NULL ) free(inbuf_free[1]);
|
|
if( accumbuf_free != NULL ) free(accumbuf);
|
|
return ret;
|
|
}
|
|
|
|
/* Attention: this version of the reduce operations does not
|
|
work for:
|
|
- non-commutative operations
|
|
- segment sizes which are not multiplies of the extent of the datatype
|
|
meaning that at least one datatype must fit in the segment !
|
|
*/
|
|
|
|
int ompi_coll_tuned_reduce_intra_chain( void *sendbuf, void *recvbuf, int count,
|
|
ompi_datatype_t* datatype,
|
|
ompi_op_t* op, int root,
|
|
ompi_communicator_t* comm,
|
|
uint32_t segsize, int fanout)
|
|
{
|
|
int segcount = count;
|
|
size_t typelng;
|
|
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_chain rank %d fo %d ss %5d", ompi_comm_rank(comm), fanout, segsize));
|
|
|
|
COLL_TUNED_UPDATE_CHAIN( comm, root, fanout );
|
|
/**
|
|
* Determine number of segments and number of elements
|
|
* sent per operation
|
|
*/
|
|
ompi_ddt_type_size( datatype, &typelng );
|
|
COLL_TUNED_COMPUTED_SEGCOUNT( segsize, typelng, segcount );
|
|
|
|
return ompi_coll_tuned_reduce_generic( sendbuf, recvbuf, count, datatype,
|
|
op, root, comm,
|
|
comm->c_coll_selected_data->cached_chain,
|
|
segcount );
|
|
}
|
|
|
|
|
|
int ompi_coll_tuned_reduce_intra_pipeline( void *sendbuf, void *recvbuf,
|
|
int count, ompi_datatype_t* datatype,
|
|
ompi_op_t* op, int root,
|
|
ompi_communicator_t* comm,
|
|
uint32_t segsize )
|
|
{
|
|
int segcount = count;
|
|
size_t typelng;
|
|
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_pipeline rank %d ss %5d",
|
|
ompi_comm_rank(comm), segsize));
|
|
|
|
COLL_TUNED_UPDATE_PIPELINE( comm, root );
|
|
|
|
/**
|
|
* Determine number of segments and number of elements
|
|
* sent per operation
|
|
*/
|
|
ompi_ddt_type_size( datatype, &typelng );
|
|
COLL_TUNED_COMPUTED_SEGCOUNT( segsize, typelng, segcount );
|
|
|
|
return ompi_coll_tuned_reduce_generic( sendbuf, recvbuf, count, datatype,
|
|
op, root, comm,
|
|
comm->c_coll_selected_data->cached_pipeline,
|
|
segcount );
|
|
}
|
|
|
|
int ompi_coll_tuned_reduce_intra_binary( void *sendbuf, void *recvbuf,
|
|
int count, ompi_datatype_t* datatype,
|
|
ompi_op_t* op, int root,
|
|
ompi_communicator_t* comm,
|
|
uint32_t segsize )
|
|
{
|
|
int segcount = count;
|
|
size_t typelng;
|
|
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_binary rank %d ss %5d",
|
|
ompi_comm_rank(comm), segsize));
|
|
|
|
COLL_TUNED_UPDATE_BINTREE( comm, root );
|
|
|
|
/**
|
|
* Determine number of segments and number of elements
|
|
* sent per operation
|
|
*/
|
|
ompi_ddt_type_size( datatype, &typelng );
|
|
COLL_TUNED_COMPUTED_SEGCOUNT( segsize, typelng, segcount );
|
|
|
|
return ompi_coll_tuned_reduce_generic( sendbuf, recvbuf, count, datatype,
|
|
op, root, comm,
|
|
comm->c_coll_selected_data->cached_bintree,
|
|
segcount );
|
|
}
|
|
|
|
int ompi_coll_tuned_reduce_intra_binomial( void *sendbuf, void *recvbuf,
|
|
int count, ompi_datatype_t* datatype,
|
|
ompi_op_t* op, int root,
|
|
ompi_communicator_t* comm,
|
|
uint32_t segsize )
|
|
{
|
|
int segcount = count;
|
|
size_t typelng;
|
|
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_binomial rank %d ss %5d",
|
|
ompi_comm_rank(comm), segsize));
|
|
|
|
COLL_TUNED_UPDATE_BMTREE( comm, root );
|
|
|
|
/**
|
|
* Determine number of segments and number of elements
|
|
* sent per operation
|
|
*/
|
|
ompi_ddt_type_size( datatype, &typelng );
|
|
COLL_TUNED_COMPUTED_SEGCOUNT( segsize, typelng, segcount );
|
|
|
|
return ompi_coll_tuned_reduce_generic( sendbuf, recvbuf, count, datatype,
|
|
op, root, comm,
|
|
comm->c_coll_selected_data->cached_bmtree,
|
|
segcount );
|
|
}
|
|
|
|
/*
|
|
* reduce_intra_in_order_binary
|
|
*
|
|
* Function: Logarithmic reduce operation for non-commutative operations.
|
|
* Acecpts: same as MPI_Reduce()
|
|
* Returns: MPI_SUCCESS or error code
|
|
*/
|
|
int ompi_coll_tuned_reduce_intra_in_order_binary( void *sendbuf, void *recvbuf,
|
|
int count,
|
|
ompi_datatype_t* datatype,
|
|
ompi_op_t* op, int root,
|
|
ompi_communicator_t* comm,
|
|
uint32_t segsize )
|
|
{
|
|
int ret;
|
|
int rank, size, io_root;
|
|
int segcount = count;
|
|
void *use_this_sendbuf = NULL, *use_this_recvbuf = NULL;
|
|
size_t typelng;
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
size = ompi_comm_size(comm);
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_in_order_binary rank %d ss %5d",
|
|
rank, segsize));
|
|
|
|
COLL_TUNED_UPDATE_IN_ORDER_BINTREE( comm );
|
|
|
|
/**
|
|
* Determine number of segments and number of elements
|
|
* sent per operation
|
|
*/
|
|
ompi_ddt_type_size( datatype, &typelng );
|
|
COLL_TUNED_COMPUTED_SEGCOUNT( segsize, typelng, segcount );
|
|
|
|
/* An in-order binary tree must use root (size-1) to preserve the order of
|
|
operations. Thus, if root is not rank (size - 1), then we must handle
|
|
1. MPI_IN_PLACE option on real root, and
|
|
2. we must allocate temporary recvbuf on rank (size - 1).
|
|
Note that generic function must be careful not to switch order of
|
|
operations for non-commutative ops.
|
|
*/
|
|
io_root = size - 1;
|
|
use_this_sendbuf = sendbuf;
|
|
use_this_recvbuf = recvbuf;
|
|
if (io_root != root) {
|
|
ptrdiff_t tlb, text, lb, ext;
|
|
char *tmpbuf = NULL;
|
|
|
|
ompi_ddt_get_extent(datatype, &lb, &ext);
|
|
ompi_ddt_get_true_extent(datatype, &tlb, &text);
|
|
|
|
if ((root == rank) && (MPI_IN_PLACE == sendbuf)) {
|
|
tmpbuf = malloc(text + (count - 1) * ext);
|
|
if (NULL == tmpbuf) {
|
|
return MPI_ERR_INTERN;
|
|
}
|
|
ompi_ddt_copy_content_same_ddt(datatype, count,
|
|
(char*)tmpbuf,
|
|
(char*)recvbuf);
|
|
use_this_sendbuf = tmpbuf;
|
|
} else if (io_root == rank) {
|
|
tmpbuf = malloc(text + (count - 1) * ext);
|
|
if (NULL == tmpbuf) {
|
|
return MPI_ERR_INTERN;
|
|
}
|
|
use_this_recvbuf = tmpbuf;
|
|
}
|
|
}
|
|
|
|
/* Use generic reduce with in-order binary tree topology and io_root */
|
|
ret = ompi_coll_tuned_reduce_generic( use_this_sendbuf, use_this_recvbuf,
|
|
count, datatype, op, io_root, comm,
|
|
comm->c_coll_selected_data->cached_in_order_bintree,
|
|
segcount );
|
|
if (MPI_SUCCESS != ret) { return ret; }
|
|
|
|
/* Clean up */
|
|
if (io_root != root) {
|
|
if (root == rank) {
|
|
/* Receive result from rank io_root to recvbuf */
|
|
ret = MCA_PML_CALL(recv(recvbuf, count, datatype, io_root,
|
|
MCA_COLL_BASE_TAG_REDUCE, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (MPI_SUCCESS != ret) { return ret; }
|
|
if (MPI_IN_PLACE == sendbuf) {
|
|
free(use_this_sendbuf);
|
|
}
|
|
|
|
} else if (io_root == rank) {
|
|
/* Send result from use_this_recvbuf to root */
|
|
ret = MCA_PML_CALL(send(use_this_recvbuf, count, datatype, root,
|
|
MCA_COLL_BASE_TAG_REDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD, comm));
|
|
if (MPI_SUCCESS != ret) { return ret; }
|
|
free(use_this_recvbuf);
|
|
}
|
|
}
|
|
|
|
return MPI_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
/*
|
|
* reduce_lin_intra
|
|
*
|
|
* Function: - reduction using O(N) algorithm
|
|
* Accepts: - same as MPI_Reduce()
|
|
* Returns: - MPI_SUCCESS or error code
|
|
*/
|
|
int
|
|
ompi_coll_tuned_reduce_intra_basic_linear(void *sbuf, void *rbuf, int count,
|
|
struct ompi_datatype_t *dtype,
|
|
struct ompi_op_t *op,
|
|
int root, struct ompi_communicator_t *comm)
|
|
{
|
|
int i, rank, err, size;
|
|
ptrdiff_t true_lb, true_extent, lb, extent;
|
|
char *free_buffer = NULL;
|
|
char *pml_buffer = NULL;
|
|
char *inplace_temp = NULL;
|
|
char *inbuf;
|
|
|
|
/* Initialize */
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
size = ompi_comm_size(comm);
|
|
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_basic_linear rank %d", rank));
|
|
|
|
/* If not root, send data to the root. */
|
|
|
|
if (rank != root) {
|
|
err = MCA_PML_CALL(send(sbuf, count, dtype, root,
|
|
MCA_COLL_BASE_TAG_REDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD, comm));
|
|
return err;
|
|
}
|
|
|
|
/* see discussion in ompi_coll_basic_reduce_lin_intra about
|
|
extent and true extent */
|
|
/* for reducing buffer allocation lengths.... */
|
|
|
|
ompi_ddt_get_extent(dtype, &lb, &extent);
|
|
ompi_ddt_get_true_extent(dtype, &true_lb, &true_extent);
|
|
|
|
if (MPI_IN_PLACE == sbuf) {
|
|
sbuf = rbuf;
|
|
inplace_temp = (char*)malloc(true_extent + (count - 1) * extent);
|
|
if (NULL == inplace_temp) {
|
|
return OMPI_ERR_OUT_OF_RESOURCE;
|
|
}
|
|
rbuf = inplace_temp - lb;
|
|
}
|
|
|
|
if (size > 1) {
|
|
free_buffer = (char*)malloc(true_extent + (count - 1) * extent);
|
|
if (NULL == free_buffer) {
|
|
return OMPI_ERR_OUT_OF_RESOURCE;
|
|
}
|
|
pml_buffer = free_buffer - lb;
|
|
}
|
|
|
|
/* Initialize the receive buffer. */
|
|
|
|
if (rank == (size - 1)) {
|
|
err = ompi_ddt_copy_content_same_ddt(dtype, count, (char*)rbuf,
|
|
(char*)sbuf);
|
|
} else {
|
|
err = MCA_PML_CALL(recv(rbuf, count, dtype, size - 1,
|
|
MCA_COLL_BASE_TAG_REDUCE, comm,
|
|
MPI_STATUS_IGNORE));
|
|
}
|
|
if (MPI_SUCCESS != err) {
|
|
if (NULL != free_buffer) {
|
|
free(free_buffer);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/* Loop receiving and calling reduction function (C or Fortran). */
|
|
|
|
for (i = size - 2; i >= 0; --i) {
|
|
if (rank == i) {
|
|
inbuf = (char*)sbuf;
|
|
} else {
|
|
err = MCA_PML_CALL(recv(pml_buffer, count, dtype, i,
|
|
MCA_COLL_BASE_TAG_REDUCE, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (MPI_SUCCESS != err) {
|
|
if (NULL != free_buffer) {
|
|
free(free_buffer);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
inbuf = pml_buffer;
|
|
}
|
|
|
|
/* Perform the reduction */
|
|
ompi_op_reduce(op, inbuf, rbuf, count, dtype);
|
|
}
|
|
|
|
if (NULL != inplace_temp) {
|
|
err = ompi_ddt_copy_content_same_ddt(dtype, count, (char*)sbuf,
|
|
inplace_temp);
|
|
free(inplace_temp);
|
|
}
|
|
if (NULL != free_buffer) {
|
|
free(free_buffer);
|
|
}
|
|
|
|
/* All done */
|
|
return MPI_SUCCESS;
|
|
}
|
|
|
|
/* copied function (with appropriate renaming) ends here */
|
|
|
|
|
|
/**
|
|
* 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_reduce_intra_check_forced_init (coll_tuned_force_algorithm_mca_param_indices_t *mca_param_indices)
|
|
{
|
|
int rc, requested_alg, max_alg = 6;
|
|
|
|
ompi_coll_tuned_forced_max_algorithms[REDUCE] = max_alg;
|
|
|
|
rc = mca_base_param_reg_int (&mca_coll_tuned_component.super.collm_version,
|
|
"reduce_algorithm_count",
|
|
"Number of reduce algorithms available",
|
|
false, true, max_alg, NULL);
|
|
|
|
mca_param_indices->algorithm_param_index
|
|
= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
|
|
"reduce_algorithm",
|
|
"Which reduce algorithm is used. Can be locked down to choice of: 0 ignore, 1 linear, 2 chain, 3 pipeline, 4 binary, 5 binomial, 6 in-order binary",
|
|
false, false, 0, NULL);
|
|
mca_base_param_lookup_int(mca_param_indices->algorithm_param_index, &(requested_alg));
|
|
if( requested_alg > max_alg ) {
|
|
if( 0 == ompi_comm_rank( MPI_COMM_WORLD ) ) {
|
|
opal_output( 0, "Reduce algorithm #%d is not available (range [0..%d]). Switching back to ignore(0)\n",
|
|
requested_alg, max_alg );
|
|
}
|
|
mca_base_param_set_int( mca_param_indices->algorithm_param_index, 0);
|
|
}
|
|
|
|
mca_param_indices->segsize_param_index
|
|
= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
|
|
"reduce_algorithm_segmentsize",
|
|
"Segment size in bytes used by default for reduce algorithms. Only has meaning if algorithm is forced and supports segmenting. 0 bytes means no segmentation.",
|
|
false, false, 0, NULL);
|
|
|
|
mca_param_indices->tree_fanout_param_index
|
|
= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
|
|
"reduce_algorithm_tree_fanout",
|
|
"Fanout for n-tree used for reduce algorithms. Only has meaning if algorithm is forced and supports n-tree topo based operation.",
|
|
false, false,
|
|
ompi_coll_tuned_init_tree_fanout, /* get system wide default */
|
|
NULL);
|
|
|
|
mca_param_indices->chain_fanout_param_index
|
|
= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
|
|
"reduce_algorithm_chain_fanout",
|
|
"Fanout for chains used for reduce algorithms. Only has meaning if algorithm is forced and supports chain topo based operation.",
|
|
false, false,
|
|
ompi_coll_tuned_init_chain_fanout, /* get system wide default */
|
|
NULL);
|
|
return (MPI_SUCCESS);
|
|
}
|
|
|
|
|
|
int ompi_coll_tuned_reduce_intra_do_forced(void *sbuf, void* rbuf, int count,
|
|
struct ompi_datatype_t *dtype,
|
|
struct ompi_op_t *op, int root,
|
|
struct ompi_communicator_t *comm)
|
|
{
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_do_forced selected algorithm %d",
|
|
comm->c_coll_selected_data->user_forced[REDUCE].algorithm));
|
|
|
|
switch (comm->c_coll_selected_data->user_forced[REDUCE].algorithm) {
|
|
case (0): return ompi_coll_tuned_reduce_intra_dec_fixed (sbuf, rbuf,
|
|
count, dtype,
|
|
op, root, comm);
|
|
case (1): return ompi_coll_tuned_reduce_intra_basic_linear (sbuf, rbuf,
|
|
count, dtype,
|
|
op, root,
|
|
comm);
|
|
case (2): return ompi_coll_tuned_reduce_intra_chain (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm,
|
|
comm->c_coll_selected_data->user_forced[REDUCE].segsize,
|
|
comm->c_coll_selected_data->user_forced[REDUCE].chain_fanout);
|
|
case (3): return ompi_coll_tuned_reduce_intra_pipeline (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm,
|
|
comm->c_coll_selected_data->user_forced[REDUCE].segsize);
|
|
case (4): return ompi_coll_tuned_reduce_intra_binary (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm,
|
|
comm->c_coll_selected_data->user_forced[REDUCE].segsize);
|
|
case (5): return ompi_coll_tuned_reduce_intra_binomial (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm,
|
|
comm->c_coll_selected_data->user_forced[REDUCE].segsize);
|
|
case (6): return ompi_coll_tuned_reduce_intra_in_order_binary(sbuf, rbuf,
|
|
count,
|
|
dtype, op,
|
|
root, comm,
|
|
comm->c_coll_selected_data->user_forced[REDUCE].segsize);
|
|
default:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_do_forced attempt to select algorithm %d when only 0-%d is valid?",
|
|
comm->c_coll_selected_data->user_forced[REDUCE].algorithm, ompi_coll_tuned_forced_max_algorithms[REDUCE]));
|
|
return (MPI_ERR_ARG);
|
|
} /* switch */
|
|
}
|
|
|
|
|
|
int ompi_coll_tuned_reduce_intra_do_this(void *sbuf, void* rbuf, int count,
|
|
struct ompi_datatype_t *dtype,
|
|
struct ompi_op_t *op, int root,
|
|
struct ompi_communicator_t *comm,
|
|
int algorithm, int faninout, int segsize)
|
|
{
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_do_this selected algorithm %d topo faninout %d segsize %d",
|
|
algorithm, faninout, segsize));
|
|
|
|
switch (algorithm) {
|
|
case (0): return ompi_coll_tuned_reduce_intra_dec_fixed (sbuf, rbuf,
|
|
count, dtype, op,
|
|
root, comm);
|
|
case (1): return ompi_coll_tuned_reduce_intra_basic_linear (sbuf, rbuf,
|
|
count, dtype,
|
|
op, root,
|
|
comm);
|
|
case (2): return ompi_coll_tuned_reduce_intra_chain (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm,
|
|
segsize, faninout);
|
|
case (3): return ompi_coll_tuned_reduce_intra_pipeline (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm, segsize);
|
|
case (4): return ompi_coll_tuned_reduce_intra_binary (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm, segsize);
|
|
case (5): return ompi_coll_tuned_reduce_intra_binomial (sbuf, rbuf, count,
|
|
dtype, op, root,
|
|
comm, segsize);
|
|
case (6): return ompi_coll_tuned_reduce_intra_in_order_binary(sbuf, rbuf,
|
|
count,
|
|
dtype, op,
|
|
root, comm,
|
|
segsize);
|
|
|
|
default:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_do_this attempt to select algorithm %d when only 0-%d is valid?",
|
|
algorithm, ompi_coll_tuned_forced_max_algorithms[REDUCE]));
|
|
return (MPI_ERR_ARG);
|
|
} /* switch */
|
|
}
|
|
|