423 строки
15 KiB
C
423 строки
15 KiB
C
/*
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* Copyright (c) 2007-2008 UT-Battelle, LLC
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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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/** @file */
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#include "ompi_config.h"
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#include "ompi/constants.h"
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#include "coll_sm2.h"
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#include "ompi/op/op.h"
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#include "ompi/datatype/datatype.h"
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#include "ompi/communicator/communicator.h"
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/* debug
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#include "opal/sys/timer.h"
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extern uint64_t timers[7];
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end debug */
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/* debug */
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#include <assert.h>
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extern void debug_module(void);
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extern int last_root;
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extern int node_type;
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extern long long free_buff_free_index;
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int last_root;
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int node_type;
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/* end debug */
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/**
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* Shared memory blocking allreduce.
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*/
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static
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int mca_coll_sm2_reduce_intra_fanin(void *sbuf, void *rbuf, int count,
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struct ompi_datatype_t *dtype,
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struct ompi_op_t *op,
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int root,
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struct ompi_communicator_t *comm,
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struct mca_coll_base_module_1_1_0_t *module)
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{
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/* local variables */
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int rc=OMPI_SUCCESS,n_dts_per_buffer,n_data_segments,stripe_number;
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int my_rank, comm_size, child_rank, child, n_children;
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int count_processed,count_this_stripe;
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int process_shift,my_node_index;
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size_t message_extent,dt_extent,ctl_size,len_data_buffer;
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long long tag;
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volatile char * my_data_pointer;
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volatile char * child_data_pointer;
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volatile mca_coll_sm2_nb_request_process_shared_mem_t *my_ctl_pointer;
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volatile mca_coll_sm2_nb_request_process_shared_mem_t * child_ctl_pointer;
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mca_coll_sm2_module_t *sm_module;
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tree_node_t *my_reduction_node;
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sm_work_buffer_t *sm_buffer_desc;
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/* debug */
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last_root=root;
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/* end debug */
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sm_module=(mca_coll_sm2_module_t *) module;
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/* compute process shift */
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my_rank=ompi_comm_rank(comm);
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comm_size=ompi_comm_size(comm);
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process_shift=root;
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my_node_index=my_rank-root;
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/* wrap around */
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if(0 > my_node_index ) {
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my_node_index+=comm_size;
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}
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/* get size of data needed - same layout as user data, so that
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* we can apply the reudction routines directly on these buffers
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*/
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rc=ompi_ddt_type_extent(dtype, &dt_extent);
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if( OMPI_SUCCESS != rc ) {
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goto Error;
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}
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message_extent=dt_extent*count;
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/* lenght of control and data regions */
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ctl_size=sm_module->ctl_memory_per_proc_per_segment;
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len_data_buffer=sm_module->data_memory_per_proc_per_segment;
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/* number of data types copies that the scratch buffer can hold */
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n_dts_per_buffer=((int) len_data_buffer)/dt_extent;
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if ( 0 == n_dts_per_buffer ) {
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rc=OMPI_ERROR;
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goto Error;
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}
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/* compute number of stripes needed to process this collective */
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n_data_segments=(count+n_dts_per_buffer -1 ) / n_dts_per_buffer ;
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/* get my node for the reduction tree */
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my_reduction_node=&(sm_module->reduction_tree[my_node_index]);
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n_children=my_reduction_node->n_children;
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/* debug */
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node_type=my_reduction_node->my_node_type;
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/* end debug */
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if( 1 == n_data_segments ) {
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/* single data segment */
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/* get unique tag for this stripe - assume only one collective
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* per communicator at a given time, so no locking needed
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* for atomic update of the tag */
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tag=sm_module->collective_tag;
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sm_module->collective_tag++;
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/* debug
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assert(tag);
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end debug */
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/* get a pointer to the shared-memory working buffer */
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sm_buffer_desc=alloc_sm2_shared_buffer(sm_module);
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/* debug */
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free_buff_free_index=tag;
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/* end debug */
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/* get number of elements to process in this stripe */
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count_this_stripe=count;
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/* offset to data segment */
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my_ctl_pointer=sm_buffer_desc->proc_memory[my_rank].control_region;
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my_data_pointer=sm_buffer_desc->proc_memory[my_rank].data_segment;
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/***************************
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* Fan into root phase
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***************************/
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if( ROOT_NODE == my_reduction_node->my_node_type ) {
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/*
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* copy local data from source buffer to result buffer
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*/
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)rbuf,
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(char *)sbuf);
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if( 0 != rc ) {
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return OMPI_ERROR;
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}
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/*
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* Wait on children, and apply op to their data
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*/
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for( child=0 ; child < n_children ; child++ ) {
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child_rank=my_reduction_node->children_ranks[child];
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child_rank+=process_shift;
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/* wrap around */
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if( comm_size <= child_rank ){
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child_rank-=comm_size;
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}
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child_ctl_pointer=
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sm_buffer_desc->proc_memory[child_rank].control_region;
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child_data_pointer=
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sm_buffer_desc->proc_memory[child_rank].data_segment;
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/* debug
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if( 0 == child_ctl_pointer->flag ) {
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fprintf(stderr,"TTT 2 count %d root %d child_rank %d \n",
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count,root,child_rank);
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debug_module();
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}
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end debug */
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/* wait until child flag is set */
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while(child_ctl_pointer->flag != tag) {
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opal_progress();
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}
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/* apply collective operation */
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ompi_op_reduce(op,(void *)child_data_pointer,
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(void *)rbuf, count_this_stripe,dtype);
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} /* end child loop */
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} else if( INTERIOR_NODE == my_reduction_node->my_node_type ) {
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/* copy segment into shared buffer - ompi_op_reduce
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* provids only 2 buffers, so can't add from two
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* into a third buffer.
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*/
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)my_data_pointer,
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(char *)sbuf);
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if( 0 != rc ) {
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return OMPI_ERROR;
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}
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/*
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* Wait on children, and apply op to their data
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*/
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for( child=0 ; child < n_children ; child++ ) {
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child_rank=my_reduction_node->children_ranks[child];
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child_rank+=process_shift;
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/* wrap around */
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if( comm_size <= child_rank ){
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child_rank-=comm_size;
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}
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child_ctl_pointer=
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sm_buffer_desc->proc_memory[child_rank].control_region;
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child_data_pointer=
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sm_buffer_desc->proc_memory[child_rank].data_segment;
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/* wait until child flag is set */
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/* debug
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if( 0 == child_ctl_pointer->flag ) {
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fprintf(stderr,"TTT 3 count %d root %d child_rank \n",
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count,root,child_rank);
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debug_module();
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}
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end debug */
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while(child_ctl_pointer->flag != tag) {
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opal_progress();
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}
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/* apply collective operation */
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ompi_op_reduce(op,(void *)child_data_pointer,
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(void *)my_data_pointer, count_this_stripe,dtype);
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} /* end child loop */
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/* set memory barriet to make sure data is in main memory before
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* the completion flgas are set.
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*/
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MB();
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/*
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* Signal parent that data is ready
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*/
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my_ctl_pointer->flag=tag;
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} else {
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/* leaf node */
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/* copy segment into shared buffer - later on will optimize to
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* eliminate extra copies.
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*/
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)my_data_pointer,
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(char *)sbuf);
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if( 0 != rc ) {
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return OMPI_ERROR;
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}
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/* set memory barriet to make sure data is in main memory before
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* the completion flgas are set.
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*/
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MB();
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/*
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* Signal parent that data is ready
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*/
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my_ctl_pointer->flag=tag;
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}
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/* "free" the shared-memory working buffer */
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rc=free_sm2_shared_buffer(sm_module);
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if( OMPI_SUCCESS != rc ) {
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goto Error;
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}
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} else {
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count_processed=0;
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for( stripe_number=0 ; stripe_number < n_data_segments ; stripe_number++ ) {
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/* get unique tag for this stripe - assume only one collective
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* per communicator at a given time, so no locking needed
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* for atomic update of the tag */
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tag=sm_module->collective_tag;
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sm_module->collective_tag++;
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/* get a pointer to the shared-memory working buffer */
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sm_buffer_desc=alloc_sm2_shared_buffer(sm_module);
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/* get number of elements to process in this stripe */
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count_this_stripe=n_dts_per_buffer;
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if( count_processed + count_this_stripe > count )
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count_this_stripe=count-count_processed;
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/* offset to data segment */
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my_ctl_pointer=sm_buffer_desc->proc_memory[my_rank].control_region;
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my_data_pointer=sm_buffer_desc->proc_memory[my_rank].data_segment;
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/***************************
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* Fan into root phase
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***************************/
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if( LEAF_NODE != my_reduction_node->my_node_type ) {
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/* copy segment into shared buffer - ompi_op_reduce
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* provids only 2 buffers, so can't add from two
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* into a third buffer.
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*/
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)my_data_pointer,
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(char *)((char *)sbuf+dt_extent*count_processed));
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if( 0 != rc ) {
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return OMPI_ERROR;
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}
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/*
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* Wait on children, and apply op to their data
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*/
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for( child=0 ; child < n_children ; child++ ) {
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child_rank=my_reduction_node->children_ranks[child];
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child_rank+=process_shift;
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/* wrap around */
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if( comm_size <= child_rank ){
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child_rank-=comm_size;
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}
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child_ctl_pointer=
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sm_buffer_desc->proc_memory[child_rank].control_region;
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child_data_pointer=
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sm_buffer_desc->proc_memory[child_rank].data_segment;
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/* wait until child flag is set */
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/* debug
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if( 0 == child_ctl_pointer->flag ) {
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fprintf(stderr,"TTT 1 count %d root %d child_rank %d \n",
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count,root,child_rank);
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debug_module();
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}
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end debug */
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while(child_ctl_pointer->flag != tag) {
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opal_progress();
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}
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/* apply collective operation */
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ompi_op_reduce(op,(void *)child_data_pointer,
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(void *)my_data_pointer, count_this_stripe,dtype);
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} /* end child loop */
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/* set memory barriet to make sure data is in main memory before
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* the completion flgas are set.
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*/
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MB();
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/*
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* Signal parent that data is ready
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*/
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my_ctl_pointer->flag=tag;
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/* copy data to destination */
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if( ROOT_NODE == my_reduction_node->my_node_type ) {
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/* copy data to user supplied buffer */
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)rbuf+dt_extent*count_processed,
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(char *)my_data_pointer);
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if( 0 != rc ) {
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return OMPI_ERROR;
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}
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}
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} else {
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/* leaf node */
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/* copy segment into shared buffer - later on will optimize to
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* eliminate extra copies.
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*/
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)my_data_pointer,
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(char *)((char *)sbuf+dt_extent*count_processed));
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if( 0 != rc ) {
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return OMPI_ERROR;
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}
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/* set memory barriet to make sure data is in main memory before
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* the completion flgas are set.
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*/
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MB();
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/*
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* Signal parent that data is ready
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*/
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my_ctl_pointer->flag=tag;
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}
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/* "free" the shared-memory working buffer */
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rc=free_sm2_shared_buffer(sm_module);
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if( OMPI_SUCCESS != rc ) {
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goto Error;
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}
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/* update the count of elements processed */
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count_processed+=count_this_stripe;
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}
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}
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/* return */
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return rc;
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Error:
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return rc;
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}
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/**
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* Shared memory blocking reduce.
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*/
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int mca_coll_sm2_reduce_intra(void *sbuf, void *rbuf, int count,
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struct ompi_datatype_t *dtype, struct ompi_op_t *op,
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int root, struct ompi_communicator_t *comm,
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struct mca_coll_base_module_1_1_0_t *module)
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{
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/* local variables */
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int rc;
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rc= mca_coll_sm2_reduce_intra_fanin(sbuf, rbuf, count,
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dtype, op, root, comm, module);
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if( OMPI_SUCCESS != rc ) {
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goto Error;
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}
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return OMPI_SUCCESS;
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Error:
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return rc;
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}
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