721 строка
25 KiB
C
721 строка
25 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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/**
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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_allreduce_intra_fanin_fanout(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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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, child_rank, child, n_parents, n_children;
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int my_fanin_parent,count_processed,count_this_stripe;
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int my_fanout_parent;
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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 * sm_buffer;
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volatile char * my_data_pointer;
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volatile char * child_data_pointer;
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volatile char * parent_data_pointer;
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char *my_base_temp_pointer;
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volatile char * child_base_temp_pointer;
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volatile char * parent_base_temp_pointer;
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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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volatile mca_coll_sm2_nb_request_process_shared_mem_t * parent_ctl_pointer;
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mca_coll_sm2_module_t *sm_module;
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tree_node_t *my_reduction_node, *my_fanout_read_tree;
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sm_work_buffer_t *sm_buffer_desc;
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sm_module=(mca_coll_sm2_module_t *) module;
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/* get unique tag for this collective - 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 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_size(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_rank=ompi_comm_rank(comm);
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my_reduction_node=&(sm_module->reduction_tree[my_rank]);
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my_fanout_read_tree=&(sm_module->fanout_read_tree[my_rank]);
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n_children=my_reduction_node->n_children;
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n_parents=my_reduction_node->n_parents;
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my_fanin_parent=my_reduction_node->parent_rank;
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my_fanout_parent=my_fanout_read_tree->parent_rank;
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count_processed=0;
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/* get a pointer to the shared-memory working buffer */
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/* NOTE: starting with a rather synchronous approach */
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for( stripe_number=0 ; stripe_number < n_data_segments ; stripe_number++ ) {
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sm_buffer_desc=alloc_sm2_shared_buffer(sm_module);
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sm_buffer=sm_buffer_desc->base_segment_address;
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if( NULL == sm_buffer) {
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rc=OMPI_ERR_OUT_OF_RESOURCE;
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goto Error;
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}
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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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/* get base address to "my" memory segment */
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my_base_temp_pointer=(char *)
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((char *)sm_buffer+sm_module->sm_buffer_mgmt_barrier_tree.my_rank*
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sm_module->segement_size_per_process);
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/* offset to data segment */
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my_data_pointer=my_base_temp_pointer+ctl_size;
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my_ctl_pointer=(mca_coll_sm2_nb_request_process_shared_mem_t *)
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my_base_temp_pointer;
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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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/* get base address of child process */
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child_base_temp_pointer=(char *)
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((char *)sm_buffer+child_rank*
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sm_module->segement_size_per_process);
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child_data_pointer=child_base_temp_pointer+ctl_size;
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child_ctl_pointer=
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( mca_coll_sm2_nb_request_process_shared_mem_t * volatile)
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child_base_temp_pointer;
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/* wait until child flag is set */
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while(!
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( (child_ctl_pointer->flag == tag) &
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(child_ctl_pointer->index== stripe_number) ) ) {
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/* Note: Actually need to make progress here */
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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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/* test
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{
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int ii,n_ints;
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int *my_int=(int *)my_data_pointer;
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int *child_int=(int *)child_data_pointer;
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n_ints=count_this_stripe/4;
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for(ii=0 ; ii < n_ints ; ii++ ) {
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my_int[ii]+=child_data_pointer[ii];
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}
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}
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end test */
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/* end test */
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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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my_ctl_pointer->index=stripe_number;
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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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my_ctl_pointer->index=stripe_number;
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}
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/***************************
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* Fan into root phase
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***************************/
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/*
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* Fan out from root - let the memory copies at each
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* stage help reduce memory contention.
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*/
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if( ROOT_NODE == my_fanout_read_tree->my_node_type ) {
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/* I am the root - so copy signal children, and then
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* start reading
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*/
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MB();
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my_ctl_pointer->flag=-tag;
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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 *)((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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} else if( LEAF_NODE == my_fanout_read_tree->my_node_type ) {
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parent_base_temp_pointer=(char *)
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((char *)sm_buffer+my_fanout_parent*
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sm_module->segement_size_per_process);
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parent_data_pointer=(volatile char *)
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((char *)parent_base_temp_pointer+ctl_size);
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parent_ctl_pointer=(volatile
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mca_coll_sm2_nb_request_process_shared_mem_t *)
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parent_base_temp_pointer;
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child_ctl_pointer=
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(volatile mca_coll_sm2_nb_request_process_shared_mem_t *)
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parent_data_pointer;
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/*
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* wait on Parent to signal that data is ready
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*/
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while(!
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( (parent_ctl_pointer->flag == -tag) &
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(parent_ctl_pointer->index== stripe_number) ) ) {
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/* Note: Actually need to make progress here */
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opal_progress();
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}
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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 *)parent_data_pointer);
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if( 0 != rc ) {
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return OMPI_ERROR;
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}
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} else {
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/* interior nodes */
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parent_base_temp_pointer=(char *)
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((char *)sm_buffer+my_fanout_parent*
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sm_module->segement_size_per_process);
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parent_data_pointer=(volatile char *)
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((char *)parent_base_temp_pointer+ctl_size);
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parent_ctl_pointer=(volatile
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mca_coll_sm2_nb_request_process_shared_mem_t *)
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parent_base_temp_pointer;
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child_ctl_pointer=
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(volatile mca_coll_sm2_nb_request_process_shared_mem_t *)
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parent_data_pointer;
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/*
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* wait on Parent to signal that data is ready
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*/
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while(!
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( (parent_ctl_pointer->flag == -tag) &
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(parent_ctl_pointer->index== stripe_number) ) ) {
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/* Note: Actually need to make progress here */
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opal_progress();
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}
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/* copy the data to my shared buffer, for access by children */
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)my_data_pointer,(char *)parent_data_pointer);
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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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/* signal children that they may read the result data */
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my_ctl_pointer->flag=-tag;
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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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/* "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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/* 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 allreduce.
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*/
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static
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int mca_coll_sm2_allreduce_intra_recursive_doubling(void *sbuf, void *rbuf,
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int count, struct ompi_datatype_t *dtype,
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struct ompi_op_t *op, 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 pair_rank,exchange,extra_rank;
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int index_read,index_write;
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pair_exchange_node_t *my_exchange_node;
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int my_rank,count_processed,count_this_stripe;
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size_t message_extent,dt_extent,ctl_size,len_data_buffer;
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long long tag, base_tag;
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sm_work_buffer_t *sm_buffer_desc;
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volatile char * sm_buffer;
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volatile char * my_tmp_data_buffer[2];
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volatile char * my_write_pointer;
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volatile char * my_read_pointer;
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volatile char * extra_rank_write_data_pointer;
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volatile char * extra_rank_read_data_pointer;
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volatile char * partner_read_pointer;
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volatile char * partner_write_pointer;
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char *my_base_temp_pointer;
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volatile char * partner_base_temp_pointer;
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volatile char * extra_rank_base_temp_pointer;
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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 *
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partner_ctl_pointer;
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volatile mca_coll_sm2_nb_request_process_shared_mem_t *
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extra_ctl_pointer;
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mca_coll_sm2_module_t *sm_module;
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/* debug */
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opal_timer_t t0,t1,t2,t3,t4,t5,t6,t7,t8,t9,t10;
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/* end debug */
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sm_module=(mca_coll_sm2_module_t *) module;
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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_size(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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/* need a read and a write buffer for a pair-wise exchange of data */
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n_dts_per_buffer/=2;
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len_data_buffer=n_dts_per_buffer*dt_extent;
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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_exchange_node=&(sm_module->recursive_doubling_tree);
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my_rank=ompi_comm_rank(comm);
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count_processed=0;
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/* get a pointer to the shared-memory working buffer */
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/* NOTE: starting with a rather synchronous approach */
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for( stripe_number=0 ; stripe_number < n_data_segments ; stripe_number++ ) {
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/* debug */
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t0=opal_sys_timer_get_cycles();
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/* end debug */
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sm_buffer_desc=alloc_sm2_shared_buffer(sm_module);
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sm_buffer=sm_buffer_desc->base_segment_address;
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if( NULL == sm_buffer) {
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rc=OMPI_ERR_OUT_OF_RESOURCE;
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goto Error;
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}
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/* debug */
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t1=opal_sys_timer_get_cycles();
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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=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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/* get unique set of tags for this stripe.
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* 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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base_tag=sm_module->collective_tag;
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sm_module->collective_tag+=my_exchange_node->n_tags;
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/* get base address to "my" memory segment */
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my_base_temp_pointer=(char *)
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((char *)sm_buffer+sm_module->sm_buffer_mgmt_barrier_tree.my_rank*
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sm_module->segement_size_per_process);
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/* offset to data segment */
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my_ctl_pointer=(mca_coll_sm2_nb_request_process_shared_mem_t *)
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my_base_temp_pointer;
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/* my partner will read my data, as I am reducing it's data into
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* my buffer
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*/
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my_write_pointer=my_base_temp_pointer+ctl_size;
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my_read_pointer=my_write_pointer+len_data_buffer;
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my_tmp_data_buffer[0]=my_write_pointer;
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my_tmp_data_buffer[1]=my_read_pointer;
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/* debug */
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t2=opal_sys_timer_get_cycles();
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timers[0]+=(t2-t1);
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/* end debug */
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/* copy data into the write buffer */
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rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
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(char *)my_write_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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/* debug */
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t3=opal_sys_timer_get_cycles();
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timers[1]+=(t3-t2);
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/* end debug */
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/* copy data in from the "extra" source, if need be */
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tag=base_tag;
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if(0 < my_exchange_node->n_extra_sources) {
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if ( EXCHANGE_NODE == my_exchange_node->node_type ) {
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extra_rank=my_exchange_node->rank_extra_source;
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extra_rank_base_temp_pointer=(char *)
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((char *)sm_buffer+extra_rank*
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sm_module->segement_size_per_process);
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extra_ctl_pointer=
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( mca_coll_sm2_nb_request_process_shared_mem_t * volatile)
|
|
extra_rank_base_temp_pointer;
|
|
extra_rank_write_data_pointer=extra_rank_base_temp_pointer+
|
|
ctl_size;
|
|
|
|
/* wait until remote data is read */
|
|
while( extra_ctl_pointer->flag < tag ) {
|
|
opal_progress();
|
|
}
|
|
|
|
/* apply collective operation */
|
|
ompi_op_reduce(op,(void *)extra_rank_write_data_pointer,
|
|
(void *)my_write_pointer, count_this_stripe,dtype);
|
|
} else {
|
|
|
|
/* set memory barriet to make sure data is in main memory before
|
|
* the completion flgas are set.
|
|
*/
|
|
|
|
MB();
|
|
|
|
/*
|
|
* Signal parent that data is ready
|
|
*/
|
|
my_ctl_pointer->flag=tag;
|
|
|
|
}
|
|
}
|
|
|
|
MB();
|
|
/*
|
|
* Signal parent that data is ready
|
|
*/
|
|
tag=base_tag+1;
|
|
my_ctl_pointer->flag=tag;
|
|
|
|
/* loop over data exchanges */
|
|
for(exchange=0 ; exchange < my_exchange_node->n_exchanges ; exchange++) {
|
|
|
|
/* debug */
|
|
t4=opal_sys_timer_get_cycles();
|
|
/* end debug */
|
|
|
|
index_read=(exchange&1);
|
|
index_write=((exchange+1)&1);
|
|
|
|
my_write_pointer=my_tmp_data_buffer[index_write];
|
|
my_read_pointer=my_tmp_data_buffer[index_read];
|
|
|
|
/* is the remote data read */
|
|
pair_rank=my_exchange_node->rank_exchanges[exchange];
|
|
partner_base_temp_pointer=(char *)
|
|
((char *)sm_buffer+pair_rank*
|
|
sm_module->segement_size_per_process);
|
|
|
|
partner_ctl_pointer=
|
|
( mca_coll_sm2_nb_request_process_shared_mem_t * volatile)
|
|
partner_base_temp_pointer;
|
|
partner_read_pointer=(char *)partner_ctl_pointer+ctl_size;
|
|
if( 1 == index_read ) {
|
|
partner_read_pointer+=len_data_buffer;
|
|
}
|
|
|
|
/* wait until remote data is read */
|
|
while( partner_ctl_pointer->flag < tag ) {
|
|
opal_progress();
|
|
}
|
|
/* debug */
|
|
t5=opal_sys_timer_get_cycles();
|
|
timers[2]+=(t5-t4);
|
|
/* end debug */
|
|
|
|
/* reduce data into my write buffer */
|
|
/* apply collective operation */
|
|
/*
|
|
ompi_op_reduce(op,(void *)partner_read_pointer,
|
|
(void *)my_write_pointer, count_this_stripe,dtype);
|
|
*/
|
|
|
|
/* test */
|
|
|
|
{
|
|
int ii,n_ints;
|
|
int * restrict my_read=(int *)my_read_pointer;
|
|
int * restrict my_write=(int *)my_write_pointer;
|
|
int * restrict exchange_read=(int *)partner_read_pointer;
|
|
n_ints=count_this_stripe;
|
|
for(ii=0 ; ii < n_ints ; ii++ ) {
|
|
my_write[ii]=my_read[ii]+exchange_read[ii];
|
|
}
|
|
|
|
}
|
|
/* debug */
|
|
t6=opal_sys_timer_get_cycles();
|
|
timers[3]+=(t6-t5);
|
|
/* end debug */
|
|
|
|
/* end test */
|
|
|
|
/* signal that I am done reading my peer's data */
|
|
tag++;
|
|
MB();
|
|
my_ctl_pointer->flag=tag;
|
|
|
|
/* wait for my peer to finish - other wise buffers may be
|
|
* reused too early */
|
|
while( partner_ctl_pointer->flag < tag ) {
|
|
opal_progress();
|
|
}
|
|
/* debug */
|
|
t7=opal_sys_timer_get_cycles();
|
|
timers[4]+=(t7-t6);
|
|
/* end debug */
|
|
|
|
}
|
|
|
|
/* copy data in from the "extra" source, if need be */
|
|
if(0 < my_exchange_node->n_extra_sources) {
|
|
tag=base_tag+my_exchange_node->n_tags-1;
|
|
|
|
if ( EXTRA_NODE == my_exchange_node->node_type ) {
|
|
|
|
extra_rank=my_exchange_node->rank_extra_source;
|
|
extra_rank_base_temp_pointer=(char *)
|
|
((char *)sm_buffer+extra_rank*
|
|
sm_module->segement_size_per_process);
|
|
|
|
extra_ctl_pointer=
|
|
( mca_coll_sm2_nb_request_process_shared_mem_t * volatile)
|
|
extra_rank_base_temp_pointer;
|
|
index_read=(my_exchange_node->log_2&1);
|
|
extra_rank_read_data_pointer=extra_rank_base_temp_pointer+
|
|
ctl_size;
|
|
if( index_read ) {
|
|
extra_rank_read_data_pointer+=len_data_buffer;
|
|
}
|
|
|
|
/* wait until remote data is read */
|
|
while(! ( extra_ctl_pointer->flag == tag ) ) {
|
|
opal_progress();
|
|
}
|
|
|
|
|
|
/* write the data into my read buffer */
|
|
rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
|
|
(char *)my_write_pointer,
|
|
(char *)extra_rank_read_data_pointer);
|
|
if( 0 != rc ) {
|
|
return OMPI_ERROR;
|
|
}
|
|
|
|
} else {
|
|
|
|
tag=base_tag+my_exchange_node->n_tags-1;
|
|
/* set memory barriet to make sure data is in main memory before
|
|
* the completion flgas are set.
|
|
*/
|
|
|
|
MB();
|
|
|
|
/*
|
|
* Signal parent that data is ready
|
|
*/
|
|
my_ctl_pointer->flag=tag;
|
|
|
|
}
|
|
}
|
|
|
|
/* debug */
|
|
t8=opal_sys_timer_get_cycles();
|
|
/* end debug */
|
|
/* copy data into the destination buffer */
|
|
rc=ompi_ddt_copy_content_same_ddt(dtype, count_this_stripe,
|
|
(char *)((char *)rbuf+dt_extent*count_processed),
|
|
(char *)my_write_pointer);
|
|
if( 0 != rc ) {
|
|
return OMPI_ERROR;
|
|
}
|
|
/* debug */
|
|
t9=opal_sys_timer_get_cycles();
|
|
timers[5]+=(t9-t8);
|
|
/* end debug */
|
|
|
|
/* "free" the shared-memory working buffer */
|
|
rc=free_sm2_shared_buffer(sm_module);
|
|
if( OMPI_SUCCESS != rc ) {
|
|
goto Error;
|
|
}
|
|
/* debug */
|
|
t10=opal_sys_timer_get_cycles();
|
|
timers[6]+=(t10-t9);
|
|
/* end debug */
|
|
|
|
/* update the count of elements processed */
|
|
count_processed+=count_this_stripe;
|
|
}
|
|
|
|
/* return */
|
|
return rc;
|
|
|
|
Error:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Shared memory blocking allreduce.
|
|
*/
|
|
int mca_coll_sm2_allreduce_intra(void *sbuf, void *rbuf, int count,
|
|
struct ompi_datatype_t *dtype,
|
|
struct ompi_op_t *op,
|
|
struct ompi_communicator_t *comm,
|
|
struct mca_coll_base_module_1_1_0_t *module)
|
|
{
|
|
/* local variables */
|
|
int rc;
|
|
|
|
if( 0 != (op->o_flags & OMPI_OP_FLAGS_COMMUTE)) {
|
|
/* Commutative Operation */
|
|
rc= mca_coll_sm2_allreduce_intra_recursive_doubling(sbuf, rbuf, count,
|
|
dtype, op, comm, module);
|
|
if( OMPI_SUCCESS != rc ) {
|
|
goto Error;
|
|
}
|
|
} else {
|
|
/* Non-Commutative Operation */
|
|
rc= mca_coll_sm2_allreduce_intra_fanin_fanout(sbuf, rbuf, count,
|
|
dtype, op, comm, module);
|
|
if( OMPI_SUCCESS != rc ) {
|
|
goto Error;
|
|
}
|
|
}
|
|
|
|
|
|
return OMPI_SUCCESS;
|
|
|
|
Error:
|
|
return rc;
|
|
}
|