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for non-powers of 2, distribute the work on the first step among all

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the procs doing the work.

This commit was SVN r18480.
Этот коммит содержится в:
Rich Graham 2008-05-22 18:50:53 +00:00
родитель d0e26b1cf6
Коммит 5900415a25
1 изменённых файлов: 171 добавлений и 65 удалений
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236
ompi/mca/coll/sm2/coll_sm2_allreduce.c
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@ -138,7 +138,6 @@ int mca_coll_sm2_allreduce_intra_fanin_fanout(void *sbuf, void *rbuf, int count,
while(!
( (child_ctl_pointer->flag == tag) &
(child_ctl_pointer->index== stripe_number) ) ) {
/* Note: Actually need to make progress here */
opal_progress();
}
@ -785,6 +784,7 @@ int mca_coll_sm2_allreduce_intra_recursive_doubling(void *sbuf, void *rbuf,
sm_work_buffer_t *sm_buffer_desc;
volatile char * my_tmp_data_buffer[2];
volatile char * my_write_pointer;
volatile char * my_extra_write_pointer;
volatile char * my_read_pointer;
volatile char * extra_rank_write_data_pointer;
volatile char * extra_rank_read_data_pointer;
@ -883,23 +883,62 @@ int mca_coll_sm2_allreduce_intra_recursive_doubling(void *sbuf, void *rbuf,
/* copy data in from the "extra" source, if need be */
tag=base_tag;
if(0 < my_exchange_node->n_extra_sources) {
int n_my_count;
if ( EXCHANGE_NODE == my_exchange_node->node_type ) {
/* signal to partner that I am ready */
MB();
/*
* Signal extra node that data is ready
*/
my_ctl_pointer->flag=tag;
/* figure out my portion of the reduction */
n_my_count=count_this_stripe/2;
extra_rank=my_exchange_node->rank_extra_source;
extra_ctl_pointer=
sm_buffer_desc->proc_memory[extra_rank].control_region;
extra_rank_write_data_pointer=
sm_buffer_desc->proc_memory[extra_rank].data_segment;
extra_rank_write_data_pointer=
sm_buffer_desc->proc_memory[extra_rank].data_segment;
/* 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);
/* wait until remote data is read */
while( extra_ctl_pointer->flag < tag ) {
opal_progress();
}
/* apply collective operation to first half of the data */
ompi_op_reduce(op,(void *)extra_rank_write_data_pointer,
(void *)my_write_pointer, n_my_count,dtype);
/* wait for my partner to finish reducing the data */
tag=base_tag+1;
while( extra_ctl_pointer->flag < tag ) {
opal_progress();
}
/* read my partner's data */
/* adjust read an write pointers */
extra_rank_write_data_pointer+=
(count_this_stripe-n_my_count)*dt_extent;
rc=ompi_ddt_copy_content_same_ddt(dtype,
count_this_stripe-n_my_count,
(char *)(my_write_pointer+
(count_this_stripe-n_my_count)*dt_extent),
(char *)extra_rank_write_data_pointer);
if( 0 != rc ) {
return OMPI_ERROR;
}
/* now we are ready for the power of 2 portion of the
* algorithm
*/
} else {
/* set memory barriet to make sure data is in main memory before
@ -909,10 +948,39 @@ int mca_coll_sm2_allreduce_intra_recursive_doubling(void *sbuf, void *rbuf,
MB();
/*
* Signal parent that data is ready
* Signal extra node that data is ready
*/
my_ctl_pointer->flag=tag;
/* figure out my portion of the reduction */
n_my_count=count_this_stripe-(count_this_stripe/2);
/* get the pointer to the partners data that needs to be reduced */
extra_rank=my_exchange_node->rank_extra_source;
extra_ctl_pointer=
sm_buffer_desc->proc_memory[extra_rank].control_region;
extra_rank_write_data_pointer=
sm_buffer_desc->proc_memory[extra_rank].data_segment;
/* offset into my half of the data */
extra_rank_write_data_pointer+=
(count_this_stripe/2)*dt_extent;
my_extra_write_pointer=my_write_pointer+
(count_this_stripe/2)*dt_extent;
/* wait until remote data is read */
while( extra_ctl_pointer->flag < tag ) {
opal_progress();
}
/* apply collective operation to second half of the data */
ompi_op_reduce(op,(void *)extra_rank_write_data_pointer,
(void *)my_extra_write_pointer, n_my_count,dtype);
/* signal that I am done, so my partner can read my data */
MB();
tag=base_tag+1;
my_ctl_pointer->flag=tag;
}
}
@ -957,28 +1025,10 @@ int mca_coll_sm2_allreduce_intra_recursive_doubling(void *sbuf, void *rbuf,
/* 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 */
ompi_3buff_op_reduce(op,my_read_pointer,partner_read_pointer,
my_write_pointer,count_this_stripe,dtype);
/*
{
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);
@ -1134,6 +1184,7 @@ int mca_coll_sm2_allreduce_intra_reducescatter_allgather(void *sbuf, void *rbuf,
volatile char * partner_base_pointer;
volatile char * my_pointer;
volatile char * my_base_pointer;
volatile char * my_extra_write_pointer;
volatile char * partner_pointer;
volatile char * source_pointer;
mca_coll_sm2_nb_request_process_shared_mem_t *my_ctl_pointer;
@ -1200,14 +1251,6 @@ int mca_coll_sm2_allreduce_intra_reducescatter_allgather(void *sbuf, void *rbuf,
sm_module->scratch_space[i]++;
}
}
/* debug
fprintf(stderr," my_rank %d element list count_this_stripe %d : ",my_rank,count_this_stripe);
for(i=0 ; i < comm_size ; i++ ) {
fprintf(stderr," %d ",sm_module->scratch_space[i]);
}
fprintf(stderr," \n");
fflush(stderr);
end debug */
/* get unique set of tags for this stripe.
* Assume only one collective
@ -1228,17 +1271,6 @@ int mca_coll_sm2_allreduce_intra_reducescatter_allgather(void *sbuf, void *rbuf,
if( 0 != rc ) {
return OMPI_ERROR;
}
/* debug
{ int *int_tmp=(int *)my_base_pointer;
int i;
fprintf(stderr," my rank %d data in tmp :: ",my_rank);
for (i=0 ; i < count_this_stripe ; i++ ) {
fprintf(stderr," %d ",int_tmp[i]);
}
fprintf(stderr,"\n");
fflush(stderr);
}
end debug */
/* debug
t3=opal_sys_timer_get_cycles();
@ -1247,22 +1279,65 @@ int mca_coll_sm2_allreduce_intra_reducescatter_allgather(void *sbuf, void *rbuf,
/* copy data in from the "extra" source, if need be */
tag=base_tag;
if(0 < my_exchange_node->n_extra_sources) {
if ( EXCHANGE_NODE == my_exchange_node->node_type ) {
extra_rank=my_exchange_node->rank_extra_source;
extra_ctl_pointer=
sm_buffer_desc->proc_memory[extra_rank].control_region;
extra_rank_write_data_pointer=
sm_buffer_desc->proc_memory[extra_rank].data_segment;
if(0 < my_exchange_node->n_extra_sources) {
int n_my_count;
if ( EXCHANGE_NODE == my_exchange_node->node_type ) {
/* signal to partner that I am ready */
MB();
/*
* Signal extra node that data is ready
*/
my_ctl_pointer->flag=tag;
/* figure out my portion of the reduction */
n_my_count=count_this_stripe/2;
extra_rank=my_exchange_node->rank_extra_source;
extra_ctl_pointer=
sm_buffer_desc->proc_memory[extra_rank].control_region;
extra_rank_write_data_pointer=
sm_buffer_desc->proc_memory[extra_rank].data_segment;
/* wait until remote data is read */
while( extra_ctl_pointer->flag < tag ) {
opal_progress();
}
/* apply collective operation to first half of the data */
if( 0 < n_my_count ) {
ompi_op_reduce(op,(void *)extra_rank_write_data_pointer,
(void *)my_base_pointer, n_my_count,dtype);
}
/* wait for my partner to finish reducing the data */
tag=base_tag+1;
while( extra_ctl_pointer->flag < tag ) {
opal_progress();
}
/* read my partner's data */
/* 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_base_pointer, count_this_stripe,dtype);
/* adjust read an write pointers */
extra_rank_write_data_pointer+=(n_my_count*dt_extent);
if( 0 < (count_this_stripe-n_my_count) ) {
rc=ompi_ddt_copy_content_same_ddt(dtype,
count_this_stripe-n_my_count,
(char *)(my_base_pointer+n_my_count*dt_extent),
(char *)extra_rank_write_data_pointer);
if( 0 != rc ) {
return OMPI_ERROR;
}
}
/* now we are ready for the power of 2 portion of the
* algorithm
*/
} else {
/* set memory barriet to make sure data is in main memory before
@ -1272,10 +1347,41 @@ int mca_coll_sm2_allreduce_intra_reducescatter_allgather(void *sbuf, void *rbuf,
MB();
/*
* Signal parent that data is ready
* Signal extra node that data is ready
*/
my_ctl_pointer->flag=tag;
/* figure out my portion of the reduction */
n_my_count=count_this_stripe-(count_this_stripe/2);
/* get the pointer to the partners data that needs to be reduced */
extra_rank=my_exchange_node->rank_extra_source;
extra_ctl_pointer=
sm_buffer_desc->proc_memory[extra_rank].control_region;
extra_rank_write_data_pointer=
sm_buffer_desc->proc_memory[extra_rank].data_segment;
/* offset into my half of the data */
extra_rank_write_data_pointer+=
((count_this_stripe/2)*dt_extent);
my_extra_write_pointer=my_base_pointer+
((count_this_stripe/2)*dt_extent);
/* wait until remote data is read */
while( extra_ctl_pointer->flag < tag ) {
opal_progress();
}
/* apply collective operation to second half of the data */
if( 0 < n_my_count ) {
ompi_op_reduce(op,(void *)extra_rank_write_data_pointer,
(void *)my_extra_write_pointer, n_my_count,dtype);
}
/* signal that I am done, so my partner can read my data */
MB();
tag=base_tag+1;
my_ctl_pointer->flag=tag;
}
}
MB();