/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2009-2013 Oak Ridge National Laboratory. All rights reserved.
* Copyright (c) 2009-2012 Mellanox Technologies. All rights reserved.
* Copyright (c) 2013 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2013 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/constants.h"
#include "ompi/datatype/ompi_datatype.h"
#include "ompi/communicator/communicator.h"
#include "bcol_basesmuma_utils.h"
#include "bcol_basesmuma.h"
/* debug
* #include "opal/sys/timer.h"
*
* extern uint64_t timers[7];
* end debug */
/* debug */
#include <unistd.h>
/* end debug */
/* includes shared memory optimization */
#define BCOL_BASESMUMA_SM_PROBE(src_list, n_src, my_index, matched, src) \
do { \
int j; \
for( j = 0; j < n_src; j++) { \
parent_ctl_pointer = data_buffs[src_list[j]].ctl_struct; \
parent_data_pointer = data_buffs[src_list[j]].payload; \
if( IS_DATA_READY(parent_ctl_pointer,ready_flag,sequence_number)) { \
src = src_list[j]; \
matched = 1; \
break; \
} \
} \
} while(0)
/*
#define IS_LARGE_DATA_READY(peer, my_flag, my_sequence_number) \
(((peer)->sequence_number == (my_sequence_number) && \
(peer)->flags[BCAST_FLAG] >= (my_flag) \
)? true : false )
*/
/*
#define IS_KNOWN_ROOT_DATA_READY(peer, my_flag, my_sequence_number) \
(((peer)->sequence_number == (my_sequence_number) && \
(peer)->flags[BCAST_FLAG][bcol_id] >= (my_flag) \
)? true : false )
*/
#define BCOL_BASESMUMA_SM_LARGE_MSG_PROBE(src_list, n_src, my_index, matched, src, flag_index, bcol_id) \
do { \
int j; \
for( j = 0; j < n_src; j++) { \
/* fprintf(stderr,"my_rank %d and %d\n",my_rank,1); */ \
if(src_list[j] != -1) { \
parent_ctl_pointer = ctl_structs[src_list[j]]; \
parent_data_pointer = (void *) data_buffs[src_list[j]].ctl_struct; \
/*fprintf(stderr,"my_rank %d ready flag %d partner flag %d and %d\n",my_rank,ready_flag,parent_ctl_pointer->flag,2); */ \
if( IS_PEER_READY(parent_ctl_pointer,ready_flag,sequence_number, flag_index, bcol_id)) { \
src = src_list[j]; \
matched = 1; \
index = j; \
/* fprintf(stderr,"found it from %d!\n",src);*/ \
break; \
} \
} \
} \
} while(0)
#define K_NOMIAL_DATA_SRC(radix, my_group_index, group_size, group_root, data_src, radix_mask) \
do { \
int relative_rank = (my_group_index >= group_root) ? my_group_index - group_root : \
my_group_index - group_root + group_size; \
radix_mask = 1; \
while (radix_mask < group_size) { \
if (relative_rank % (radix * radix_mask)) { \
data_src = relative_rank/(radix * radix_mask) * (radix * radix_mask) + group_root; \
if (data_src >= group_size) data_src -= group_size; \
break; \
} \
radix_mask *= radix; \
} \
} while (0)
int bcol_basesmuma_bcast_k_nomial_knownroot(bcol_function_args_t *input_args,
mca_bcol_base_function_t *c_input_args)
{
/* local variables */
mca_bcol_basesmuma_module_t* bcol_module=
(mca_bcol_basesmuma_module_t *)c_input_args->bcol_module;
mca_bcol_basesmuma_component_t *cs = &mca_bcol_basesmuma_component;
int i, matched = 0;
int group_size;
int my_rank;
int leading_dim,
buff_idx,
idx;
int count = input_args->count;
struct ompi_datatype_t* dtype = input_args->dtype;
int64_t sequence_number = input_args->sequence_num;
int radix =
mca_bcol_basesmuma_component.k_nomial_radix;
int radix_mask;
int16_t data_src = -1;
volatile int8_t ready_flag;
int bcol_id = (int) bcol_module->super.bcol_id;
volatile mca_bcol_basesmuma_payload_t *data_buffs;
volatile char* parent_data_pointer;
volatile mca_bcol_basesmuma_header_t *parent_ctl_pointer;
volatile mca_bcol_basesmuma_header_t *my_ctl_pointer;
size_t pack_len = 0;
void *data_addr = (void *)((unsigned char *)input_args->src_desc->data_addr +
input_args->sbuf_offset);
#if 0
fprintf(stderr,"Entering nb-sm broadcast input_args->sbuf_offset %d \n",input_args->sbuf_offset);
fflush(stderr);
#endif
/* we will work only on packed data - so compute the length*/
BASESMUMA_VERBOSE(3, ("Calling bcol_basesmuma_bcast_k_nomial_knownroot"));
pack_len = mca_bcol_base_get_buff_length(dtype, count);
/* Some hierarchical algorithms have data that is accumulated at each step
* this factor accounts for this
*/
pack_len = pack_len*input_args->hier_factor;
buff_idx = input_args->buffer_index;
/* Get addressing information */
my_rank = bcol_module->super.sbgp_partner_module->my_index;
group_size = bcol_module->colls_no_user_data.size_of_group;
leading_dim = bcol_module->colls_no_user_data.size_of_group;
idx = SM_ARRAY_INDEX(leading_dim,buff_idx,0);
data_buffs = (volatile mca_bcol_basesmuma_payload_t *)
bcol_module->colls_with_user_data.data_buffs + idx;
/* Set pointer to current proc ctrl region */
my_ctl_pointer = data_buffs[my_rank].ctl_struct;
/* setup resource recycling */
BASESMUMA_HEADER_INIT(my_ctl_pointer, ready_flag, sequence_number, bcol_id);
/* removing dependence on sequence number */
/* I believe this is resolved now with the signaling flags */
/*
ready_temp = 1 + (int8_t) flag_offset + (int8_t) bcol_id;
if( ready_temp >= my_ctl_pointer->flags[BCAST_FLAG][bcol_id]) {
ready_flag = ready_temp;
} else {
ready_flag = my_ctl_pointer->flags[BCAST_FLAG][bcol_id];
}
opal_atomic_wmb ();
my_ctl_pointer->sequence_number = sequence_number;
*/
/* non-blocking broadcast algorithm */
/* If I am the root, then signal ready flag */
if(input_args->root_flag) {
BASESMUMA_VERBOSE(10,("I am the root of the data"));
/*
* signal ready flag
*/
opal_atomic_wmb ();
my_ctl_pointer->flags[BCAST_FLAG][bcol_id] = ready_flag;
/* root is finished */
goto Release;
}
/* Calculate source of the data */
K_NOMIAL_DATA_SRC(radix, my_rank, group_size,
input_args->root_route->rank, data_src, radix_mask);
parent_ctl_pointer = data_buffs[data_src].ctl_struct;
parent_data_pointer = data_buffs[data_src].payload;
for( i = 0; i < cs->num_to_probe && 0 == matched; i++) {
if(IS_PEER_READY(parent_ctl_pointer,ready_flag,sequence_number, BCAST_FLAG, bcol_id)) {
matched = 1;
break;
}
}
/* If not matched, then hop out and put me on progress list */
if(0 == matched ) {
BASESMUMA_VERBOSE(10,("Shared memory probe didn't find a match"));
return BCOL_FN_NOT_STARTED;
}
/* else, we found our root within the group ... */
BASESMUMA_VERBOSE(10,("Shared memory probe was matched, the root is %d", data_src));
/* copy the data */
memcpy(data_addr, (void *) parent_data_pointer, pack_len);
/* set the memory barrier to ensure completion */
opal_atomic_wmb ();
/* signal that I am done */
my_ctl_pointer->flags[BCAST_FLAG][bcol_id] = ready_flag;
Release:
my_ctl_pointer->starting_flag_value[bcol_id]++;
return BCOL_FN_COMPLETE;
}
/**
* Shared memory non-blocking Broadcast - K-nomial fan-out for small data buffers.
* This routine assumes that buf (the input buffer) is a single writer
* multi reader (SWMR) shared memory buffer owned by the calling rank
* which is the only rank that can write to this buffers.
* It is also assumed that the buffers are registered and fragmented
* at the ML level and that buf is sufficiently large to hold the data.
*
*
* @param buf - SWMR shared buffer within a sbgp that the
* executing rank can write to.
* @param count - the number of elements in the shared buffer.
* @param dtype - the datatype of a shared buffer element.
* @param root - the index within the sbgp of the root.
* @param module - basesmuma module.
*/
int bcol_basesmuma_bcast_k_nomial_anyroot(bcol_function_args_t *input_args,
mca_bcol_base_function_t *c_input_args)
{
/* local variables */
mca_bcol_basesmuma_module_t* bcol_module=
(mca_bcol_basesmuma_module_t *)c_input_args->bcol_module;
mca_bcol_basesmuma_component_t *cs = &mca_bcol_basesmuma_component;
int i;
int group_size;
int my_rank;
int leading_dim, buff_idx, idx;
int count=input_args->count;
struct ompi_datatype_t* dtype=input_args->dtype;
int64_t sequence_number=input_args->sequence_num;
int radix = cs->k_nomial_radix;
int radix_mask;
int relative_rank;
int pow_k_group_size;
volatile int8_t ready_flag;
int bcol_id = (int) bcol_module->super.bcol_id;
volatile mca_bcol_basesmuma_payload_t *data_buffs;
volatile void* parent_data_pointer;
volatile mca_bcol_basesmuma_header_t *child_ctl_pointer;
volatile mca_bcol_basesmuma_header_t *my_ctl_pointer;
size_t pack_len = 0;
void *data_addr = (void *)((unsigned char *)input_args->src_desc->data_addr +
input_args->sbuf_offset);
#if 0
fprintf(stderr,"Entering nb-sm broadcast input_args->sbuf_offset %d \n",input_args->sbuf_offset);
fflush(stderr);
#endif
/* we will work only on packed data - so compute the length*/
pack_len = mca_bcol_base_get_buff_length(dtype, count);
buff_idx = input_args->buffer_index;
/* Get addressing information */
my_rank = bcol_module->super.sbgp_partner_module->my_index;
group_size = bcol_module->colls_no_user_data.size_of_group;
leading_dim=bcol_module->colls_no_user_data.size_of_group;
idx=SM_ARRAY_INDEX(leading_dim,buff_idx,0);
/* get pow_k_levels and pow_k_group_size */
pow_k_group_size = bcol_module->pow_k;
data_buffs=(volatile mca_bcol_basesmuma_payload_t *)
bcol_module->colls_with_user_data.data_buffs+idx;
/* Set pointer to current proc ctrl region */
my_ctl_pointer = data_buffs[my_rank].ctl_struct;
BASESMUMA_HEADER_INIT(my_ctl_pointer, ready_flag, sequence_number, bcol_id);
/* non-blocking broadcast algorithm */
/* If I am the root, then signal ready flag */
if(input_args->root_flag) {
BASESMUMA_VERBOSE(10,("I am the root of the data"));
/*
* set the radix_mask */
radix_mask = pow_k_group_size;
/* send to children */
opal_atomic_wmb ();
BASESMUMA_K_NOMIAL_SEND_CHILDREN(radix_mask,
radix,0,
my_rank,group_size, ready_flag);
/* root is finished */
goto Release;
}
/* If I am not the root, then poll on possible "senders'" control structs */
for( i = 0; i < cs->num_to_probe; i++) {
if( ready_flag == my_ctl_pointer->flags[BCAST_FLAG][bcol_id]) {
/* else, we found our root within the group ... */
parent_data_pointer = data_buffs[my_ctl_pointer->src].payload;
BASESMUMA_VERBOSE(5,("%d found it from %d \n",my_rank,my_ctl_pointer->src));
/* memcopy the data */
memcpy(data_addr, (void *) parent_data_pointer, pack_len);
/* compute my relative rank */
relative_rank = (my_rank - my_ctl_pointer->src) < 0 ? my_rank -
my_ctl_pointer->src + group_size : my_rank - my_ctl_pointer->src;
/* compute my radix mask */
radix_mask = 1;
while(radix_mask < group_size ){
if( 0 != relative_rank % (radix*radix_mask)) {
/* found it */
break;
}
radix_mask *= radix;
}
/* go one step back */
radix_mask /= radix;
/* send to children */
opal_atomic_wmb ();
BASESMUMA_K_NOMIAL_SEND_CHILDREN(radix_mask,
radix, relative_rank,
my_rank, group_size, ready_flag);
/* bail */
goto Release;
}
}
/* If not matched, then hop out and put me on progress list */
BASESMUMA_VERBOSE(10,("Shared memory probe didn't find a match"));
/*fprintf(stderr,"bcol_id %d Not started\n",bcol_id);*/
return BCOL_FN_NOT_STARTED;
Release:
my_ctl_pointer->starting_flag_value[bcol_id]++;
return BCOL_FN_COMPLETE;
}
/* non-blocking binary scatter allgather anyroot algorithm for large data
* broadcast
*/
#if 0
/* prototype code for shared memory scatter/allgather algorithm. Signaling scheme
* works, should be used as a reference for other types of shared memory scatter/allgather
* algorithms.
*/
int bcol_basesmuma_binary_scatter_allgather_segment(bcol_function_args_t *input_args,
mca_bcol_base_function_t *c_input_args)
{
/* local variables */
int i, j;
int length;
int start;
int my_rank, parent_rank;
int partner;
int src = -1;
int matched = 0;
int group_size;
int first_instance=0;
int leading_dim, buff_idx, idx;
int64_t sequence_number=input_args->sequence_num;
int64_t ready_flag;
int64_t local_offset;
int flag_offset;
int pow_2, pow_2_levels;
int index = -1;
mca_bcol_basesmuma_component_t *cs = &mca_bcol_basesmuma_component;
mca_bcol_basesmuma_module_t *bcol_module =
(mca_bcol_basesmuma_module_t *) c_input_args->bcol_module;
/* use the old control structs for large messages,
* otherwise we will destroy the shared memory
* optimization
*/
mca_bcol_basesmuma_ctl_struct_t **ctl_structs;
mca_bcol_basesmuma_ctl_struct_t *my_ctl_pointer;
mca_bcol_basesmuma_ctl_struct_t *parent_ctl_pointer; /* binomial fanout */
mca_bcol_basesmuma_ctl_struct_t *partner_ctl_pointer; /* recursive double */
/* for now, we use the payload buffer for single fragment */
volatile mca_bcol_basesmuma_payload_t *data_buffs;
volatile void *parent_data_pointer; /* binomial scatter */
volatile void *partner_data_pointer; /* recursive double */
uint32_t fragment_size; /* ml buffer size for now */
/* we will transfer the entire buffer,
* so start at the base address of the ml buffer
*/
void *data_addr = (void *) ((unsigned char *) input_args->src_desc->base_data_addr);
#if 0
fprintf(stderr,"AAA Entering nb-sm large msg broadcast input_args->frag_size %d \n",input_args->frag_size);
fflush(stderr);
#endif
buff_idx = input_args->src_desc->buffer_index;
group_size = bcol_module->colls_no_user_data.size_of_group;
leading_dim=bcol_module->colls_no_user_data.size_of_group;
/* get the largest power of two that is smaller than
* or equal to the group size
*/
pow_2_levels = bcol_module->pow_2_levels;
pow_2 = bcol_module->pow_2;
/* get the fragment size
*/
/* still just the size of the entire buffer */
fragment_size = input_args->buffer_size;
idx=SM_ARRAY_INDEX(leading_dim,buff_idx,0);
my_rank = bcol_module->super.sbgp_partner_module->my_index;
/* grab the control structs */
ctl_structs = (mca_bcol_basesmuma_ctl_struct_t **)
bcol_module->colls_with_user_data.ctl_buffs+idx;
/* grab the data buffs */
data_buffs = (mca_bcol_basesmuma_payload_t *)
bcol_module->colls_with_user_data.data_buffs+idx;
my_ctl_pointer = ctl_structs[my_rank];
if(my_ctl_pointer->sequence_number < sequence_number) {
first_instance = 1;
}
if(first_instance) {
my_ctl_pointer->flag = -1;
my_ctl_pointer->index = 1;
my_ctl_pointer->starting_flag_value = 0;
flag_offset = 0;
} else {
my_ctl_pointer->index++;
}
/* increment the starting flag by one and return */
flag_offset = my_ctl_pointer->starting_flag_value;
ready_flag = flag_offset + sequence_number + 1;
my_ctl_pointer->sequence_number = sequence_number;
/* am I the root */
if(input_args->root_flag) {
/* if I've already been here, then
* hop down to the allgather
*/
if(ALLGATHER == my_ctl_pointer->status) {
goto Allgather;
}
BASESMUMA_VERBOSE(10,("I am the root of the data"));
/* debug print */
/*fprintf(stderr,"I am the root %d\n",my_rank);*/
/*
* signal ready flag
*/
/* set the offset into the buffer */
my_ctl_pointer->offset = 0;
/* how many children do I have */
my_ctl_pointer->n_sends = pow_2_levels;
/* my data length */
my_ctl_pointer->length = fragment_size;
/* important that these be set before my children
* see the ready flag raised
*/
opal_atomic_wmb ();
my_ctl_pointer->flag = ready_flag;
/* root is finished */
if( my_rank < pow_2 ) {
/* if I'm in the power of two group,
* then goto the allgather
*/
my_ctl_pointer->status = ALLGATHER;
goto Allgather;
} else {
/* if I'm not, then I'm done and release */
goto Release;
}
}
/* what phase am I participating in
*/
switch(my_ctl_pointer->status) {
case SCATTER:
goto Scatter;
break;
case ALLGATHER:
goto Allgather;
break;
case EXTRA_RANK:
goto Extra;
break;
default:
break;
}
Extra:
/* am I part of the non-power-of-2 group */
if( my_rank >= pow_2 ) {
/* find parent to copy from */
parent_rank = my_rank&(pow_2-1);
parent_ctl_pointer = ctl_structs[parent_rank];
/* start at the base */
parent_data_pointer = (void *) data_buffs[parent_rank].ctl_struct;
/* now, I need to do some arithmetic to
* arrive at the value everyone else does
* when they have completed the algorithm
*/
/* compute ready flag value to poll on */
ready_flag = ready_flag + pow_2_levels;
/* start to poll */
for( i = 0; i< cs->num_to_probe; i++) {
if(IS_LARGE_DATA_READY(parent_ctl_pointer,ready_flag, sequence_number)) {
/* copy the data and bail */
memcpy(data_addr,(void *)parent_data_pointer,fragment_size);
goto Release;
}
/*
else {
opal_progress();
}
*/
}
my_ctl_pointer->status = EXTRA_RANK;
/* hop out and put me onto a progress queue */
return BCOL_FN_NOT_STARTED;
}
Scatter:
/* on first entry, compute the list of possible sources */
if( NULL == my_ctl_pointer->src_ptr ) {
my_ctl_pointer->src_ptr = (int *) malloc(sizeof(int)*(pow_2_levels+1));
for( i = 0; i < pow_2_levels; i++) {
my_ctl_pointer->src_ptr[i] = my_rank ^ (1<<i);
}
/* am I participating in the non-power of two */
if((my_rank+pow_2) < group_size) {
/* extra rank that I'm paired with */
my_ctl_pointer->src_ptr[i] = my_rank + pow_2;
} else {
/* no extra rank to worry about */
my_ctl_pointer->src_ptr[i] = -1;
}
}
/* If I am not the root, then poll on possible "senders'" control structs */
for( i = 0; i < cs->num_to_probe && 0 == matched; i++) {
/* Shared memory iprobe */
BCOL_BASESMUMA_SM_LARGE_MSG_PROBE(my_ctl_pointer->src_ptr, pow_2_levels+1,
my_rank, matched, src);
}
/* If not matched, then hop out and put me on progress list */
if(0 == matched ) {
BASESMUMA_VERBOSE(10,("Shared memory probe didn't find a match"));
my_ctl_pointer->status = SCATTER;
return BCOL_FN_NOT_STARTED;
} else if ( src >= pow_2 ){
/* If matched from an extra rank, then get the whole message from partner */
memcpy((void *) data_addr, (void *) parent_data_pointer,
parent_ctl_pointer->length);
/* now I am the psuedo-root in the power-of-two group */
my_ctl_pointer->offset = 0;
my_ctl_pointer->length = parent_ctl_pointer->length;
my_ctl_pointer->n_sends = parent_ctl_pointer->n_sends;
/* set the memory barrier */
opal_atomic_wmb ();
/* fire the ready flag */
my_ctl_pointer->flag = ready_flag;
my_ctl_pointer->status = ALLGATHER;
/* go to the allgather */
goto Allgather;
}
/* we need to see whether this is really
* who we are looking for
*/
for( i = 0; i < parent_ctl_pointer->n_sends; i++) {
/* debug print */
/*
fprintf(stderr,"I am %d checking on a hit from %d with n_sends %d\n",my_rank,src,parent_ctl_pointer->n_sends);
fflush(stderr);
*/
/* end debug */
if( my_rank == (src^(1<<i))) {
/* we found our root within the group ... */
BASESMUMA_VERBOSE(10,("Shared memory probe was matched, the root is %d", src));
/* this is who I've been looking for */
my_ctl_pointer->n_sends = i;
if ( i > 0) {
/* compute the size of the chunk to copy */
length = (parent_ctl_pointer->length)/
(1<<(parent_ctl_pointer->n_sends - my_ctl_pointer->n_sends));
my_ctl_pointer->length = length;
my_ctl_pointer->offset =
parent_ctl_pointer->offset+length;
/*fprintf(stderr,"%d's offset %d and length %d \n",my_rank,my_ctl_pointer->offset,length);*/
/* now we can copy the data */
memcpy((void *) ((uint64_t) data_addr+my_ctl_pointer->offset),
(void *) ((uint64_t) parent_data_pointer+(uint64_t) parent_ctl_pointer->offset +
(uint64_t) length),
(size_t)length);
} else {
/* this "trick" takes care of the first level
* of recurssive doubling
*/
length = parent_ctl_pointer->length/
(1<<(parent_ctl_pointer->n_sends - 1));
my_ctl_pointer->length = length;
my_ctl_pointer->offset = parent_ctl_pointer->offset;
/*fprintf(stderr,"%d's offset %d and length %d\n",my_rank,my_ctl_pointer->offset,length);*/
/* now we can copy the data */
memcpy((void *) ((uint64_t) data_addr+my_ctl_pointer->offset),
(void *) ((uint64_t) parent_data_pointer+(uint64_t) my_ctl_pointer->offset),
(size_t)length);
}
/* set the memory barrier to ensure completion */
opal_atomic_wmb ();
/* signal that I am done */
my_ctl_pointer->flag = ready_flag;
/* set my status */
my_ctl_pointer->status = ALLGATHER;
/* time for allgather phase */
goto Allgather;
}
}
/* this is not who we are looking for,
* mark as false positive so we don't
* poll here again
*/
my_ctl_pointer->src_ptr[index] = -1;
/* probably we should jump out and put onto progress list */
my_ctl_pointer->status = SCATTER;
return BCOL_FN_NOT_STARTED;
Allgather:
/* zip it back up - we have already taken care of first level */
/* needed for non-blocking conditional */
matched = 0;
/* get my local_offset */
local_offset = my_ctl_pointer->offset;
/* bump the ready flag */
ready_flag++;
/* first level of zip up */
length = 2*fragment_size/pow_2;
/* first level of zip-up
* already includes first level of
* recursive doubling
*/
start = 1;
/* for non-blocking, check to see if I need to reset the state */
if(my_ctl_pointer->flag >= ready_flag) {
/* then reset the state */
ready_flag = my_ctl_pointer->flag;
start = my_ctl_pointer->start;
/* get the local offset */
local_offset = my_ctl_pointer->offset_zip;
/* compute the correct length */
length = length*(1<<(start - 1));
/* careful! skip over the opal_atomic_wmb () to avoid the
* cost on every re-entry
*/
goto Loop;
}
opal_atomic_wmb ();
/* I am ready, set the flag */
my_ctl_pointer->flag = ready_flag;
Loop:
for( i = start; i < pow_2_levels; i++) {
/* get my partner for this level */
partner = my_rank^(1<<i);
partner_ctl_pointer = ctl_structs[partner];
partner_data_pointer = (void *) data_buffs[partner].ctl_struct;
/* is data ready */
for( j = 0; j < cs->num_to_probe && matched == 0; j++) {
if(IS_LARGE_DATA_READY(partner_ctl_pointer, ready_flag, sequence_number)) {
/* debug prints
fprintf(stderr,"666 I am %d and sequence num is %d partner is %d ready_flag %d parent ready_flag %d buff_idx %d partner_offset %d\n",
my_rank,sequence_number,partner, ready_flag,partner_ctl_pointer->flag,buff_idx,partner_ctl_pointer->offset);
*/
/* debug print */
#if 0
fprintf(stderr,"I am %d and sequence num is %d partner is %d ready_flag %d parent ready_flag %d buff_idx %d \n",
my_rank,sequence_number,partner, ready_flag,parent_ctl_pointer->flag,buff_idx);
#endif
/* end debug prints */
assert(partner_ctl_pointer->flag >= ready_flag);
/* found it */
matched = 1;
/* only copy it, if you sit at a lower level in the tree */
if( my_ctl_pointer->n_sends <= partner_ctl_pointer->n_sends ) {
/* calculate the local offset based on partner's remote offset */
if( partner_ctl_pointer->offset < my_ctl_pointer->offset ) {
/* then I'm looking "up" the tree */
local_offset -= length;
/* debug print */
/*fprintf(stderr,"I am %d and partner is %d partner offset %d length %d \n",my_rank,partner, local_offset,length);*/
/* end debug */
memcpy((void *) ((uint64_t) data_addr + (uint64_t) local_offset),
(void *) ((uint64_t) partner_data_pointer + (uint64_t) local_offset),
length);
} else {
/* I'm looking "down" the tree */
local_offset += length;
/* debug print */
/*fprintf(stderr,"I am %d and partner is %d partner offset %d length %d \n",my_rank,partner, local_offset,length);*/
/* end debug */
memcpy((void *) ((uint64_t) data_addr + (uint64_t) local_offset),
(void *) ((uint64_t) partner_data_pointer + (uint64_t) local_offset),
length);
/* reset my local offset */
local_offset -= length;
}
}
/* bump the ready flag */
ready_flag++;
/* ensure completion */
opal_atomic_wmb ();
/* fire the flag for the next level */
my_ctl_pointer->flag = ready_flag;
/* double the length */
length *= 2;
}
}
/* check to see what kind of progress I've made */
if( 0 == matched ) {
/* save state, hop out and try again later */
my_ctl_pointer->start = i;
/* save the local offset */
my_ctl_pointer->offset_zip = local_offset;
/* put in progress queue */
return BCOL_FN_STARTED;
}
/* else, start next level of recursive doubling */
matched = 0;
}
/* cleanup */
if(NULL != my_ctl_pointer->src_ptr) {
free(my_ctl_pointer->src_ptr);
my_ctl_pointer->src_ptr = NULL;
}
Release:
/* If I am the last instance, release the resource */
/*
if( IS_LAST_BCOL_FUNC(c_input_args)) {
rc = bcol_basesmuma_free_buff(
&(bcol_module->colls_with_user_data),
sequence_number);
}
*/
my_ctl_pointer->starting_flag_value++;
my_ctl_pointer->status = FINISHED;
return BCOL_FN_COMPLETE;
}
#endif
#if 0
int mca_bcol_basesmuma_bcast_binomial_scatter_allgather(void *desc)
{
/* local variables */
int rc, n_frags_sent;
uint32_t stripe_number;
int count, count_processed;
size_t dt_size;
uint32_t n_data_segments_to_schedule;
ompi_datatype_t *dtype;
message_descriptor_t *message_descriptor;
mca_bcol_basesmuma_module_t *bcol_module;
int pipe_depth;
/* get the full message descriptor */
/* compute the number of fragments to send */
/* start to fill the pipeline */
return OMPI_SUCCESS;
}
#endif