ports/openmpi
ports/openmpi
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b59fa14004
openmpi/ompi/mca/io/ompio/io_ompio.c
Mangala Jyothi Bhaskar c4de46e284 Fix number of aggregators used in two phase fcoll
2015-04-16 10:39:10 -05:00

2911 строки
87 KiB
C
Исходник Ответственный История

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2013 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008-2014 University of Houston. All rights reserved.
* Copyright (c) 2011-2015 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2012-2013 Inria. All rights reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/mca/topo/topo.h"
#include "opal/datatype/opal_convertor.h"
#include "opal/datatype/opal_datatype.h"
#include "ompi/datatype/ompi_datatype.h"
#include "ompi/info/info.h"
#include "ompi/request/request.h"
#include <math.h>
#include <unistd.h>
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h> /* or <sys/vfs.h> */
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include "io_ompio.h"
print_queue *coll_write_time=NULL;
print_queue *coll_read_time=NULL;
static int mca_io_ompio_create_groups(mca_io_ompio_file_t *fh,
size_t bytes_per_proc);
static int mca_io_ompio_prepare_to_group(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE **start_offsets_lens,
OMPI_MPI_OFFSET_TYPE **end_offsets,
OMPI_MPI_OFFSET_TYPE **aggr_bytes_per_group,
OMPI_MPI_OFFSET_TYPE *bytes_per_group,
int **decision_list,
size_t bytes_per_proc,
int *is_aggregator,
int *ompio_grouping_flag);
static int mca_io_ompio_retain_initial_groups(mca_io_ompio_file_t *fh);
static int mca_io_ompio_split_initial_groups(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE *start_offsets_lens,
OMPI_MPI_OFFSET_TYPE *end_offsets,
OMPI_MPI_OFFSET_TYPE bytes_per_group);
static int mca_io_ompio_split_a_group(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE *start_offsets_lens,
OMPI_MPI_OFFSET_TYPE *end_offsets,
int size_new_group,
OMPI_MPI_OFFSET_TYPE *max_cci,
OMPI_MPI_OFFSET_TYPE *min_cci,
int *num_groups,
int *size_smallest_group);
static int mca_io_ompio_finalize_split(mca_io_ompio_file_t *fh,
int size_new_group,
int size_last_group);
static int mca_io_ompio_merge_initial_groups(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE *aggr_bytes_per_group,
int *decision_list,
int is_aggregator);
static int mca_io_ompio_merge_groups(mca_io_ompio_file_t *fh,
int *merge_aggrs,
int num_merge_aggrs);
int ompi_io_ompio_set_file_defaults (mca_io_ompio_file_t *fh)
{
if (NULL != fh) {
ompi_datatype_t *types[2], *default_file_view;
int blocklen[2] = {1, 1};
OPAL_PTRDIFF_TYPE d[2], base;
int i;
fh->f_io_array = NULL;
fh->f_perm = OMPIO_PERM_NULL;
fh->f_flags = 0;
fh->f_bytes_per_agg = mca_io_ompio_bytes_per_agg;
fh->f_datarep = strdup ("native");
fh->f_offset = 0;
fh->f_disp = 0;
fh->f_position_in_file_view = 0;
fh->f_index_in_file_view = 0;
fh->f_total_bytes = 0;
fh->f_init_procs_per_group = -1;
fh->f_init_procs_in_group = NULL;
fh->f_procs_per_group = -1;
fh->f_procs_in_group = NULL;
fh->f_init_num_aggrs = -1;
fh->f_init_aggr_list = NULL;
ompi_datatype_create_contiguous(1048576,
&ompi_mpi_byte.dt,
&default_file_view);
ompi_datatype_commit (&default_file_view);
fh->f_etype = &ompi_mpi_byte.dt;
fh->f_filetype = default_file_view;
/* Default file View */
fh->f_iov_type = MPI_DATATYPE_NULL;
fh->f_stripe_size = mca_io_ompio_bytes_per_agg;
/*Decoded iovec of the file-view*/
fh->f_decoded_iov = NULL;
mca_io_ompio_set_view_internal(fh,
0,
&ompi_mpi_byte.dt,
default_file_view,
"native",
fh->f_info);
/*Create a derived datatype for the created iovec */
types[0] = &ompi_mpi_long.dt;
types[1] = &ompi_mpi_long.dt;
d[0] = (OPAL_PTRDIFF_TYPE) fh->f_decoded_iov;
d[1] = (OPAL_PTRDIFF_TYPE) &fh->f_decoded_iov[0].iov_len;
base = d[0];
for (i=0 ; i<2 ; i++) {
d[i] -= base;
}
ompi_datatype_create_struct (2,
blocklen,
d,
types,
&fh->f_iov_type);
ompi_datatype_commit (&fh->f_iov_type);
return OMPI_SUCCESS;
}
else {
return OMPI_ERROR;
}
}
int ompi_io_ompio_generate_current_file_view (struct mca_io_ompio_file_t *fh,
size_t max_data,
struct iovec **f_iov,
int *iov_count)
{
struct iovec *iov = NULL;
size_t bytes_to_write;
size_t sum_previous_counts = 0;
int j, k;
int block = 1;
/* allocate an initial iovec, will grow if needed */
iov = (struct iovec *) malloc
(OMPIO_IOVEC_INITIAL_SIZE * sizeof (struct iovec));
if (NULL == iov) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
sum_previous_counts = fh->f_position_in_file_view;
j = fh->f_index_in_file_view;
bytes_to_write = max_data;
k = 0;
while (bytes_to_write) {
OPAL_PTRDIFF_TYPE disp;
/* reallocate if needed */
if (OMPIO_IOVEC_INITIAL_SIZE*block <= k) {
block ++;
iov = (struct iovec *)realloc
(iov, OMPIO_IOVEC_INITIAL_SIZE *block *sizeof(struct iovec));
if (NULL == iov) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
if (fh->f_decoded_iov[j].iov_len -
(fh->f_total_bytes - sum_previous_counts) <= 0) {
sum_previous_counts += fh->f_decoded_iov[j].iov_len;
j = j + 1;
if (j == (int)fh->f_iov_count) {
j = 0;
sum_previous_counts = 0;
fh->f_offset += fh->f_view_extent;
fh->f_position_in_file_view = sum_previous_counts;
fh->f_index_in_file_view = j;
fh->f_total_bytes = 0;
}
}
disp = (OPAL_PTRDIFF_TYPE)(fh->f_decoded_iov[j].iov_base) +
(fh->f_total_bytes - sum_previous_counts);
iov[k].iov_base = (IOVBASE_TYPE *)(intptr_t)(disp + fh->f_offset);
if ((fh->f_decoded_iov[j].iov_len -
(fh->f_total_bytes - sum_previous_counts))
>= bytes_to_write) {
iov[k].iov_len = bytes_to_write;
}
else {
iov[k].iov_len = fh->f_decoded_iov[j].iov_len -
(fh->f_total_bytes - sum_previous_counts);
}
fh->f_total_bytes += iov[k].iov_len;
bytes_to_write -= iov[k].iov_len;
k = k + 1;
}
fh->f_position_in_file_view = sum_previous_counts;
fh->f_index_in_file_view = j;
*iov_count = k;
*f_iov = iov;
if (mca_io_ompio_record_offset_info){
int tot_entries=0, *recvcounts=NULL, *displs=NULL;
mca_io_ompio_offlen_array_t *per_process=NULL;
mca_io_ompio_offlen_array_t *all_process=NULL;
int *sorted=NULL, *column_list=NULL, *values=NULL;
int *row_index=NULL, i=0, l=0, m=0;
int column_index=0, r_index=0;
int blocklen[3] = {1, 1, 1};
OPAL_PTRDIFF_TYPE d[3], base;
ompi_datatype_t *types[3];
ompi_datatype_t *io_array_type=MPI_DATATYPE_NULL;
int **adj_matrix=NULL;
FILE *fp;
recvcounts = (int *) malloc (fh->f_size * sizeof(int));
if (NULL == recvcounts){
return OMPI_ERR_OUT_OF_RESOURCE;
}
displs = (int *) malloc (fh->f_size * sizeof(int));
if (NULL == displs){
return OMPI_ERR_OUT_OF_RESOURCE;
}
fh->f_comm->c_coll.coll_gather (&k,
1,
MPI_INT,
recvcounts,
1,
MPI_INT,
OMPIO_ROOT,
fh->f_comm,
fh->f_comm->c_coll.coll_gather_module);
per_process = (mca_io_ompio_offlen_array_t *)
malloc (k * sizeof(mca_io_ompio_offlen_array_t));
if (NULL == per_process){
opal_output(1,"Error while allocating per process!\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i=0;i<k;i++){
per_process[i].offset =
(OMPI_MPI_OFFSET_TYPE)(intptr_t)iov[i].iov_base;
per_process[i].length =
(MPI_Aint)iov[i].iov_len;
per_process[i].process_id = fh->f_rank;
}
types[0] = &ompi_mpi_long.dt;
types[1] = &ompi_mpi_long.dt;
types[2] = &ompi_mpi_int.dt;
d[0] = (OPAL_PTRDIFF_TYPE)&per_process[0];
d[1] = (OPAL_PTRDIFF_TYPE)&per_process[0].length;
d[2] = (OPAL_PTRDIFF_TYPE)&per_process[0].process_id;
base = d[0];
for (i=0;i<3;i++){
d[i] -= base;
}
ompi_datatype_create_struct (3,
blocklen,
d,
types,
&io_array_type);
ompi_datatype_commit (&io_array_type);
if (OMPIO_ROOT == fh->f_rank){
tot_entries = recvcounts[0];
displs[0] = 0;
for(i=1;i<fh->f_size;i++){
displs[i] = displs[i-1] + recvcounts[i-1];
tot_entries += recvcounts[i];
}
all_process = (mca_io_ompio_offlen_array_t *)
malloc (tot_entries * sizeof(mca_io_ompio_offlen_array_t));
if (NULL == all_process){
opal_output(1,"Error while allocating per process!\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
sorted = (int *) malloc
(tot_entries * sizeof(int));
if (NULL == sorted){
opal_output(1,"Error while allocating per process!\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
adj_matrix = (int **) malloc (fh->f_size *
sizeof(int *));
for (i=0;i<fh->f_size;i++){
adj_matrix[i] = (int *) malloc (fh->f_size *
sizeof (int ));
}
for (i=0;i<fh->f_size;i++){
for (j=0;j<fh->f_size;j++){
adj_matrix[i][j] = 0;
}
}
}
fh->f_comm->c_coll.coll_gatherv (per_process,
k,
io_array_type,
all_process,
recvcounts,
displs,
io_array_type,
OMPIO_ROOT,
fh->f_comm,
fh->f_comm->c_coll.coll_gatherv_module);
ompi_datatype_destroy(&io_array_type);
if (OMPIO_ROOT == fh->f_rank){
ompi_io_ompio_sort_offlen(all_process,
tot_entries,
sorted);
for (i=0;i<tot_entries-1;i++){
j = all_process[sorted[i]].process_id;
l = all_process[sorted[i+1]].process_id;
adj_matrix[j][l] += 1;
adj_matrix[l][j] += 1;
}
/*Compress sparse matrix based on CRS to write to file */
m = 0;
for (i=0; i<fh->f_size; i++){
for (j=0; j<fh->f_size; j++){
if (adj_matrix[i][j] > 0){
m++;
}
}
}
fp = fopen("fileview_info.out", "w+");
fprintf(fp,"FILEVIEW\n");
column_list = (int *) malloc ( m * sizeof(int));
if (NULL == column_list){
opal_output(1,"Error while allocating column list\n");
fclose(fp);
return OMPI_ERR_OUT_OF_RESOURCE;
}
values = (int *) malloc ( m * sizeof(int));
if (NULL == values){
opal_output(1,"Error while allocating values list\n");
free(column_list);
fclose(fp);
return OMPI_ERR_OUT_OF_RESOURCE;
}
row_index = (int *) malloc ((fh->f_size + 1) *
sizeof(int));
if (NULL == row_index){
opal_output(1,"Error while allocating row_index list\n");
free(values);
free(column_list);
fclose(fp);
return OMPI_ERR_OUT_OF_RESOURCE;
}
fprintf(fp,"%d %d\n", m, fh->f_size+1);
column_index = 0;
r_index = 1;
row_index[0] = r_index;
for (i=0; i<fh->f_size; i++){
for (j=0; j<fh->f_size; j++){
if (adj_matrix[i][j] > 0){
values[column_index]= adj_matrix[i][j];
column_list[column_index]= j;
fprintf(fp,"%d ", column_list[column_index]);
column_index++;
r_index++;
}
}
row_index[i+1]= r_index;
}
fprintf(fp,"\n");
for (i=0; i<m;i++){
fprintf(fp, "%d ", values[i]);
}
fprintf(fp, "\n");
for (i=0; i< (fh->f_size + 1); i++){
fprintf(fp, "%d ", row_index[i]);
}
fprintf(fp, "\n");
fclose(fp);
if (NULL != recvcounts){
free(recvcounts);
recvcounts = NULL;
}
if (NULL != displs){
free(displs);
displs = NULL;
}
if (NULL != sorted){
free(sorted);
sorted = NULL;
}
if (NULL != per_process){
free(per_process);
per_process = NULL;
}
if (NULL != all_process){
free(all_process);
all_process = NULL;
}
free(column_list);
free(values);
if (NULL != row_index){
free(row_index);
row_index = NULL;
}
if (NULL != adj_matrix){
for (i=0;i<fh->f_size;i++){
free(adj_matrix[i]);
}
free(adj_matrix);
adj_matrix = NULL;
}
}
}
return OMPI_SUCCESS;
}
int ompi_io_ompio_set_explicit_offset (mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE offset)
{
int i = 0;
int k = 0;
if ( fh->f_view_size > 0 ) {
/* starting offset of the current copy of the filew view */
fh->f_offset = (fh->f_view_extent *
((offset*fh->f_etype_size) / fh->f_view_size)) + fh->f_disp;
/* number of bytes used within the current copy of the file view */
fh->f_total_bytes = (offset*fh->f_etype_size) % fh->f_view_size;
i = fh->f_total_bytes;
/* Initialize the block id and the starting offset of the current block
within the current copy of the file view to zero */
fh->f_index_in_file_view = 0;
fh->f_position_in_file_view = 0;
/* determine block id that the offset is located in and
the starting offset of that block */
k = fh->f_decoded_iov[fh->f_index_in_file_view].iov_len;
while (i >= k) {
fh->f_position_in_file_view = k;
fh->f_index_in_file_view++;
k += fh->f_decoded_iov[fh->f_index_in_file_view].iov_len;
}
}
return OMPI_SUCCESS;
}
int ompi_io_ompio_decode_datatype (struct mca_io_ompio_file_t *fh,
ompi_datatype_t *datatype,
int count,
void *buf,
size_t *max_data,
struct iovec **iov,
uint32_t *iovec_count)
{
opal_convertor_t convertor;
size_t remaining_length = 0;
uint32_t i;
uint32_t temp_count;
struct iovec *temp_iov=NULL;
size_t temp_data;
opal_convertor_clone (fh->f_convertor, &convertor, 0);
if (OMPI_SUCCESS != opal_convertor_prepare_for_send (&convertor,
&(datatype->super),
count,
buf)) {
opal_output (1, "Cannot attach the datatype to a convertor\n");
return OMPI_ERROR;
}
if ( 0 == datatype->super.size ) {
*max_data = 0;
*iovec_count = 0;
*iov = NULL;
return OMPI_SUCCESS;
}
remaining_length = count * datatype->super.size;
temp_count = OMPIO_IOVEC_INITIAL_SIZE;
temp_iov = (struct iovec*)malloc(temp_count * sizeof(struct iovec));
if (NULL == temp_iov) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
while (0 == opal_convertor_raw(&convertor,
temp_iov,
&temp_count,
&temp_data)) {
#if 0
printf ("%d: New raw extraction (iovec_count = %d, max_data = %lu)\n",
fh->f_rank,temp_count, (unsigned long)temp_data);
for (i = 0; i < temp_count; i++) {
printf ("%d: \t{%p, %lu}\n",fh->f_rank,
temp_iov[i].iov_base,
(unsigned long)temp_iov[i].iov_len);
}
#endif
*iovec_count = *iovec_count + temp_count;
*max_data = *max_data + temp_data;
*iov = (struct iovec *) realloc (*iov, *iovec_count * sizeof(struct iovec));
if (NULL == *iov) {
opal_output(1, "OUT OF MEMORY\n");
free(temp_iov);
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i=0 ; i<temp_count ; i++) {
(*iov)[i+(*iovec_count-temp_count)].iov_base = temp_iov[i].iov_base;
(*iov)[i+(*iovec_count-temp_count)].iov_len = temp_iov[i].iov_len;
}
remaining_length -= temp_data;
temp_count = OMPIO_IOVEC_INITIAL_SIZE;
}
#if 0
printf ("%d: LAST raw extraction (iovec_count = %d, max_data = %d)\n",
fh->f_rank,temp_count, temp_data);
for (i = 0; i < temp_count; i++) {
printf ("%d: \t offset[%d]: %ld; length[%d]: %ld\n", fh->f_rank,i,temp_iov[i].iov_base, i,temp_iov[i].iov_len);
}
#endif
*iovec_count = *iovec_count + temp_count;
*max_data = *max_data + temp_data;
if ( temp_count > 0 ) {
*iov = (struct iovec *) realloc (*iov, *iovec_count * sizeof(struct iovec));
if (NULL == *iov) {
opal_output(1, "OUT OF MEMORY\n");
free(temp_iov);
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
for (i=0 ; i<temp_count ; i++) {
(*iov)[i+(*iovec_count-temp_count)].iov_base = temp_iov[i].iov_base;
(*iov)[i+(*iovec_count-temp_count)].iov_len = temp_iov[i].iov_len;
}
remaining_length -= temp_data;
#if 0
if (0 == fh->f_rank) {
printf ("%d Entries: \n",*iovec_count);
for (i=0 ; i<*iovec_count ; i++) {
printf ("\t{%p, %d}\n",
(*iov)[i].iov_base,
(*iov)[i].iov_len);
}
}
#endif
if (remaining_length != 0) {
printf( "Not all raw description was been extracted (%lu bytes missing)\n",
(unsigned long) remaining_length );
}
free (temp_iov);
return OMPI_SUCCESS;
}
int ompi_io_ompio_sort (mca_io_ompio_io_array_t *io_array,
int num_entries,
int *sorted)
{
int i = 0;
int j = 0;
int left = 0;
int right = 0;
int largest = 0;
int heap_size = num_entries - 1;
int temp = 0;
unsigned char done = 0;
int* temp_arr = NULL;
temp_arr = (int*)malloc(num_entries*sizeof(int));
if (NULL == temp_arr) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
temp_arr[0] = 0;
for (i = 1; i < num_entries; ++i) {
temp_arr[i] = i;
}
/* num_entries can be a large no. so NO RECURSION */
for (i = num_entries/2-1 ; i>=0 ; i--) {
done = 0;
j = i;
largest = j;
while (!done) {
left = j*2+1;
right = j*2+2;
if ((left <= heap_size) &&
(io_array[temp_arr[left]].offset > io_array[temp_arr[j]].offset)) {
largest = left;
}
else {
largest = j;
}
if ((right <= heap_size) &&
(io_array[temp_arr[right]].offset >
io_array[temp_arr[largest]].offset)) {
largest = right;
}
if (largest != j) {
temp = temp_arr[largest];
temp_arr[largest] = temp_arr[j];
temp_arr[j] = temp;
j = largest;
}
else {
done = 1;
}
}
}
for (i = num_entries-1; i >=1; --i) {
temp = temp_arr[0];
temp_arr[0] = temp_arr[i];
temp_arr[i] = temp;
heap_size--;
done = 0;
j = 0;
largest = j;
while (!done) {
left = j*2+1;
right = j*2+2;
if ((left <= heap_size) &&
(io_array[temp_arr[left]].offset >
io_array[temp_arr[j]].offset)) {
largest = left;
}
else {
largest = j;
}
if ((right <= heap_size) &&
(io_array[temp_arr[right]].offset >
io_array[temp_arr[largest]].offset)) {
largest = right;
}
if (largest != j) {
temp = temp_arr[largest];
temp_arr[largest] = temp_arr[j];
temp_arr[j] = temp;
j = largest;
}
else {
done = 1;
}
}
sorted[i] = temp_arr[i];
}
sorted[0] = temp_arr[0];
if (NULL != temp_arr) {
free(temp_arr);
temp_arr = NULL;
}
return OMPI_SUCCESS;
}
int ompi_io_ompio_sort_iovec (struct iovec *iov,
int num_entries,
int *sorted)
{
int i = 0;
int j = 0;
int left = 0;
int right = 0;
int largest = 0;
int heap_size = num_entries - 1;
int temp = 0;
unsigned char done = 0;
int* temp_arr = NULL;
if (0 == num_entries) {
return OMPI_SUCCESS;
}
temp_arr = (int*)malloc(num_entries*sizeof(int));
if (NULL == temp_arr) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
temp_arr[0] = 0;
for (i = 1; i < num_entries; ++i) {
temp_arr[i] = i;
}
/* num_entries can be a large no. so NO RECURSION */
for (i = num_entries/2-1 ; i>=0 ; i--) {
done = 0;
j = i;
largest = j;
while (!done) {
left = j*2+1;
right = j*2+2;
if ((left <= heap_size) &&
(iov[temp_arr[left]].iov_base > iov[temp_arr[j]].iov_base)) {
largest = left;
}
else {
largest = j;
}
if ((right <= heap_size) &&
(iov[temp_arr[right]].iov_base >
iov[temp_arr[largest]].iov_base)) {
largest = right;
}
if (largest != j) {
temp = temp_arr[largest];
temp_arr[largest] = temp_arr[j];
temp_arr[j] = temp;
j = largest;
}
else {
done = 1;
}
}
}
for (i = num_entries-1; i >=1; --i) {
temp = temp_arr[0];
temp_arr[0] = temp_arr[i];
temp_arr[i] = temp;
heap_size--;
done = 0;
j = 0;
largest = j;
while (!done) {
left = j*2+1;
right = j*2+2;
if ((left <= heap_size) &&
(iov[temp_arr[left]].iov_base >
iov[temp_arr[j]].iov_base)) {
largest = left;
}
else {
largest = j;
}
if ((right <= heap_size) &&
(iov[temp_arr[right]].iov_base >
iov[temp_arr[largest]].iov_base)) {
largest = right;
}
if (largest != j) {
temp = temp_arr[largest];
temp_arr[largest] = temp_arr[j];
temp_arr[j] = temp;
j = largest;
}
else {
done = 1;
}
}
sorted[i] = temp_arr[i];
}
sorted[0] = temp_arr[0];
if (NULL != temp_arr) {
free(temp_arr);
temp_arr = NULL;
}
return OMPI_SUCCESS;
}
int ompi_io_ompio_sort_offlen (mca_io_ompio_offlen_array_t *io_array,
int num_entries,
int *sorted){
int i = 0;
int j = 0;
int left = 0;
int right = 0;
int largest = 0;
int heap_size = num_entries - 1;
int temp = 0;
unsigned char done = 0;
int* temp_arr = NULL;
temp_arr = (int*)malloc(num_entries*sizeof(int));
if (NULL == temp_arr) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
temp_arr[0] = 0;
for (i = 1; i < num_entries; ++i) {
temp_arr[i] = i;
}
/* num_entries can be a large no. so NO RECURSION */
for (i = num_entries/2-1 ; i>=0 ; i--) {
done = 0;
j = i;
largest = j;
while (!done) {
left = j*2+1;
right = j*2+2;
if ((left <= heap_size) &&
(io_array[temp_arr[left]].offset > io_array[temp_arr[j]].offset)) {
largest = left;
}
else {
largest = j;
}
if ((right <= heap_size) &&
(io_array[temp_arr[right]].offset >
io_array[temp_arr[largest]].offset)) {
largest = right;
}
if (largest != j) {
temp = temp_arr[largest];
temp_arr[largest] = temp_arr[j];
temp_arr[j] = temp;
j = largest;
}
else {
done = 1;
}
}
}
for (i = num_entries-1; i >=1; --i) {
temp = temp_arr[0];
temp_arr[0] = temp_arr[i];
temp_arr[i] = temp;
heap_size--;
done = 0;
j = 0;
largest = j;
while (!done) {
left = j*2+1;
right = j*2+2;
if ((left <= heap_size) &&
(io_array[temp_arr[left]].offset >
io_array[temp_arr[j]].offset)) {
largest = left;
}
else {
largest = j;
}
if ((right <= heap_size) &&
(io_array[temp_arr[right]].offset >
io_array[temp_arr[largest]].offset)) {
largest = right;
}
if (largest != j) {
temp = temp_arr[largest];
temp_arr[largest] = temp_arr[j];
temp_arr[j] = temp;
j = largest;
}
else {
done = 1;
}
}
sorted[i] = temp_arr[i];
}
sorted[0] = temp_arr[0];
if (NULL != temp_arr) {
free(temp_arr);
temp_arr = NULL;
}
return OMPI_SUCCESS;
}
int ompi_io_ompio_set_aggregator_props (struct mca_io_ompio_file_t *fh,
int num_aggregators,
size_t bytes_per_proc)
{
int j,procs_per_group = 0;
/*If only one process used, no need to do aggregator selection!*/
if (fh->f_size == 1){
num_aggregators = 1;
}
fh->f_flags |= OMPIO_AGGREGATOR_IS_SET;
if (-1 == num_aggregators) {
mca_io_ompio_create_groups(fh,bytes_per_proc);
return OMPI_SUCCESS;
}
//Forced number of aggregators
else
{
/* calculate the offset at which each group of processes will start */
procs_per_group = ceil ((float)fh->f_size/num_aggregators);
/* calculate the number of processes in the local group */
if (fh->f_size/procs_per_group != fh->f_rank/procs_per_group) {
fh->f_procs_per_group = procs_per_group;
}
else {
fh->f_procs_per_group = fh->f_size%procs_per_group;
}
fh->f_procs_in_group = (int*)malloc (fh->f_procs_per_group * sizeof(int));
if (NULL == fh->f_procs_in_group) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (j=0 ; j<fh->f_procs_per_group ; j++) {
fh->f_procs_in_group[j] = (fh->f_rank/procs_per_group) * procs_per_group + j;
}
fh->f_aggregator_index = 0;
return OMPI_SUCCESS;
}
}
int ompi_io_ompio_break_file_view (mca_io_ompio_file_t *fh,
struct iovec *iov,
int count,
int stripe_count,
size_t stripe_size,
struct iovec **broken_iov,
int *broken_count)
{
struct iovec *temp_iov = NULL;
int i = 0;
int k = 0;
int block = 1;
int broken = 0;
size_t remaining = 0;
size_t temp = 0;
OPAL_PTRDIFF_TYPE current_offset = 0;
/* allocate an initial iovec, will grow if needed */
temp_iov = (struct iovec *) malloc
(count * sizeof (struct iovec));
if (NULL == temp_iov) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
while (i < count) {
if (count*block <= k) {
block ++;
temp_iov = (struct iovec *)realloc
(temp_iov, count * block *sizeof(struct iovec));
if (NULL == temp_iov) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
if (0 == broken) {
temp = (OPAL_PTRDIFF_TYPE)(iov[i].iov_base)%stripe_size;
if ((stripe_size-temp) >= iov[i].iov_len) {
temp_iov[k].iov_base = iov[i].iov_base;
temp_iov[k].iov_len = iov[i].iov_len;
i++;
k++;
}
else {
temp_iov[k].iov_base = iov[i].iov_base;
temp_iov[k].iov_len = stripe_size-temp;
current_offset = (OPAL_PTRDIFF_TYPE)(temp_iov[k].iov_base) +
temp_iov[k].iov_len;
remaining = iov[i].iov_len - temp_iov[k].iov_len;
k++;
broken ++;
}
continue;
}
temp = current_offset%stripe_size;
if ((stripe_size-temp) >= remaining) {
temp_iov[k].iov_base = (IOVBASE_TYPE *)current_offset;
temp_iov[k].iov_len = remaining;
i++;
k++;
broken = 0;
current_offset = 0;
remaining = 0;
}
else {
temp_iov[k].iov_base = (IOVBASE_TYPE *)current_offset;
temp_iov[k].iov_len = stripe_size-temp;
current_offset += temp_iov[k].iov_len;
remaining -= temp_iov[k].iov_len;
k++;
broken ++;
}
}
*broken_iov = temp_iov;
*broken_count = k;
return 1;
}
int ompi_io_ompio_distribute_file_view (mca_io_ompio_file_t *fh,
struct iovec *broken_iov,
int broken_count,
int num_aggregators,
size_t stripe_size,
int **fview_count,
struct iovec **iov,
int *count)
{
int *num_entries;
int *broken_index;
int temp = 0;
int *fview_cnt = NULL;
int global_fview_count = 0;
int i = 0;
int *displs = NULL;
int rc = OMPI_SUCCESS;
struct iovec *global_fview = NULL;
struct iovec **broken = NULL;
MPI_Request *req=NULL, *sendreq=NULL;
num_entries = (int *) malloc (sizeof (int) * num_aggregators);
if (NULL == num_entries) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
broken_index = (int *) malloc (sizeof (int) * num_aggregators);
if (NULL == broken_index) {
opal_output (1, "OUT OF MEMORY\n");
free(num_entries);
return OMPI_ERR_OUT_OF_RESOURCE;
}
memset (num_entries, 0x0, num_aggregators * sizeof (int));
memset (broken_index, 0x0, num_aggregators * sizeof (int));
/* calculate how many entries in the broken iovec belong to each aggregator */
for (i=0 ; i<broken_count ; i++) {
temp = (int)((OPAL_PTRDIFF_TYPE)broken_iov[i].iov_base/stripe_size) %
num_aggregators;
num_entries [temp] ++;
}
if (0 == fh->f_rank%fh->f_aggregator_index) {
fview_cnt = (int *) malloc (sizeof (int) * fh->f_size);
if (NULL == fview_cnt) {
opal_output (1, "OUT OF MEMORY\n");
free(num_entries);
free(broken_index);
return OMPI_ERR_OUT_OF_RESOURCE;
}
req = (MPI_Request *)malloc (fh->f_size * sizeof(MPI_Request));
if (NULL == req) {
free(num_entries);
free(broken_index);
free(fview_cnt);
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
sendreq = (MPI_Request *)malloc (num_aggregators * sizeof(MPI_Request));
if (NULL == sendreq) {
free(num_entries);
free(broken_index);
if (0 == fh->f_rank%fh->f_aggregator_index) {
free(fview_cnt);
free(req);
}
return OMPI_ERR_OUT_OF_RESOURCE;
}
/* gather at each aggregator how many entires from the broken file view it
expects from each process */
if (0 == fh->f_rank%fh->f_aggregator_index) {
for (i=0; i<fh->f_size ; i++) {
rc = MCA_PML_CALL(irecv(&fview_cnt[i],
1,
MPI_INT,
i,
OMPIO_TAG_GATHER,
fh->f_comm,
&req[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
for (i=0 ; i<num_aggregators ; i++) {
rc = MCA_PML_CALL(isend(&num_entries[i],
1,
MPI_INT,
i*fh->f_aggregator_index,
OMPIO_TAG_GATHER,
MCA_PML_BASE_SEND_STANDARD,
fh->f_comm,
&sendreq[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
if (0 == fh->f_rank%fh->f_aggregator_index) {
rc = ompi_request_wait_all (fh->f_size, req, MPI_STATUSES_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
rc = ompi_request_wait_all (num_aggregators, sendreq, MPI_STATUSES_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
/*
for (i=0 ; i<num_aggregators ; i++) {
fh->f_comm->c_coll.coll_gather (&num_entries[i],
1,
MPI_INT,
fview_cnt,
1,
MPI_INT,
i*fh->f_aggregator_index,
fh->f_comm,
fh->f_comm->c_coll.coll_gather_module);
}
*/
if (0 == fh->f_rank%fh->f_aggregator_index) {
displs = (int*) malloc (fh->f_size * sizeof (int));
if (NULL == displs) {
opal_output (1, "OUT OF MEMORY\n");
free(num_entries);
free(broken_index);
return OMPI_ERR_OUT_OF_RESOURCE;
}
displs[0] = 0;
global_fview_count = fview_cnt[0];
for (i=1 ; i<fh->f_size ; i++) {
global_fview_count += fview_cnt[i];
displs[i] = displs[i-1] + fview_cnt[i-1];
}
if (global_fview_count) {
global_fview = (struct iovec*)malloc (global_fview_count *
sizeof(struct iovec));
if (NULL == global_fview) {
opal_output (1, "OUT OF MEMORY\n");
free(num_entries);
free(broken_index);
free(displs);
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
}
broken = (struct iovec**)malloc (num_aggregators * sizeof(struct iovec *));
if (NULL == broken) {
opal_output (1, "OUT OF MEMORY\n");
free(num_entries);
free(broken_index);
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i=0 ; i<num_aggregators ; i++) {
broken[i] = NULL;
if (0 != num_entries[i]) {
broken[i] = (struct iovec*) malloc (num_entries[i] *
sizeof (struct iovec));
if (NULL == broken[i]) {
int j;
opal_output (1, "OUT OF MEMORY\n");
free(num_entries);
free(broken_index);
for (j=0; j<i; j++) {
free(broken[j]);
}
free(broken);
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
}
for (i=0 ; i<broken_count ; i++) {
temp = (int)((OPAL_PTRDIFF_TYPE)broken_iov[i].iov_base/stripe_size) %
num_aggregators;
broken[temp][broken_index[temp]].iov_base = broken_iov[i].iov_base;
broken[temp][broken_index[temp]].iov_len = broken_iov[i].iov_len;
broken_index[temp] ++;
}
/*
for (i=0 ; i<num_aggregators ; i++) {
int j;
for (j=0 ; j<num_entries[i] ; j++) {
printf("%d->%d: OFFSET: %d LENGTH: %d\n",
fh->f_rank,
i,
broken[i][j].iov_base,
broken[i][j].iov_len);
}
}
sleep(1);
*/
if (0 == fh->f_rank%fh->f_aggregator_index) {
ptrdiff_t lb, extent;
rc = ompi_datatype_get_extent(fh->f_iov_type, &lb, &extent);
if (OMPI_SUCCESS != rc) {
goto exit;
}
for (i=0; i<fh->f_size ; i++) {
if (fview_cnt[i]) {
char *ptmp;
ptmp = ((char *) global_fview) + (extent * displs[i]);
rc = MCA_PML_CALL(irecv(ptmp,
fview_cnt[i],
fh->f_iov_type,
i,
OMPIO_TAG_GATHERV,
fh->f_comm,
&req[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
}
for (i=0 ; i<num_aggregators ; i++) {
if (num_entries[i]) {
rc = MCA_PML_CALL(isend(broken[i],
num_entries[i],
fh->f_iov_type,
i*fh->f_aggregator_index,
OMPIO_TAG_GATHERV,
MCA_PML_BASE_SEND_STANDARD,
fh->f_comm,
&sendreq[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
if (0 == fh->f_rank%fh->f_aggregator_index) {
for (i=0; i<fh->f_size ; i++) {
if (fview_cnt[i]) {
rc = ompi_request_wait (&req[i], MPI_STATUS_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
}
for (i=0; i<num_aggregators ; i++) {
if (num_entries[i]) {
rc = ompi_request_wait (&sendreq[i], MPI_STATUS_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
/*
for (i=0 ; i<num_aggregators ; i++) {
fh->f_comm->c_coll.coll_gatherv (broken[i],
num_entries[i],
fh->f_iov_type,
global_fview,
fview_cnt,
displs,
fh->f_iov_type,
i*fh->f_aggregator_index,
fh->f_comm,
fh->f_comm->c_coll.coll_gatherv_module);
}
*/
/*
for (i=0 ; i<global_fview_count ; i++) {
printf("%d: OFFSET: %d LENGTH: %d\n",
fh->f_rank,
global_fview[i].iov_base,
global_fview[i].iov_len);
}
*/
exit:
for (i=0 ; i<num_aggregators ; i++) {
if (NULL != broken[i]) {
free (broken[i]);
}
}
if (NULL != req) {
free (req);
}
if (NULL != sendreq) {
free (sendreq);
}
if (NULL != broken) {
free (broken);
}
free (num_entries);
free (broken_index);
if (NULL != displs) {
free (displs);
}
*fview_count = fview_cnt;
*iov = global_fview;
*count = global_fview_count;
return rc;
}
int ompi_io_ompio_gather_data (mca_io_ompio_file_t *fh,
void *send_buf,
size_t total_bytes_sent,
int *bytes_sent,
struct iovec *broken_iovec,
int broken_index,
size_t partial,
void *global_buf,
int *bytes_per_process,
int *displs,
int num_aggregators,
size_t stripe_size)
{
void **sbuf = NULL;
size_t bytes_remaining;
size_t *temp_position = NULL;
size_t part;
int current;
int temp = 0;
int i = 0;
int rc = OMPI_SUCCESS;
MPI_Request *req=NULL, *sendreq=NULL;
current = broken_index;
part = partial;
sbuf = (void**) malloc (num_aggregators * sizeof(void *));
if (NULL == sbuf) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
temp_position = (size_t *) malloc (num_aggregators * sizeof(size_t));
if (NULL == temp_position) {
opal_output (1, "OUT OF MEMORY\n");
free(sbuf);
return OMPI_ERR_OUT_OF_RESOURCE;
}
memset (temp_position, 0x0, num_aggregators * sizeof (size_t));
for (i=0 ; i<num_aggregators ; i++) {
sbuf[i] = NULL;
if (0 != bytes_sent[i]) {
sbuf[i] = (void *) malloc (bytes_sent[i]);
if (NULL == sbuf[i]) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
}
bytes_remaining = total_bytes_sent;
while (bytes_remaining) {
temp = (int)((OPAL_PTRDIFF_TYPE)broken_iovec[current].iov_base/stripe_size)
% num_aggregators;
if (part) {
if (bytes_remaining > part) {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)sbuf[temp]+
temp_position[temp]),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)send_buf +
(total_bytes_sent-bytes_remaining)),
part);
bytes_remaining -= part;
temp_position[temp] += part;
part = 0;
current ++;
}
else {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)sbuf[temp]+
temp_position[temp]),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)send_buf +
(total_bytes_sent-bytes_remaining)),
bytes_remaining);
break;
}
}
else {
if (bytes_remaining > broken_iovec[current].iov_len) {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)sbuf[temp]+
temp_position[temp]),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)send_buf +
(total_bytes_sent-bytes_remaining)),
broken_iovec[current].iov_len);
bytes_remaining -= broken_iovec[current].iov_len;
temp_position[temp] += broken_iovec[current].iov_len;
current ++;
}
else {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)sbuf[temp]+
temp_position[temp]),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)send_buf +
(total_bytes_sent-bytes_remaining)),
bytes_remaining);
break;
}
}
}
sendreq = (MPI_Request *)malloc (num_aggregators * sizeof(MPI_Request));
if (NULL == sendreq) {
free(sbuf);
free(temp_position);
return OMPI_ERR_OUT_OF_RESOURCE;
}
if (0 == fh->f_rank%fh->f_aggregator_index) {
req = (MPI_Request *)malloc (fh->f_size * sizeof(MPI_Request));
if (NULL == req) {
free(sbuf);
free(temp_position);
free(sendreq);
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i=0; i<fh->f_size ; i++) {
if (bytes_per_process[i]) {
rc = MCA_PML_CALL(irecv((char *)global_buf + displs[i],
bytes_per_process[i],
MPI_BYTE,
i,
OMPIO_TAG_GATHERV,
fh->f_comm,
&req[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
}
for (i=0 ; i<num_aggregators ; i++) {
if (bytes_sent[i]) {
rc = MCA_PML_CALL(isend(sbuf[i],
bytes_sent[i],
MPI_BYTE,
i*fh->f_aggregator_index,
OMPIO_TAG_GATHERV,
MCA_PML_BASE_SEND_STANDARD,
fh->f_comm,
&sendreq[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
if (0 == fh->f_rank%fh->f_aggregator_index) {
for (i=0; i<fh->f_size ; i++) {
if (bytes_per_process[i]) {
rc = ompi_request_wait (&req[i], MPI_STATUS_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
}
for (i=0; i<num_aggregators ; i++) {
if (bytes_sent[i]) {
rc = ompi_request_wait (&sendreq[i], MPI_STATUS_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
/*
for (i=0 ; i<num_aggregators ; i++) {
fh->f_comm->c_coll.coll_gatherv (sbuf[i],
bytes_sent[i],
MPI_BYTE,
global_buf,
bytes_per_process,
displs,
MPI_BYTE,
i*fh->f_aggregator_index,
fh->f_comm,
fh->f_comm->c_coll.coll_gatherv_module);
}
*/
exit:
for (i=0 ; i<num_aggregators ; i++) {
if (NULL != sbuf[i]) {
free (sbuf[i]);
sbuf[i] = NULL;
}
}
if (NULL != req) {
free (req);
}
if (NULL != sendreq) {
free (sendreq);
}
if (NULL != sbuf) {
free (sbuf);
sbuf = NULL;
}
if (NULL != temp_position) {
free (temp_position);
temp_position = NULL;
}
return rc;
}
int ompi_io_ompio_scatter_data (mca_io_ompio_file_t *fh,
void *receive_buf,
size_t total_bytes_recv,
int *bytes_received,
struct iovec *broken_iovec,
int broken_index,
size_t partial,
void *global_buf,
int *bytes_per_process,
int *displs,
int num_aggregators,
size_t stripe_size)
{
void **rbuf = NULL;
size_t bytes_remaining;
size_t *temp_position = NULL;
size_t part;
int current;
int temp = 0;
int i = 0;
int rc = OMPI_SUCCESS;
MPI_Request *req=NULL, *recvreq=NULL;
current = broken_index;
part = partial;
rbuf = (void**) malloc (num_aggregators * sizeof(void *));
if (NULL == rbuf) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
temp_position = (size_t *) malloc (num_aggregators * sizeof(size_t));
if (NULL == temp_position) {
opal_output (1, "OUT OF MEMORY\n");
free(rbuf);
return OMPI_ERR_OUT_OF_RESOURCE;
}
memset (temp_position, 0x0, num_aggregators * sizeof (size_t));
for (i=0 ; i<num_aggregators ; i++) {
rbuf[i] = NULL;
if (0 != bytes_received[i]) {
rbuf[i] = (void *) malloc (bytes_received[i]);
if (NULL == rbuf[i]) {
int j;
opal_output (1, "OUT OF MEMORY\n");
free(temp_position);
for (j=0; j<i; j++) {
free(rbuf[j]);
}
free(rbuf);
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
}
recvreq = (MPI_Request *)malloc (num_aggregators * sizeof(MPI_Request));
if (NULL == recvreq) {
free(temp_position);
for (i=0; i<num_aggregators; i++) {
free(rbuf[i]);
}
free(rbuf);
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i=0 ; i<num_aggregators ; i++) {
if (bytes_received[i]) {
rc = MCA_PML_CALL(irecv(rbuf[i],
bytes_received[i],
MPI_BYTE,
i*fh->f_aggregator_index,
OMPIO_TAG_SCATTERV,
fh->f_comm,
&recvreq[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
if (0 == fh->f_rank%fh->f_aggregator_index) {
req = (MPI_Request *)malloc (fh->f_size * sizeof(MPI_Request));
if (NULL == req) {
free(temp_position);
for (i=0; i<num_aggregators; i++) {
free(rbuf[i]);
}
free(rbuf);
free(recvreq);
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i=0; i<fh->f_size ; i++) {
if (bytes_per_process[i]) {
rc = MCA_PML_CALL(isend((char *)global_buf + displs[i],
bytes_per_process[i],
MPI_BYTE,
i,
OMPIO_TAG_SCATTERV,
MCA_PML_BASE_SEND_STANDARD,
fh->f_comm,
&req[i]));
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
}
for (i=0; i<num_aggregators ; i++) {
if (bytes_received[i]) {
rc = ompi_request_wait (&recvreq[i], MPI_STATUS_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
if (0 == fh->f_rank%fh->f_aggregator_index) {
for (i=0; i<fh->f_size ; i++) {
if (bytes_per_process[i]) {
rc = ompi_request_wait (&req[i], MPI_STATUS_IGNORE);
if (OMPI_SUCCESS != rc) {
goto exit;
}
}
}
}
/*
for (i=0 ; i<num_aggregators ; i++) {
fh->f_comm->c_coll.coll_scatterv (global_buf,
bytes_per_process,
displs,
MPI_BYTE,
rbuf[i],
bytes_received[i],
MPI_BYTE,
i*fh->f_aggregator_index,
fh->f_comm,
fh->f_comm->c_coll.coll_scatterv_module);
}
*/
bytes_remaining = total_bytes_recv;
while (bytes_remaining) {
temp = (int)((OPAL_PTRDIFF_TYPE)broken_iovec[current].iov_base/stripe_size)
% num_aggregators;
if (part) {
if (bytes_remaining > part) {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)receive_buf +
(total_bytes_recv-bytes_remaining)),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)rbuf[temp]+
temp_position[temp]),
part);
bytes_remaining -= part;
temp_position[temp] += part;
part = 0;
current ++;
}
else {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)receive_buf +
(total_bytes_recv-bytes_remaining)),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)rbuf[temp]+
temp_position[temp]),
bytes_remaining);
break;
}
}
else {
if (bytes_remaining > broken_iovec[current].iov_len) {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)receive_buf +
(total_bytes_recv-bytes_remaining)),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)rbuf[temp]+
temp_position[temp]),
broken_iovec[current].iov_len);
bytes_remaining -= broken_iovec[current].iov_len;
temp_position[temp] += broken_iovec[current].iov_len;
current ++;
}
else {
memcpy ((IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)receive_buf +
(total_bytes_recv-bytes_remaining)),
(IOVBASE_TYPE *)((OPAL_PTRDIFF_TYPE)rbuf[temp]+
temp_position[temp]),
bytes_remaining);
break;
}
}
}
exit:
for (i=0 ; i<num_aggregators ; i++) {
if (NULL != rbuf[i]) {
free (rbuf[i]);
rbuf[i] = NULL;
}
}
if (NULL != req) {
free (req);
}
if (NULL != recvreq) {
free (recvreq);
}
if (NULL != rbuf) {
free (rbuf);
rbuf = NULL;
}
if (NULL != temp_position) {
free (temp_position);
temp_position = NULL;
}
return rc;
}
void mca_io_ompio_get_num_aggregators ( int *num_aggregators)
{
*num_aggregators = mca_io_ompio_num_aggregators;
return;
}
void mca_io_ompio_get_bytes_per_agg ( int *bytes_per_agg)
{
*bytes_per_agg = mca_io_ompio_bytes_per_agg;
return;
}
/* Print queue related function implementations */
int ompi_io_ompio_set_print_queue (print_queue **q,
int queue_type){
int ret = OMPI_SUCCESS;
switch(queue_type) {
case WRITE_PRINT_QUEUE:
*q = coll_write_time;
break;
case READ_PRINT_QUEUE:
*q = coll_read_time;
break;
}
if (NULL == q){
ret = OMPI_ERROR;
}
return ret;
}
int ompi_io_ompio_initialize_print_queue(print_queue *q){
int ret = OMPI_SUCCESS;
q->first = 0;
q->last = QUEUESIZE - 1;
q->count = 0;
return ret;
}
int ompi_io_ompio_register_print_entry (int queue_type,
print_entry x){
int ret = OMPI_SUCCESS;
print_queue *q=NULL;
ret = ompi_io_ompio_set_print_queue(&q, queue_type);
if (ret != OMPI_ERROR){
if (q->count >= QUEUESIZE){
return OMPI_ERROR;
}
else{
q->last = (q->last + 1) % QUEUESIZE;
q->entry[q->last] = x;
q->count = q->count + 1;
}
}
return ret;
}
int ompi_io_ompio_unregister_print_entry (int queue_type,
print_entry *x){
int ret = OMPI_SUCCESS;
print_queue *q=NULL;
ret = ompi_io_ompio_set_print_queue(&q, queue_type);
if (ret != OMPI_ERROR){
if (q->count <= 0){
return OMPI_ERROR;
}
else{
*x = q->entry[q->first];
q->first = (q->first+1) % QUEUESIZE;
q->count = q->count - 1;
}
}
return OMPI_SUCCESS;
}
int ompi_io_ompio_empty_print_queue(int queue_type){
int ret = OMPI_SUCCESS;
print_queue *q=NULL;
ret = ompi_io_ompio_set_print_queue(&q, queue_type);
assert (ret != OMPI_ERROR);
if (q->count == 0)
return 1;
else
return 0;
}
int ompi_io_ompio_full_print_queue(int queue_type){
int ret = OMPI_SUCCESS;
print_queue *q=NULL;
ret = ompi_io_ompio_set_print_queue(&q, queue_type);
assert ( ret != OMPI_ERROR);
if (q->count < QUEUESIZE)
return 0;
else
return 1;
}
int ompi_io_ompio_print_time_info(int queue_type,
char *name,
mca_io_ompio_file_t *fh){
int i = 0, j=0, nprocs_for_coll = 0, ret = OMPI_SUCCESS, count = 0;
double *time_details = NULL, *final_sum = NULL;
double *final_max = NULL, *final_min = NULL;
double *final_time_details=NULL;
print_queue *q=NULL;
ret = ompi_io_ompio_set_print_queue(&q, queue_type);
assert (ret != OMPI_ERROR);
nprocs_for_coll = q->entry[0].nprocs_for_coll;
time_details = (double *) malloc (4*sizeof(double));
if ( NULL == time_details){
ret = OMPI_ERR_OUT_OF_RESOURCE;
goto exit;
}
if (!fh->f_rank){
final_min = (double *) malloc (3*sizeof(double));
if ( NULL == final_min){
ret = OMPI_ERR_OUT_OF_RESOURCE;
goto exit;
}
final_max = (double *) malloc (3*sizeof(double));
if ( NULL == final_max){
ret = OMPI_ERR_OUT_OF_RESOURCE;
goto exit;
}
final_sum = (double *) malloc (3*sizeof(double));
if ( NULL == final_sum){
ret = OMPI_ERR_OUT_OF_RESOURCE;
goto exit;
}
final_time_details =
(double *)malloc
(fh->f_size * 4 * sizeof(double));
if (NULL == final_time_details){
ret = OMPI_ERR_OUT_OF_RESOURCE;
goto exit;
}
count = 4 * fh->f_size;
for(i=0;i<count;i++){
final_time_details[i] = 0.0;
}
}
for (i = 0; i < 4; i++){
time_details[i] = 0.0;
}
if (q->count > 0){
for (i=0; i < q->count; i++){
for (j=0;j<3;j++){
if (!fh->f_rank){
final_min[j] = 100000.0;
final_max[j] = 0.0;
final_sum[j] = 0.0;
}
time_details[j] += q->entry[i].time[j];
}
time_details[3] = q->entry[i].aggregator;
}
}
fh->f_comm->c_coll.coll_gather(time_details,
4,
MPI_DOUBLE,
final_time_details,
4,
MPI_DOUBLE,
0,
fh->f_comm,
fh->f_comm->c_coll.coll_gather_module);
if (!fh->f_rank){
for (i=0;i<count;i+=4){
if (final_time_details[i+3] == 1){
final_sum[0] += final_time_details[i];
final_sum[1] += final_time_details[i+1];
final_sum[2] += final_time_details[i+2];
if ( final_time_details[i] < final_min[0])
final_min[0] = final_time_details[i];
if ( final_time_details[i+1] < final_min[1])
final_min[1] = final_time_details[i+1];
if ( final_time_details[i+2] < final_min[2])
final_min[2] = final_time_details[i+2];
if ( final_time_details[i] > final_max[0])
final_max[0] = final_time_details[i];
if ( final_time_details[i+1] > final_max[1])
final_max[1] = final_time_details[i+1];
if ( final_time_details[i+2] > final_max[2])
final_max[2] = final_time_details[i+2];
}
}
printf ("\n# MAX-%s AVG-%s MIN-%s MAX-COMM AVG-COMM MIN-COMM",
name, name, name);
printf (" MAX-EXCH AVG-EXCH MIN-EXCH\n");
printf (" %f %f %f %f %f %f %f %f %f\n\n",
final_max[0], final_sum[0]/nprocs_for_coll, final_min[0],
final_max[1], final_sum[1]/nprocs_for_coll, final_min[1],
final_max[2], final_sum[2]/nprocs_for_coll, final_min[2]);
}
exit:
if ( NULL != final_max){
free(final_max);
final_max = NULL;
}
if (NULL != final_min){
free(final_min);
final_min = NULL;
}
if (NULL != final_sum){
free(final_sum);
final_sum = NULL;
}
if (NULL != time_details){
free(time_details);
time_details = NULL;
}
return ret;
}
int mca_io_ompio_create_groups(mca_io_ompio_file_t *fh,
size_t bytes_per_proc)
{
int is_aggregator = 0;
int final_aggr = 0;
int final_num_aggrs = 0;
int ompio_grouping_flag = 0;
int *decision_list = NULL;
OMPI_MPI_OFFSET_TYPE *start_offsets_lens = NULL;
OMPI_MPI_OFFSET_TYPE *end_offsets = NULL;
OMPI_MPI_OFFSET_TYPE bytes_per_group = 0;
OMPI_MPI_OFFSET_TYPE *aggr_bytes_per_group = NULL;
mca_io_ompio_prepare_to_group(fh,
&start_offsets_lens,
&end_offsets,
&aggr_bytes_per_group,
&bytes_per_group,
&decision_list,
bytes_per_proc,
&is_aggregator,
&ompio_grouping_flag);
switch(ompio_grouping_flag){
case OMPIO_SPLIT:
mca_io_ompio_split_initial_groups(fh,
start_offsets_lens,
end_offsets,
bytes_per_group);
break;
case OMPIO_MERGE:
mca_io_ompio_merge_initial_groups(fh,
aggr_bytes_per_group,
decision_list,
is_aggregator);
break;
case OMPIO_RETAIN:
mca_io_ompio_retain_initial_groups(fh);
break;
}
//Set aggregator index
fh->f_aggregator_index = 0;
//Calculate final number of aggregators
if(fh->f_rank == fh->f_procs_in_group[fh->f_aggregator_index]){
final_aggr = 1;
}
fh->f_comm->c_coll.coll_allreduce (&final_aggr,
&final_num_aggrs,
1,
MPI_INT,
MPI_SUM,
fh->f_comm,
fh->f_comm->c_coll.coll_allreduce_module);
//Set final number of aggregators in file handle
fh->f_final_num_aggrs = final_num_aggrs;
//Print final number of aggregators if required
/*if(fh->f_rank == 0){
printf("Rank %d : has final_num_aggrs = %d\n",fh->f_rank,final_num_aggrs);
}*/
//Print final grouping
/*if (fh->f_procs_in_group[fh->f_aggregator_index] == fh->f_rank) {
for (j=0 ; j<fh->f_procs_per_group; j++) {
printf ("%d: Proc %d: %d\n", fh->f_rank, j, fh->f_procs_in_group[j]);
}
printf("\n\n");
}
*/
if (NULL != start_offsets_lens) {
free (start_offsets_lens);
start_offsets_lens = NULL;
}
if (NULL != end_offsets) {
free (end_offsets);
end_offsets = NULL;
}
if(NULL != aggr_bytes_per_group){
free(aggr_bytes_per_group);
aggr_bytes_per_group = NULL;
}
if( NULL != decision_list){
free(decision_list);
decision_list = NULL;
}
return OMPI_SUCCESS;
}
int mca_io_ompio_merge_initial_groups(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE *aggr_bytes_per_group,
int *decision_list,
int is_aggregator){
OMPI_MPI_OFFSET_TYPE sum_bytes = 0;
MPI_Request *sendreq = NULL;
MPI_Request *req = NULL;
int start = 0;
int end = 0;
int i = 0;
int j = 0;
int r = 0;
int merge_pair_flag = 4;
int first_merge_flag = 4;
int *merge_aggrs = NULL;
int is_new_aggregator= 0;
if(is_aggregator){
i = 0;
sum_bytes = 0;
//go through the decision list
//Find the aggregators that could merge
while(i < fh->f_init_num_aggrs){
while(1){
if( i >= fh->f_init_num_aggrs){
break;
}
else if((decision_list[i] == OMPIO_MERGE) &&
(sum_bytes <= mca_io_ompio_bytes_per_agg)){
sum_bytes = sum_bytes + aggr_bytes_per_group[i];
decision_list[i] = merge_pair_flag;
i++;
}
else if((decision_list[i] == OMPIO_MERGE) &&
(sum_bytes >= mca_io_ompio_bytes_per_agg)){
if(decision_list[i+1] == OMPIO_MERGE){
merge_pair_flag++;
decision_list[i] = merge_pair_flag;
sum_bytes = aggr_bytes_per_group[i];
i++;
}
else{
decision_list[i] = merge_pair_flag;
i++;
}
}
else{
i++;
if(decision_list[i] == OMPIO_MERGE)
merge_pair_flag++;
sum_bytes = 0;
break;
}
}
}
//Now go through the new edited decision list and
//make lists of aggregators to merge and number
//of groups to me merged.
i = 0;
j = 0;
while(i < fh->f_init_num_aggrs){
if(decision_list[i] >= first_merge_flag){
start = i;
while((decision_list[i] >= first_merge_flag) &&
(i < fh->f_init_num_aggrs-1)){
if(decision_list[i+1] == decision_list[i]){
i++;
}
else{
break;
}
end = i;
}
merge_aggrs = (int *)malloc((end - start + 1) * sizeof(int));
if (NULL == merge_aggrs) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
j = 0;
for( j = 0 ; j < end - start + 1; j++){
merge_aggrs[j] = fh->f_init_aggr_list[start+j];
}
if(fh->f_rank == merge_aggrs[0])
is_new_aggregator = 1;
for( j = 0 ; j < end-start+1 ;j++){
if(fh->f_rank == merge_aggrs[j]){
mca_io_ompio_merge_groups(fh,
merge_aggrs,
end-start+1);
}
}
if(NULL != merge_aggrs){
free(merge_aggrs);
merge_aggrs = NULL;
}
}
i++;
}
}//end old aggregators
//New aggregators communicate new grouping info to the groups
if(is_new_aggregator){
sendreq = (MPI_Request *)malloc ( 2 *fh->f_procs_per_group * sizeof(MPI_Request));
if (NULL == sendreq) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
//Communicate grouping info
for( j = 0 ; j < fh->f_procs_per_group; j++){
//new aggregator sends new procs_per_group to all its members
MCA_PML_CALL(isend(&fh->f_procs_per_group,
1,
MPI_INT,
fh->f_procs_in_group[j],
OMPIO_PROCS_PER_GROUP_TAG,
MCA_PML_BASE_SEND_STANDARD,
fh->f_comm,
&sendreq[r++]));
//new aggregator sends distribution of process to all its new members
MCA_PML_CALL(isend(fh->f_procs_in_group,
fh->f_procs_per_group,
MPI_INT,
fh->f_procs_in_group[j],
OMPIO_PROCS_IN_GROUP_TAG,
MCA_PML_BASE_SEND_STANDARD,
fh->f_comm,
&sendreq[r++]));
}
}
//All non aggregators
req = (MPI_Request *)malloc (2* sizeof(MPI_Request));
if (NULL == req) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
//All processes receive initial process distribution from aggregators
MCA_PML_CALL(recv(&fh->f_procs_per_group,
1,
MPI_INT,
MPI_ANY_SOURCE,
OMPIO_PROCS_PER_GROUP_TAG,
fh->f_comm,
MPI_STATUS_IGNORE));
fh->f_procs_in_group = (int*)malloc (fh->f_procs_per_group * sizeof(int));
if (NULL == fh->f_procs_in_group) {
opal_output (1, "OUT OF MEMORY\n");
free(req);
return OMPI_ERR_OUT_OF_RESOURCE;
}
MCA_PML_CALL(recv(fh->f_procs_in_group,
fh->f_procs_per_group,
MPI_INT,
MPI_ANY_SOURCE,
OMPIO_PROCS_IN_GROUP_TAG,
fh->f_comm,
MPI_STATUS_IGNORE));
if(NULL != req){
free (req);
req = NULL;
}
if(is_new_aggregator) {
ompi_request_wait_all (r, sendreq, MPI_STATUSES_IGNORE);
if (NULL != sendreq) {
free (sendreq);
sendreq = NULL;
}
}
return OMPI_SUCCESS;
}
int mca_io_ompio_split_initial_groups(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE *start_offsets_lens,
OMPI_MPI_OFFSET_TYPE *end_offsets,
OMPI_MPI_OFFSET_TYPE bytes_per_group){
int size_new_group = 0;
int size_old_group = 0;
int size_last_group = 0;
int size_smallest_group = 0;
int num_groups = 0;
OMPI_MPI_OFFSET_TYPE max_cci = 0;
OMPI_MPI_OFFSET_TYPE min_cci = 0;
size_new_group = ceil ((float)mca_io_ompio_bytes_per_agg * fh->f_init_procs_per_group/ bytes_per_group);
size_old_group = fh->f_init_procs_per_group;
mca_io_ompio_split_a_group(fh,
start_offsets_lens,
end_offsets,
size_new_group,
&max_cci,
&min_cci,
&num_groups,
&size_smallest_group);
switch(mca_io_ompio_grouping_option){
case DATA_VOLUME:
//Just use size as returned by split group
size_last_group = size_smallest_group;
break;
case UNIFORM_DISTRIBUTION:
if(size_smallest_group <= OMPIO_UNIFORM_DIST_THRESHOLD * size_new_group){
//uneven split need to call split again
if( size_old_group % num_groups == 0 ){
//most even distribution possible
size_new_group = size_old_group / num_groups;
size_last_group = size_new_group;
}
else{
//merge the last small group with the previous group
size_last_group = size_new_group + size_smallest_group;
}
}
else{
//Considered uniform
size_last_group = size_smallest_group;
}
break;
case CONTIGUITY:
while(1){
if((max_cci < OMPIO_CONTG_THRESHOLD) &&
(size_new_group < size_old_group)){
size_new_group = floor( (float) (size_new_group + size_old_group ) / 2 );
mca_io_ompio_split_a_group(fh,
start_offsets_lens,
end_offsets,
size_new_group,
&max_cci,
&min_cci,
&num_groups,
&size_smallest_group);
}
else{
break;
}
}
size_last_group = size_smallest_group;
break;
case OPTIMIZE_GROUPING:
//This case is a combination of Data volume, contiguity and uniform distribution
while(1){
if((max_cci < OMPIO_CONTG_THRESHOLD) &&
(size_new_group < size_old_group)){ //can be a better condition
//monitor the previous iteration
//break if it has not changed.
size_new_group = ceil( (float) (size_new_group + size_old_group ) / 2 );
mca_io_ompio_split_a_group(fh,
start_offsets_lens,
end_offsets,
size_new_group,
&max_cci,
&min_cci,
&num_groups,
&size_smallest_group);
}
else{
break;
}
}
if(size_smallest_group <= OMPIO_UNIFORM_DIST_THRESHOLD * size_new_group){
//uneven split need to call split again
if( size_old_group % num_groups == 0 ){
//most even distribution possible
size_new_group = size_old_group / num_groups;
size_last_group = size_new_group;
}
else{
//merge the last small group with the previous group
size_last_group = size_new_group + size_smallest_group;
}
}
else{
//Considered uniform
size_last_group = size_smallest_group;
}
break;
}
mca_io_ompio_finalize_split(fh,
size_new_group,
size_last_group);
return OMPI_SUCCESS;
}
int mca_io_ompio_retain_initial_groups(mca_io_ompio_file_t *fh){
int i = 0;
fh->f_procs_per_group = fh->f_init_procs_per_group;
fh->f_procs_in_group = (int*)malloc (fh->f_procs_per_group * sizeof(int));
if (NULL == fh->f_procs_in_group) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
for( i = 0 ; i < fh->f_procs_per_group; i++){
fh->f_procs_in_group[i] = fh->f_init_procs_in_group[i];
}
return OMPI_SUCCESS;
}
int mca_io_ompio_merge_groups(mca_io_ompio_file_t *fh,
int *merge_aggrs,
int num_merge_aggrs)
{
int i = 0;
int *sizes_old_group;
int *displs;
sizes_old_group = (int*)malloc(num_merge_aggrs * sizeof(int));
if (NULL == sizes_old_group) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
displs = (int*)malloc(num_merge_aggrs * sizeof(int));
if (NULL == displs) {
opal_output (1, "OUT OF MEMORY\n");
free(sizes_old_group);
return OMPI_ERR_OUT_OF_RESOURCE;
}
//merge_aggrs[0] is considered the new aggregator
//New aggregator collects group sizes of the groups to be merged
ompi_io_ompio_allgather_array (&fh->f_init_procs_per_group,
1,
MPI_INT,
sizes_old_group,
1,
MPI_INT,
0,
merge_aggrs,
num_merge_aggrs,
fh->f_comm);
fh->f_procs_per_group = 0;
for( i = 0; i < num_merge_aggrs; i++){
fh->f_procs_per_group = fh->f_procs_per_group + sizes_old_group[i];
}
displs[0] = 0;
for(i = 1; i < num_merge_aggrs; i++){
displs[i] = displs[i-1] + sizes_old_group[i-1];
}
fh->f_procs_in_group = (int*)malloc (fh->f_procs_per_group * sizeof(int));
if (NULL == fh->f_procs_in_group) {
opal_output (1, "OUT OF MEMORY\n");
free(sizes_old_group);
free(displs);
return OMPI_ERR_OUT_OF_RESOURCE;
}
//New aggregator also collects the grouping distribution
//This is the actual merge
//use allgatherv array
ompi_io_ompio_allgatherv_array (fh->f_init_procs_in_group,
fh->f_init_procs_per_group,
MPI_INT,
fh->f_procs_in_group,
sizes_old_group,
displs,
MPI_INT,
0,
merge_aggrs,
num_merge_aggrs,
fh->f_comm);
free(displs);
free (sizes_old_group);
return OMPI_SUCCESS;
}
int mca_io_ompio_split_a_group(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE *start_offsets_lens,
OMPI_MPI_OFFSET_TYPE *end_offsets,
int size_new_group,
OMPI_MPI_OFFSET_TYPE *max_cci,
OMPI_MPI_OFFSET_TYPE *min_cci,
int *num_groups,
int *size_smallest_group)
{
OMPI_MPI_OFFSET_TYPE *cci = NULL;
*num_groups = fh->f_init_procs_per_group / size_new_group;
*size_smallest_group = size_new_group;
int i = 0;
int k = 0;
int flag = 0; //all groups same size
int size = 0;
if( fh->f_init_procs_per_group % size_new_group != 0 ){
*num_groups = *num_groups + 1;
*size_smallest_group = fh->f_init_procs_per_group % size_new_group;
flag = 1;
}
cci = (OMPI_MPI_OFFSET_TYPE*)malloc(*num_groups * sizeof( OMPI_MPI_OFFSET_TYPE ));
if (NULL == cci) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
//check contiguity within new groups
size = size_new_group;
for( i = 0; i < *num_groups; i++){
cci[i] = start_offsets_lens[3*size_new_group*i + 1];
//if it is the last group check if it is the smallest group
if( (i == *num_groups-1) && flag == 1){
size = *size_smallest_group;
}
for( k = 0; k < size-1; k++){
if( end_offsets[size_new_group* i + k] == start_offsets_lens[3*size_new_group*i + 3*(k+1)] ){
cci[i] += start_offsets_lens[3*size_new_group*i + 3*(k + 1) + 1];
}
}
}
//get min and max cci
*min_cci = cci[0];
*max_cci = cci[0];
for( i = 1 ; i < *num_groups; i++){
if(cci[i] > *max_cci){
*max_cci = cci[i];
}
else if(cci[i] < *min_cci){
*min_cci = cci[i];
}
}
//if cci is not needed anymore
if (NULL != cci) {
free (cci);
cci = NULL;
}
return OMPI_SUCCESS;
}
int mca_io_ompio_finalize_split(mca_io_ompio_file_t *fh,
int size_new_group,
int size_last_group)
{
//based on new group and last group finalize f_procs_per_group and f_procs_in_group
int i = 0;
int j = 0;
int k = 0;
for( i = 0; i < fh->f_init_procs_per_group ; i++){
if( fh->f_rank == fh->f_init_procs_in_group[i]){
if( i >= fh->f_init_procs_per_group - size_last_group ){
fh->f_procs_per_group = size_last_group;
}
else{
fh->f_procs_per_group = size_new_group;
}
}
}
fh->f_procs_in_group = (int*)malloc (fh->f_procs_per_group * sizeof(int));
if (NULL == fh->f_procs_in_group) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
for( i = 0; i < fh->f_init_procs_per_group ; i++){
if( fh->f_rank == fh->f_init_procs_in_group[i]){
if( i >= fh->f_init_procs_per_group - size_last_group ){
//distribution of last group
for( j = 0; j < fh->f_procs_per_group; j++){
fh->f_procs_in_group[j] = fh->f_init_procs_in_group[fh->f_init_procs_per_group - size_last_group + j];
}
}
else{
//distribute all other groups
for( j = 0 ; j < fh->f_init_procs_per_group; j = j + size_new_group){
if(i >= j && i < j+size_new_group ){
for( k = 0; k < fh->f_procs_per_group ; k++){
fh->f_procs_in_group[k] = fh->f_init_procs_in_group[j+k];
}
}
}
}
}
}
return OMPI_SUCCESS;
}
int mca_io_ompio_prepare_to_group(mca_io_ompio_file_t *fh,
OMPI_MPI_OFFSET_TYPE **start_offsets_lens,
OMPI_MPI_OFFSET_TYPE **end_offsets, // need it?
OMPI_MPI_OFFSET_TYPE **aggr_bytes_per_group,
OMPI_MPI_OFFSET_TYPE *bytes_per_group,
int **decision_list,
size_t bytes_per_proc,
int *is_aggregator,
int *ompio_grouping_flag)
{
OMPI_MPI_OFFSET_TYPE start_offset_len[3] = {0};
OMPI_MPI_OFFSET_TYPE *aggr_bytes_per_group_tmp = NULL;
OMPI_MPI_OFFSET_TYPE *start_offsets_lens_tmp = NULL;
OMPI_MPI_OFFSET_TYPE *end_offsets_tmp = NULL;
int *decision_list_tmp = NULL;
int i = 0;
int j = 0;
int k = 0;
int merge_count = 0;
int split_count = 0; //not req?
int retain_as_is_count = 0; //not req?
//Store start offset and length in an array //also add bytes per process
if(NULL == fh->f_decoded_iov){
start_offset_len[0] = 0;
start_offset_len[1] = 0;
}
else{
start_offset_len[0] = (OMPI_MPI_OFFSET_TYPE) fh->f_decoded_iov[0].iov_base;
start_offset_len[1] = fh->f_decoded_iov[0].iov_len;
}
start_offset_len[2] = bytes_per_proc;
start_offsets_lens_tmp = (OMPI_MPI_OFFSET_TYPE* )malloc (3 * fh->f_init_procs_per_group * sizeof(OMPI_MPI_OFFSET_TYPE));
if (NULL == start_offsets_lens_tmp) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
end_offsets_tmp = (OMPI_MPI_OFFSET_TYPE* )malloc (fh->f_init_procs_per_group * sizeof(OMPI_MPI_OFFSET_TYPE));
if (NULL == end_offsets_tmp) {
opal_output (1, "OUT OF MEMORY\n");
free(start_offsets_lens_tmp);
return OMPI_ERR_OUT_OF_RESOURCE;
}
//Gather start offsets across processes in a group on aggregator
ompi_io_ompio_allgather_array (start_offset_len,
3,
OMPI_OFFSET_DATATYPE,
start_offsets_lens_tmp,
3,
OMPI_OFFSET_DATATYPE,
0,
fh->f_init_procs_in_group,
fh->f_init_procs_per_group,
fh->f_comm);
for( k = 0 ; k < fh->f_init_procs_per_group; k++){
end_offsets_tmp[k] = start_offsets_lens_tmp[3*k] + start_offsets_lens_tmp[3*k+1];
}
//Every process has the total bytes written in its group
for(j = 0; j < fh->f_init_procs_per_group; j++){
*bytes_per_group = *bytes_per_group + start_offsets_lens_tmp[3*j+2];
}
*start_offsets_lens = &start_offsets_lens_tmp[0];
*end_offsets = &end_offsets_tmp[0];
for( j = 0 ; j < fh->f_init_num_aggrs ; j++){
if(fh->f_rank == fh->f_init_aggr_list[j])
*is_aggregator = 1;
}
//Decide groups going in for a merge or a split
//Merge only if the groups are consecutive
if(*is_aggregator == 1){
aggr_bytes_per_group_tmp = (OMPI_MPI_OFFSET_TYPE*)malloc (fh->f_init_num_aggrs * sizeof(OMPI_MPI_OFFSET_TYPE));
if (NULL == aggr_bytes_per_group_tmp) {
opal_output (1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
decision_list_tmp = (int* )malloc (fh->f_init_num_aggrs * sizeof(int));
if (NULL == decision_list_tmp) {
opal_output (1, "OUT OF MEMORY\n");
free(start_offsets_lens_tmp);
free(end_offsets_tmp);
return OMPI_ERR_OUT_OF_RESOURCE;
}
//Communicate bytes per group between all aggregators
ompi_io_ompio_allgather_array (bytes_per_group,
1,
OMPI_OFFSET_DATATYPE,
aggr_bytes_per_group_tmp,
1,
OMPI_OFFSET_DATATYPE,
0,
fh->f_init_aggr_list,
fh->f_init_num_aggrs,
fh->f_comm);
for( i = 0; i < fh->f_init_num_aggrs; i++){
if((size_t)(aggr_bytes_per_group_tmp[i])>
(size_t)mca_io_ompio_bytes_per_agg){
decision_list_tmp[i] = OMPIO_SPLIT;
split_count++;
}
else if((size_t)(aggr_bytes_per_group_tmp[i])<
(size_t)mca_io_ompio_bytes_per_agg){
decision_list_tmp[i] = OMPIO_MERGE;
merge_count++;
}
else{
decision_list_tmp[i] = OMPIO_RETAIN;
retain_as_is_count++;
}
}
*aggr_bytes_per_group = &aggr_bytes_per_group_tmp[0];
//Go through the decision list to see if non consecutive
//processes intend to merge, if yes retain original grouping
for( i = 0; i < fh->f_init_num_aggrs ; i++){
if(decision_list_tmp[i] == OMPIO_MERGE){
if( (i == 0) &&
(decision_list_tmp[i+1] != OMPIO_MERGE)){ //first group
decision_list_tmp[i] = OMPIO_RETAIN;
}
else if( (i == fh->f_init_num_aggrs-1) &&
(decision_list_tmp[i-1] != OMPIO_MERGE)){
decision_list_tmp[i] = OMPIO_RETAIN;
}
else if(!((decision_list_tmp[i-1] == OMPIO_MERGE) ||
(decision_list_tmp[i+1] == OMPIO_MERGE))){
decision_list_tmp[i] = OMPIO_RETAIN;
}
}
}
//Set the flag as per the decision list
for( i = 0 ; i < fh->f_init_num_aggrs; i++){
if((decision_list_tmp[i] == OMPIO_MERGE)&&
(fh->f_rank == fh->f_init_aggr_list[i]))
*ompio_grouping_flag = OMPIO_MERGE;
if((decision_list_tmp[i] == OMPIO_SPLIT)&&
(fh->f_rank == fh->f_init_aggr_list[i]))
*ompio_grouping_flag = OMPIO_SPLIT;
if((decision_list_tmp[i] == OMPIO_RETAIN)&&
(fh->f_rank == fh->f_init_aggr_list[i]))
*ompio_grouping_flag = OMPIO_RETAIN;
}
//print decision list of aggregators
/*printf("RANK%d : Printing decsion list : \n",fh->f_rank);
for( i = 0; i < fh->f_init_num_aggrs; i++){
if(decision_list_tmp[i] == OMPIO_MERGE)
printf("MERGE,");
else if(decision_list_tmp[i] == OMPIO_SPLIT)
printf("SPLIT, ");
else if(decision_list_tmp[i] == OMPIO_RETAIN)
printf("RETAIN, " );
}
printf("\n\n");
*/
*decision_list = &decision_list_tmp[0];
}
//Communicate flag to all group members
ompi_io_ompio_bcast_array (ompio_grouping_flag,
1,
MPI_INT,
0,
fh->f_init_procs_in_group,
fh->f_init_procs_per_group,
fh->f_comm);
return OMPI_SUCCESS;
}
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