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#include "definitions.h"
#include "ArrayGroup.h"
#include "MPIFS.h"
#include "Chunk.h"
#include "App_Info.h"
#include "Array.h"
#include "message.h"
#include "Shared_IO.h"
extern MPIFS* MPIFS_global_obj;
extern int SUBCHUNK_SIZE;
Shared_IO::Shared_IO(int *schema_string, int schema_size, int world_rank,
int comp_app_num,int comp_app_size , App_Info *app_info)
: Simple_IO(schema_string, schema_size, world_rank, comp_app_num,
comp_app_size, app_info)
{
compute_chunk_ = new Chunk();
current_chunk_ = new Chunk();
subchunk_ = new Chunk();
current_array_id_ = -1;
if ((op_type_ == RESTART)||(op_type_ == GENERAL_READ)||
(op_type_ == READ_TIMESTEP))
read_op_ = YES;
else
read_op_ = NO;
/* We need to set the following variables so that continue_io()*
* would start the I/O of the first subchunk automatically */
contiguous_ = NO;
current_array_id_ = -1;
current_chunk_id_ = 0;
num_of_chunks_ = -1; /* This will cause get_next_chunk() to fail */
current_subchunk_id_ = 0;
num_of_subchunks_ = -1; /* Causes get_next_subchunk() to fail */
status_flag_ = START;
continue_io();
}
Shared_IO::~Shared_IO()
{
if (subchunk_) delete subchunk_;
if (compute_chunk_) delete compute_chunk_;
subchunk_ = compute_chunk_ = NULL;
}
Boolean Shared_IO::get_next_array(){
current_array_id_++;
if (current_array_id_ < num_of_arrays_){
make_subchunks_ = -1;
current_array_ = find_array(current_array_id_);
nat_chunked_ = current_array_->nat_chunked();
sub_chunked_ = current_array_->sub_chunked();
array_rank_ = current_array_->rank();
if (array_rank_ > max_rank_){
realloc_schema_bufs(array_rank_);
}
num_of_chunks_ = current_array_->layout(IO_NODE)->total_elements();
current_chunk_id_ = -1;
if (nat_chunked_ && !sub_chunked_)
contiguous_ = YES; /* No need to use derived datatypes */
else
contiguous_ = NO; /* Have to use derived datatypes */
bytes_to_go_ = 0;
current_subchunk_id_ = -1;
return YES;
} else
return NO;
}
Boolean Shared_IO::get_next_chunk()
{
int *ptr;
if (!current_array_) return NO;
current_chunk_id_ = current_array_->get_next_index(current_chunk_id_,
my_io_rank_,
num_io_nodes_);
if (current_chunk_id_ < num_of_chunks_){
current_chunk_->set_data_ptr(NULL);
current_chunk_->init(current_array_, current_chunk_id_,
IO_NODE, NO_ALLOC);
if (contiguous_){
bytes_to_go_ = current_chunk_->total_size_in_bytes();
current_chunk_->set_data_ptr(mem_buf_);
ptr = schema_bufs_[0];
*ptr++ = current_array_id_;
*ptr++ = current_chunk_id_;
*ptr++ = (int) nat_chunked_;
*ptr++ = (int) contiguous_;
*ptr++ = op_type_;
*ptr++ = 0;
*ptr++ = 0;
compute_chunk_overlaps(current_array_, current_chunk_);
}
else {
if (!sub_chunked_ && (make_subchunks_ == -1)){
current_array_->make_sub_chunks(current_chunk_);
make_subchunks_ = 1;
}
num_of_subchunks_ = current_array_->layout(SUB_CHUNK)->total_elements();
current_subchunk_id_ = -1;
}
return YES;
}
else
return NO;
}
/* This should not be called for the contiguous_ case */
Boolean Shared_IO::get_next_subchunk()
{
current_subchunk_id_++;
if (current_subchunk_id_ < num_of_subchunks_){
subchunk_->set_data_ptr(NULL);
subchunk_->init(current_chunk_, current_subchunk_id_, NO_ALLOC);
bytes_to_go_ = subchunk_->total_size_in_bytes();
if (bytes_to_go_ < mem_buf_size_)
realloc_mem_bufs(bytes_to_go_);
subchunk_->set_data_ptr(mem_buf_);
return YES;
}
else
return NO;
}
void Shared_IO::start_subchunk_io()
{
int *ptr;
if (contiguous_){
ptr = schema_bufs_[0];
ptr[6] = min(SUBCHUNK_SIZE, bytes_to_go_);
nb_send_message((void *)ptr, 7, MPI_INT, dest_ids_[0],
CHUNK_SCHEMA, MPI_COMM_WORLD, &schema_requests_[0]);
if (read_op_){
read_data(mem_buf_, ptr[6]);
nb_send_message((void *)mem_buf_, ptr[6], MPI_CHAR, dest_ids_[0],
CHUNK_DATA_FROM_IO, MPI_COMM_WORLD, &requests_[0]);
}
else
nb_receive_message((void *)mem_buf_, ptr[6], MPI_CHAR, dest_ids_[0],
CHUNK_DATA_TO_IO, MPI_COMM_WORLD, &requests_[0]);
ptr[5] += ptr[6]; /* Offset of the next subchunk */
bytes_to_go_ -= ptr[6];
status_flag_ = WAITING;
} else {
compute_chunk_overlaps(current_array_, subchunk_);
compute_schemas(current_array_, subchunk_, compute_chunk_,
current_array_id_);
if (read_op_){
read_data(subchunk_);
send_data_to_compute_nodes(subchunk_, NULL, NULL);
}
else
receive_data_from_compute_nodes(subchunk_, NULL, NULL);
status_flag_ = WAITING;
}
}
Boolean Shared_IO::test_subchunk_io()
{
int flag;
MPI_Testall(num_overlaps_, requests_, &flag, statuses_);
if (flag) {
/* Free schema request objects - Do we need to do this */
MPI_Waitall(num_overlaps_, schema_requests_,statuses_);
status_flag_ = START;
if (!read_op_)
if (contiguous_)
write_data(mem_buf_, schema_bufs_[0][6], 1);
else
write_data(subchunk_);
if (!contiguous_) free_datatypes();
return YES;
}
return NO;
}
/* Return YES, if I/O is complete */
Boolean Shared_IO::continue_io()
{
if (status_flag_ == START){
if (!start_next_subchunk_io()) return YES; /* IO completed */
} else if (status_flag_ == WAITING){
if (test_subchunk_io())
if (!start_next_subchunk_io()) return YES; /* IO done */
} else {
printf("Error - Invalid status_flag value \n");
exit(11);
}
return NO;
}
/* Return yes if you can start the io of another subchunk */
Boolean Shared_IO::start_next_subchunk_io()
{
if (contiguous_){
if (bytes_to_go_ <= 0){
while(!get_next_chunk()){
if (!get_next_array()) return NO;
}
/* Since we might be looking at another array */
if (!contiguous_) get_next_subchunk();
}
start_subchunk_io();
} else {
if (!get_next_subchunk()){
/* We have finished this chunk */
while(!get_next_chunk()){
if (!get_next_array()) return NO;
}
if (!contiguous_) get_next_subchunk();
}
start_subchunk_io();
}
return YES;
}
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