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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2017 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) 2013-2018 University of Houston. All rights reserved.
* Copyright (c) 2015-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "sharedfp_individual.h"
#include "mpi.h"
#include "ompi/constants.h"
#include "ompi/mca/sharedfp/sharedfp.h"
#include "ompi/mca/sharedfp/base/base.h"
int mca_sharedfp_individual_write (ompio_file_t *fh,
const void *buf,
int count,
struct ompi_datatype_t *datatype,
ompi_status_public_t *status)
{
int ret = OMPI_SUCCESS;
size_t numofbytes = 0;
size_t totalbytes = 0;
mca_sharedfp_individual_header_record *headnode = NULL;
struct mca_sharedfp_base_data_t *sh = NULL;
if ( NULL == fh->f_sharedfp_data ) {
opal_output(ompi_sharedfp_base_framework.framework_output,
"sharedfp_individual_write: module not initialized \n");
return OMPI_ERROR;
}
mca_sharedfp_individual_usage_counter++;
/* Calculate the number of bytes of data that need to be written*/
opal_datatype_type_size ( &datatype->super, &numofbytes);
totalbytes = count * numofbytes;
/*Retrieve data structure for shared file pointer operations*/
sh = fh->f_sharedfp_data;
headnode = (mca_sharedfp_individual_header_record*)sh->selected_module_data;
if ( NULL == headnode) {
opal_output (0, "sharedfp_individual_write_ordered: headnode is NULL but file is open\n");
return OMPI_ERROR;
}
/*Insert metadata record into a queue*/
mca_sharedfp_individual_insert_metadata(OMPI_FILE_WRITE_SHARED, totalbytes, sh);
/*Write the data into individual file*/
ret = mca_common_ompio_file_write_at ( headnode->datafilehandle,
headnode->datafile_offset,
buf, count, datatype, status);
if ( OMPI_SUCCESS != ret ) {
opal_output(0,"mca_sharedfp_individual_write: Error while writing the datafile \n");
return -1;
}
/* Update the datafileoffset*/
headnode->datafile_offset = headnode->datafile_offset + totalbytes;
return ret;
}
int mca_sharedfp_individual_write_ordered (ompio_file_t *fh,
const void *buf,
int count,
struct ompi_datatype_t *datatype,
ompi_status_public_t *status)
{
int ret = OMPI_SUCCESS;
int i = 0;
size_t numofbytes = 0;
size_t totalbytes = 0;
OMPI_MPI_OFFSET_TYPE *offbuff=NULL;
OMPI_MPI_OFFSET_TYPE global_offset = 0;
OMPI_MPI_OFFSET_TYPE prev_offset = 0;
OMPI_MPI_OFFSET_TYPE temp = 0, offset = 0;
mca_sharedfp_individual_header_record *headnode = NULL;
struct mca_sharedfp_base_data_t *sh = NULL;
if(fh->f_sharedfp_data==NULL){
opal_output(ompi_sharedfp_base_framework.framework_output,
"sharedfp_individual_write_ordered: module not initialized \n");
return OMPI_ERROR;
}
mca_sharedfp_individual_usage_counter++;
/*Retrieve the sharedfp data structures*/
sh = fh->f_sharedfp_data;
/* Calculate the number of bytes of data that needs to be written*/
opal_datatype_type_size ( &datatype->super, &numofbytes);
totalbytes = count * numofbytes;
headnode = (mca_sharedfp_individual_header_record*)sh->selected_module_data;
if ( NULL == headnode) {
opal_output (0, "sharedfp_individual_write_ordered: headnode is NULL but file is open\n");
return OMPI_ERROR;
}
/* Data from all the metadata is combined and written to the main file */
ret = mca_sharedfp_individual_collaborate_data ( sh, fh );
if ( OMPI_SUCCESS != ret) {
return ret;
}
if ( 0 == fh->f_rank ) {
offbuff = (OMPI_MPI_OFFSET_TYPE *)malloc ( sizeof(OMPI_MPI_OFFSET_TYPE) * fh->f_size);
if (NULL == offbuff ) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
/*collect the total bytes to be written*/
ret = fh->f_comm->c_coll->coll_gather ( &totalbytes,
1,
OMPI_OFFSET_DATATYPE,
offbuff,
1,
OMPI_OFFSET_DATATYPE,
0,
fh->f_comm,
fh->f_comm->c_coll->coll_gather_module );
if ( OMPI_SUCCESS != ret ) {
opal_output(0,"sharedfp_individual_write_ordered: Error in gathering offsets \n");
goto exit;
}
if ( 0 == fh->f_rank ) {
prev_offset = offbuff[0];
offbuff[0] = sh->global_offset;
for (i = 1; i < fh->f_size ; i++){
temp = offbuff[i];
offbuff[i] = offbuff[i - 1] + prev_offset;
prev_offset = temp;
}
for (i = 0; i < fh->f_size; i++){
global_offset = offbuff[fh->f_size - 1] + prev_offset;
}
}
/* Scatter the results to the other processes */
ret = fh->f_comm->c_coll->coll_scatter ( offbuff,
1,
OMPI_OFFSET_DATATYPE,
&offset,
1,
OMPI_OFFSET_DATATYPE,
0,
fh->f_comm,
fh->f_comm->c_coll->coll_scatter_module );
if ( OMPI_SUCCESS != ret ) {
opal_output(0,"sharedfp_individual_write_ordered: Error in scattering offsets \n");
goto exit;
}
ret = fh->f_comm->c_coll->coll_bcast ( &global_offset,
1,
OMPI_OFFSET_DATATYPE,
0,
fh->f_comm,
fh->f_comm->c_coll->coll_bcast_module );
if ( OMPI_SUCCESS != ret ) {
opal_output(0,"sharedfp_individual_write_ordered: Error while bcasting global offset \n");
goto exit;
}
sh->global_offset = global_offset;
/*use file_write_at_all to ensure the order*/
ret = mca_common_ompio_file_write_at_all(fh, offset, buf,count,datatype,status);
if ( OMPI_SUCCESS != ret ) {
opal_output(0,"sharedfp_individual_write_ordered: Error while writing the datafile \n");
}
exit:
if ( NULL != offbuff ) {
free ( offbuff);
}
return ret;
}
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