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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) 2004-2006 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) 2008-2015 University of Houston. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
* These symbols are in a file by themselves to provide nice linker
* semantics. Since linkers generally pull in symbols by object fules,
* keeping these symbols as the only symbols in this file prevents
* utility programs such as "ompi_info" from having to import entire
* modules just to query their version and parameters
*/
#include "ompi_config.h"
#include "mpi.h"
#include <unistd.h>
#include <sys/uio.h>
#if HAVE_AIO_H
#include <aio.h>
#endif
int fbtl_posix_max_aio_active_reqs=2048;
#include "ompi/mca/fbtl/fbtl.h"
#include "ompi/mca/fbtl/posix/fbtl_posix.h"
/*
* *******************************************************************
* ************************ actions structure ************************
* *******************************************************************
*/
static mca_fbtl_base_module_1_0_0_t posix = {
mca_fbtl_posix_module_init, /* initalise after being selected */
mca_fbtl_posix_module_finalize, /* close a module on a communicator */
mca_fbtl_posix_preadv, /* blocking read */
#if defined (FBTL_POSIX_HAVE_AIO)
mca_fbtl_posix_ipreadv, /* non-blocking read*/
#else
NULL, /* non-blocking read */
#endif
mca_fbtl_posix_pwritev, /* blocking write */
#if defined (FBTL_POSIX_HAVE_AIO)
mca_fbtl_posix_ipwritev, /* non-blocking write */
mca_fbtl_posix_progress, /* module specific progress */
mca_fbtl_posix_request_free /* free module specific data items on the request */
#else
NULL, /* non-blocking write */
NULL, /* module specific progress */
NULL /* free module specific data items on the request */
#endif
};
/*
* *******************************************************************
* ************************* structure ends **************************
* *******************************************************************
*/
int mca_fbtl_posix_component_init_query(bool enable_progress_threads,
bool enable_mpi_threads) {
/* Nothing to do */
return OMPI_SUCCESS;
}
struct mca_fbtl_base_module_1_0_0_t *
mca_fbtl_posix_component_file_query (mca_io_ompio_file_t *fh, int *priority) {
*priority = mca_fbtl_posix_priority;
if (UFS == fh->f_fstype) {
if (*priority < 50) {
*priority = 50;
}
}
return &posix;
}
int mca_fbtl_posix_component_file_unquery (mca_io_ompio_file_t *file) {
/* This function might be needed for some purposes later. for now it
* does not have anything to do since there are no steps which need
* to be undone if this module is not selected */
return OMPI_SUCCESS;
}
int mca_fbtl_posix_module_init (mca_io_ompio_file_t *file) {
#if defined (FBTL_POSIX_HAVE_AIO)
long val = sysconf(_SC_AIO_MAX);
if ( -1 != val ) {
fbtl_posix_max_aio_active_reqs = (int)val;
}
#endif
return OMPI_SUCCESS;
}
int mca_fbtl_posix_module_finalize (mca_io_ompio_file_t *file) {
return OMPI_SUCCESS;
}
bool mca_fbtl_posix_progress ( mca_ompio_request_t *req)
{
bool ret=false;
#if defined (FBTL_POSIX_HAVE_AIO)
int i=0, lcount=0, ret_code;
mca_fbtl_posix_request_data_t *data=(mca_fbtl_posix_request_data_t *)req->req_data;
off_t start_offset, end_offset, total_length;
for (i=data->aio_first_active_req; i < data->aio_last_active_req; i++ ) {
if ( EINPROGRESS == data->aio_req_status[i] ) {
data->aio_req_status[i] = aio_error ( &data->aio_reqs[i]);
if ( 0 == data->aio_req_status[i]){
data->aio_open_reqs--;
lcount++;
/* assuming right now that aio_return will return
** the number of bytes written/read and not an error code,
** since aio_error should have returned an error in that
** case and not 0 ( which means request is complete)
*/
data->aio_total_len += aio_return (&data->aio_reqs[i]);
}
else if ( EINPROGRESS == data->aio_req_status[i]){
/* not yet done */
continue;
}
else {
/* an error occured. Mark the request done, but
set an error code in the status */
req->req_ompi.req_status.MPI_ERROR = OMPI_ERROR;
req->req_ompi.req_status._ucount = data->aio_total_len;
ret = true;
break;
}
}
else {
lcount++;
}
}
#if 0
printf("lcount=%d open_reqs=%d\n", lcount, data->aio_open_reqs );
#endif
if ( (lcount == data->aio_req_chunks) && (0 != data->aio_open_reqs )) {
/* release the lock of the previous operations */
mca_fbtl_posix_unlock ( &data->aio_lock, data->aio_fh );
/* post the next batch of operations */
data->aio_first_active_req = data->aio_last_active_req;
if ( (data->aio_req_count-data->aio_last_active_req) > data->aio_req_chunks ) {
data->aio_last_active_req += data->aio_req_chunks;
}
else {
data->aio_last_active_req = data->aio_req_count;
}
start_offset = data->aio_reqs[data->aio_first_active_req].aio_offset;
end_offset = data->aio_reqs[data->aio_last_active_req-1].aio_offset + data->aio_reqs[data->aio_last_active_req-1].aio_nbytes;
total_length = (end_offset - start_offset);
if ( FBTL_POSIX_READ == data->aio_req_type ) {
ret_code = mca_fbtl_posix_lock( &data->aio_lock, data->aio_fh, F_RDLCK, start_offset, total_length, OMPIO_LOCK_ENTIRE_REGION );
}
else if ( FBTL_POSIX_WRITE == data->aio_req_type ) {
ret_code = mca_fbtl_posix_lock( &data->aio_lock, data->aio_fh, F_WRLCK, start_offset, total_length, OMPIO_LOCK_ENTIRE_REGION );
}
if ( 0 < ret_code ) {
opal_output(1, "mca_fbtl_posix_progress: error in mca_fbtl_posix_lock() %d", ret_code);
/* Just in case some part of the lock actually succeeded. */
mca_fbtl_posix_unlock ( &data->aio_lock, data->aio_fh );
return OMPI_ERROR;
}
for ( i=data->aio_first_active_req; i< data->aio_last_active_req; i++ ) {
if ( FBTL_POSIX_READ == data->aio_req_type ) {
if (-1 == aio_read(&data->aio_reqs[i])) {
opal_output(1, "mca_fbtl_posix_progress: error in aio_read()");
mca_fbtl_posix_unlock ( &data->aio_lock, data->aio_fh );
return OMPI_ERROR;
}
}
else if ( FBTL_POSIX_WRITE == data->aio_req_type ) {
if (-1 == aio_write(&data->aio_reqs[i])) {
opal_output(1, "mca_fbtl_posix_progress: error in aio_write()");
mca_fbtl_posix_unlock ( &data->aio_lock, data->aio_fh );
return OMPI_ERROR;
}
}
}
#if 0
printf("posting new batch: first=%d last=%d\n", data->aio_first_active_req, data->aio_last_active_req );
#endif
}
if ( 0 == data->aio_open_reqs ) {
/* all pending operations are finished for this request */
req->req_ompi.req_status.MPI_ERROR = OMPI_SUCCESS;
req->req_ompi.req_status._ucount = data->aio_total_len;
mca_fbtl_posix_unlock ( &data->aio_lock, data->aio_fh );
ret = true;
}
#endif
return ret;
}
void mca_fbtl_posix_request_free ( mca_ompio_request_t *req)
{
#if defined (FBTL_POSIX_HAVE_AIO)
/* Free the fbtl specific data structures */
mca_fbtl_posix_request_data_t *data=(mca_fbtl_posix_request_data_t *)req->req_data;
if (NULL != data ) {
mca_fbtl_posix_unlock ( &data->aio_lock, data->aio_fh );
if ( NULL != data->aio_reqs ) {
free ( data->aio_reqs);
}
if ( NULL != data->aio_req_status ) {
free ( data->aio_req_status );
}
free ( data );
req->req_data = NULL;
}
#endif
return;
}
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