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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "ad_zoidfs.h"
#include "ad_zoidfs_common.h"
/* we want to be a bit clever here: at scale, if every client sends a
* flush request, it will stress the file system with redundant
* commit requests. Instead, one process should wait for
* everyone to catch up, do the sync, then broadcast the result.
*/
void ADIOI_ZOIDFS_Flush(ADIO_File fd, int *error_code)
{
int ret, rank, dummy=0, dummy_in=0;
ADIOI_ZOIDFS_object *zoidfs_obj_ptr;
static char myname[] = "ADIOI_ZOIDFS_FLUSH";
*error_code = MPI_SUCCESS;
zoidfs_obj_ptr = (ADIOI_ZOIDFS_object*)fd->fs_ptr;
MPI_Comm_rank(fd->comm, &rank);
/* collective call to ensure no outstanding write requests. reduce is
* slightly less expensvie than barrier */
MPI_Reduce(&dummy_in, &dummy, 1, MPI_INT, MPI_SUM,
fd->hints->ranklist[0], fd->comm);
if (rank == fd->hints->ranklist[0]) {
ret = zoidfs_commit(zoidfs_obj_ptr, ZOIDFS_NO_OP_HINT);
}
MPI_Bcast(&ret, 1, MPI_INT, fd->hints->ranklist[0], fd->comm);
/* --BEGIN ERROR HANDLING-- */
if (ret != 0) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
ADIOI_ZOIDFS_error_convert(ret),
"Error in zoidfs_commit", 0);
}
/* --END ERROR HANDLING-- */
}
/*
* vim: ts=8 sts=4 sw=4 noexpandtab
*/
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