1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/* -*- 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_pvfs2.h"
#include "ad_pvfs2_common.h"
/* we want to be a bit clever here: at scale, if every client sends a
* flush request, it will stress the PVFS2 servers with redundant
* PVFS_sys_flush requests. Instead, one process should wait for
* everyone to catch up, do the sync, then broadcast the result. We can
* get away with this thanks to PVFS2's stateless design
*/
void ADIOI_PVFS2_Flush(ADIO_File fd, int *error_code)
{
int ret, rank, dummy=0, dummy_in=0;
ADIOI_PVFS2_fs *pvfs_fs;
static char myname[] = "ADIOI_PVFS2_FLUSH";
*error_code = MPI_SUCCESS;
pvfs_fs = (ADIOI_PVFS2_fs*)fd->fs_ptr;
MPI_Comm_rank(fd->comm, &rank);
/* unlike ADIOI_PVFS2_Resize, MPI_File_sync() does not perform any
* syncronization */
MPI_Reduce(&dummy_in, &dummy, 1, MPI_INT, MPI_SUM,
fd->hints->ranklist[0], fd->comm);
/* io_worker computed in ADIO_Open */
if (rank == fd->hints->ranklist[0]) {
ret = PVFS_sys_flush(pvfs_fs->object_ref, &(pvfs_fs->credentials));
}
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_PVFS2_error_convert(ret),
"Error in PVFS_sys_flush", 0);
}
/* --END ERROR HANDLING-- */
}
/*
* vim: ts=8 sts=4 sw=4 noexpandtab
*/
|
