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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "adio.h"
#include "adio_extern.h"
#include "ad_pvfs2.h"
#include "ad_pvfs2_io.h"
#include "ad_pvfs2_common.h"
void ADIOI_PVFS2_ReadContig(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status * status, int *error_code)
{
int ret;
MPI_Count datatype_size, len;
PVFS_Request file_req, mem_req;
PVFS_sysresp_io resp_io;
ADIOI_PVFS2_fs *pvfs_fs;
static char myname[] = "ADIOI_PVFS2_READCONTIG";
if (count == 0) {
#ifdef HAVE_STATUS_SET_BYTES
if (status)
MPIR_Status_set_bytes(status, datatype, 0);
#endif
*error_code = MPI_SUCCESS;
return;
}
pvfs_fs = (ADIOI_PVFS2_fs *) fd->fs_ptr;
MPI_Type_size_x(datatype, &datatype_size);
len = datatype_size * count;
ret = PVFS_Request_contiguous(len, PVFS_BYTE, &mem_req);
/* --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_request_contig (memory)", 0);
return;
}
/* --END ERROR HANDLING-- */
ret = PVFS_Request_contiguous(len, PVFS_BYTE, &file_req);
/* --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_request_contig (file)", 0);
return;
}
/* --END ERROR HANDLING-- */
if (file_ptr_type == ADIO_INDIVIDUAL) {
/* copy individual file pointer into offset variable, continue */
offset = fd->fp_ind;
}
#ifdef ADIOI_MPE_LOGGING
MPE_Log_event(ADIOI_MPE_read_a, 0, NULL);
#endif
ret = PVFS_sys_read(pvfs_fs->object_ref, file_req, offset, buf,
mem_req, &(pvfs_fs->credentials), &resp_io);
#ifdef ADIOI_MPE_LOGGING
MPE_Log_event(ADIOI_MPE_read_b, 0, NULL);
#endif
/* --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_read", 0);
goto fn_exit;
}
/* --END ERROR HANDLING-- */
if (file_ptr_type == ADIO_INDIVIDUAL) {
fd->fp_ind += (int) resp_io.total_completed;
/* TODO: WHY THE INT CAST? */
}
fd->fp_sys_posn = offset + (int) resp_io.total_completed;
#ifdef HAVE_STATUS_SET_BYTES
if (status)
MPIR_Status_set_bytes(status, datatype, resp_io.total_completed);
#endif
*error_code = MPI_SUCCESS;
fn_exit:
PVFS_Request_free(&mem_req);
PVFS_Request_free(&file_req);
return;
}
static int ADIOI_PVFS2_ReadStridedListIO(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status * status, int *error_code)
{
return ADIOI_PVFS2_StridedListIO(fd, buf, count,
datatype, file_ptr_type, offset, status, error_code, READ);
}
static int ADIOI_PVFS2_ReadStridedDtypeIO(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status * status, int *error_code)
{
return ADIOI_PVFS2_StridedDtypeIO(fd, buf, count,
datatype, file_ptr_type, offset, status, error_code, READ);
}
void ADIOI_PVFS2_ReadStrided(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status * status, int
*error_code)
{
/* four ways (to date) that we can carry out strided i/o accesses:
* - naive posix
* - 'true' Datatype (from avery)
* - new List I/O (from avery)
* - classic List I/O (the one that's always been in ROMIO)
* I imagine we'll keep Datatype as an optional optimization, and afer a
* release or two promote it to the default
*/
int ret = -1;
if (fd->hints->fs_hints.pvfs2.posix_read == ADIOI_HINT_ENABLE) {
ADIOI_GEN_ReadStrided(fd, buf, count, datatype, file_ptr_type, offset, status, error_code);
return;
}
if (fd->hints->fs_hints.pvfs2.dtype_read == ADIOI_HINT_ENABLE) {
ret = ADIOI_PVFS2_ReadStridedDtypeIO(fd, buf, count,
datatype, file_ptr_type, offset, status, error_code);
/* Fall back to list I/O if datatype I/O didn't work */
if (ret != 0) {
fprintf(stderr, "Falling back to list I/O since datatype I/O failed\n");
ret = ADIOI_PVFS2_ReadStridedListIO(fd, buf, count,
datatype, file_ptr_type,
offset, status, error_code);
}
return;
}
if (fd->hints->fs_hints.pvfs2.listio_read == ADIOI_HINT_ENABLE) {
ret = ADIOI_PVFS2_ReadStridedListIO(fd, buf, count, datatype,
file_ptr_type, offset, status, error_code);
return;
}
/* Use classic list I/O if no hints given base case */
ADIOI_PVFS2_OldReadStrided(fd, buf, count, datatype, file_ptr_type, offset, status, error_code);
return;
}
/*
*/
|
