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
|
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "adio.h"
#include <unistd.h>
#ifdef AGGREGATION_PROFILE
#include "mpe.h"
#endif
#ifdef ROMIO_GPFS
# include "adio/ad_gpfs/ad_gpfs_tuning.h"
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
void ADIOI_GEN_ReadContig(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status *status,
int *error_code)
{
ssize_t err = -1;
MPI_Count datatype_size;
ADIO_Offset len, bytes_xfered=0;
size_t rd_count;
static char myname[] = "ADIOI_GEN_READCONTIG";
#ifdef ROMIO_GPFS
double io_time=0;
#endif
char *p;
#ifdef AGGREGATION_PROFILE
MPE_Log_event (5034, 0, NULL);
#endif
MPI_Type_size_x(datatype, &datatype_size);
len = datatype_size * (ADIO_Offset)count;
#ifdef ROMIO_GPFS
io_time = MPI_Wtime();
if (gpfsmpio_timing) {
gpfsmpio_prof_cr[ GPFSMPIO_CIO_DATA_SIZE ] += len;
}
#endif
if (file_ptr_type == ADIO_INDIVIDUAL) {
offset = fd->fp_ind;
}
p=buf;
while (bytes_xfered < len) {
#ifdef ADIOI_MPE_LOGGING
MPE_Log_event( ADIOI_MPE_read_a, 0, NULL );
#endif
rd_count = len - bytes_xfered;
/* stupid FreeBSD and Darwin do not like a count larger than a signed
int, even though size_t is eight bytes... */
if (rd_count > INT_MAX)
rd_count = INT_MAX;
#ifdef ROMIO_GPFS
if (gpfsmpio_devnullio)
err = pread(fd->null_fd, p, rd_count, offset+bytes_xfered);
else
#endif
err = pread(fd->fd_sys, p, rd_count, offset+bytes_xfered);
/* --BEGIN ERROR HANDLING-- */
if (err == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
MPI_ERR_IO, "**io",
"**io %s", strerror(errno));
fd->fp_sys_posn = -1;
return;
}
/* --END ERROR HANDLING-- */
if (err == 0) {
/* end of file */
break;
}
#ifdef ADIOI_MPE_LOGGING
MPE_Log_event( ADIOI_MPE_read_b, 0, NULL );
#endif
bytes_xfered += err;
p += err;
}
#ifdef ROMIO_GPFS
if (gpfsmpio_timing) gpfsmpio_prof_cr[ GPFSMPIO_CIO_T_POSI_RW ] += (MPI_Wtime() - io_time);
#endif
fd->fp_sys_posn = offset + bytes_xfered;
if (file_ptr_type == ADIO_INDIVIDUAL) {
fd->fp_ind += bytes_xfered;
}
#ifdef HAVE_STATUS_SET_BYTES
/* what if we only read half a datatype? */
/* bytes_xfered could be larger than int */
if (err != -1) MPIR_Status_set_bytes(status, datatype, bytes_xfered);
#endif
*error_code = MPI_SUCCESS;
#ifdef AGGREGATION_PROFILE
MPE_Log_event (5035, 0, NULL);
#endif
#ifdef ROMIO_GPFS
if (gpfsmpio_timing) gpfsmpio_prof_cr[ GPFSMPIO_CIO_T_MPIO_RW ] += (MPI_Wtime() - io_time);
#endif
}
|
