darshan-posix.c 38.4 KB
Newer Older
1
/*
Shane Snyder's avatar
Shane Snyder committed
2 3 4
 * Copyright (C) 2015 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
5 6
 */

7
#include "darshan-runtime-config.h"
8 9 10 11 12 13 14 15 16 17 18 19 20 21
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/uio.h>
#include <sys/mman.h>
#include <search.h>
#include <assert.h>
22
#include <libgen.h>
23
#include <aio.h>
24
#define __USE_GNU
25
#include <pthread.h>
26

27
#include "uthash.h"
28
#include "darshan.h"
29
#include "darshan-posix-log-format.h"
30

31
#ifndef HAVE_OFF64_T
32 33
typedef int64_t off64_t;
#endif
34 35 36
#ifndef HAVE_AIOCB64
#define aiocb64 aiocb
#endif
37

38 39
/* TODO: more libc, fgetc, etc etc etc. */

40 41
DARSHAN_FORWARD_DECL(open, int, (const char *path, int flags, ...));
DARSHAN_FORWARD_DECL(open64, int, (const char *path, int flags, ...));
42 43
DARSHAN_FORWARD_DECL(creat, int, (const char* path, mode_t mode));
DARSHAN_FORWARD_DECL(creat64, int, (const char* path, mode_t mode));
44 45
DARSHAN_FORWARD_DECL(fopen, FILE*, (const char *path, const char *mode));
DARSHAN_FORWARD_DECL(fopen64, FILE*, (const char *path, const char *mode));
46 47 48 49 50 51 52 53
DARSHAN_FORWARD_DECL(read, ssize_t, (int fd, void *buf, size_t count));
DARSHAN_FORWARD_DECL(write, ssize_t, (int fd, const void *buf, size_t count));
DARSHAN_FORWARD_DECL(pread, ssize_t, (int fd, void *buf, size_t count, off_t offset));
DARSHAN_FORWARD_DECL(pwrite, ssize_t, (int fd, const void *buf, size_t count, off_t offset));
DARSHAN_FORWARD_DECL(pread64, ssize_t, (int fd, void *buf, size_t count, off64_t offset));
DARSHAN_FORWARD_DECL(pwrite64, ssize_t, (int fd, const void *buf, size_t count, off64_t offset));
DARSHAN_FORWARD_DECL(readv, ssize_t, (int fd, const struct iovec *iov, int iovcnt));
DARSHAN_FORWARD_DECL(writev, ssize_t, (int fd, const struct iovec *iov, int iovcnt));
54 55 56 57 58 59 60 61 62
DARSHAN_FORWARD_DECL(fread, size_t, (void *ptr, size_t size, size_t nmemb, FILE *stream));
DARSHAN_FORWARD_DECL(fwrite, size_t, (const void *ptr, size_t size, size_t nmemb, FILE *stream));
DARSHAN_FORWARD_DECL(lseek, off_t, (int fd, off_t offset, int whence));
DARSHAN_FORWARD_DECL(lseek64, off64_t, (int fd, off64_t offset, int whence));
DARSHAN_FORWARD_DECL(fseek, int, (FILE *stream, long offset, int whence));
/* stats */
/* mmaps */
DARSHAN_FORWARD_DECL(fsync, int, (int fd));
DARSHAN_FORWARD_DECL(fdatasync, int, (int fd));
63
DARSHAN_FORWARD_DECL(close, int, (int fd));
64
DARSHAN_FORWARD_DECL(fclose, int, (FILE *fp));
65

66 67 68 69 70 71 72 73 74 75 76 77 78 79
static void posix_runtime_initialize(void);
static struct posix_file_runtime* posix_file_by_name(const char *name);
static struct posix_file_runtime* posix_file_by_name_setfd(const char* name, int fd);
static struct posix_file_runtime* posix_file_by_fd(int fd);
static void posix_file_close_fd(int fd);

static void posix_disable_instrumentation(void);
static void posix_prepare_for_reduction(darshan_record_id *shared_recs,
    int *shared_rec_count, void **send_buf, void **recv_buf, int *rec_size);
static void posix_record_reduction_op(void* infile_v, void* inoutfile_v,
    int *len, MPI_Datatype *datatype);
static void posix_get_output_data(void **buffer, int *size);
static void posix_shutdown(void);

80 81 82 83 84 85 86 87 88 89 90 91 92
enum posix_io_type
{
    POSIX_READ = 1,
    POSIX_WRITE = 2,
};

/* The posix_file_runtime structure maintains necessary runtime metadata
 * for the POSIX file record (darshan_posix_file structure, defined in
 * darshan-posix-log-format.h) pointed to by 'file_record'. This metadata
 * assists with the instrumenting of specific statistics in the file record.
 * 'hlink' is a hash table link structure used to add/remove this record
 * from the hash table of POSIX file records for this process. 
 */
93
struct posix_file_runtime
94
{
95
    struct darshan_posix_file* file_record;
96 97 98 99
    int64_t offset;
    int64_t last_byte_read;
    int64_t last_byte_written;
    enum posix_io_type last_io_type;
100 101 102
    double last_meta_end;
    double last_read_end;
    double last_write_end;
103
    UT_hash_handle hlink;
104
};
105

106 107 108 109 110 111 112 113 114 115 116 117
/* The posix_file_runtime_ref structure is used to associate a POSIX
 * file descriptor with an already existing POSIX file record. This is
 * necessary as many POSIX I/O functions take only an input file descriptor,
 * but POSIX file records are indexed by their full file paths (i.e., darshan
 * record identifiers for POSIX files are created by hashing the file path).
 * In other words, this structure is necessary as it allows us to look up a
 * file record either by a pathname (posix_file_runtime) or by POSIX file
 * descriptor (posix_file_runtime_ref), depending on which parameters are
 * available. This structure includes another hash table link, since separate
 * hashes are maintained for posix_file_runtime structures and posix_file_runtime_ref
 * structures.
 */
118
struct posix_file_runtime_ref
119
{
120
    struct posix_file_runtime* file;
121 122 123 124
    int fd;
    UT_hash_handle hlink;
};

125 126 127 128
/* The posix_runtime structure maintains necessary state for storing
 * POSIX file records and for coordinating with darshan-core at 
 * shutdown time.
 */
129 130
struct posix_runtime
{
131
    struct posix_file_runtime* file_runtime_array;
132
    struct darshan_posix_file* file_record_array;
133
    int file_array_size;
134
    int file_array_ndx;
135 136
    struct posix_file_runtime* file_hash;
    struct posix_file_runtime_ref* fd_hash;
137 138
    void *red_buf;
    int shared_rec_count;
139 140
};

141
static struct posix_runtime *posix_runtime = NULL;
142
static pthread_mutex_t posix_runtime_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
Shane Snyder's avatar
Shane Snyder committed
143
static int instrumentation_disabled = 0;
144
static int my_rank = -1;
145 146 147

#define POSIX_LOCK() pthread_mutex_lock(&posix_runtime_mutex)
#define POSIX_UNLOCK() pthread_mutex_unlock(&posix_runtime_mutex)
148

149
#define POSIX_RECORD_OPEN(__ret, __path, __mode, __stream_flag, __tm1, __tm2) do { \
150
    struct posix_file_runtime* file; \
151 152 153
    char* exclude; \
    int tmp_index = 0; \
    if(__ret < 0) break; \
154
    while((exclude = darshan_path_exclusions[tmp_index])) { \
155 156 157 158 159
        if(!(strncmp(exclude, __path, strlen(exclude)))) \
            break; \
        tmp_index++; \
    } \
    if(exclude) break; \
160
    file = posix_file_by_name_setfd(__path, __ret); \
161
    if(!file) break; \
162
    /* CP_STAT_FILE(file, __path, __ret); */ \
163
    file->file_record->rank = my_rank; \
164
    if(__mode) \
165 166 167 168
        DARSHAN_COUNTER_SET(file->file_record, POSIX_MODE, __mode); \
    file->offset = 0; \
    file->last_byte_written = 0; \
    file->last_byte_read = 0; \
169
    if(__stream_flag)\
170
        DARSHAN_COUNTER_INC(file->file_record, POSIX_FOPENS, 1); \
171
    else \
172 173 174 175
        DARSHAN_COUNTER_INC(file->file_record, POSIX_OPENS, 1); \
    if(DARSHAN_COUNTER_F_VALUE(file->file_record, POSIX_F_OPEN_TIMESTAMP) == 0) \
        DARSHAN_COUNTER_F_SET(file->file_record, POSIX_F_OPEN_TIMESTAMP, __tm1); \
    DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record, __tm1, __tm2, file->last_meta_end, POSIX_F_META_TIME); \
176 177 178
} while(0)

#define POSIX_RECORD_READ(__ret, __fd, __pread_flag, __pread_offset, __aligned, __stream_flag, __tm1, __tm2) do{ \
179 180
    /* size_t stride; */\
    int64_t this_offset; \
181 182 183 184 185 186
    struct posix_file_runtime* file; \
    /* int64_t file_alignment; */ \
    double __elapsed = __tm2-__tm1; \
    if(__ret < 0) break; \
    file = posix_file_by_fd(__fd); \
    if(!file) break; \
187
    if(__pread_flag) \
188 189 190
        this_offset = __pread_offset; \
    else \
        this_offset = file->offset; \
191
    /* file_alignment = CP_VALUE(file, CP_FILE_ALIGNMENT); */\
192
    if(this_offset > file->last_byte_read) \
193
        DARSHAN_COUNTER_INC(file->file_record, POSIX_SEQ_READS, 1); \
194
    if(this_offset == (file->last_byte_read + 1)) \
195 196
        DARSHAN_COUNTER_INC(file->file_record, POSIX_CONSEC_READS, 1); \
    /* if(this_offset > 0 && this_offset > file->last_byte_read \
197 198 199
        && file->last_byte_read != 0) \
        stride = this_offset - file->last_byte_read - 1; \
    else \
200
        stride = 0; */\
201 202
    file->last_byte_read = this_offset + __ret - 1; \
    file->offset = this_offset + __ret; \
203 204
    DARSHAN_COUNTER_MAX(file->file_record, POSIX_MAX_BYTE_READ, (this_offset + __ret - 1)); \
    DARSHAN_COUNTER_INC(file->file_record, POSIX_BYTES_READ, __ret); \
205
    if(__stream_flag)\
206
        DARSHAN_COUNTER_INC(file->file_record, POSIX_FREADS, 1); \
207
    else\
208
        DARSHAN_COUNTER_INC(file->file_record, POSIX_READS, 1); \
209 210 211 212 213 214
    /* CP_BUCKET_INC(file, CP_SIZE_READ_0_100, __ret); \
    cp_access_counter(file, stride, CP_COUNTER_STRIDE); \
    if(!__aligned) \
        CP_INC(file, CP_MEM_NOT_ALIGNED, 1); \
    if(file_alignment > 0 && (this_offset % file_alignment) != 0) \
        CP_INC(file, CP_FILE_NOT_ALIGNED, 1); \
215 216 217 218 219 220 221 222 223 224 225
    cp_access_counter(file, __ret, CP_COUNTER_ACCESS); */\
    if(file->last_io_type == POSIX_WRITE) \
        DARSHAN_COUNTER_INC(file->file_record, POSIX_RW_SWITCHES, 1); \
    file->last_io_type = POSIX_READ; \
    DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record, __tm1, __tm2, file->last_read_end, POSIX_F_READ_TIME); \
    if(DARSHAN_COUNTER_F_VALUE(file->file_record, POSIX_F_READ_START_TIMESTAMP) == 0) \
        DARSHAN_COUNTER_F_SET(file->file_record, POSIX_F_READ_START_TIMESTAMP, __tm1); \
    DARSHAN_COUNTER_F_SET(file->file_record, POSIX_F_READ_END_TIMESTAMP, __tm2); \
    if(DARSHAN_COUNTER_F_VALUE(file->file_record, POSIX_F_MAX_READ_TIME) < __elapsed){ \
        DARSHAN_COUNTER_F_SET(file->file_record, POSIX_F_MAX_READ_TIME, __elapsed); \
        DARSHAN_COUNTER_SET(file->file_record, POSIX_MAX_READ_TIME_SIZE, __ret); } \
226 227 228
} while(0)

#define POSIX_RECORD_WRITE(__ret, __fd, __pwrite_flag, __pwrite_offset, __aligned, __stream_flag, __tm1, __tm2) do{ \
229 230
    /* size_t stride; */\
    int64_t this_offset; \
231 232 233 234 235 236
    struct posix_file_runtime* file; \
    /* int64_t file_alignment; */ \
    double __elapsed = __tm2-__tm1; \
    if(__ret < 0) break; \
    file = posix_file_by_fd(__fd); \
    if(!file) break; \
237
    if(__pwrite_flag) \
238 239 240
        this_offset = __pwrite_offset; \
    else \
        this_offset = file->offset; \
241
    /* file_alignment = CP_VALUE(file, CP_FILE_ALIGNMENT); */\
242
    if(this_offset > file->last_byte_written) \
243
        DARSHAN_COUNTER_INC(file->file_record, POSIX_SEQ_WRITES, 1); \
244
    if(this_offset == (file->last_byte_written + 1)) \
245 246
        DARSHAN_COUNTER_INC(file->file_record, POSIX_CONSEC_WRITES, 1); \
    /* if(this_offset > 0 && this_offset > file->last_byte_written \
247 248
        && file->last_byte_written != 0) \
        stride = this_offset - file->last_byte_written - 1; \
249
    else \
250
        stride = 0; */\
251 252
    file->last_byte_written = this_offset + __ret - 1; \
    file->offset = this_offset + __ret; \
253 254
    DARSHAN_COUNTER_MAX(file->file_record, POSIX_MAX_BYTE_WRITTEN, (this_offset + __ret - 1)); \
    DARSHAN_COUNTER_INC(file->file_record, POSIX_BYTES_WRITTEN, __ret); \
255
    if(__stream_flag) \
256
        DARSHAN_COUNTER_INC(file->file_record, POSIX_FWRITES, 1); \
257
    else \
258
        DARSHAN_COUNTER_INC(file->file_record, POSIX_WRITES, 1); \
259 260 261 262 263 264
    /* CP_BUCKET_INC(file, CP_SIZE_WRITE_0_100, __ret); \
    cp_access_counter(file, stride, CP_COUNTER_STRIDE); \
    if(!__aligned) \
        CP_INC(file, CP_MEM_NOT_ALIGNED, 1); \
    if(file_alignment > 0 && (this_offset % file_alignment) != 0) \
        CP_INC(file, CP_FILE_NOT_ALIGNED, 1); \
265 266 267 268 269 270 271 272 273 274 275
    cp_access_counter(file, __ret, CP_COUNTER_ACCESS); */\
    if(file->last_io_type == POSIX_READ) \
        DARSHAN_COUNTER_INC(file->file_record, POSIX_RW_SWITCHES, 1); \
    file->last_io_type = POSIX_WRITE; \
    DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record, __tm1, __tm2, file->last_write_end, POSIX_F_WRITE_TIME); \
    if(DARSHAN_COUNTER_F_VALUE(file->file_record, POSIX_F_WRITE_START_TIMESTAMP) == 0) \
        DARSHAN_COUNTER_F_SET(file->file_record, POSIX_F_WRITE_START_TIMESTAMP, __tm1); \
    DARSHAN_COUNTER_F_SET(file->file_record, POSIX_F_WRITE_END_TIMESTAMP, __tm2); \
    if(DARSHAN_COUNTER_F_VALUE(file->file_record, POSIX_F_MAX_WRITE_TIME) < __elapsed){ \
        DARSHAN_COUNTER_F_SET(file->file_record, POSIX_F_MAX_WRITE_TIME, __elapsed); \
        DARSHAN_COUNTER_SET(file->file_record, POSIX_MAX_WRITE_TIME_SIZE, __ret); } \
276
} while(0)
277

278 279 280 281
/**********************************************************
 *      Wrappers for POSIX I/O functions of interest      * 
 **********************************************************/

282
int DARSHAN_DECL(open)(const char *path, int flags, ...)
283 284 285 286 287
{
    int mode = 0;
    int ret;
    double tm1, tm2;

288 289
    MAP_OR_FAIL(open);

290
    if(flags & O_CREAT) 
291 292 293 294 295 296
    {
        va_list arg;
        va_start(arg, flags);
        mode = va_arg(arg, int);
        va_end(arg);

297
        tm1 = darshan_core_wtime();
298
        ret = __real_open(path, flags, mode);
299
        tm2 = darshan_core_wtime();
300 301 302
    }
    else
    {
303
        tm1 = darshan_core_wtime();
304
        ret = __real_open(path, flags);
305
        tm2 = darshan_core_wtime();
306 307
    }

308 309
    POSIX_LOCK();
    posix_runtime_initialize();
310
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
311
    POSIX_UNLOCK();
312 313 314 315

    return(ret);
}

Shane Snyder's avatar
Shane Snyder committed
316 317 318 319 320 321
int DARSHAN_DECL(open64)(const char *path, int flags, ...)
{
    int mode = 0;
    int ret;
    double tm1, tm2;

322
    MAP_OR_FAIL(open64);
Shane Snyder's avatar
Shane Snyder committed
323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343

    if(flags & O_CREAT)
    {
        va_list arg;
        va_start(arg, flags);
        mode = va_arg(arg, int);
        va_end(arg);

        tm1 = darshan_core_wtime();
        ret = __real_open64(path, flags, mode);
        tm2 = darshan_core_wtime();
    }
    else
    {
        tm1 = darshan_core_wtime();
        ret = __real_open64(path, flags);
        tm2 = darshan_core_wtime();
    }

    POSIX_LOCK();
    posix_runtime_initialize();
344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

int DARSHAN_DECL(creat)(const char* path, mode_t mode)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(creat);

    tm1 = darshan_core_wtime();
    ret = __real_creat(path, mode);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

int DARSHAN_DECL(creat64)(const char* path, mode_t mode)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(creat64);
Shane Snyder's avatar
Shane Snyder committed
375

376 377 378 379 380 381
    tm1 = darshan_core_wtime();
    ret = __real_creat64(path, mode);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
Shane Snyder's avatar
Shane Snyder committed
382 383 384 385 386 387
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437
FILE* DARSHAN_DECL(fopen)(const char *path, const char *mode)
{
    FILE* ret;
    int fd;
    double tm1, tm2;

    MAP_OR_FAIL(fopen);

    tm1 = darshan_core_wtime();
    ret = __real_fopen(path, mode);
    tm2 = darshan_core_wtime();

    if(ret == NULL)
        fd = -1;
    else
        fd = fileno(ret);

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_OPEN(fd, path, 0, 1, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

FILE* DARSHAN_DECL(fopen64)(const char *path, const char *mode)
{
    FILE* ret;
    int fd;
    double tm1, tm2;

    MAP_OR_FAIL(fopen64);

    tm1 = darshan_core_wtime();
    ret = __real_fopen64(path, mode);
    tm2 = darshan_core_wtime();

    if(ret == NULL)
        fd = -1;
    else
        fd = fileno(ret);

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_OPEN(fd, path, 0, 1, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590
ssize_t DARSHAN_DECL(read)(int fd, void *buf, size_t count)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(write);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_read(fd, buf, count);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_READ(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(write)(int fd, const void *buf, size_t count)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(write);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_write(fd, buf, count);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_WRITE(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pread)(int fd, void *buf, size_t count, off_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pread);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pread(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_READ(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pwrite)(int fd, const void *buf, size_t count, off_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pwrite);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pwrite(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_WRITE(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pread64)(int fd, void *buf, size_t count, off64_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pread64);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pread64(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_READ(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pwrite64)(int fd, const void *buf, size_t count, off64_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pwrite64);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pwrite64(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_WRITE(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(readv)(int fd, const struct iovec *iov, int iovcnt)
{
    ssize_t ret;
    int aligned_flag = 0;
    /* int aligned_flag = 1; */
    int i;
    double tm1, tm2;

    MAP_OR_FAIL(readv);
/*
    for(i=0; i<iovcnt; i++)
    {
        if(((unsigned long)iov[i].iov_base % darshan_mem_alignment) != 0)
            aligned_flag = 0;
    }*/

    tm1 = darshan_core_wtime();
    ret = __real_readv(fd, iov, iovcnt);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
591
    posix_runtime_initialize();
592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618
    POSIX_RECORD_READ(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(writev)(int fd, const struct iovec *iov, int iovcnt)
{
    ssize_t ret;
    int aligned_flag = 0;
    /* int aligned_flag = 1; */
    int i;
    double tm1, tm2;

    MAP_OR_FAIL(writev);
/*
    for(i=0; i<iovcnt; i++)
    {
        if(((unsigned long)iov[i].iov_base % darshan_mem_alignment) != 0)
            aligned_flag = 0;
    }*/

    tm1 = darshan_core_wtime();
    ret = __real_writev(fd, iov, iovcnt);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
619
    posix_runtime_initialize();
620 621 622 623 624 625
    POSIX_RECORD_WRITE(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835
size_t DARSHAN_DECL(fread)(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
    size_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(fread);

    /* if((unsigned long)ptr % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_fread(ptr, size, nmemb, stream);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    if(ret > 0)
    {
        POSIX_RECORD_READ(size*ret, fileno(stream), 0, 0,
            aligned_flag, 1, tm1, tm2);
    }
    else
    {
        POSIX_RECORD_READ(ret, fileno(stream), 0, 0,
            aligned_flag, 1, tm1, tm2);
    }
    POSIX_UNLOCK();

    return(ret);
}

size_t DARSHAN_DECL(fwrite)(const void *ptr, size_t size, size_t nmemb, FILE *stream)
{
    size_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(fwrite);

    /* if((unsigned long)ptr % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_fwrite(ptr, size, nmemb, stream);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    if(ret > 0)
    {
        POSIX_RECORD_WRITE(size*ret, fileno(stream), 0, 0,
            aligned_flag, 1, tm1, tm2);
    }
    else
    {
        POSIX_RECORD_WRITE(ret, fileno(stream), 0, 0,
            aligned_flag, 1, tm1, tm2);
    }
    POSIX_UNLOCK();

    return(ret);
}

off_t DARSHAN_DECL(lseek)(int fd, off_t offset, int whence)
{
    off_t ret;
    struct posix_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(lseek);

    tm1 = darshan_core_wtime();
    ret = __real_lseek(fd, offset, whence);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        POSIX_LOCK();
        posix_runtime_initialize();
        file = posix_file_by_fd(fd);
        if(file)
        {
            file->offset = ret;
            DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record,
                tm1, tm2, file->last_meta_end, POSIX_F_META_TIME);
            DARSHAN_COUNTER_INC(file->file_record, POSIX_SEEKS, 1);
        }
        POSIX_UNLOCK();
    }

    return(ret);
}

off_t DARSHAN_DECL(lseek64)(int fd, off_t offset, int whence)
{
    off_t ret;
    struct posix_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(lseek64);

    tm1 = darshan_core_wtime();
    ret = __real_lseek64(fd, offset, whence);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        POSIX_LOCK();
        posix_runtime_initialize();
        file = posix_file_by_fd(fd);
        if(file)
        {
            file->offset = ret;
            DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record,
                tm1, tm2, file->last_meta_end, POSIX_F_META_TIME);
            DARSHAN_COUNTER_INC(file->file_record, POSIX_SEEKS, 1);
        }
        POSIX_UNLOCK();
    }

    return(ret);
}

int DARSHAN_DECL(fseek)(FILE *stream, long offset, int whence)
{
    int ret;
    struct posix_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fseek);

    tm1 = darshan_core_wtime();
    ret = __real_fseek(stream, offset, whence);
    tm2 = darshan_core_wtime();

    if(ret >= 0)
    {
        POSIX_LOCK();
        posix_runtime_initialize();
        file = posix_file_by_fd(fileno(stream));
        if(file)
        {
            file->offset = ftell(stream); /* TODO: this seems wrong. ftell? */
            DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record,
                tm1, tm2, file->last_meta_end, POSIX_F_META_TIME);
            DARSHAN_COUNTER_INC(file->file_record, POSIX_FSEEKS, 1);
        }
        POSIX_UNLOCK();
    }

    return(ret);
}

int DARSHAN_DECL(fsync)(int fd)
{
    int ret;
    struct posix_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fsync);

    tm1 = darshan_core_wtime();
    ret = __real_fsync(fd);
    tm2 = darshan_core_wtime();

    if(ret < 0)
        return(ret);

    POSIX_LOCK();
    posix_runtime_initialize();
    file = posix_file_by_fd(fd);
    if(file)
    {
        DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record,
            tm1, tm2, file->last_write_end, POSIX_F_WRITE_TIME);
        DARSHAN_COUNTER_INC(file->file_record, POSIX_FSYNCS, 1);
    }
    POSIX_UNLOCK();

    return(ret);
}

int DARSHAN_DECL(fdatasync)(int fd)
{
    int ret;
    struct posix_file_runtime* file;
    double tm1, tm2;

    MAP_OR_FAIL(fdatasync);

    tm1 = darshan_core_wtime();
    ret = __real_fdatasync(fd);
    tm2 = darshan_core_wtime();

    if(ret < 0)
        return(ret);

    POSIX_LOCK();
    posix_runtime_initialize();
    file = posix_file_by_fd(fd);
    if(file)
    {
        DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record,
            tm1, tm2, file->last_write_end, POSIX_F_WRITE_TIME); 
        DARSHAN_COUNTER_INC(file->file_record, POSIX_FDSYNCS, 1);
    }
    POSIX_UNLOCK();

    return(ret);
}

836 837
int DARSHAN_DECL(close)(int fd)
{
838
    struct posix_file_runtime* file;
839 840 841 842 843 844 845 846 847 848 849
    double tm1, tm2;
    int ret;

    MAP_OR_FAIL(close);

    tm1 = darshan_core_wtime();
    ret = __real_close(fd);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
Shane Snyder's avatar
Shane Snyder committed
850 851 852
    file = posix_file_by_fd(fd);
    if(file)
    {
853 854 855 856 857 858
        file->last_byte_written = 0;
        file->last_byte_read = 0;
        DARSHAN_COUNTER_F_SET(file->file_record,
            POSIX_F_CLOSE_TIMESTAMP, darshan_core_wtime());
        DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record,
             tm1, tm2, file->last_meta_end, POSIX_F_META_TIME);
Shane Snyder's avatar
Shane Snyder committed
859 860
        posix_file_close_fd(fd);
    }
861 862 863 864 865
    POSIX_UNLOCK();    

    return(ret);
}

866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896
int DARSHAN_DECL(fclose)(FILE *fp)
{
    struct posix_file_runtime* file;
    int fd = fileno(fp);
    double tm1, tm2;
    int ret;

    MAP_OR_FAIL(fclose);

    tm1 = darshan_core_wtime();
    ret = __real_fclose(fp);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    file = posix_file_by_fd(fd);
    if(file)
    {
        file->last_byte_written = 0;
        file->last_byte_read = 0;
        DARSHAN_COUNTER_F_SET(file->file_record,
            POSIX_F_CLOSE_TIMESTAMP, darshan_core_wtime());
        DARSHAN_COUNTER_F_INC_NO_OVERLAP(file->file_record,
            tm1, tm2, file->last_meta_end, POSIX_F_META_TIME);
        posix_file_close_fd(fd);
    }
    POSIX_UNLOCK();

    return(ret);
}

897 898 899
/**********************************************************
 * Internal functions for manipulating POSIX module state *
 **********************************************************/
900

901
/* initialize internal POSIX module data structures and register with darshan-core */
902
static void posix_runtime_initialize()
903
{
904 905 906
    int mem_limit;
    struct darshan_module_funcs posix_mod_fns =
    {
Shane Snyder's avatar
Shane Snyder committed
907
        .disable_instrumentation = &posix_disable_instrumentation,
908
        .prepare_for_reduction = &posix_prepare_for_reduction,
909
        .record_reduction_op = &posix_record_reduction_op,
910
        .get_output_data = &posix_get_output_data,
911
        .shutdown = &posix_shutdown
912
    };
913

Shane Snyder's avatar
Shane Snyder committed
914 915
    /* don't do anything if already initialized or instrumenation is disabled */
    if(posix_runtime || instrumentation_disabled)
916
        return;
917

918 919
    /* register the posix module with darshan core */
    darshan_core_register_module(
920
        DARSHAN_POSIX_MOD,
921 922 923 924 925 926 927 928 929 930 931 932 933 934
        &posix_mod_fns,
        &mem_limit);

    /* return if no memory assigned by darshan core */
    if(mem_limit == 0)
        return;

    posix_runtime = malloc(sizeof(*posix_runtime));
    if(!posix_runtime)
        return;
    memset(posix_runtime, 0, sizeof(*posix_runtime));

    /* set maximum number of file records according to max memory limit */
    /* NOTE: maximum number of records is based on the size of a posix file record */
935
    /* TODO: should we base memory usage off file record or total runtime structure sizes? */
936
    posix_runtime->file_array_size = mem_limit / sizeof(struct darshan_posix_file);
937
    posix_runtime->file_array_ndx = 0;
938 939

    /* allocate array of runtime file records */
940
    posix_runtime->file_runtime_array = malloc(posix_runtime->file_array_size *
941
                                               sizeof(struct posix_file_runtime));
942 943 944
    posix_runtime->file_record_array = malloc(posix_runtime->file_array_size *
                                              sizeof(struct darshan_posix_file));
    if(!posix_runtime->file_runtime_array || !posix_runtime->file_record_array)
945 946 947 948
    {
        posix_runtime->file_array_size = 0;
        return;
    }
949
    memset(posix_runtime->file_runtime_array, 0, posix_runtime->file_array_size *
950
           sizeof(struct posix_file_runtime));
951 952
    memset(posix_runtime->file_record_array, 0, posix_runtime->file_array_size *
           sizeof(struct darshan_posix_file));
953

Shane Snyder's avatar
Shane Snyder committed
954 955
    /* TODO: can we move this out of here? perhaps register_module returns rank? */
    DARSHAN_MPI_CALL(PMPI_Comm_rank)(MPI_COMM_WORLD, &my_rank);
956

957 958
    return;
}
959

960
/* get a POSIX file record for the given file path */
961
static struct posix_file_runtime* posix_file_by_name(const char *name)
962
{
963
    struct posix_file_runtime *file = NULL;
964
    char *newname = NULL;
965
    darshan_record_id file_id;
966

Shane Snyder's avatar
Shane Snyder committed
967
    if(!posix_runtime || instrumentation_disabled)
968
        return(NULL);
969

970
    newname = darshan_clean_file_path(name);
971
    if(!newname)
972
        newname = (char*)name;
973

974
    /* get a unique id for this file from darshan core */
Shane Snyder's avatar
Shane Snyder committed
975
    darshan_core_register_record(
976 977 978
        (void*)newname,
        strlen(newname),
        1,
979
        DARSHAN_POSIX_MOD,
980
        &file_id);
981

982
    /* search the hash table for this file record, and return if found */
983
    HASH_FIND(hlink, posix_runtime->file_hash, &file_id, sizeof(darshan_record_id), file);
984
    if(file)
985
    {
986
        if(newname != name)
987
            free(newname);
988
        return(file);
989 990
    }

991 992 993 994 995 996
    if(posix_runtime->file_array_ndx < posix_runtime->file_array_size);
    {
        /* no existing record, assign a new file record from the global array */
        file = &(posix_runtime->file_runtime_array[posix_runtime->file_array_ndx]);
        file->file_record = &(posix_runtime->file_record_array[posix_runtime->file_array_ndx]);
        file->file_record->f_id = file_id;
997

998
        /* add new record to file hash table */
999
        HASH_ADD(hlink, posix_runtime->file_hash, file_record->f_id, sizeof(darshan_record_id), file);
1000

1001 1002
        posix_runtime->file_array_ndx++;
    }
1003 1004

    if(newname != name)
1005
        free(newname);
1006 1007 1008
    return(file);
}

1009 1010 1011
/* get a POSIX file record for the given file path, and also create a
 * reference structure using the returned file descriptor
 */
1012
static struct posix_file_runtime* posix_file_by_name_setfd(const char* name, int fd)
1013
{
1014 1015
    struct posix_file_runtime* file;
    struct posix_file_runtime_ref* ref;
1016

Shane Snyder's avatar
Shane Snyder committed
1017
    if(!posix_runtime || instrumentation_disabled)
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
        return(NULL);

    /* find file record by name first */
    file = posix_file_by_name(name);

    if(!file)
        return(NULL);

    /* search hash table for existing file ref for this fd */
    HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
    if(ref)
    {
        /* we have a reference.  Make sure it points to the correct file
         * and return it
         */
        ref->file = file;
        return(file);
    }

    /* if we hit this point, then we don't have a reference for this fd
     * in the table yet.  Add it.
     */
    ref = malloc(sizeof(*ref));
    if(!ref)
        return(NULL);
    memset(ref, 0, sizeof(*ref));
Shane Snyder's avatar
Shane Snyder committed
1044

1045 1046 1047 1048 1049 1050 1051
    ref->file = file;
    ref->fd = fd;    
    HASH_ADD(hlink, posix_runtime->fd_hash, fd, sizeof(int), ref);

    return(file);
}

1052
/* get a POSIX file record for the given file descriptor */
1053
static struct posix_file_runtime* posix_file_by_fd(int fd)
Shane Snyder's avatar
Shane Snyder committed
1054
{
1055
    struct posix_file_runtime_ref* ref;
Shane Snyder's avatar
Shane Snyder committed
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067

    if(!posix_runtime || instrumentation_disabled)
        return(NULL);

    /* search hash table for existing file ref for this fd */
    HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
    if(ref)
        return(ref->file);

    return(NULL);
}

1068
/* free up reference data structures for the given file descriptor */
1069 1070
static void posix_file_close_fd(int fd)
{
1071
    struct posix_file_runtime_ref* ref;
1072

Shane Snyder's avatar
Shane Snyder committed
1073
    if(!posix_runtime || instrumentation_disabled)
1074 1075 1076 1077
        return;

    /* search hash table for this fd */
    HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
1078
    if(ref)
1079 1080 1081 1082 1083 1084 1085
    {
        /* we have a reference, delete it */
        HASH_DELETE(hlink, posix_runtime->fd_hash, ref);
        free(ref);
    }

    return;
1086 1087
}

1088
/* compare function for sorting file records by descending rank */
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
static int posix_file_compare(const void* a, const void* b)
{
    const struct darshan_posix_file* f_a = a;
    const struct darshan_posix_file* f_b = b;

    if(f_a->rank < f_b->rank)
        return 1;
    if(f_a->rank > f_b->rank)
        return -1;

    return 0;
}

1102 1103 1104
/************************************************************************
 * Functions exported by this module for coordinating with darshan-core *
 ************************************************************************/
1105

Shane Snyder's avatar
Shane Snyder committed
1106
static void posix_disable_instrumentation()
1107
{
1108 1109
    assert(posix_runtime);

Shane Snyder's avatar
Shane Snyder committed
1110 1111 1112
    POSIX_LOCK();
    instrumentation_disabled = 1;
    POSIX_UNLOCK();
1113

Shane Snyder's avatar
Shane Snyder committed
1114 1115 1116
    return;
}

1117 1118 1119 1120 1121 1122 1123
static void posix_prepare_for_reduction(
    darshan_record_id *shared_recs,
    int *shared_rec_count,
    void **send_buf,
    void **recv_buf,
    int *rec_size)
{
1124
    struct posix_file_runtime *file;
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
    int i;

    assert(posix_runtime);

    /* necessary initialization of shared records (e.g., change rank to -1) */
    for(i = 0; i < *shared_rec_count; i++)
    {
        HASH_FIND(hlink, posix_runtime->file_hash, &shared_recs[i],
            sizeof(darshan_record_id), file);
        assert(file);

        /* TODO: any initialization before reduction */
        file->file_record->rank = -1;
    }

    /* sort the array of files descending by rank so that we get all of the 
     * shared files (marked by rank -1) in a contiguous portion at end 
     * of the array
     */
    qsort(posix_runtime->file_record_array, posix_runtime->file_array_ndx,
        sizeof(struct darshan_posix_file), posix_file_compare);

    /* make *send_buf point to the shared files at the end of sorted array */
    *send_buf =
        &(posix_runtime->file_record_array[posix_runtime->file_array_ndx-(*shared_rec_count)]);

    /* allocate memory for the reduction output on rank 0 */
    if(my_rank == 0)
    {
        *recv_buf = malloc(*shared_rec_count * sizeof(struct darshan_posix_file));
        if(!(*recv_buf))
            return;
    }

    *rec_size = sizeof(struct darshan_posix_file);

Shane Snyder's avatar
Shane Snyder committed
1161
    /* TODO: cleaner way to do this? */
1162 1163 1164 1165 1166 1167 1168
    if(my_rank == 0)
        posix_runtime->red_buf = *recv_buf;
    posix_runtime->shared_rec_count = *shared_rec_count;

    return;
}

1169
static void posix_record_reduction_op(
1170 1171 1172 1173
    void* infile_v,
    void* inoutfile_v,
    int *len,
    MPI_Datatype *datatype)
Shane Snyder's avatar
Shane Snyder committed
1174
{
1175 1176 1177 1178
    struct darshan_posix_file tmp_file;
    struct darshan_posix_file *infile = infile_v;
    struct darshan_posix_file *inoutfile = inoutfile_v;
    int i;
1179
    int j;
1180 1181 1182

    assert(posix_runtime);

1183
    for(i=0; i<*len; i++)
1184 1185 1186 1187 1188 1189
    {
        memset(&tmp_file, 0, sizeof(struct darshan_posix_file));

        tmp_file.f_id = infile->f_id;
        tmp_file.rank = -1;

1190
        /* sum */
1191
        for(j=POSIX_OPENS; j<=POSIX_FDSYNCS; j++)
1192 1193 1194 1195 1196 1197
        {
            tmp_file.counters[j] = infile->counters[j] + inoutfile->counters[j];
        }

        tmp_file.counters[POSIX_MODE] = infile->counters[POSIX_MODE];

1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
        /* sum */
        for(j=POSIX_BYTES_READ; j<=POSIX_BYTES_WRITTEN; j++)
        {
            tmp_file.counters[j] = infile->counters[j] + inoutfile->counters[j];
        }

        /* max */
        for(j=POSIX_MAX_BYTE_READ; j<=POSIX_MAX_BYTE_WRITTEN; j++)
        {
            tmp_file.counters[j] = (
                (infile->counters[j] > inoutfile->counters[j]) ?
                infile->counters[j] :
                inoutfile->counters[j]);
        }

        /* sum */
        for(j=POSIX_CONSEC_READS; j<=POSIX_RW_SWITCHES; j++)
        {
            tmp_file.counters[j] = infile->counters[j] +
                inoutfile->counters[j];
        }

1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
        /* min non-zero (if available) value */
        for(j=POSIX_F_OPEN_TIMESTAMP; j<=POSIX_F_WRITE_START_TIMESTAMP; j++)
        {
            if(infile->fcounters[j] > inoutfile->fcounters[j] && inoutfile->fcounters[j] > 0)
                tmp_file.fcounters[j] = inoutfile->fcounters[j];
            else
                tmp_file.fcounters[j] = infile->fcounters[j];
        }

        /* max */
        for(j=POSIX_F_READ_END_TIMESTAMP; j<=POSIX_F_CLOSE_TIMESTAMP; j++)
        {
            if(infile->fcounters[j] > inoutfile->fcounters[j])
                tmp_file.fcounters[j] = infile->fcounters[j];
            else
                tmp_file.fcounters[j] = inoutfile->fcounters[j];
        }

        /* sum */
        for(j=POSIX_F_READ_TIME; j<=POSIX_F_META_TIME; j++)
        {
            tmp_file.fcounters[j] = infile->fcounters[j] + inoutfile->fcounters[j];
        }

        /* max (special case) */
        if(infile->fcounters[POSIX_F_MAX_READ_TIME] >
            inoutfile->fcounters[POSIX_F_MAX_READ_TIME])
        {
            tmp_file.fcounters[POSIX_F_MAX_READ_TIME] =
                infile->fcounters[POSIX_F_MAX_READ_TIME];
            tmp_file.counters[POSIX_MAX_READ_TIME_SIZE] =
                infile->counters[POSIX_MAX_READ_TIME_SIZE];
        }
1253
        else
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
        {
            tmp_file.fcounters[POSIX_F_MAX_READ_TIME] =
                inoutfile->fcounters[POSIX_F_MAX_READ_TIME];
            tmp_file.counters[POSIX_MAX_READ_TIME_SIZE] =
                inoutfile->counters[POSIX_MAX_READ_TIME_SIZE];
        }

        if(infile->fcounters[POSIX_F_MAX_WRITE_TIME] >
            inoutfile->fcounters[POSIX_F_MAX_WRITE_TIME])
        {
            tmp_file.fcounters[POSIX_F_MAX_WRITE_TIME] =
                infile->fcounters[POSIX_F_MAX_WRITE_TIME];
            tmp_file.counters[POSIX_MAX_WRITE_TIME_SIZE] =
                infile->counters[POSIX_MAX_WRITE_TIME_SIZE];
        }
1269
        else
1270 1271 1272 1273 1274 1275
        {
            tmp_file.fcounters[POSIX_F_MAX_WRITE_TIME] =
                inoutfile->fcounters[POSIX_F_MAX_WRITE_TIME];
            tmp_file.counters[POSIX_MAX_WRITE_TIME_SIZE] =
                inoutfile->counters[POSIX_MAX_WRITE_TIME_SIZE];
        }
1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291

        /* update pointers */
        *inoutfile = tmp_file;
        inoutfile++;
        infile++;
    }

    return;
}

static void posix_get_output_data(
    void **buffer,
    int *size)
{
    assert(posix_runtime);

Shane Snyder's avatar
Shane Snyder committed
1292
    /* TODO: cleaner way to do this? */
1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304
    /* clean up reduction state */
    if(my_rank == 0)
    {
        int tmp_ndx = posix_runtime->file_array_ndx - posix_runtime->shared_rec_count;
        memcpy(&(posix_runtime->file_record_array[tmp_ndx]), posix_runtime->red_buf,
            posix_runtime->shared_rec_count * sizeof(struct darshan_posix_file));
        free(posix_runtime->red_buf);
    }
    else
    {
        posix_runtime->file_array_ndx -= posix_runtime->shared_rec_count;
    }
1305 1306 1307

    *buffer = (void *)(posix_runtime->file_record_array);
    *size = posix_runtime->file_array_ndx * sizeof(struct darshan_posix_file);
1308

1309
    return;
1310 1311
}

1312
static void posix_shutdown()
1313
{
1314
    struct posix_file_runtime_ref *ref, *tmp;
1315 1316 1317 1318 1319 1320

    HASH_ITER(hlink, posix_runtime->fd_hash, ref, tmp)
    {
        HASH_DELETE(hlink, posix_runtime->fd_hash, ref);
        free(ref);
    }
1321

1322
    HASH_CLEAR(hlink, posix_runtime->file_hash); /* these entries are freed all at once below */
1323 1324 1325 1326 1327

    free(posix_runtime->file_runtime_array);
    free(posix_runtime->file_record_array);
    free(posix_runtime);
    posix_runtime = NULL;
1328 1329

    return;
1330 1331
}

1332 1333 1334 1335 1336 1337 1338 1339
/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ts=8 sts=4 sw=4 expandtab
 */