darshan-mpiio.c 42.4 KB
Newer Older
Philip Carns's avatar
Philip Carns committed
1
/*
Shane Snyder's avatar
Shane Snyder committed
2 3 4
 * Copyright (C) 2015 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
Philip Carns's avatar
Philip Carns committed
5 6
 */

7 8 9
#define _XOPEN_SOURCE 500
#define _GNU_SOURCE

Philip Carns's avatar
Philip Carns committed
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
#include "darshan-runtime-config.h"
#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 <search.h>
#include <assert.h>
#include <pthread.h>

#include "darshan.h"
Shane Snyder's avatar
Shane Snyder committed
26
#include "darshan-dynamic.h"
Philip Carns's avatar
Philip Carns committed
27

28
/* The mpiio_file_record_ref structure maintains necessary runtime metadata
29
 * for the MPIIO file record (darshan_mpiio_file structure, defined in
30
 * darshan-mpiio-log-format.h) pointed to by 'file_rec'. This metadata
31 32 33 34 35 36
 * assists with the instrumenting of specific statistics in the file record.
 *
 * RATIONALE: the MPIIO module needs to track some stateful, volatile 
 * information about each open file (like the current file offset, most recent 
 * access time, etc.) to aid in instrumentation, but this information can't be
 * stored in the darshan_mpiio_file struct because we don't want it to appear in
37 38 39 40
 * the final darshan log file.  We therefore associate a mpiio_file_record_ref
 * struct with each darshan_mpiio_file struct in order to track this information
 * (i.e., the mapping between mpiio_file_record_ref structs to darshan_mpiio_file
 * structs is one-to-one).
41
 *
42 43 44 45 46 47 48
 * NOTE: we use the 'darshan_record_ref' interface (in darshan-common) to
 * associate different types of handles with this mpiio_file_record_ref struct.
 * This allows us to index this struct (and the underlying file record) by using
 * either the corresponding Darshan record identifier (derived from the filename)
 * or by a generated MPI file handle, for instance. So, while there should only
 * be a single Darshan record identifier that indexes a mpiio_file_record_ref,
 * there could be multiple open file handles that index it.
49
 */
50
struct mpiio_file_record_ref
Philip Carns's avatar
Philip Carns committed
51
{
52
    struct darshan_mpiio_file *file_rec;
Shane Snyder's avatar
Shane Snyder committed
53
    enum darshan_io_type last_io_type;
54 55 56
    double last_meta_end;
    double last_read_end;
    double last_write_end;
57 58
    void *access_root;
    int access_count;
Philip Carns's avatar
Philip Carns committed
59 60
};

61 62 63 64
/* The mpiio_runtime structure maintains necessary state for storing
 * MPI-IO file records and for coordinating with darshan-core at 
 * shutdown time.
 */
Philip Carns's avatar
Philip Carns committed
65 66
struct mpiio_runtime
{
67 68 69
    void *rec_id_hash;
    void *fh_hash;
    int file_rec_count;
Philip Carns's avatar
Philip Carns committed
70 71
};

72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
static void mpiio_runtime_initialize(
    void);
static struct mpiio_file_record_ref *mpiio_track_new_file_record(
    darshan_record_id rec_id, const char *path);
static int mpiio_record_compare(
    const void* a, const void* b);
static void mpiio_finalize_file_records(
    void *rec_ref_p);
static void mpiio_record_reduction_op(
    void* infile_v, void* inoutfile_v, int *len, MPI_Datatype *datatype);
static void mpiio_shared_record_variance(
    MPI_Comm mod_comm, struct darshan_mpiio_file *inrec_array,
    struct darshan_mpiio_file *outrec_array, int shared_rec_count);
static void mpiio_cleanup_runtime(
    void);

static void mpiio_shutdown(
    MPI_Comm mod_comm, darshan_record_id *shared_recs,
    int shared_rec_count, void **mpiio_buf, int *mpiio_buf_sz);

Philip Carns's avatar
Philip Carns committed
92 93 94 95 96
static struct mpiio_runtime *mpiio_runtime = NULL;
static pthread_mutex_t mpiio_runtime_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
static int instrumentation_disabled = 0;
static int my_rank = -1;

97 98 99
#define MPIIO_LOCK() pthread_mutex_lock(&mpiio_runtime_mutex)
#define MPIIO_UNLOCK() pthread_mutex_unlock(&mpiio_runtime_mutex)

100 101 102 103 104 105 106 107 108 109 110 111 112
#define MPIIO_PRE_RECORD() do { \
    MPIIO_LOCK(); \
    if(!mpiio_runtime && !instrumentation_disabled) mpiio_runtime_initialize(); \
    if(!mpiio_runtime) { \
        MPIIO_UNLOCK(); \
        return(ret); \
    } \
} while(0)

#define MPIIO_POST_RECORD() do { \
    MPIIO_UNLOCK(); \
} while(0)

113
#define MPIIO_RECORD_READ(__ret, __fh, __count, __datatype, __counter, __tm1, __tm2) do { \
114
    struct mpiio_file_record_ref *rec_ref; \
115
    int size = 0; \
Shane Snyder's avatar
Shane Snyder committed
116
    double __elapsed = __tm2-__tm1; \
117
    if(__ret != MPI_SUCCESS) break; \
118 119
    rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash, &(__fh), sizeof(MPI_File)); \
    if(!rec_ref) break; \
120 121
    DARSHAN_MPI_CALL(PMPI_Type_size)(__datatype, &size);  \
    size = size * __count; \
122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
    DARSHAN_BUCKET_INC(&(rec_ref->file_rec->counters[MPIIO_SIZE_READ_AGG_0_100]), size); \
    darshan_common_val_counter(&rec_ref->access_root, &rec_ref->access_count, size, \
        &(rec_ref->file_rec->counters[MPIIO_ACCESS1_ACCESS]), \
        &(rec_ref->file_rec->counters[MPIIO_ACCESS1_COUNT])); \
    rec_ref->file_rec->counters[MPIIO_BYTES_READ] += size; \
    rec_ref->file_rec->counters[__counter] += 1; \
    if(rec_ref->last_io_type == DARSHAN_IO_WRITE) \
        rec_ref->file_rec->counters[MPIIO_RW_SWITCHES] += 1; \
    rec_ref->last_io_type = DARSHAN_IO_READ; \
    if(rec_ref->file_rec->fcounters[MPIIO_F_READ_START_TIMESTAMP] == 0) \
        rec_ref->file_rec->fcounters[MPIIO_F_READ_START_TIMESTAMP] = __tm1; \
    rec_ref->file_rec->fcounters[MPIIO_F_READ_END_TIMESTAMP] = __tm2; \
    if(rec_ref->file_rec->fcounters[MPIIO_F_MAX_READ_TIME] < __elapsed) { \
        rec_ref->file_rec->fcounters[MPIIO_F_MAX_READ_TIME] = __elapsed; \
        rec_ref->file_rec->counters[MPIIO_MAX_READ_TIME_SIZE] = size; } \
    DARSHAN_TIMER_INC_NO_OVERLAP(rec_ref->file_rec->fcounters[MPIIO_F_READ_TIME], \
        __tm1, __tm2, rec_ref->last_read_end); \
139
} while(0)
140

141
#define MPIIO_RECORD_WRITE(__ret, __fh, __count, __datatype, __counter, __tm1, __tm2) do { \
142
    struct mpiio_file_record_ref *rec_ref; \
143
    int size = 0; \
Shane Snyder's avatar
Shane Snyder committed
144 145
    double __elapsed = __tm2-__tm1; \
    if(__ret != MPI_SUCCESS) break; \
146 147
    rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash, &(__fh), sizeof(MPI_File)); \
    if(!rec_ref) break; \
148 149
    DARSHAN_MPI_CALL(PMPI_Type_size)(__datatype, &size);  \
    size = size * __count; \
150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
    DARSHAN_BUCKET_INC(&(rec_ref->file_rec->counters[MPIIO_SIZE_WRITE_AGG_0_100]), size); \
    darshan_common_val_counter(&rec_ref->access_root, &rec_ref->access_count, size, \
        &(rec_ref->file_rec->counters[MPIIO_ACCESS1_ACCESS]), \
        &(rec_ref->file_rec->counters[MPIIO_ACCESS1_COUNT])); \
    rec_ref->file_rec->counters[MPIIO_BYTES_WRITTEN] += size; \
    rec_ref->file_rec->counters[__counter] += 1; \
    if(rec_ref->last_io_type == DARSHAN_IO_READ) \
        rec_ref->file_rec->counters[MPIIO_RW_SWITCHES] += 1; \
    rec_ref->last_io_type = DARSHAN_IO_WRITE; \
    if(rec_ref->file_rec->fcounters[MPIIO_F_WRITE_START_TIMESTAMP] == 0) \
        rec_ref->file_rec->fcounters[MPIIO_F_WRITE_START_TIMESTAMP] = __tm1; \
    rec_ref->file_rec->fcounters[MPIIO_F_WRITE_END_TIMESTAMP] = __tm2; \
    if(rec_ref->file_rec->fcounters[MPIIO_F_MAX_WRITE_TIME] < __elapsed) { \
        rec_ref->file_rec->fcounters[MPIIO_F_MAX_WRITE_TIME] = __elapsed; \
        rec_ref->file_rec->counters[MPIIO_MAX_WRITE_TIME_SIZE] = size; } \
    DARSHAN_TIMER_INC_NO_OVERLAP(rec_ref->file_rec->fcounters[MPIIO_F_WRITE_TIME], \
        __tm1, __tm2, rec_ref->last_write_end); \
167 168
} while(0)

169 170 171
/**********************************************************
 *        Wrappers for MPI-IO functions of interest       * 
 **********************************************************/
Philip Carns's avatar
Philip Carns committed
172

Philip Carns's avatar
Philip Carns committed
173 174 175 176 177 178 179 180 181
#ifdef HAVE_MPIIO_CONST
int MPI_File_open(MPI_Comm comm, const char *filename, int amode, MPI_Info info, MPI_File *fh) 
#else
int MPI_File_open(MPI_Comm comm, char *filename, int amode, MPI_Info info, MPI_File *fh) 
#endif
{
    int ret;
    char* tmp;
    int comm_size;
182 183 184
    darshan_record_id rec_id;
    struct mpiio_file_record_ref *rec_ref;
    char *newpath;
Philip Carns's avatar
Philip Carns committed
185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_open)(comm, filename, amode, info, fh);
    tm2 = darshan_core_wtime();

    if(ret == MPI_SUCCESS)
    {
        /* use ROMIO approach to strip prefix if present */
        /* strip off prefix if there is one, but only skip prefixes
         * if they are greater than length one to allow for windows
         * drive specifications (e.g. c:\...) 
         */
        tmp = strchr(filename, ':');
        if (tmp > filename + 1) {
            filename = tmp + 1;
        }

203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
        MPIIO_PRE_RECORD();
        /* cleanup pathname and check whether we should ignore it */
        newpath = darshan_clean_file_path(filename);
        if(!newpath) newpath = (char *)filename;
        if(darshan_core_excluded_path(newpath))
        {
            if(newpath != filename) free(newpath);
            return(ret);
        }

        /* lookup the corresponding record, and create a new one if one
         * does not exist
         */
        rec_id = darshan_core_gen_record_id(newpath);
        rec_ref = darshan_lookup_record_ref(mpiio_runtime->rec_id_hash, &rec_id,
            sizeof(darshan_record_id));
        if(!rec_ref) rec_ref = mpiio_track_new_file_record(rec_id, newpath);

        if(rec_ref)
Philip Carns's avatar
Philip Carns committed
222
        {
223
            rec_ref->file_rec->counters[MPIIO_MODE] = amode;
Philip Carns's avatar
Philip Carns committed
224 225 226
            DARSHAN_MPI_CALL(PMPI_Comm_size)(comm, &comm_size);
            if(comm_size == 1)
            {
227
                rec_ref->file_rec->counters[MPIIO_INDEP_OPENS] += 1;
Philip Carns's avatar
Philip Carns committed
228 229 230
            }
            else
            {
231
                rec_ref->file_rec->counters[MPIIO_COLL_OPENS] += 1;
Philip Carns's avatar
Philip Carns committed
232 233 234
            }
            if(info != MPI_INFO_NULL)
            {
235
                rec_ref->file_rec->counters[MPIIO_HINTS] += 1;
Philip Carns's avatar
Philip Carns committed
236
            }
237 238
            if(rec_ref->file_rec->fcounters[MPIIO_F_OPEN_TIMESTAMP] == 0)
                rec_ref->file_rec->fcounters[MPIIO_F_OPEN_TIMESTAMP] = tm1;
239
            DARSHAN_TIMER_INC_NO_OVERLAP(
240 241 242 243 244 245
                rec_ref->file_rec->fcounters[MPIIO_F_META_TIME],
                tm1, tm2, rec_ref->last_meta_end);

            /* add a new record reference based on the MPI file handle */
            darshan_add_record_ref(&(mpiio_runtime->fh_hash), fh,
                sizeof(MPI_File), rec_ref);
Philip Carns's avatar
Philip Carns committed
246 247
        }

248 249
        if(newpath != filename) free(newpath);
        MPIIO_POST_RECORD();
Philip Carns's avatar
Philip Carns committed
250 251 252 253 254
    }

    return(ret);
}

255 256 257 258 259 260 261 262 263 264
int MPI_File_read(MPI_File fh, void *buf, int count,
    MPI_Datatype datatype, MPI_Status *status)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read)(fh, buf, count, datatype, status);
    tm2 = darshan_core_wtime();

265
    MPIIO_PRE_RECORD();
266
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_INDEP_READS, tm1, tm2);
267 268
    MPIIO_POST_RECORD();

269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write(MPI_File fh, const void *buf, int count,
    MPI_Datatype datatype, MPI_Status *status)
#else
int MPI_File_write(MPI_File fh, void *buf, int count,
    MPI_Datatype datatype, MPI_Status *status)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write)(fh, buf, count, datatype, status);
    tm2 = darshan_core_wtime();

287
    MPIIO_PRE_RECORD();
288
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_INDEP_WRITES, tm1, tm2);
289 290
    MPIIO_POST_RECORD();

291 292 293 294 295 296 297 298 299 300 301 302 303 304
    return(ret);
}

int MPI_File_read_at(MPI_File fh, MPI_Offset offset, void *buf,
    int count, MPI_Datatype datatype, MPI_Status *status)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_at)(fh, offset, buf,
        count, datatype, status);
    tm2 = darshan_core_wtime();

305
    MPIIO_PRE_RECORD();
306
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_INDEP_READS, tm1, tm2);
307 308
    MPIIO_POST_RECORD();

309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_at(MPI_File fh, MPI_Offset offset, const void *buf,
    int count, MPI_Datatype datatype, MPI_Status *status)
#else
int MPI_File_write_at(MPI_File fh, MPI_Offset offset, void *buf,
    int count, MPI_Datatype datatype, MPI_Status *status)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_at)(fh, offset, buf,
        count, datatype, status);
    tm2 = darshan_core_wtime();

328
    MPIIO_PRE_RECORD();
329
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_INDEP_WRITES, tm1, tm2);
330 331
    MPIIO_POST_RECORD();

332 333 334 335 336 337 338 339 340 341 342 343 344
    return(ret);
}

int MPI_File_read_all(MPI_File fh, void * buf, int count, MPI_Datatype datatype, MPI_Status *status)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_all)(fh, buf, count,
        datatype, status);
    tm2 = darshan_core_wtime();

345
    MPIIO_PRE_RECORD();
346
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_COLL_READS, tm1, tm2);
347 348
    MPIIO_POST_RECORD();

349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_all(MPI_File fh, const void * buf, int count, MPI_Datatype datatype, MPI_Status *status)
#else
int MPI_File_write_all(MPI_File fh, void * buf, int count, MPI_Datatype datatype, MPI_Status *status)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_all)(fh, buf, count,
        datatype, status);
    tm2 = darshan_core_wtime();

366
    MPIIO_PRE_RECORD();
367
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_COLL_WRITES, tm1, tm2);
368 369
    MPIIO_POST_RECORD();

370 371 372 373 374 375 376 377 378 379 380 381 382 383
    return(ret);
}

int MPI_File_read_at_all(MPI_File fh, MPI_Offset offset, void * buf,
    int count, MPI_Datatype datatype, MPI_Status * status)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_at_all)(fh, offset, buf,
        count, datatype, status);
    tm2 = darshan_core_wtime();

384
    MPIIO_PRE_RECORD();
385
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_COLL_READS, tm1, tm2);
386 387
    MPIIO_POST_RECORD();

388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_at_all(MPI_File fh, MPI_Offset offset, const void * buf,
    int count, MPI_Datatype datatype, MPI_Status * status)
#else
int MPI_File_write_at_all(MPI_File fh, MPI_Offset offset, void * buf,
    int count, MPI_Datatype datatype, MPI_Status * status)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_at_all)(fh, offset, buf,
        count, datatype, status);
    tm2 = darshan_core_wtime();

407
    MPIIO_PRE_RECORD();
408
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_COLL_WRITES, tm1, tm2);
409 410
    MPIIO_POST_RECORD();

411 412 413
    return(ret);
}

414 415 416 417 418 419 420 421 422 423
int MPI_File_read_shared(MPI_File fh, void * buf, int count, MPI_Datatype datatype, MPI_Status *status)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_shared)(fh, buf, count,
        datatype, status);
    tm2 = darshan_core_wtime();

424
    MPIIO_PRE_RECORD();
425
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_INDEP_READS, tm1, tm2);
426 427
    MPIIO_POST_RECORD();

428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_shared(MPI_File fh, const void * buf, int count, MPI_Datatype datatype, MPI_Status *status)
#else
int MPI_File_write_shared(MPI_File fh, void * buf, int count, MPI_Datatype datatype, MPI_Status *status)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_shared)(fh, buf, count,
        datatype, status);
    tm2 = darshan_core_wtime();

445
    MPIIO_PRE_RECORD();
446
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_INDEP_WRITES, tm1, tm2);
447 448
    MPIIO_POST_RECORD();

449 450 451 452 453 454 455 456 457 458 459 460 461 462
    return(ret);
}

int MPI_File_read_ordered(MPI_File fh, void * buf, int count,
    MPI_Datatype datatype, MPI_Status * status)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_ordered)(fh, buf, count,
        datatype, status);
    tm2 = darshan_core_wtime();

463
    MPIIO_PRE_RECORD();
464
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_COLL_READS, tm1, tm2);
465 466
    MPIIO_POST_RECORD();

467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_ordered(MPI_File fh, const void * buf, int count,
    MPI_Datatype datatype, MPI_Status * status)
#else
int MPI_File_write_ordered(MPI_File fh, void * buf, int count,
    MPI_Datatype datatype, MPI_Status * status)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_ordered)(fh, buf, count,
         datatype, status);
    tm2 = darshan_core_wtime();

486
    MPIIO_PRE_RECORD();
487
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_COLL_WRITES, tm1, tm2);
488 489
    MPIIO_POST_RECORD();

490 491 492 493 494 495 496 497 498 499 500 501
    return(ret);
}

int MPI_File_read_all_begin(MPI_File fh, void * buf, int count, MPI_Datatype datatype)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_all_begin)(fh, buf, count, datatype);
    tm2 = darshan_core_wtime();

502
    MPIIO_PRE_RECORD();
503
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_SPLIT_READS, tm1, tm2);
504 505
    MPIIO_POST_RECORD();

506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_all_begin(MPI_File fh, const void * buf, int count, MPI_Datatype datatype)
#else
int MPI_File_write_all_begin(MPI_File fh, void * buf, int count, MPI_Datatype datatype)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_all_begin)(fh, buf, count, datatype);
    tm2 = darshan_core_wtime();

522
    MPIIO_PRE_RECORD();
523
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_SPLIT_WRITES, tm1, tm2);
524 525
    MPIIO_POST_RECORD();

526 527 528 529 530 531 532 533 534 535 536 537 538 539
    return(ret);
}

int MPI_File_read_at_all_begin(MPI_File fh, MPI_Offset offset, void * buf,
    int count, MPI_Datatype datatype)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_at_all_begin)(fh, offset, buf,
        count, datatype);
    tm2 = darshan_core_wtime();
    
540
    MPIIO_PRE_RECORD();
541
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_SPLIT_READS, tm1, tm2);
542 543
    MPIIO_POST_RECORD();

544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_at_all_begin(MPI_File fh, MPI_Offset offset, const void * buf,
    int count, MPI_Datatype datatype)
#else
int MPI_File_write_at_all_begin(MPI_File fh, MPI_Offset offset, void * buf,
    int count, MPI_Datatype datatype)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_at_all_begin)(fh, offset,
        buf, count, datatype);
    tm2 = darshan_core_wtime();

563
    MPIIO_PRE_RECORD();
564
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_SPLIT_WRITES, tm1, tm2);
565 566
    MPIIO_POST_RECORD();

567 568 569 570 571 572 573 574 575 576 577 578 579
    return(ret);
}

int MPI_File_read_ordered_begin(MPI_File fh, void * buf, int count, MPI_Datatype datatype)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_read_ordered_begin)(fh, buf, count,
        datatype);
    tm2 = darshan_core_wtime();

580
    MPIIO_PRE_RECORD();
581
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_SPLIT_READS, tm1, tm2);
582 583
    MPIIO_POST_RECORD();

584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_write_ordered_begin(MPI_File fh, const void * buf, int count, MPI_Datatype datatype)
#else
int MPI_File_write_ordered_begin(MPI_File fh, void * buf, int count, MPI_Datatype datatype)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_write_ordered_begin)(fh, buf, count,
        datatype);
    tm2 = darshan_core_wtime();

601
    MPIIO_PRE_RECORD();
602
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_SPLIT_WRITES, tm1, tm2);
603 604
    MPIIO_POST_RECORD();

605 606 607 608 609 610 611 612 613 614 615 616
    return(ret);
}

int MPI_File_iread(MPI_File fh, void * buf, int count, MPI_Datatype datatype, __D_MPI_REQUEST * request)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_iread)(fh, buf, count, datatype, request);
    tm2 = darshan_core_wtime();

617
    MPIIO_PRE_RECORD();
618
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_NB_READS, tm1, tm2);
619 620
    MPIIO_POST_RECORD();

621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_iwrite(MPI_File fh, const void * buf, int count,
    MPI_Datatype datatype, __D_MPI_REQUEST * request)
#else
int MPI_File_iwrite(MPI_File fh, void * buf, int count,
    MPI_Datatype datatype, __D_MPI_REQUEST * request)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_iwrite)(fh, buf, count, datatype, request);
    tm2 = darshan_core_wtime();

639
    MPIIO_PRE_RECORD();
640
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_NB_WRITES, tm1, tm2);
641 642
    MPIIO_POST_RECORD();

643 644 645 646 647 648 649 650 651 652 653 654 655 656
    return(ret);
}

int MPI_File_iread_at(MPI_File fh, MPI_Offset offset, void * buf,
    int count, MPI_Datatype datatype, __D_MPI_REQUEST *request)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_iread_at)(fh, offset, buf, count,
        datatype, request);
    tm2 = darshan_core_wtime();

657
    MPIIO_PRE_RECORD();
658
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_NB_READS, tm1, tm2);
659 660
    MPIIO_POST_RECORD();

661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_iwrite_at(MPI_File fh, MPI_Offset offset, const void * buf,
    int count, MPI_Datatype datatype, __D_MPI_REQUEST *request)
#else
int MPI_File_iwrite_at(MPI_File fh, MPI_Offset offset, void * buf,
    int count, MPI_Datatype datatype, __D_MPI_REQUEST *request)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_iwrite_at)(fh, offset, buf,
        count, datatype, request);
    tm2 = darshan_core_wtime();

680
    MPIIO_PRE_RECORD();
681
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_NB_WRITES, tm1, tm2);
682 683
    MPIIO_POST_RECORD();

684 685 686 687 688 689 690 691 692 693 694 695 696 697
    return(ret);
}

int MPI_File_iread_shared(MPI_File fh, void * buf, int count,
    MPI_Datatype datatype, __D_MPI_REQUEST * request)
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_iread_shared)(fh, buf, count,
        datatype, request);
    tm2 = darshan_core_wtime();

698
    MPIIO_PRE_RECORD();
699
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_NB_READS, tm1, tm2);
700 701
    MPIIO_POST_RECORD();

702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720
    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_iwrite_shared(MPI_File fh, const void * buf, int count,
    MPI_Datatype datatype, __D_MPI_REQUEST * request)
#else
int MPI_File_iwrite_shared(MPI_File fh, void * buf, int count,
    MPI_Datatype datatype, __D_MPI_REQUEST * request)
#endif
{
    int ret;
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_iwrite_shared)(fh, buf, count,
        datatype, request);
    tm2 = darshan_core_wtime();

721
    MPIIO_PRE_RECORD();
722
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_NB_WRITES, tm1, tm2);
723 724
    MPIIO_POST_RECORD();

725 726
    return(ret);
}
727 728 729 730

int MPI_File_sync(MPI_File fh)
{
    int ret;
731
    struct mpiio_file_record_ref *rec_ref;
732 733 734 735 736 737 738 739
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_sync)(fh);
    tm2 = darshan_core_wtime();

    if(ret == MPI_SUCCESS)
    {
740 741 742 743
        MPIIO_PRE_RECORD();
        rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash,
            &fh, sizeof(MPI_File));
        if(rec_ref)
744
        {
745
            rec_ref->file_rec->counters[MPIIO_SYNCS] += 1;
746
            DARSHAN_TIMER_INC_NO_OVERLAP(
747 748
                rec_ref->file_rec->fcounters[MPIIO_F_WRITE_TIME],
                tm1, tm2, rec_ref->last_write_end);
749
        }
750
        MPIIO_POST_RECORD();
751 752 753 754 755 756 757 758 759 760 761 762 763 764
    }

    return(ret);
}

#ifdef HAVE_MPIIO_CONST
int MPI_File_set_view(MPI_File fh, MPI_Offset disp, MPI_Datatype etype,
    MPI_Datatype filetype, const char *datarep, MPI_Info info)
#else
int MPI_File_set_view(MPI_File fh, MPI_Offset disp, MPI_Datatype etype,
    MPI_Datatype filetype, char *datarep, MPI_Info info)
#endif
{
    int ret;
765
    struct mpiio_file_record_ref *rec_ref;
766 767 768 769 770 771 772 773 774
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_set_view)(fh, disp, etype, filetype,
        datarep, info);
    tm2 = darshan_core_wtime();

    if(ret == MPI_SUCCESS)
    {
775 776 777 778
        MPIIO_PRE_RECORD();
        rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash,
            &fh, sizeof(MPI_File));
        if(rec_ref)
779
        {
780
            rec_ref->file_rec->counters[MPIIO_VIEWS] += 1;
781 782
            if(info != MPI_INFO_NULL)
            {
783
                rec_ref->file_rec->counters[MPIIO_HINTS] += 1;
784
                DARSHAN_TIMER_INC_NO_OVERLAP(
785 786
                    rec_ref->file_rec->fcounters[MPIIO_F_META_TIME],
                    tm1, tm2, rec_ref->last_meta_end);
787 788
           }
        }
789
        MPIIO_POST_RECORD();
790 791 792 793 794
    }

    return(ret);
}

795 796 797
int MPI_File_close(MPI_File *fh)
{
    int ret;
798
    struct mpiio_file_record_ref *rec_ref;
799
    MPI_File tmp_fh = *fh;
800 801 802 803 804 805
    double tm1, tm2;

    tm1 = darshan_core_wtime();
    ret = DARSHAN_MPI_CALL(PMPI_File_close)(fh);
    tm2 = darshan_core_wtime();

806 807 808 809
    MPIIO_PRE_RECORD();
    rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash,
        &tmp_fh, sizeof(MPI_File));
    if(rec_ref)
810
    {
811
        rec_ref->file_rec->fcounters[MPIIO_F_CLOSE_TIMESTAMP] =
812 813
            darshan_core_wtime();
        DARSHAN_TIMER_INC_NO_OVERLAP(
814 815 816 817
            rec_ref->file_rec->fcounters[MPIIO_F_META_TIME],
            tm1, tm2, rec_ref->last_meta_end);
        darshan_delete_record_ref(&(mpiio_runtime->fh_hash),
            &tmp_fh, sizeof(MPI_File));
818
    }
819
    MPIIO_POST_RECORD();
820 821 822 823 824 825 826 827 828

    return(ret);
}

/***********************************************************
 * Internal functions for manipulating MPI-IO module state *
 ***********************************************************/

/* initialize data structures and register with darshan-core component */
Philip Carns's avatar
Philip Carns committed
829 830
static void mpiio_runtime_initialize()
{
831
    int mpiio_buf_size;
Philip Carns's avatar
Philip Carns committed
832

833 834 835
    /* try and store the default number of records for this module */
    mpiio_buf_size = DARSHAN_DEF_MOD_REC_COUNT * sizeof(struct darshan_mpiio_file);

Philip Carns's avatar
Philip Carns committed
836 837 838
    /* register the mpiio module with darshan core */
    darshan_core_register_module(
        DARSHAN_MPIIO_MOD,
839
        &mpiio_shutdown,
840
        &mpiio_buf_size,
841
        &my_rank,
842
        NULL);
Philip Carns's avatar
Philip Carns committed
843

844 845
    /* return if darshan-core does not provide enough module memory */
    if(mpiio_buf_size < sizeof(struct darshan_mpiio_file))
846 847
    {
        darshan_core_unregister_module(DARSHAN_MPIIO_MOD);
Philip Carns's avatar
Philip Carns committed
848
        return;
849
    }
Philip Carns's avatar
Philip Carns committed
850 851 852

    mpiio_runtime = malloc(sizeof(*mpiio_runtime));
    if(!mpiio_runtime)
853 854
    {
        darshan_core_unregister_module(DARSHAN_MPIIO_MOD);
Philip Carns's avatar
Philip Carns committed
855
        return;
856
    }
Philip Carns's avatar
Philip Carns committed
857 858 859 860 861
    memset(mpiio_runtime, 0, sizeof(*mpiio_runtime));

    return;
}

862 863
static struct mpiio_file_record_ref *mpiio_track_new_file_record(
    darshan_record_id rec_id, const char *path)
864
{
865 866
    struct darshan_mpiio_file *file_rec = NULL;
    struct mpiio_file_record_ref *rec_ref = NULL;
867
    int ret;
868

869 870
    rec_ref = malloc(sizeof(*rec_ref));
    if(!rec_ref)
871
        return(NULL);
872
    memset(rec_ref, 0, sizeof(*rec_ref));
873

874 875 876 877
    /* add a reference to this file record based on record id */
    ret = darshan_add_record_ref(&(mpiio_runtime->rec_id_hash), &rec_id,
        sizeof(darshan_record_id), rec_ref);
    if(ret == 0)
878
    {
879
        free(rec_ref);
880 881 882
        return(NULL);
    }

883 884
    /* register the actual file record with darshan-core so it is persisted
     * in the log file
885
     */
886 887 888 889 890 891
    file_rec = darshan_core_register_record(
        rec_id,
        path,
        DARSHAN_MPIIO_MOD,
        sizeof(struct darshan_mpiio_file),
        NULL);
892

893
    if(!file_rec)
894
    {
895 896 897 898
        darshan_delete_record_ref(&(mpiio_runtime->rec_id_hash),
            &rec_id, sizeof(darshan_record_id));
        free(rec_ref);
        return(NULL);
899 900
    }

901 902 903 904 905 906 907
    /* registering this file record was successful, so initialize some fields */
    file_rec->base_rec.id = rec_id;
    file_rec->base_rec.rank = my_rank;
    rec_ref->file_rec = file_rec;
    mpiio_runtime->file_rec_count++;

    return(rec_ref);
908 909
}

910
/* compare function for sorting file records by descending rank */
911
static int mpiio_record_compare(const void* a_p, const void* b_p)
Philip Carns's avatar
Philip Carns committed
912
{
913 914
    const struct darshan_mpiio_file* a = a_p;
    const struct darshan_mpiio_file* b = b_p;
Philip Carns's avatar
Philip Carns committed
915

916
    if(a->base_rec.rank < b->base_rec.rank)
917
        return 1;
918
    if(a->base_rec.rank > b->base_rec.rank)
919
        return -1;
Philip Carns's avatar
Philip Carns committed
920

921 922
    return 0;
}
Philip Carns's avatar
Philip Carns committed
923

924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944
static void mpiio_finalize_file_records(void *rec_ref_p)
{
    struct mpiio_file_record_ref *rec_ref =
        (struct mpiio_file_record_ref *)rec_ref_p;

#ifndef __DARSHAN_ENABLE_MMAP_LOGS
    /* walk common counters to get 4 most common -- only if mmap
     * feature is disabled (mmap updates counters on the go)
     */

    /* common accesses */
    darshan_walk_common_vals(rec_ref->access_root,
        &(rec_ref->file_rec->counters[MPIIO_ACCESS1_ACCESS]),
        &(rec_ref->file_rec->counters[MPIIO_ACCESS1_COUNT]));
#endif

    tdestroy(rec_ref->access_root, free);

    return;
}

945 946 947 948 949
static void mpiio_record_reduction_op(
    void* infile_v,
    void* inoutfile_v,
    int *len,
    MPI_Datatype *datatype)
Philip Carns's avatar
Philip Carns committed
950
{
951 952 953
    struct darshan_mpiio_file tmp_file;
    struct darshan_mpiio_file *infile = infile_v;
    struct darshan_mpiio_file *inoutfile = inoutfile_v;
954
    int i, j, k;
Philip Carns's avatar
Philip Carns committed
955

956 957 958
    for(i=0; i<*len; i++)
    {
        memset(&tmp_file, 0, sizeof(struct darshan_mpiio_file));
959 960
        tmp_file.base_rec.id = infile->base_rec.id;
        tmp_file.base_rec.rank = -1;
961 962

        /* sum */
963 964 965 966 967 968 969 970 971
        for(j=MPIIO_INDEP_OPENS; j<=MPIIO_VIEWS; j++)
        {
            tmp_file.counters[j] = infile->counters[j] + inoutfile->counters[j];
        }

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

        /* sum */
        for(j=MPIIO_BYTES_READ; j<=MPIIO_RW_SWITCHES; j++)
972 973 974 975
        {
            tmp_file.counters[j] = infile->counters[j] + inoutfile->counters[j];
        }

976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
        /* skip MPIIO_MAX_*_TIME_SIZE; handled in floating point section */

        for(j=MPIIO_SIZE_READ_AGG_0_100; j<=MPIIO_SIZE_WRITE_AGG_1G_PLUS; j++)
        {
            tmp_file.counters[j] = infile->counters[j] + inoutfile->counters[j];
        }

        /* first collapse any duplicates */
        for(j=MPIIO_ACCESS1_ACCESS; j<=MPIIO_ACCESS4_ACCESS; j++)
        {
            for(k=MPIIO_ACCESS1_ACCESS; k<=MPIIO_ACCESS4_ACCESS; k++)
            {
                if(infile->counters[j] == inoutfile->counters[k])
                {
                    infile->counters[j+4] += inoutfile->counters[k+4];
                    inoutfile->counters[k] = 0;
                    inoutfile->counters[k+4] = 0;
                }
            }
        }

        /* first set */
        for(j=MPIIO_ACCESS1_ACCESS; j<=MPIIO_ACCESS4_ACCESS; j++)
        {
            DARSHAN_COMMON_VAL_COUNTER_INC(&(tmp_file.counters[MPIIO_ACCESS1_ACCESS]),
                &(tmp_file.counters[MPIIO_ACCESS1_COUNT]), infile->counters[j],
1002
                infile->counters[j+4], 0);
1003 1004 1005 1006
        }

        /* second set */
        for(j=MPIIO_ACCESS1_ACCESS; j<=MPIIO_ACCESS4_ACCESS; j++)
1007
        {
1008 1009
            DARSHAN_COMMON_VAL_COUNTER_INC(&(tmp_file.counters[MPIIO_ACCESS1_ACCESS]),
                &(tmp_file.counters[MPIIO_ACCESS1_COUNT]), inoutfile->counters[j],
1010
                inoutfile->counters[j+4], 0);
1011 1012 1013
        }

        /* min non-zero (if available) value */
1014
        for(j=MPIIO_F_OPEN_TIMESTAMP; j<=MPIIO_F_WRITE_START_TIMESTAMP; j++)
1015 1016 1017 1018 1019 1020 1021
        {
            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];
        }

1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
        /* max */
        for(j=MPIIO_F_READ_END_TIMESTAMP; j<= MPIIO_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=MPIIO_F_READ_TIME; j<=MPIIO_F_META_TIME; j++)
        {
Shane Snyder's avatar
Shane Snyder committed
1034
            tmp_file.fcounters[j] = infile->fcounters[j] + inoutfile->fcounters[j];
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069
        }

        /* max (special case) */
        if(infile->fcounters[MPIIO_F_MAX_READ_TIME] >
            inoutfile->fcounters[MPIIO_F_MAX_READ_TIME])
        {
            tmp_file.fcounters[MPIIO_F_MAX_READ_TIME] =
                infile->fcounters[MPIIO_F_MAX_READ_TIME];
            tmp_file.counters[MPIIO_MAX_READ_TIME_SIZE] =
                infile->counters[MPIIO_MAX_READ_TIME_SIZE];
        }
        else
        {
            tmp_file.fcounters[MPIIO_F_MAX_READ_TIME] =
                inoutfile->fcounters[MPIIO_F_MAX_READ_TIME];
            tmp_file.counters[MPIIO_MAX_READ_TIME_SIZE] =
                inoutfile->counters[MPIIO_MAX_READ_TIME_SIZE];
        }

        if(infile->fcounters[MPIIO_F_MAX_WRITE_TIME] >
            inoutfile->fcounters[MPIIO_F_MAX_WRITE_TIME])
        {
            tmp_file.fcounters[MPIIO_F_MAX_WRITE_TIME] =
                infile->fcounters[MPIIO_F_MAX_WRITE_TIME];
            tmp_file.counters[MPIIO_MAX_WRITE_TIME_SIZE] =
                infile->counters[MPIIO_MAX_WRITE_TIME_SIZE];
        }
        else
        {
            tmp_file.fcounters[MPIIO_F_MAX_WRITE_TIME] =
                inoutfile->fcounters[MPIIO_F_MAX_WRITE_TIME];
            tmp_file.counters[MPIIO_MAX_WRITE_TIME_SIZE] =
                inoutfile->counters[MPIIO_MAX_WRITE_TIME_SIZE];
        }

1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
        /* min (zeroes are ok here; some procs don't do I/O) */
        if(infile->fcounters[MPIIO_F_FASTEST_RANK_TIME] <
            inoutfile->fcounters[MPIIO_F_FASTEST_RANK_TIME])
        {
            tmp_file.counters[MPIIO_FASTEST_RANK] =
                infile->counters[MPIIO_FASTEST_RANK];
            tmp_file.counters[MPIIO_FASTEST_RANK_BYTES] =
                infile->counters[MPIIO_FASTEST_RANK_BYTES];
            tmp_file.fcounters[MPIIO_F_FASTEST_RANK_TIME] =
                infile->fcounters[MPIIO_F_FASTEST_RANK_TIME];
        }
        else
        {
            tmp_file.counters[MPIIO_FASTEST_RANK] =
                inoutfile->counters[MPIIO_FASTEST_RANK];
            tmp_file.counters[MPIIO_FASTEST_RANK_BYTES] =
                inoutfile->counters[MPIIO_FASTEST_RANK_BYTES];
            tmp_file.fcounters[MPIIO_F_FASTEST_RANK_TIME] =
                inoutfile->fcounters[MPIIO_F_FASTEST_RANK_TIME];
        }

        /* max */
        if(infile->fcounters[MPIIO_F_SLOWEST_RANK_TIME] >
           inoutfile->fcounters[MPIIO_F_SLOWEST_RANK_TIME])
        {
            tmp_file.counters[MPIIO_SLOWEST_RANK] =
                infile->counters[MPIIO_SLOWEST_RANK];
            tmp_file.counters[MPIIO_SLOWEST_RANK_BYTES] =
                infile->counters[MPIIO_SLOWEST_RANK_BYTES];
            tmp_file.fcounters[MPIIO_F_SLOWEST_RANK_TIME] =
                infile->fcounters[MPIIO_F_SLOWEST_RANK_TIME];
        }
        else
        {
            tmp_file.counters[MPIIO_SLOWEST_RANK] =
                inoutfile->counters[MPIIO_SLOWEST_RANK];
            tmp_file.counters[MPIIO_SLOWEST_RANK_BYTES] =
                inoutfile->counters[MPIIO_SLOWEST_RANK_BYTES];
            tmp_file.fcounters[MPIIO_F_SLOWEST_RANK_TIME] =
                inoutfile->fcounters[MPIIO_F_SLOWEST_RANK_TIME];
        }

1112 1113 1114 1115 1116 1117 1118 1119 1120
        /* update pointers */
        *inoutfile = tmp_file;
        inoutfile++;
        infile++;
    }

    return;
}

1121 1122 1123 1124 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 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
static void mpiio_shared_record_variance(MPI_Comm mod_comm,
    struct darshan_mpiio_file *inrec_array, struct darshan_mpiio_file *outrec_array,
    int shared_rec_count)
{
    MPI_Datatype var_dt;
    MPI_Op var_op;
    int i;
    struct darshan_variance_dt *var_send_buf = NULL;
    struct darshan_variance_dt *var_recv_buf = NULL;

    DARSHAN_MPI_CALL(PMPI_Type_contiguous)(sizeof(struct darshan_variance_dt),
        MPI_BYTE, &var_dt);
    DARSHAN_MPI_CALL(PMPI_Type_commit)(&var_dt);

    DARSHAN_MPI_CALL(PMPI_Op_create)(darshan_variance_reduce, 1, &var_op);

    var_send_buf = malloc(shared_rec_count * sizeof(struct darshan_variance_dt));
    if(!var_send_buf)
        return;

    if(my_rank == 0)
    {
        var_recv_buf = malloc(shared_rec_count * sizeof(struct darshan_variance_dt));

        if(!var_recv_buf)
            return;
    }

    /* get total i/o time variances for shared records */

    for(i=0; i<shared_rec_count; i++)
    {
        var_send_buf[i].n = 1;
        var_send_buf[i].S = 0;
        var_send_buf[i].T = inrec_array[i].fcounters[MPIIO_F_READ_TIME] +
                            inrec_array[i].fcounters[MPIIO_F_WRITE_TIME] +
                            inrec_array[i].fcounters[MPIIO_F_META_TIME];
    }

    DARSHAN_MPI_CALL(PMPI_Reduce)(var_send_buf, var_recv_buf, shared_rec_count,
        var_dt, var_op, 0, mod_comm);

    if(my_rank == 0)
    {
        for(i=0; i<shared_rec_count; i++)
        {
            outrec_array[i].fcounters[MPIIO_F_VARIANCE_RANK_TIME] =
                (var_recv_buf[i].S / var_recv_buf[i].n);
        }
    }

    /* get total bytes moved variances for shared records */

    for(i=0; i<shared_rec_count; i++)
    {
        var_send_buf[i].n = 1;
        var_send_buf[i].S = 0;
        var_send_buf[i].T = (double)
                            inrec_array[i].counters[MPIIO_BYTES_READ] +
                            inrec_array[i].counters[MPIIO_BYTES_WRITTEN];
    }

    DARSHAN_MPI_CALL(PMPI_Reduce)(var_send_buf, var_recv_buf, shared_rec_count,
        var_dt, var_op, 0, mod_comm);

    if(my_rank == 0)
    {
        for(i=0; i<shared_rec_count; i++)
        {
            outrec_array[i].fcounters[MPIIO_F_VARIANCE_RANK_BYTES] =
                (var_recv_buf[i].S / var_recv_buf[i].n);
        }
    }

    DARSHAN_MPI_CALL(PMPI_Type_free)(&var_dt);
    DARSHAN_MPI_CALL(PMPI_Op_free)(&var_op);
    free(var_send_buf);
    free(var_recv_buf);

    return;
}

1203
static void mpiio_cleanup_runtime()
1204
{
1205 1206
    darshan_clear_record_refs(&(mpiio_runtime->fh_hash), 0);
    darshan_clear_record_refs(&(mpiio_runtime->rec_id_hash), 1);
1207

1208 1209
    free(mpiio_runtime);
    mpiio_runtime = NULL;
1210 1211 1212 1213

    return;
}

1214 1215 1216 1217 1218
/**************************************************************************
 * Functions exported by MPI-IO module for coordinating with darshan-core *
 **************************************************************************/

static void mpiio_shutdown(