darshan-mpi-io.c 70.3 KB
Newer Older
1 2 3 4 5
/*
 *  (C) 2009 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

6 7 8
#define _XOPEN_SOURCE 500
#define _GNU_SOURCE /* for tdestroy() */

9 10
#include "darshan-config.h"

11
#include <stdio.h>
12
#ifdef HAVE_MNTENT_H
13
#include <mntent.h>
14
#endif
15 16 17 18 19 20 21
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <limits.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/types.h>
22
#include <sys/stat.h>
23 24 25 26 27 28 29
#include <zlib.h>
#include <assert.h>
#include <search.h>

#include "mpi.h"
#include "darshan.h"

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
#ifdef DARSHAN_PRELOAD
#include <dlfcn.h>
#include <stdlib.h>

#define DARSHAN_MPI_CALL(func) __real_ ## func

#define DARSHAN_FORWARD_DECL(name,ret,args) \
  ret (*__real_ ## name)args = NULL;

#define MAP_OR_FAIL(func) \
    __real_ ## func = dlsym(RTLD_NEXT, #func); \
    if (!(__real_ ## func)) { \
        fprintf(stderr, "Darshan failed to map symbol: %s\n", #func); \
    }

DARSHAN_FORWARD_DECL(PMPI_File_close, int, (MPI_File *fh));
DARSHAN_FORWARD_DECL(PMPI_File_set_size, int, (MPI_File fh, MPI_Offset size));
DARSHAN_FORWARD_DECL(PMPI_File_iread_at, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Request *request));
DARSHAN_FORWARD_DECL(PMPI_File_iread, int, (MPI_File fh, void  *buf, int  count, MPI_Datatype  datatype, MPI_Request  *request));
DARSHAN_FORWARD_DECL(PMPI_File_iread_shared, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Request *request));
DARSHAN_FORWARD_DECL(PMPI_File_iwrite_at, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Request *request));
DARSHAN_FORWARD_DECL(PMPI_File_iwrite, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Request *request));
DARSHAN_FORWARD_DECL(PMPI_File_iwrite_shared, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Request *request));
DARSHAN_FORWARD_DECL(PMPI_File_open, int, (MPI_Comm comm, char *filename, int amode, MPI_Info info, MPI_File *fh));
DARSHAN_FORWARD_DECL(PMPI_File_read_all_begin, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype));
DARSHAN_FORWARD_DECL(PMPI_File_read_all, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_read_at_all, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_read_at_all_begin, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype));
DARSHAN_FORWARD_DECL(PMPI_File_read_at, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_read, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_read_ordered_begin, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype));
DARSHAN_FORWARD_DECL(PMPI_File_read_ordered, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_read_shared, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_set_view, int, (MPI_File fh, MPI_Offset disp, MPI_Datatype etype, MPI_Datatype filetype, char *datarep, MPI_Info info));
DARSHAN_FORWARD_DECL(PMPI_File_sync, int, (MPI_File fh));
DARSHAN_FORWARD_DECL(PMPI_File_write_all_begin, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype));
DARSHAN_FORWARD_DECL(PMPI_File_write_all, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_write_at_all_begin, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype));
DARSHAN_FORWARD_DECL(PMPI_File_write_at_all, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_write_at, int, (MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_write, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_write_ordered_begin, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype));
DARSHAN_FORWARD_DECL(PMPI_File_write_ordered, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_File_write_shared, int, (MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status));
DARSHAN_FORWARD_DECL(PMPI_Finalize, int, ());
DARSHAN_FORWARD_DECL(PMPI_Init, int, (int *argc, char ***argv));
DARSHAN_FORWARD_DECL(PMPI_Init_thread, int, (int *argc, char ***argv, int required, int *provided));

DARSHAN_FORWARD_DECL(PMPI_Wtime, double, ());
DARSHAN_FORWARD_DECL(PMPI_Allreduce, int, (void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm));
DARSHAN_FORWARD_DECL(PMPI_Bcast, int, (void *buffer, int count, MPI_Datatype datatype, int root, MPI_Comm comm));
DARSHAN_FORWARD_DECL(PMPI_Comm_rank, int, (MPI_Comm comm, int *rank));
DARSHAN_FORWARD_DECL(PMPI_Comm_size, int, (MPI_Comm comm, int *size));
DARSHAN_FORWARD_DECL(PMPI_Scan, int, (void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm));
DARSHAN_FORWARD_DECL(PMPI_Type_commit, int, (MPI_Datatype *datatype));
DARSHAN_FORWARD_DECL(PMPI_Type_contiguous, int, (int count, MPI_Datatype oldtype, MPI_Datatype *newtype));
DARSHAN_FORWARD_DECL(PMPI_Type_extent, int, (MPI_Datatype datatype, MPI_Aint *extent));
DARSHAN_FORWARD_DECL(PMPI_Type_free, int, (MPI_Datatype *datatype));
DARSHAN_FORWARD_DECL(PMPI_Type_hindexed, int, (int count, int *array_of_blocklengths, MPI_Aint *array_of_displacements, MPI_Datatype oldtype, MPI_Datatype *newtype));
DARSHAN_FORWARD_DECL(PMPI_Op_create, int, (MPI_User_function *function, int commute, MPI_Op *op));
90
DARSHAN_FORWARD_DECL(PMPI_Op_free, int, (MPI_Op *op));
91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149
DARSHAN_FORWARD_DECL(PMPI_Reduce, int, (void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm));
DARSHAN_FORWARD_DECL(PMPI_Type_get_envelope, int, (MPI_Datatype datatype, int *num_integers, int *num_addresses, int *num_datatypes, int *combiner));
DARSHAN_FORWARD_DECL(PMPI_Type_size, int, (MPI_Datatype datatype, int *size));

void resolve_mpi_symbols (void)
{
    /*
     * Overloaded functions
     */
    MAP_OR_FAIL(PMPI_File_close);
    MAP_OR_FAIL(PMPI_File_set_size);
    MAP_OR_FAIL(PMPI_File_iread_at);
    MAP_OR_FAIL(PMPI_File_iread);
    MAP_OR_FAIL(PMPI_File_iread_shared);
    MAP_OR_FAIL(PMPI_File_iwrite_at);
    MAP_OR_FAIL(PMPI_File_iwrite);
    MAP_OR_FAIL(PMPI_File_iwrite_shared);
    MAP_OR_FAIL(PMPI_File_open);
    MAP_OR_FAIL(PMPI_File_read_all_begin);
    MAP_OR_FAIL(PMPI_File_read_all);
    MAP_OR_FAIL(PMPI_File_read_at_all_begin);
    MAP_OR_FAIL(PMPI_File_read_at_all);
    MAP_OR_FAIL(PMPI_File_read_at);
    MAP_OR_FAIL(PMPI_File_read);
    MAP_OR_FAIL(PMPI_File_read_ordered_begin);
    MAP_OR_FAIL(PMPI_File_read_ordered);
    MAP_OR_FAIL(PMPI_File_read_shared);
    MAP_OR_FAIL(PMPI_File_set_view);
    MAP_OR_FAIL(PMPI_File_sync);
    MAP_OR_FAIL(PMPI_File_write_all_begin);
    MAP_OR_FAIL(PMPI_File_write_all);
    MAP_OR_FAIL(PMPI_File_write_at_all_begin);
    MAP_OR_FAIL(PMPI_File_write_at_all);
    MAP_OR_FAIL(PMPI_File_write_at);
    MAP_OR_FAIL(PMPI_File_write);
    MAP_OR_FAIL(PMPI_File_write_ordered_begin);
    MAP_OR_FAIL(PMPI_File_write_ordered);
    MAP_OR_FAIL(PMPI_File_write_shared);
    MAP_OR_FAIL(PMPI_Finalize);
    MAP_OR_FAIL(PMPI_Init);
    MAP_OR_FAIL(PMPI_Init_thread);

    /*
     * These function are not intercepted but are used
     * by darshan itself.
     */
    MAP_OR_FAIL(PMPI_Wtime);
    MAP_OR_FAIL(PMPI_Allreduce);
    MAP_OR_FAIL(PMPI_Bcast);
    MAP_OR_FAIL(PMPI_Comm_rank);
    MAP_OR_FAIL(PMPI_Comm_size);
    MAP_OR_FAIL(PMPI_Scan);
    MAP_OR_FAIL(PMPI_Type_commit);
    MAP_OR_FAIL(PMPI_Type_contiguous);
    MAP_OR_FAIL(PMPI_Type_extent);
    MAP_OR_FAIL(PMPI_Type_free);
    MAP_OR_FAIL(PMPI_Type_size);
    MAP_OR_FAIL(PMPI_Type_hindexed);
    MAP_OR_FAIL(PMPI_Op_create);
150
    MAP_OR_FAIL(PMPI_Op_free);
151 152 153 154 155 156 157 158 159 160 161 162
    MAP_OR_FAIL(PMPI_Reduce);
    MAP_OR_FAIL(PMPI_Type_get_envelope);

    return;
}

#else

#define DARSHAN_MPI_CALL(func) func

#endif

163 164 165 166 167 168 169
extern char* __progname;

/* maximum number of memory segments each process will write to the log */
#define CP_MAX_MEM_SEGMENTS 8

#define CP_DATATYPE_INC(__file, __datatype) do {\
    int num_integers, num_addresses, num_datatypes, combiner, ret; \
170 171
    ret = DARSHAN_MPI_CALL(PMPI_Type_get_envelope)(__datatype, &num_integers, \
        &num_addresses, &num_datatypes, &combiner); \
172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220
    if(ret == MPI_SUCCESS) { \
        switch(combiner) { \
            case MPI_COMBINER_NAMED:\
                CP_INC(__file,CP_COMBINER_NAMED,1); break; \
            case MPI_COMBINER_DUP:\
                CP_INC(__file,CP_COMBINER_DUP,1); break; \
            case MPI_COMBINER_CONTIGUOUS:\
                CP_INC(__file,CP_COMBINER_CONTIGUOUS,1); break; \
            case MPI_COMBINER_VECTOR:\
                CP_INC(__file,CP_COMBINER_VECTOR,1); break; \
            case MPI_COMBINER_HVECTOR_INTEGER:\
                CP_INC(__file,CP_COMBINER_HVECTOR_INTEGER,1); break; \
            case MPI_COMBINER_HVECTOR:\
                CP_INC(__file,CP_COMBINER_HVECTOR,1); break; \
            case MPI_COMBINER_INDEXED:\
                CP_INC(__file,CP_COMBINER_INDEXED,1); break; \
            case MPI_COMBINER_HINDEXED_INTEGER:\
                CP_INC(__file,CP_COMBINER_HINDEXED_INTEGER,1); break; \
            case MPI_COMBINER_HINDEXED:\
                CP_INC(__file,CP_COMBINER_HINDEXED,1); break; \
            case MPI_COMBINER_INDEXED_BLOCK:\
                CP_INC(__file,CP_COMBINER_INDEXED_BLOCK,1); break; \
            case MPI_COMBINER_STRUCT_INTEGER:\
                CP_INC(__file,CP_COMBINER_STRUCT_INTEGER,1); break; \
            case MPI_COMBINER_STRUCT:\
                CP_INC(__file,CP_COMBINER_STRUCT,1); break; \
            case MPI_COMBINER_SUBARRAY:\
                CP_INC(__file,CP_COMBINER_SUBARRAY,1); break; \
            case MPI_COMBINER_DARRAY:\
                CP_INC(__file,CP_COMBINER_DARRAY,1); break; \
            case MPI_COMBINER_F90_REAL:\
                CP_INC(__file,CP_COMBINER_F90_REAL,1); break; \
            case MPI_COMBINER_F90_COMPLEX:\
                CP_INC(__file,CP_COMBINER_F90_COMPLEX,1); break; \
            case MPI_COMBINER_F90_INTEGER:\
                CP_INC(__file,CP_COMBINER_F90_INTEGER,1); break; \
            case MPI_COMBINER_RESIZED:\
                CP_INC(__file,CP_COMBINER_RESIZED,1); break; \
        } \
    } \
} while(0)

#define CP_RECORD_MPI_WRITE(__ret, __fh, __count, __datatype, __counter, __tm1, __tm2) do { \
    struct darshan_file_runtime* file; \
    int size = 0; \
    MPI_Aint extent = 0; \
    if(__ret != MPI_SUCCESS) break; \
    file = darshan_file_by_fh(__fh); \
    if(!file) break; \
221
    DARSHAN_MPI_CALL(PMPI_Type_size)(__datatype, &size);  \
222
    size = size * __count; \
223
    DARSHAN_MPI_CALL(PMPI_Type_extent)(__datatype, &extent); \
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240
    CP_BUCKET_INC(file, CP_SIZE_WRITE_AGG_0_100, size); \
    CP_BUCKET_INC(file, CP_EXTENT_WRITE_0_100, extent); \
    CP_INC(file, __counter, 1); \
    CP_DATATYPE_INC(file, __datatype); \
    CP_F_INC(file, CP_F_MPI_WRITE_TIME, (__tm2-__tm1)); \
    if(CP_F_VALUE(file, CP_F_WRITE_START_TIMESTAMP) == 0) \
        CP_F_SET(file, CP_F_WRITE_START_TIMESTAMP, __tm1); \
    CP_F_SET(file, CP_F_WRITE_END_TIMESTAMP, __tm2); \
} while(0)

#define CP_RECORD_MPI_READ(__ret, __fh, __count, __datatype, __counter, __tm1, __tm2) do { \
    struct darshan_file_runtime* file; \
    int size = 0; \
    MPI_Aint extent = 0; \
    if(__ret != MPI_SUCCESS) break; \
    file = darshan_file_by_fh(__fh); \
    if(!file) break; \
241
    DARSHAN_MPI_CALL(PMPI_Type_size)(__datatype, &size);  \
242
    size = size * __count; \
243
    DARSHAN_MPI_CALL(PMPI_Type_extent)(__datatype, &extent); \
244 245 246 247 248 249 250 251 252 253 254
    CP_BUCKET_INC(file, CP_SIZE_READ_AGG_0_100, size); \
    CP_BUCKET_INC(file, CP_EXTENT_READ_0_100, extent); \
    CP_INC(file, __counter, 1); \
    CP_DATATYPE_INC(file, __datatype); \
    CP_F_INC(file, CP_F_MPI_READ_TIME, (__tm2-__tm1)); \
    if(CP_F_VALUE(file, CP_F_READ_START_TIMESTAMP) == 0) \
        CP_F_SET(file, CP_F_READ_START_TIMESTAMP, __tm1); \
    CP_F_SET(file, CP_F_READ_END_TIMESTAMP, __tm2); \
} while(0)

static struct darshan_file_runtime* darshan_file_by_fh(MPI_File fh);
255 256 257
static void cp_log_construct_indices(struct darshan_job_runtime* final_job,
    int rank, int* inout_count, int* lengths, void** pointers, char*
    trailing_data);
258
static int cp_log_write(struct darshan_job_runtime* final_job, int rank, 
259
    char* logfile_name, int count, int* lengths, void** pointers, double start_log_time);
260
static int cp_log_reduction(struct darshan_job_runtime* final_job, int rank, 
261
    char* logfile_name, MPI_Offset* next_offset);
262 263 264 265 266 267
static void darshan_file_reduce(void* infile_v, 
    void* inoutfile_v, int *len, 
    MPI_Datatype *datatype);
static int cp_log_compress(struct darshan_job_runtime* final_job,
    int rank, int* inout_count, int* lengths, void** pointers);
static int file_compare(const void* a, const void* b);
Philip Carns's avatar
Philip Carns committed
268
static void darshan_mpi_initialize(int *argc, char ***argv);
269
static char*  darshan_get_exe_and_mounts(struct darshan_job_runtime* final_job);
270 271 272 273 274 275 276
static int darshan_file_variance(
    struct darshan_file *infile_array,
    struct darshan_file *outfile_array,
    int count, int rank);
static void pairwise_variance_reduce (
    void *invec, void *inoutvec, int *len, MPI_Datatype *dt);

277

278 279 280 281 282
#define CP_MAX_MNTS 32
uint64_t mnt_hash_array[CP_MAX_MNTS] = {0};
int64_t mnt_id_array[CP_MAX_MNTS] = {0};
uint64_t mnt_hash_array_root[CP_MAX_MNTS] = {0};
int64_t mnt_id_array_root[CP_MAX_MNTS] = {0};
Philip Carns's avatar
Philip Carns committed
283 284 285 286 287
struct
{
    int64_t mnt_id_local;
    int64_t mnt_id_root;
} mnt_mapping[CP_MAX_MNTS];
288

289 290 291 292 293 294 295
struct variance_dt
{
    double n;
    double T;
    double S;
};

296 297 298 299
int MPI_Init(int *argc, char ***argv)
{
    int ret;

300 301 302 303 304
#ifdef DARSHAN_PRELOAD
    resolve_mpi_symbols();
#endif

    ret = DARSHAN_MPI_CALL(PMPI_Init)(argc, argv);
305 306 307 308 309
    if(ret != MPI_SUCCESS)
    {
        return(ret);
    }

310 311 312 313 314 315 316 317 318
    darshan_mpi_initialize(argc, argv);

    return(ret);
}

int MPI_Init_thread (int *argc, char ***argv, int required, int *provided)
{
    int ret;

319
    ret = DARSHAN_MPI_CALL(PMPI_Init_thread)(argc, argv, required, provided);
320 321 322 323 324 325 326 327 328 329
    if (ret != MPI_SUCCESS)
    {
        return(ret);
    }

    darshan_mpi_initialize(argc, argv);

    return(ret);
}

Philip Carns's avatar
Philip Carns committed
330
static void darshan_mpi_initialize(int *argc, char ***argv)
331 332 333 334
{
    int nprocs;
    int rank;

335 336
    DARSHAN_MPI_CALL(PMPI_Comm_size)(MPI_COMM_WORLD, &nprocs);
    DARSHAN_MPI_CALL(PMPI_Comm_rank)(MPI_COMM_WORLD, &rank);
337 338 339 340 341 342 343 344 345 346 347 348 349 350

    CP_LOCK();
    if(argc && argv)
    {
        darshan_initialize(*argc, *argv, nprocs, rank);
    }
    else
    {
        /* we don't see argc and argv here in fortran */
        darshan_initialize(0, NULL, nprocs, rank);
    }

    CP_UNLOCK();

351
    return;
352 353 354 355 356 357 358 359 360 361 362 363 364
}

void darshan_shutdown(int timing_flag)
{
    int rank;
    char* logfile_name;
    struct darshan_job_runtime* final_job;
    double start_log_time = 0;
    int flags;
    int all_ret = 0;
    int local_ret = 0;
    MPI_Offset next_offset = 0;
    char* jobid_str;
365 366
    char* envjobid;
    char* logpath;
367 368 369 370 371 372
    int jobid;
    int index_count = 0;
    int lengths[CP_MAX_MEM_SEGMENTS];
    void* pointers[CP_MAX_MEM_SEGMENTS];
    int ret;
    double red1=0, red2=0, gz1=0, gz2=0, write1=0, write2=0, tm_end=0;
373
    double bcst1=0, bcst2=0, bcst3=0;
374
    int nprocs;
375
    char* trailing_data = NULL;
Philip Carns's avatar
Philip Carns committed
376 377
    int i, j;
    int map_index = 0;
378
    time_t start_time_tmp = 0;
379 380
    uint64_t logmod;
    char hname[HOST_NAME_MAX];
381 382 383 384 385

    CP_LOCK();
    if(!darshan_global_job)
    {
        CP_UNLOCK();
386
        return;
387 388 389 390 391 392 393 394 395
    }
    /* disable further tracing while hanging onto the data so that we can
     * write it out
     */
    final_job = darshan_global_job;
    darshan_global_job = NULL;
    flags = final_job->flags;
    CP_UNLOCK();

396
    start_log_time = DARSHAN_MPI_CALL(PMPI_Wtime)();
397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442

    /* figure out which access sizes to log */
    darshan_walk_file_accesses(final_job);

    /* if the records have been condensed, then zero out fields that are no
     * longer valid for safety 
     */
    if(final_job->flags & CP_FLAG_CONDENSED && final_job->file_count)
    {
        CP_SET(&final_job->file_runtime_array[0], CP_MODE, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_CONSEC_READS, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_CONSEC_WRITES, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_SEQ_READS, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_SEQ_WRITES, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE1_STRIDE, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE2_STRIDE, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE3_STRIDE, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE4_STRIDE, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE1_COUNT, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE2_COUNT, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE3_COUNT, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_STRIDE4_COUNT, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS1_ACCESS, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS2_ACCESS, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS3_ACCESS, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS4_ACCESS, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS1_COUNT, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS2_COUNT, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS3_COUNT, 0);
        CP_SET(&final_job->file_runtime_array[0], CP_ACCESS4_COUNT, 0);
        
        CP_F_SET(&final_job->file_runtime_array[0], CP_F_OPEN_TIMESTAMP, 0);
        CP_F_SET(&final_job->file_runtime_array[0], CP_F_CLOSE_TIMESTAMP, 0);
        CP_F_SET(&final_job->file_runtime_array[0], CP_F_READ_START_TIMESTAMP, 0);
        CP_F_SET(&final_job->file_runtime_array[0], CP_F_READ_END_TIMESTAMP, 0);
        CP_F_SET(&final_job->file_runtime_array[0], CP_F_WRITE_START_TIMESTAMP, 0);
        CP_F_SET(&final_job->file_runtime_array[0], CP_F_WRITE_END_TIMESTAMP, 0);
    }

    logfile_name = malloc(PATH_MAX);
    if(!logfile_name)
    {
        darshan_finalize(final_job);
        return;
    }

443
    DARSHAN_MPI_CALL(PMPI_Comm_rank)(MPI_COMM_WORLD, &rank);
444

445
    /* collect information about command line and 
446 447
     * mounted file systems 
     */
448 449 450 451
    trailing_data = darshan_get_exe_and_mounts(final_job);

    /* broadcast mount point information from root */
    if(rank == 0)
452
    {
453 454 455 456
        memcpy(mnt_hash_array_root, mnt_hash_array,
            CP_MAX_MNTS*sizeof(uint64_t));
        memcpy(mnt_id_array_root, mnt_id_array,
            CP_MAX_MNTS*sizeof(int64_t));
457
    }
458

459 460 461 462 463 464
    bcst1=DARSHAN_MPI_CALL(PMPI_Wtime)();
    DARSHAN_MPI_CALL(PMPI_Bcast)(mnt_id_array_root,
        CP_MAX_MNTS*sizeof(int64_t), MPI_BYTE, 0, MPI_COMM_WORLD);
    DARSHAN_MPI_CALL(PMPI_Bcast)(mnt_hash_array_root,
        CP_MAX_MNTS*sizeof(uint64_t), MPI_BYTE, 0, MPI_COMM_WORLD);
    bcst2=DARSHAN_MPI_CALL(PMPI_Wtime)();
465

466 467 468 469 470 471 472 473 474 475 476 477
    /* identify any common mount points that have different device ids on
     * non-root processes
     */
    for(i=0; (i<CP_MAX_MNTS && mnt_hash_array_root[i] != 0); i++)
    {
        for(j=0; (j<CP_MAX_MNTS && mnt_hash_array[j] != 0); j++)
        {
            if(mnt_hash_array_root[i] == mnt_hash_array[j])
            {
                /* found a shared mount point */
                if(mnt_id_array_root[i] != mnt_id_array[j])
                {
Philip Carns's avatar
Philip Carns committed
478 479 480 481 482 483
                    /* mismatching ids; record correct mapping */
                    mnt_mapping[map_index].mnt_id_local =
                        mnt_id_array[j];
                    mnt_mapping[map_index].mnt_id_root = 
                        mnt_id_array_root[i];
                    map_index++;
484 485 486 487 488
                }
                break;
            }
        }
    }
Philip Carns's avatar
Philip Carns committed
489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504
 
    /* adjust affected file records */
    for(i=0; (i<final_job->file_count && map_index > 0); i++)
    {
        for(j=0; j<map_index; j++)
        {
            if(final_job->file_array[i].counters[CP_DEVICE] ==
                mnt_mapping[j].mnt_id_local)
            {
                final_job->file_array[i].counters[CP_DEVICE] =  
                    mnt_mapping[j].mnt_id_root;
                break;
            }
        }
    }
   
505 506 507 508 509 510
    /* construct log file name */
    if(rank == 0)
    {
        char cuser[L_cuserid] = {0};
        struct tm* my_tm;

511 512 513 514 515 516 517 518 519 520 521 522 523 524
        /* Use CP_JOBID_OVERRIDE for the env var or CP_JOBID */
        envjobid = getenv(CP_JOBID_OVERRIDE);
        if (!envjobid)
        {
            envjobid = CP_JOBID;
        }

        /* Use CP_LOG_PATH_OVERRIDE for the value or __CP_LOG_PATH */
        logpath = getenv(CP_LOG_PATH_OVERRIDE);
        if (!logpath)
        {
            logpath = __CP_LOG_PATH;
        }

525
        /* find a job id */
526
        jobid_str = getenv(envjobid);
527 528 529 530 531 532 533 534 535 536 537 538
        if(jobid_str)
        {
            /* in cobalt we can find it in env var */
            ret = sscanf(jobid_str, "%d", &jobid);
        }
        if(!jobid_str || ret != 1)
        {
            /* use pid as fall back */
            jobid = getpid();
        }

        /* break out time into something human readable */
539 540
        start_time_tmp += final_job->log_job.start_time;
        my_tm = localtime(&start_time_tmp);
541 542 543 544

        /* note: getpwuid() causes link errors for static binaries */
        cuserid(cuser);

545 546 547 548
        /* generate a random number to help differentiate the log */
        (void) gethostname(hname, sizeof(hname));
        logmod = darshan_hash((void*)hname,strlen(hname),0);

549
        ret = snprintf(logfile_name, PATH_MAX, 
550
            "%s/%d/%d/%d/%s_%s_id%d_%d-%d-%d-%llu.darshan_partial",
551
            logpath, (my_tm->tm_year+1900), 
552
            (my_tm->tm_mon+1), my_tm->tm_mday, 
553 554 555
            cuser, __progname, jobid,
            (my_tm->tm_mon+1), 
            my_tm->tm_mday, 
556 557
            (my_tm->tm_hour*60*60 + my_tm->tm_min*60 + my_tm->tm_sec),
            llu(logmod));
558 559 560 561 562
        if(ret == (PATH_MAX-1))
        {
            /* file name was too big; squish it down */
            snprintf(logfile_name, PATH_MAX,
                "%s/id%d.darshan_partial",
563
                logpath, jobid);
564
        }
565 566 567

        /* add jobid */
        final_job->log_job.jobid = (int64_t)jobid;
568 569 570
    }

    /* broadcast log file name */
571 572 573
    bcst3=DARSHAN_MPI_CALL(PMPI_Wtime)();
    DARSHAN_MPI_CALL(PMPI_Bcast)(logfile_name, PATH_MAX, MPI_CHAR, 0,
        MPI_COMM_WORLD);
574 575 576 577 578

    final_job->log_job.end_time = time(NULL);

    /* reduce records for shared files */
    if(timing_flag)
579
        red1 = DARSHAN_MPI_CALL(PMPI_Wtime)();
580 581
    local_ret = cp_log_reduction(final_job, rank, logfile_name, 
        &next_offset);
582
    if(timing_flag)
583 584
        red2 = DARSHAN_MPI_CALL(PMPI_Wtime)();
    DARSHAN_MPI_CALL(PMPI_Allreduce)(&local_ret, &all_ret, 1, MPI_INT, MPI_LOR, 
585 586 587 588 589 590
        MPI_COMM_WORLD);

    if(all_ret == 0)
    {
        /* collect data to write from local process */
        cp_log_construct_indices(final_job, rank, &index_count, lengths, 
591
            pointers, trailing_data);
592 593 594 595 596 597
    }

    if(all_ret == 0)
    {
        /* compress data */
        if(timing_flag)
598
            gz1 = DARSHAN_MPI_CALL(PMPI_Wtime)();
599 600 601
        local_ret = cp_log_compress(final_job, rank, &index_count, 
            lengths, pointers);
        if(timing_flag)
602 603 604
            gz2 = DARSHAN_MPI_CALL(PMPI_Wtime)();
        DARSHAN_MPI_CALL(PMPI_Allreduce)(&local_ret, &all_ret, 1,
            MPI_INT, MPI_LOR, MPI_COMM_WORLD);
605 606 607 608 609 610
    }

    if(all_ret == 0)
    {
        /* actually write out log file */
        if(timing_flag)
611
            write1 = DARSHAN_MPI_CALL(PMPI_Wtime)();
612
        local_ret = cp_log_write(final_job, rank, logfile_name, 
613 614
            index_count, lengths, pointers, start_log_time);
        if(timing_flag)
615 616 617
            write2 = DARSHAN_MPI_CALL(PMPI_Wtime)();
        DARSHAN_MPI_CALL(PMPI_Allreduce)(&local_ret, &all_ret, 1,
            MPI_INT, MPI_LOR, MPI_COMM_WORLD);
618 619 620 621 622 623 624 625 626 627
    }

    /* if any process failed to write log, then delete the whole file so we
     * don't leave corrupted results
     */
    if(all_ret != 0 && rank == 0)
    {
        unlink(logfile_name);
    }

628 629
    if(trailing_data)
        free(trailing_data);
630 631 632 633 634 635 636 637 638
    free(logfile_name);
    darshan_finalize(final_job);
    
    if(timing_flag)
    {
        double red_tm, red_slowest;
        double gz_tm, gz_slowest;
        double write_tm, write_slowest;
        double all_tm, all_slowest;
639
        double bcst_tm, bcst_slowest;
640
        
641
        tm_end = DARSHAN_MPI_CALL(PMPI_Wtime)();
642

643
        bcst_tm=(bcst2-bcst1)+(red1-bcst3);
644 645 646 647 648
        red_tm = red2-red1;
        gz_tm = gz2-gz1;
        write_tm = write2-write1;
        all_tm = tm_end-start_log_time;

649
        DARSHAN_MPI_CALL(PMPI_Allreduce)(&red_tm, &red_slowest, 1,
650
            MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
651
        DARSHAN_MPI_CALL(PMPI_Allreduce)(&gz_tm, &gz_slowest, 1,
652
            MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
653
        DARSHAN_MPI_CALL(PMPI_Allreduce)(&write_tm, &write_slowest, 1,
654
            MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
655
        DARSHAN_MPI_CALL(PMPI_Allreduce)(&all_tm, &all_slowest, 1,
656
            MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
657
        DARSHAN_MPI_CALL(PMPI_Allreduce)(&bcst_tm, &bcst_slowest, 1,
658
            MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
659 660 661

        if(rank == 0)
        {
662
            DARSHAN_MPI_CALL(PMPI_Comm_size)(MPI_COMM_WORLD, &nprocs);
663
            printf("#<op>\t<nprocs>\t<time>\n");
664
            printf("bcst\t%d\t%f\n", nprocs, bcst_slowest);
665 666 667 668 669 670 671 672 673 674 675 676 677 678
            printf("reduce\t%d\t%f\n", nprocs, red_slowest);
            printf("gzip\t%d\t%f\n", nprocs, gz_slowest);
            printf("write\t%d\t%f\n", nprocs, write_slowest);
            printf("all\t%d\t%f\n", nprocs, all_slowest);
        }
    }

    return;
}

int MPI_Finalize(void)
{
    int ret;

679 680 681 682
    if(getenv("DARSHAN_INTERNAL_TIMING"))
        darshan_shutdown(1);
    else
        darshan_shutdown(0);
683

684
    ret = DARSHAN_MPI_CALL(PMPI_Finalize)();
685 686 687 688 689 690 691 692 693 694 695 696 697 698
    return(ret);
}

int MPI_File_open(MPI_Comm comm, char *filename, int amode, MPI_Info info, MPI_File *fh) 
{
    int ret;
    struct darshan_file_runtime* file;
    char* tmp;
    int comm_size;
    int hash_index;
    uint64_t tmp_hash;
    double tm1, tm2;

    tm1 = darshan_wtime();
699
    ret = DARSHAN_MPI_CALL(PMPI_File_open)(comm, filename, amode, info, fh);
700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
    tm2 = darshan_wtime();

    if(ret == MPI_SUCCESS)
    {
        CP_LOCK();

        /* 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;
        }

        file = darshan_file_by_name(filename);
        /* TODO: handle the case of multiple concurrent opens */
        if(file && (file->fh == MPI_FILE_NULL))
        {
            file->fh = *fh;
            CP_SET(file, CP_MODE, amode);
            CP_F_INC(file, CP_F_MPI_META_TIME, (tm2-tm1));
            if(CP_F_VALUE(file, CP_F_OPEN_TIMESTAMP) == 0)
724 725 726
                CP_F_SET(file, CP_F_OPEN_TIMESTAMP,
                DARSHAN_MPI_CALL(PMPI_Wtime)());
            DARSHAN_MPI_CALL(PMPI_Comm_size)(comm, &comm_size);
727 728 729 730 731 732 733 734 735 736 737 738
            if(comm_size == 1)
            {
                CP_INC(file, CP_INDEP_OPENS, 1);
            }
            else
            {
                CP_INC(file, CP_COLL_OPENS, 1);
            }
            if(info != MPI_INFO_NULL)
            {
                CP_INC(file, CP_HINTS, 1);
            }
739
            tmp_hash = darshan_hash((void*)fh, sizeof(*fh), 0);
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762
            hash_index = tmp_hash & CP_HASH_MASK;
            file->fh_prev = NULL;
            file->fh_next = darshan_global_job->fh_table[hash_index];
            if(file->fh_next)
                file->fh_next->fh_prev = file;
            darshan_global_job->fh_table[hash_index] = file;
        }
        CP_UNLOCK();
    }

    return(ret);
}

int MPI_File_close(MPI_File *fh) 
{
    int hash_index;
    uint64_t tmp_hash;
    struct darshan_file_runtime* file;
    MPI_File tmp_fh = *fh;
    double tm1, tm2;
    int ret;
    
    tm1 = darshan_wtime();
763
    ret = DARSHAN_MPI_CALL(PMPI_File_close)(fh);
764 765 766 767 768 769 770
    tm2 = darshan_wtime();

    CP_LOCK();
    file = darshan_file_by_fh(tmp_fh);
    if(file)
    {
        file->fh = MPI_FILE_NULL;
771
        CP_F_SET(file, CP_F_CLOSE_TIMESTAMP, DARSHAN_MPI_CALL(PMPI_Wtime)());
772 773 774 775
        CP_F_INC(file, CP_F_MPI_META_TIME, (tm2-tm1));
        if(file->fh_prev == NULL)
        {
            /* head of fh hash table list */
776
            tmp_hash = darshan_hash((void*)&tmp_fh, sizeof(tmp_fh), 0);
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
            hash_index = tmp_hash & CP_HASH_MASK;
            darshan_global_job->fh_table[hash_index] = file->fh_next;
            if(file->fh_next)
                file->fh_next->fh_prev = NULL;
        }
        else
        {
            if(file->fh_prev)
                file->fh_prev->fh_next = file->fh_next;
            if(file->fh_next)
                file->fh_next->fh_prev = file->fh_prev;
        }
        file->fh_prev = NULL;
        file->fh_next = NULL;
        darshan_global_job->darshan_mru_file = file; /* in case we open it again, or hit posix calls */
    }
    CP_UNLOCK();

    return(ret);
}

int MPI_File_sync(MPI_File fh)
{
    int ret;
    struct darshan_file_runtime* file;
    double tm1, tm2;

    tm1 = darshan_wtime();
805
    ret = DARSHAN_MPI_CALL(PMPI_File_sync)(fh);
806 807 808 809 810 811 812
    tm2 = darshan_wtime();
    if(ret == MPI_SUCCESS)
    {
        CP_LOCK();
        file = darshan_file_by_fh(fh);
        if(file)
        {
813
            CP_F_INC(file, CP_F_MPI_WRITE_TIME, (tm2-tm1));
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830
            CP_INC(file, CP_SYNCS, 1);
        }
        CP_UNLOCK();
    }

    return(ret);
}


int MPI_File_set_view(MPI_File fh, MPI_Offset disp, MPI_Datatype etype, 
    MPI_Datatype filetype, char *datarep, MPI_Info info)
{
    int ret;
    struct darshan_file_runtime* file;
    double tm1, tm2;

    tm1 = darshan_wtime();
831 832
    ret = DARSHAN_MPI_CALL(PMPI_File_set_view)(fh, disp, etype,
        filetype, datarep, info);
833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860
    tm2 = darshan_wtime();
    if(ret == MPI_SUCCESS)
    {
        CP_LOCK();
        file = darshan_file_by_fh(fh);
        if(file)
        {
            CP_INC(file, CP_VIEWS, 1);
            if(info != MPI_INFO_NULL)
            {
                CP_F_INC(file, CP_F_MPI_META_TIME, (tm2-tm1));
                CP_INC(file, CP_HINTS, 1);
            }
            CP_DATATYPE_INC(file, filetype);
        }
        CP_UNLOCK();
    }

    return(ret);
}

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

    tm1 = darshan_wtime();
861
    ret = DARSHAN_MPI_CALL(PMPI_File_read)(fh, buf, count, datatype, status);
862 863 864 865 866 867 868 869 870 871 872 873 874 875
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_INDEP_READS, tm1, tm2);
    CP_UNLOCK();
    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_wtime();
876 877
    ret = DARSHAN_MPI_CALL(PMPI_File_read_at)(fh, offset, buf,
        count, datatype, status);
878 879 880 881 882 883 884 885 886 887 888 889 890 891
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_INDEP_READS, tm1, tm2);
    CP_UNLOCK();
    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_wtime();
892 893
    ret = DARSHAN_MPI_CALL(PMPI_File_read_at_all)(fh, offset, buf,
        count, datatype, status);
894 895 896 897 898 899 900 901 902 903 904 905 906
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_COLL_READS, tm1, tm2);
    CP_UNLOCK();
    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_wtime();
907 908
    ret = DARSHAN_MPI_CALL(PMPI_File_read_all)(fh, buf, count,
        datatype, status);
909 910 911 912 913 914 915 916 917 918 919 920 921
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_COLL_READS, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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_wtime();
922 923
    ret = DARSHAN_MPI_CALL(PMPI_File_read_shared)(fh, buf, count,
        datatype, status);
924 925 926 927 928 929 930 931 932 933 934 935 936 937
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_INDEP_READS, tm1, tm2);
    CP_UNLOCK();
    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_wtime();
938 939
    ret = DARSHAN_MPI_CALL(PMPI_File_read_ordered)(fh, buf, count,
        datatype, status);
940 941 942 943 944 945 946 947 948 949 950 951 952 953
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_COLL_READS, tm1, tm2);
    CP_UNLOCK();
    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_wtime();
954 955
    ret = DARSHAN_MPI_CALL(PMPI_File_read_at_all_begin)(fh, offset, buf,
        count, datatype);
956 957 958 959 960 961 962 963 964 965 966 967 968
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_SPLIT_READS, tm1, tm2);
    CP_UNLOCK();
    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_wtime();
969
    ret = DARSHAN_MPI_CALL(PMPI_File_read_all_begin)(fh, buf, count, datatype);
970 971 972 973 974 975 976 977 978 979 980 981 982
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_SPLIT_READS, tm1, tm2);
    CP_UNLOCK();
    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_wtime();
983 984
    ret = DARSHAN_MPI_CALL(PMPI_File_read_ordered_begin)(fh, buf, count,
        datatype);
985 986 987 988 989 990 991 992 993 994 995 996 997 998
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_SPLIT_READS, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
999 1000
    ret = DARSHAN_MPI_CALL(PMPI_File_iread_at)(fh, offset, buf, count,
        datatype, request);
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_NB_READS, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1014
    ret = DARSHAN_MPI_CALL(PMPI_File_iread)(fh, buf, count, datatype, request);
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_NB_READS, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1029 1030
    ret = DARSHAN_MPI_CALL(PMPI_File_iread_shared)(fh, buf, count,
        datatype, request);
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_READ(ret, fh, count, datatype, CP_NB_READS, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}


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

    tm1 = darshan_wtime();
1046
    ret = DARSHAN_MPI_CALL(PMPI_File_write)(fh, buf, count, datatype, status);
1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_INDEP_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1061 1062
    ret = DARSHAN_MPI_CALL(PMPI_File_write_at)(fh, offset, buf,
        count, datatype, status);
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_INDEP_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

int MPI_File_write_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_wtime();
1077 1078
    ret = DARSHAN_MPI_CALL(PMPI_File_write_at_all)(fh, offset, buf,
        count, datatype, status);
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_COLL_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1092 1093
    ret = DARSHAN_MPI_CALL(PMPI_File_write_all)(fh, buf, count,
        datatype, status);
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_COLL_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1107 1108
    ret = DARSHAN_MPI_CALL(PMPI_File_write_shared)(fh, buf, count,
        datatype, status);
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_INDEP_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1123 1124
    ret = DARSHAN_MPI_CALL(PMPI_File_write_ordered)(fh, buf, count,
         datatype, status);
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_COLL_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1139 1140
    ret = DARSHAN_MPI_CALL(PMPI_File_write_at_all_begin)(fh, offset,
        buf, count, datatype);
1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_SPLIT_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1154
    ret = DARSHAN_MPI_CALL(PMPI_File_write_all_begin)(fh, buf, count, datatype);
1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_SPLIT_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1168 1169
    ret = DARSHAN_MPI_CALL(PMPI_File_write_ordered_begin)(fh, buf, count,
        datatype);
1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_SPLIT_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1184 1185
    ret = DARSHAN_MPI_CALL(PMPI_File_iwrite_at)(fh, offset, buf,
        count, datatype, request);
1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_NB_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1199
    ret = DARSHAN_MPI_CALL(PMPI_File_iwrite)(fh, buf, count, datatype, request);
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_NB_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

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

    tm1 = darshan_wtime();
1214 1215
    ret = DARSHAN_MPI_CALL(PMPI_File_iwrite_shared)(fh, buf, count,
        datatype, request);
1216 1217 1218 1219 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
    tm2 = darshan_wtime();
    CP_LOCK();
    CP_RECORD_MPI_WRITE(ret, fh, count, datatype, CP_NB_WRITES, tm1, tm2);
    CP_UNLOCK();
    return(ret);
}

static struct darshan_file_runtime* darshan_file_by_fh(MPI_File fh)
{
    struct darshan_file_runtime* tmp_file;
    uint64_t tmp_hash = 0;
    int hash_index;

    if(!darshan_global_job)
        return(NULL);

    /* if we have already condensed the data, then just hand the first file
     * back
     */
    if(darshan_global_job->flags & CP_FLAG_CONDENSED)
    {
        return(&darshan_global_job->file_runtime_array[0]);
    }

    /* check most recently used */
    if(darshan_global_job->darshan_mru_file && darshan_global_job->darshan_mru_file->fh == fh)
    {
        return(darshan_global_job->darshan_mru_file);
    }

1246
    tmp_hash = darshan_hash((void*)(&fh), sizeof(fh), 0);
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270

    /* search hash table */
    hash_index = tmp_hash & CP_HASH_MASK;
    tmp_file = darshan_global_job->fh_table[hash_index];
    while(tmp_file)
    {
        if(tmp_file->fh == fh)
        {
            darshan_global_job->darshan_mru_file = tmp_file;
            return(tmp_file);
        }
        tmp_file = tmp_file->fh_next;
    }

    return(NULL);
}

/* cp_log_reduction()
 *
 * Identify shared files and reduce them to one log entry
 *
 * returns 0 on success, -1 on failure
 */
static int cp_log_reduction(struct darshan_job_runtime* final_job, int rank, 
1271
    char* logfile_name, MPI_Offset* next_offset)
1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285
{
    /* TODO: these need to be allocated differently now, too big */
    uint64_t hash_array[CP_MAX_FILES] = {0};
    int mask_array[CP_MAX_FILES] = {0};
    int all_mask_array[CP_MAX_FILES] = {0};
    int ret;
    int i;
    int j;
    MPI_Op reduce_op;
    MPI_Datatype rtype;
    struct darshan_file* tmp_array = NULL;
    int shared_count = 0;

    /* register a reduction operation */
1286
    ret = DARSHAN_MPI_CALL(PMPI_Op_create)(darshan_file_reduce, 1, &reduce_op); 
1287 1288 1289 1290 1291 1292 1293 1294
    if(ret != 0)
    {
        return(-1);
    }

    /* construct a datatype for a file record.  This is serving no purpose
     * except to make sure we can do a reduction on proper boundaries
     */
1295 1296 1297
    DARSHAN_MPI_CALL(PMPI_Type_contiguous)(sizeof(struct darshan_file),
        MPI_BYTE, &rtype); 
    DARSHAN_MPI_CALL(PMPI_Type_commit)(&rtype); 
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308

    /* gather list of files that root process has opened */
    if(rank == 0)
    {
        for(i=0; i<final_job->file_count; i++)
        {
            hash_array[i] = final_job->file_array[i].hash;
        }
    }

    /* broadcast list of files to all other processes */
1309 1310
    ret = DARSHAN_MPI_CALL(PMPI_Bcast)(hash_array,
        (CP_MAX_FILES * sizeof(uint64_t)), 
1311 1312 1313
        MPI_BYTE, 0, MPI_COMM_WORLD);
    if(ret != 0)
    {
1314
        DARSHAN_MPI_CALL(PMPI_Op_free)(&reduce_op);
1315
        DARSHAN_MPI_CALL(PMPI_Type_free)(&rtype);
1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333
        return(-1);
    }

    /* everyone looks to see if they have also opened that same file */
    for(i=0; (i<CP_MAX_FILES && hash_array[i] != 0); i++)
    {
        for(j=0; j<final_job->file_count; j++)
        {
            if(hash_array[i] && final_job->file_array[j].hash == hash_array[i])
            {
                /* we opened that file too */
                mask_array[i] = 1;
                break;
            }
        }
    }

    /* now allreduce so that everyone agrees on which files are shared */
1334 1335
    ret = DARSHAN_MPI_CALL(PMPI_Allreduce)(mask_array, all_mask_array,
        CP_MAX_FILES, MPI_INT, MPI_LAND, MPI_COMM_WORLD);
1336 1337
    if(ret != 0)
    {
1338
        DARSHAN_MPI_CALL(PMPI_Op_free)(&reduce_op);
1339
        DARSHAN_MPI_CALL(PMPI_Type_free)(&rtype);
1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354
        return(-1);
    }

    /* walk through mask array counting entries and marking corresponding
     * files with a rank of -1
     */
    for(i=0; i<CP_MAX_FILES; i++)
    {
        if(all_mask_array[i])
        {