darshan-mpiio.c 44.2 KB
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/*
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 * Copyright (C) 2015 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
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 */

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#define _XOPEN_SOURCE 500
#define _GNU_SOURCE

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#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"
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#include "darshan-dynamic.h"
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/* The mpiio_file_record_ref structure maintains necessary runtime metadata
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 * for the MPIIO file record (darshan_mpiio_file structure, defined in
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 * darshan-mpiio-log-format.h) pointed to by 'file_rec'. This metadata
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 * 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
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 * 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).
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 *
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 * 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.
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 */
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struct mpiio_file_record_ref
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{
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    struct darshan_mpiio_file *file_rec;
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    enum darshan_io_type last_io_type;
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    double last_meta_end;
    double last_read_end;
    double last_write_end;
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    void *access_root;
    int access_count;
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};

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/* The mpiio_runtime structure maintains necessary state for storing
 * MPI-IO file records and for coordinating with darshan-core at 
 * shutdown time.
 */
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struct mpiio_runtime
{
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    void *rec_id_hash;
    void *fh_hash;
    int file_rec_count;
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};

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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 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);

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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;

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#define MPIIO_LOCK() pthread_mutex_lock(&mpiio_runtime_mutex)
#define MPIIO_UNLOCK() pthread_mutex_unlock(&mpiio_runtime_mutex)

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#define MPIIO_PRE_RECORD() do { \
    MPIIO_LOCK(); \
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    if(!instrumentation_disabled) { \
        if(!mpiio_runtime) mpiio_runtime_initialize(); \
        if(mpiio_runtime) break; \
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    } \
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    MPIIO_UNLOCK(); \
    return(ret); \
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} while(0)

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

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#define MPIIO_RECORD_OPEN(__ret, __path, __fh, __comm, __mode, __info, __tm1, __tm2) do { \
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    darshan_record_id rec_id; \
    struct mpiio_file_record_ref *rec_ref; \
    char *newpath; \
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    int comm_size; \
    if(__ret != MPI_SUCCESS) break; \
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    newpath = darshan_clean_file_path(__path); \
    if(!newpath) newpath = (char *)__path; \
    if(darshan_core_excluded_path(newpath)) { \
        if(newpath != __path) free(newpath); \
        break; \
    } \
    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) { \
        if(newpath != __path) free(newpath); \
        break; \
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    } \
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    rec_ref->file_rec->counters[MPIIO_MODE] = __mode; \
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    DARSHAN_MPI_CALL(PMPI_Comm_size)(__comm, &comm_size); \
    if(comm_size == 1) \
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        rec_ref->file_rec->counters[MPIIO_INDEP_OPENS] += 1; \
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    else \
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        rec_ref->file_rec->counters[MPIIO_COLL_OPENS] += 1; \
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    if(__info != MPI_INFO_NULL) \
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        rec_ref->file_rec->counters[MPIIO_HINTS] += 1; \
    if(rec_ref->file_rec->fcounters[MPIIO_F_OPEN_TIMESTAMP] == 0 || \
     rec_ref->file_rec->fcounters[MPIIO_F_OPEN_TIMESTAMP] > __tm1) \
        rec_ref->file_rec->fcounters[MPIIO_F_OPEN_TIMESTAMP] = __tm1; \
    DARSHAN_TIMER_INC_NO_OVERLAP(rec_ref->file_rec->fcounters[MPIIO_F_META_TIME], \
        __tm1, __tm2, rec_ref->last_meta_end); \
    darshan_add_record_ref(&(mpiio_runtime->fh_hash), &__fh, sizeof(MPI_File), rec_ref); \
    if(newpath != __path) free(newpath); \
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} while(0)

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#define MPIIO_RECORD_READ(__ret, __fh, __count, __datatype, __counter, __tm1, __tm2) do { \
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    struct mpiio_file_record_ref *rec_ref; \
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    int size = 0; \
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    double __elapsed = __tm2-__tm1; \
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    if(__ret != MPI_SUCCESS) break; \
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    rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash, &(__fh), sizeof(MPI_File)); \
    if(!rec_ref) break; \
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    DARSHAN_MPI_CALL(PMPI_Type_size)(__datatype, &size);  \
    size = size * __count; \
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    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; \
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    if(rec_ref->file_rec->fcounters[MPIIO_F_READ_START_TIMESTAMP] == 0 || \
     rec_ref->file_rec->fcounters[MPIIO_F_READ_START_TIMESTAMP] > __tm1) \
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        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); \
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} while(0)
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#define MPIIO_RECORD_WRITE(__ret, __fh, __count, __datatype, __counter, __tm1, __tm2) do { \
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    struct mpiio_file_record_ref *rec_ref; \
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    int size = 0; \
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    double __elapsed = __tm2-__tm1; \
    if(__ret != MPI_SUCCESS) break; \
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    rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash, &(__fh), sizeof(MPI_File)); \
    if(!rec_ref) break; \
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    DARSHAN_MPI_CALL(PMPI_Type_size)(__datatype, &size);  \
    size = size * __count; \
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    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; \
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    if(rec_ref->file_rec->fcounters[MPIIO_F_WRITE_START_TIMESTAMP] == 0 || \
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     rec_ref->file_rec->fcounters[MPIIO_F_WRITE_START_TIMESTAMP] > __tm1) \
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        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); \
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} while(0)

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/**********************************************************
 *        Wrappers for MPI-IO functions of interest       * 
 **********************************************************/
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#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;
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    MPI_File tmp_fh;
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    char* tmp;
    double tm1, tm2;

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

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    /* 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;
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    }

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    MPIIO_PRE_RECORD();
    tmp_fh = *fh;
    MPIIO_RECORD_OPEN(ret, filename, tmp_fh, comm, amode, info, tm1, tm2);
    MPIIO_POST_RECORD();

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    return(ret);
}

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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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_INDEP_READS, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_INDEP_WRITES, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_INDEP_READS, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_INDEP_WRITES, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_COLL_READS, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_COLL_WRITES, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_COLL_READS, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_COLL_WRITES, tm1, tm2);
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    MPIIO_POST_RECORD();

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    return(ret);
}

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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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_INDEP_READS, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_INDEP_WRITES, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_COLL_READS, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_COLL_WRITES, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

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    MPIIO_PRE_RECORD();
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    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_SPLIT_READS, tm1, tm2);
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    MPIIO_POST_RECORD();

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    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();

510
    MPIIO_PRE_RECORD();
511
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_SPLIT_WRITES, tm1, tm2);
512 513
    MPIIO_POST_RECORD();

514 515 516 517 518 519 520 521 522 523 524 525 526 527
    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();
    
528
    MPIIO_PRE_RECORD();
529
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_SPLIT_READS, tm1, tm2);
530 531
    MPIIO_POST_RECORD();

532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
    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();

551
    MPIIO_PRE_RECORD();
552
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_SPLIT_WRITES, tm1, tm2);
553 554
    MPIIO_POST_RECORD();

555 556 557 558 559 560 561 562 563 564 565 566 567
    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();

568
    MPIIO_PRE_RECORD();
569
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_SPLIT_READS, tm1, tm2);
570 571
    MPIIO_POST_RECORD();

572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588
    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();

589
    MPIIO_PRE_RECORD();
590
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_SPLIT_WRITES, tm1, tm2);
591 592
    MPIIO_POST_RECORD();

593 594 595 596 597 598 599 600 601 602 603 604
    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();

605
    MPIIO_PRE_RECORD();
606
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_NB_READS, tm1, tm2);
607 608
    MPIIO_POST_RECORD();

609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626
    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();

627
    MPIIO_PRE_RECORD();
628
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_NB_WRITES, tm1, tm2);
629 630
    MPIIO_POST_RECORD();

631 632 633 634 635 636 637 638 639 640 641 642 643 644
    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();

645
    MPIIO_PRE_RECORD();
646
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_NB_READS, tm1, tm2);
647 648
    MPIIO_POST_RECORD();

649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667
    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();

668
    MPIIO_PRE_RECORD();
669
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_NB_WRITES, tm1, tm2);
670 671
    MPIIO_POST_RECORD();

672 673 674 675 676 677 678 679 680 681 682 683 684 685
    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();

686
    MPIIO_PRE_RECORD();
687
    MPIIO_RECORD_READ(ret, fh, count, datatype, MPIIO_NB_READS, tm1, tm2);
688 689
    MPIIO_POST_RECORD();

690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708
    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();

709
    MPIIO_PRE_RECORD();
710
    MPIIO_RECORD_WRITE(ret, fh, count, datatype, MPIIO_NB_WRITES, tm1, tm2);
711 712
    MPIIO_POST_RECORD();

713 714
    return(ret);
}
715 716 717 718

int MPI_File_sync(MPI_File fh)
{
    int ret;
719
    struct mpiio_file_record_ref *rec_ref;
720 721 722 723 724 725 726 727
    double tm1, tm2;

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

    if(ret == MPI_SUCCESS)
    {
728 729 730 731
        MPIIO_PRE_RECORD();
        rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash,
            &fh, sizeof(MPI_File));
        if(rec_ref)
732
        {
733
            rec_ref->file_rec->counters[MPIIO_SYNCS] += 1;
734
            DARSHAN_TIMER_INC_NO_OVERLAP(
735 736
                rec_ref->file_rec->fcounters[MPIIO_F_WRITE_TIME],
                tm1, tm2, rec_ref->last_write_end);
737
        }
738
        MPIIO_POST_RECORD();
739 740 741 742 743 744 745 746 747 748 749 750 751 752
    }

    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;
753
    struct mpiio_file_record_ref *rec_ref;
754 755 756 757 758 759 760 761 762
    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)
    {
763 764 765 766
        MPIIO_PRE_RECORD();
        rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash,
            &fh, sizeof(MPI_File));
        if(rec_ref)
767
        {
768
            rec_ref->file_rec->counters[MPIIO_VIEWS] += 1;
769 770
            if(info != MPI_INFO_NULL)
            {
771
                rec_ref->file_rec->counters[MPIIO_HINTS] += 1;
772
                DARSHAN_TIMER_INC_NO_OVERLAP(
773 774
                    rec_ref->file_rec->fcounters[MPIIO_F_META_TIME],
                    tm1, tm2, rec_ref->last_meta_end);
775 776
           }
        }
777
        MPIIO_POST_RECORD();
778 779 780 781 782
    }

    return(ret);
}

783 784 785
int MPI_File_close(MPI_File *fh)
{
    int ret;
786
    struct mpiio_file_record_ref *rec_ref;
787
    MPI_File tmp_fh = *fh;
788 789 790 791 792 793
    double tm1, tm2;

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

794 795 796 797
    MPIIO_PRE_RECORD();
    rec_ref = darshan_lookup_record_ref(mpiio_runtime->fh_hash,
        &tmp_fh, sizeof(MPI_File));
    if(rec_ref)
798
    {
799
        rec_ref->file_rec->fcounters[MPIIO_F_CLOSE_TIMESTAMP] =
800 801
            darshan_core_wtime();
        DARSHAN_TIMER_INC_NO_OVERLAP(
802 803 804 805
            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));
806
    }
807
    MPIIO_POST_RECORD();
808 809 810 811 812 813 814 815 816

    return(ret);
}

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

/* initialize data structures and register with darshan-core component */
817 818
static void mpiio_runtime_initialize()
{
819
    int mpiio_buf_size;
820

821 822 823
    /* try and store the default number of records for this module */
    mpiio_buf_size = DARSHAN_DEF_MOD_REC_COUNT * sizeof(struct darshan_mpiio_file);

824 825 826
    /* register the mpiio module with darshan core */
    darshan_core_register_module(
        DARSHAN_MPIIO_MOD,
827
        &mpiio_shutdown,
828
        &mpiio_buf_size,
829
        &my_rank,
830
        NULL);
831

832 833
    /* return if darshan-core does not provide enough module memory */
    if(mpiio_buf_size < sizeof(struct darshan_mpiio_file))
834 835
    {
        darshan_core_unregister_module(DARSHAN_MPIIO_MOD);
836
        return;
837
    }
838 839 840

    mpiio_runtime = malloc(sizeof(*mpiio_runtime));
    if(!mpiio_runtime)
841 842
    {
        darshan_core_unregister_module(DARSHAN_MPIIO_MOD);
843
        return;
844
    }
845 846 847 848 849
    memset(mpiio_runtime, 0, sizeof(*mpiio_runtime));

    return;
}

850 851
static struct mpiio_file_record_ref *mpiio_track_new_file_record(
    darshan_record_id rec_id, const char *path)
852
{
853 854
    struct darshan_mpiio_file *file_rec = NULL;
    struct mpiio_file_record_ref *rec_ref = NULL;
855
    int ret;
856

857 858
    rec_ref = malloc(sizeof(*rec_ref));
    if(!rec_ref)
859
        return(NULL);
860
    memset(rec_ref, 0, sizeof(*rec_ref));
861

862 863 864 865
    /* 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)
866
    {
867
        free(rec_ref);
868 869 870
        return(NULL);
    }

871 872
    /* register the actual file record with darshan-core so it is persisted
     * in the log file
873
     */
874 875 876 877 878 879
    file_rec = darshan_core_register_record(
        rec_id,
        path,
        DARSHAN_MPIIO_MOD,
        sizeof(struct darshan_mpiio_file),
        NULL);
880

881
    if(!file_rec)
882
    {
883 884 885 886
        darshan_delete_record_ref(&(mpiio_runtime->rec_id_hash),
            &rec_id, sizeof(darshan_record_id));
        free(rec_ref);
        return(NULL);
887 888
    }

889 890 891 892 893 894 895
    /* 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);
896 897
}

898 899 900 901 902 903 904 905 906
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;

    tdestroy(rec_ref->access_root, free);
    return;
}

907 908 909 910 911
static void mpiio_record_reduction_op(
    void* infile_v,
    void* inoutfile_v,
    int *len,
    MPI_Datatype *datatype)
912
{
913 914 915
    struct darshan_mpiio_file tmp_file;
    struct darshan_mpiio_file *infile = infile_v;
    struct darshan_mpiio_file *inoutfile = inoutfile_v;
916
    int i, j, k;
917

918 919 920
    for(i=0; i<*len; i++)
    {
        memset(&tmp_file, 0, sizeof(struct darshan_mpiio_file));
921 922
        tmp_file.base_rec.id = infile->base_rec.id;
        tmp_file.base_rec.rank = -1;
923 924

        /* sum */
925 926 927 928 929 930 931 932 933
        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++)
934 935 936 937
        {
            tmp_file.counters[j] = infile->counters[j] + inoutfile->counters[j];
        }

938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
        /* 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],
964
                infile->counters[j+4], 0);
965 966 967 968
        }

        /* second set */
        for(j=MPIIO_ACCESS1_ACCESS; j<=MPIIO_ACCESS4_ACCESS; j++)
969
        {
970 971
            DARSHAN_COMMON_VAL_COUNTER_INC(&(tmp_file.counters[MPIIO_ACCESS1_ACCESS]),
                &(tmp_file.counters[MPIIO_ACCESS1_COUNT]), inoutfile->counters[j],
972
                inoutfile->counters[j+4], 0);
973 974 975
        }

        /* min non-zero (if available) value */
976
        for(j=MPIIO_F_OPEN_TIMESTAMP; j<=MPIIO_F_WRITE_START_TIMESTAMP; j++)
977
        {
978 979
            if((infile->fcounters[j] < inoutfile->fcounters[j] &&
               infile->fcounters[j] > 0) || inoutfile->fcounters[j] == 0)
980
                tmp_file.fcounters[j] = infile->fcounters[j];
981 982
            else
                tmp_file.fcounters[j] = inoutfile->fcounters[j];
983 984
        }

985 986 987 988 989 990 991 992 993 994 995 996
        /* 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++)
        {
997
            tmp_file.fcounters[j] = infile->fcounters[j] + inoutfile->fcounters[j];
998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
        }

        /* 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];
        }

1033 1034 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 1070 1071 1072 1073 1074
        /* 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];
        }

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

    return;
}

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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;
}

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static void mpiio_cleanup_runtime()
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{
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    darshan_clear_record_refs(&(mpiio_runtime->fh_hash), 0);
    darshan_clear_record_refs(&(mpiio_runtime->rec_id_hash), 1);
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    free(mpiio_runtime);
    mpiio_runtime = NULL;
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    instrumentation_disabled = 0;
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    return;
}

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/* mpiio module shutdown benchmark routine */
void darshan_mpiio_shutdown_bench_setup(int test_case)
{
    char filepath[256];
    MPI_File *fh_array;
    int64_t *size_array;
    int i;
    intptr_t j;

    if(mpiio_runtime)
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        mpiio_cleanup_runtime();
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    mpiio_runtime_initialize();

    srand(my_rank);
    fh_array = malloc(1024 * sizeof(MPI_File));
    size_array = malloc(DARSHAN_COMMON_VAL_MAX_RUNTIME_COUNT * sizeof(int64_t));
    assert(fh_array && size_array);

    for(j = 0; j < 1024; j++)
        fh_array[j] = (MPI_File)j;
    for(i = 0; i < DARSHAN_COMMON_VAL_MAX_RUNTIME_COUNT; i++)
        size_array[i] = rand();

    switch(test_case)
    {
        case 1: /* single file-per-process */
            snprintf(filepath, 256, "fpp-0_rank-%d", my_rank);

            MPIIO_RECORD_OPEN(MPI_SUCCESS, filepath, fh_array[0], MPI_COMM_SELF,
                2, MPI_INFO_NULL, 0, 1);
            MPIIO_RECORD_WRITE(MPI_SUCCESS, fh_array[0], size_array[0], MPI_BYTE,
                MPIIO_INDEP_WRITES, 1, 2);

            break;
        case 2: /* single shared file */
            snprintf(filepath, 256, "shared-0");

            MPIIO_RECORD_OPEN(MPI_SUCCESS, filepath, fh_array[0], MPI_COMM_WORLD,
                2, MPI_INFO_NULL, 0, 1);
            MPIIO_RECORD_WRITE(MPI_SUCCESS, fh_array[0], size_array[0], MPI_BYTE,
                MPIIO_COLL_WRITES, 1, 2);

            break;
        case 3: /* 1024 unique files per proc */
            for(i = 0; i < 1024; i++)
            {
                snprintf(filepath, 256, "fpp-%d_rank-%d", i , my_rank);

                MPIIO_RECORD_OPEN(MPI_SUCCESS, filepath, fh_array[i], MPI_COMM_SELF,
                    2, MPI_INFO_NULL, 0, 1);
                MPIIO_RECORD_WRITE(MPI_SUCCESS, fh_array[i],
                    size_array[i % DARSHAN_COMMON_VAL_MAX_RUNTIME_COUNT],
                    MPI_BYTE, MPIIO_INDEP_WRITES, 1, 2);
            }

            break;
        case 4: /* 1024 shared files per proc */
            for(i = 0; i < 1024; i++)
            {
                snprintf(filepath, 256, "shared-%d", i);

                MPIIO_RECORD_OPEN(MPI_SUCCESS, filepath, fh_array[i], MPI_COMM_WORLD,
                    2, MPI_INFO_NULL, 0, 1);
                MPIIO_RECORD_WRITE(MPI_SUCCESS, fh_array[i],
                    size_array[i % DARSHAN_COMMON_VAL_MAX_RUNTIME_COUNT],
                    MPI_BYTE, MPIIO_COLL_WRITES, 1, 2);
            }
            break;
        default:
            fprintf(stderr, "Error: invalid Darshan benchmark test case.\n");
            return;
    }

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    free(fh_array);
    free(size_array);

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    return;
}

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/********************************************************************************
 * shutdown function exported by this module for coordinating with darshan-core *
 ********************************************************************************/
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static void mpiio_shutdown(
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    MPI_Comm mod_comm,
    darshan_record_id *shared_recs,
    int shared_rec_count,
    void **mpiio_buf,
    int *mpiio_buf_sz)
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{
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    struct mpiio_file_record_ref *rec_ref;
    struct darshan_mpiio_file *mpiio_rec_buf = *(struct darshan_mpiio_file **)mpiio_buf;
    int mpiio_rec_count;
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    double mpiio_time;
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    struct darshan_mpiio_file *red_send_buf = NULL;
    struct darshan_mpiio_file *red_recv_buf = NULL;
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    MPI_Datatype red_type;
    MPI_Op red_op;
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    int i;
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    MPIIO_LOCK();
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    assert(mpiio_runtime);
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    /* disable further instrumentation while we shutdown */
    instrumentation_disabled = 1;

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    mpiio_rec_count = mpiio_runtime->file_rec_count;
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    /* perform any final transformations on MPIIO file records before
     * writing them out to log file
     */
    darshan_iter_record_refs(mpiio_runtime->rec_id_hash, &mpiio_finalize_file_records);
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    /* if there are globally shared files, do a shared file reduction */
    /* NOTE: the shared file reduction is also skipped if the 
     * DARSHAN_DISABLE_SHARED_REDUCTION environment variable is set.
     */
    if(shared_rec_count && !getenv("DARSHAN_DISABLE_SHARED_REDUCTION"))
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    {
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        /* necessary initialization of shared records */
        for(i = 0; i < shared_rec_count; i++)
        {
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            rec_ref = darshan_lookup_record_ref(mpiio_runtime->rec_id_hash,
                &shared_recs[i], sizeof(darshan_record_id));
            assert(rec_ref);
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            mpiio_time =
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                rec_ref->file_rec->fcounters[MPIIO_F_READ_TIME] +
                rec_ref->file_rec->fcounters[MPIIO_F_WRITE_TIME] +
                rec_ref->file_rec->fcounters[MPIIO_F_META_TIME];
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            /* initialize fastest/slowest info prior to the reduction */
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            rec_ref->file_rec->counters[MPIIO_FASTEST_RANK] =
                rec_ref->file_rec->base_rec.rank;
            rec_ref->file_rec->counters[MPIIO_FASTEST_RANK_BYTES] =
                rec_ref->file_rec->counters[MPIIO_BYTES_READ] +
                rec_ref->file_rec->counters[MPIIO_BYTES_WRITTEN];
            rec_ref->file_rec->fcounters[MPIIO_F_FASTEST_RANK_TIME] =
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                mpiio_time;

            /* until reduction occurs, we assume that this rank is both
             * the fastest and slowest. It is up to the reduction operator
             * to find the true min and max.
             */
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            rec_ref->file_rec->counters[MPIIO_SLOWEST_RANK] =
                rec_ref->file_rec->counters[MPIIO_FASTEST_RANK];
            rec_ref->file_rec->counters[MPIIO_SLOWEST_RANK_BYTES] =
                rec_ref->file_rec->counters[MPIIO_FASTEST_RANK_BYTES];
            rec_ref->file_rec->fcounters[MPIIO_F_SLOWEST_RANK_TIME] =
                rec_ref->file_rec->fcounters[MPIIO_F_FASTEST_RANK_TIME];

            rec_ref->file_rec->base_rec.rank = -1;
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        }

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        /* sort the array of records so we get all of the shared records
         * (marked by rank -1) in a contiguous portion at end of the array
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         */
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        darshan_record_sort(mpiio_rec_buf, mpiio_rec_count,
            sizeof(struct darshan_mpiio_file));
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        /* make send_buf point to the shared files at the end of sorted array */
        red_send_buf = &(mpiio_rec_buf[mpiio_rec_count-shared_rec_count]);
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        /* allocate memory for the reduction output on rank 0 */
        if(my_rank == 0)
        {
            red_recv_buf = malloc(shared_rec_count * sizeof(struct darshan_mpiio_file));
            if(!red_recv_buf)
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            {
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                MPIIO_UNLOCK();
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                return;
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            }
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        }

        /* construct a datatype for a MPIIO file record.  This is serving no purpose
         * except to make sure we can do a reduction on proper boundaries
         */
        DARSHAN_MPI_CALL(PMPI_Type_contiguous)(sizeof(struct darshan_mpiio_file),
            MPI_BYTE, &red_type);
        DARSHAN_MPI_CALL(PMPI_Type_commit)(&red_type);

        /* register a MPIIO file record reduction operator */
        DARSHAN_MPI_CALL(PMPI_Op_create)(mpiio_record_reduction_op, 1, &red_op);

        /* reduce shared MPIIO file records */
        DARSHAN_MPI_CALL(PMPI_Reduce)(red_send_buf, red_recv_buf,
            shared_rec_count, red_type, red_op, 0, mod_comm);

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        /* get the time and byte variances for shared files */
        mpiio_shared_record_variance(mod_comm, red_send_buf, red_recv_buf,
            shared_rec_count);

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        /* clean up reduction state */
        if(my_rank == 0)
        {
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            int tmp_ndx = mpiio_rec_count - shared_rec_count;
            memcpy(&(mpiio_rec_buf[tmp_ndx]), red_recv_buf,
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                shared_rec_count * sizeof(struct darshan_mpiio_file));
            free(red_recv_buf);
        }
        else
        {
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            mpiio_rec_count -= shared_rec_count;
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        }

        DARSHAN_MPI_CALL(PMPI_Type_free)(&red_type);
        DARSHAN_MPI_CALL(PMPI_Op_free)(&red_op);
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    }

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    *mpiio_buf_sz = mpiio_rec_count * sizeof(struct darshan_mpiio_file);
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    /* shutdown internal structures used for instrumenting */
    mpiio_cleanup_runtime();
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    MPIIO_UNLOCK();
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    return;
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}

Philip Carns's avatar
Philip Carns committed
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/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ts=8 sts=4 sw=4 expandtab
 */