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/*********************************************************************
*
* Copyright (C) 2012, Northwestern University and Argonne National Laboratory
* See COPYRIGHT notice in top-level directory.
*
*********************************************************************/
/* $Id$ */
/*
* prints all MPI-IO hints used
* To compile:
* mpicc -O2 get_info.c -o get_info -lpnetcdf
* To run:
* mpiexec -n 4 ./get_info [filename]
*
* Example standard output:
MPI File Info: nkeys = 34
MPI File Info: [ 0] key = cb_buffer_size, value = 16777216
MPI File Info: [ 1] key = romio_cb_read, value = automatic
MPI File Info: [ 2] key = romio_cb_write, value = automatic
MPI File Info: [ 3] key = cb_nodes, value = 1
MPI File Info: [ 4] key = romio_no_indep_rw, value = false
MPI File Info: [ 5] key = romio_cb_pfr, value = disable
MPI File Info: [ 6] key = romio_cb_fr_types, value = aar
MPI File Info: [ 7] key = romio_cb_fr_alignment, value = 1
MPI File Info: [ 8] key = romio_cb_ds_threshold, value = 0
MPI File Info: [ 9] key = romio_cb_alltoall, value = automatic
MPI File Info: [10] key = ind_rd_buffer_size, value = 4194304
MPI File Info: [11] key = ind_wr_buffer_size, value = 524288
MPI File Info: [12] key = romio_ds_read, value = automatic
MPI File Info: [13] key = romio_ds_write, value = automatic
MPI File Info: [14] key = romio_synchronized_flush, value = disabled
MPI File Info: [15] key = romio_visibility_immediate, value = true
MPI File Info: [16] key = cb_config_list, value = *:1
MPI File Info: [17] key = romio_filesystem_type, value = UFS: Generic ROMIO driver for all UNIX-like file systems
MPI File Info: [18] key = mpi_memory_alloc_kinds, value = mpi,system
MPI File Info: [19] key = romio_aggregator_list, value = 0
MPI File Info: [20] key = striping_unit, value = 0
MPI File Info: [21] key = striping_factor, value = 0
MPI File Info: [22] key = start_iodevice, value = 0
MPI File Info: [23] key = nc_var_align_size, value = 4
MPI File Info: [24] key = nc_record_align_size, value = 4
MPI File Info: [25] key = nc_header_read_chunk_size, value = 262144
MPI File Info: [26] key = nc_in_place_swap, value = auto
MPI File Info: [27] key = nc_ibuf_size, value = 16777216
MPI File Info: [28] key = pnetcdf_subfiling, value = disable
MPI File Info: [29] key = nc_num_subfiles, value = 0
MPI File Info: [30] key = nc_hash_size_dim, value = 256
MPI File Info: [31] key = nc_hash_size_var, value = 256
MPI File Info: [32] key = nc_hash_size_gattr, value = 64
MPI File Info: [33] key = nc_hash_size_vattr, value = 8
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h> /* strcpy(), strncpy() */
#include <unistd.h> /* getopt() */
#include <mpi.h>
#include <pnetcdf.h>
static int verbose;
#define ERR {if(err!=NC_NOERR){printf("Error at %s:%d : %s\n", __FILE__,__LINE__, ncmpi_strerror(err));nerrs++;}}
static void
usage(char *argv0)
{
char *help =
"Usage: %s [-h] | [-q] [file_name]\n"
" [-h] Print help\n"
" [-q] Quiet mode (reports when fail)\n"
" [filename] output netCDF file name\n";
fprintf(stderr, help, argv0);
}
/*----< pnetcdf_check_mem_usage() >------------------------------------------*/
/* check PnetCDF library internal memory usage */
static int
pnetcdf_check_mem_usage(MPI_Comm comm)
{
int err, nerrs=0, rank;
MPI_Offset malloc_size, sum_size;
MPI_Comm_rank(comm, &rank);
/* print info about PnetCDF internal malloc usage */
err = ncmpi_inq_malloc_max_size(&malloc_size);
if (err == NC_NOERR) {
MPI_Reduce(&malloc_size, &sum_size, 1, MPI_OFFSET, MPI_SUM, 0, MPI_COMM_WORLD);
if (rank == 0 && verbose)
printf("maximum heap memory allocated by PnetCDF internally is %lld bytes\n",
sum_size);
/* check if there is any PnetCDF internal malloc residue */
err = ncmpi_inq_malloc_size(&malloc_size);
MPI_Reduce(&malloc_size, &sum_size, 1, MPI_OFFSET, MPI_SUM, 0, MPI_COMM_WORLD);
if (rank == 0 && sum_size > 0)
printf("heap memory allocated by PnetCDF internally has %lld bytes yet to be freed\n",
sum_size);
}
else if (err != NC_ENOTENABLED) {
printf("Error at %s:%d: %s\n", __FILE__,__LINE__,ncmpi_strerror(err));
nerrs++;
}
return nerrs;
}
/*----< print_info() >------------------------------------------------------*/
static
void print_info(MPI_Info *info_used)
{
int i, nkeys;
MPI_Info_get_nkeys(*info_used, &nkeys);
printf("MPI File Info: nkeys = %d\n",nkeys);
for (i=0; i<nkeys; i++) {
char key[MPI_MAX_INFO_KEY], value[MPI_MAX_INFO_VAL];
int valuelen, flag;
MPI_Info_get_nthkey(*info_used, i, key);
MPI_Info_get_valuelen(*info_used, key, &valuelen, &flag);
MPI_Info_get(*info_used, key, valuelen+1, value, &flag);
printf("MPI File Info: [%2d] key = %25s, value = %s\n",i,key,value);
}
}
/*----< main() >------------------------------------------------------------*/
int main(int argc, char **argv)
{
extern int optind;
char filename[256];
int i, rank, ncid, err, nerrs=0;
MPI_Info info_used;
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
verbose = 1;
/* get command-line arguments */
while ((i = getopt(argc, argv, "hq")) != EOF)
switch(i) {
case 'q': verbose = 0;
break;
case 'h':
default: if (rank==0) usage(argv[0]);
MPI_Finalize();
return 1;
}
if (argv[optind] == NULL) strcpy(filename, "testfile.nc");
else snprintf(filename, 256, "%s", argv[optind]);
/* create the file */
err = ncmpi_create(MPI_COMM_WORLD, filename, NC_CLOBBER|NC_64BIT_DATA,
MPI_INFO_NULL, &ncid);
if (err != NC_NOERR) {
ERR
MPI_Abort(MPI_COMM_WORLD, -1);
exit(1);
}
/* exit the define mode */
err = ncmpi_enddef(ncid);
ERR
/* get all the hints used */
err = ncmpi_inq_file_info(ncid, &info_used);
ERR
/* close the file */
err = ncmpi_close(ncid);
ERR
if (rank == 0 && verbose) print_info(&info_used);
MPI_Info_free(&info_used);
nerrs += pnetcdf_check_mem_usage(MPI_COMM_WORLD);
MPI_Finalize();
return (nerrs > 0);
}
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