mirror of
https://github.com/Unidata/netcdf-c.git
synced 2024-12-09 08:11:38 +08:00
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* This is part of the netCDF package. Copyright 2018 University
|
|
Corporation for Atmospheric Research/Unidata See COPYRIGHT file for
|
|
conditions of use. See www.unidata.ucar.edu for more info.
|
|
|
|
This program benchmarks creating a netCDF file with many objects.
|
|
|
|
Ed Hartnett
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <nc_tests.h>
|
|
#include "err_macros.h"
|
|
#include <netcdf.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <sys/time.h> /* Extra high precision time info. */
|
|
|
|
/* We will create this file. */
|
|
#define FILE_NAME "bm_many_objs.nc"
|
|
|
|
/* Prototype from tst_utils.c. */
|
|
int nc4_timeval_subtract(struct timeval *result, struct timeval *x,
|
|
struct timeval *y);
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct timeval start_time, end_time, diff_time;
|
|
double sec;
|
|
int nitem = 10000; /* default number of objects of each type */
|
|
int i;
|
|
int ncid;
|
|
int data[] = {42};
|
|
int g, grp, numgrp;
|
|
char gname[16];
|
|
int v, var, numvar, vn, vleft, nvars;
|
|
|
|
if(argc > 2) { /* Usage */
|
|
printf("NetCDF performance test, writing many groups and variables.\n");
|
|
printf("Usage:\t%s [N]\n", argv[0]);
|
|
printf("\tN: number of objects\n");
|
|
return(0);
|
|
}
|
|
for(i = 1; i < argc; i++) {
|
|
nitem = atoi(argv[i]);
|
|
}
|
|
|
|
/* create new file */
|
|
if (nc_create(FILE_NAME, NC_NETCDF4, &ncid)) ERR;
|
|
if (gettimeofday(&start_time, NULL))
|
|
ERR;
|
|
/* create N groups, printing time after every 1000 */
|
|
numgrp = nitem;
|
|
for(g = 1; g < numgrp + 1; g++) {
|
|
sprintf(gname, "group%d", g);
|
|
if (nc_def_grp(ncid, gname, &grp)) ERR;
|
|
if (nc_def_var(grp, "var", NC_INT, 0, NULL, &var)) ERR;
|
|
if(nc_enddef (grp)) ERR;
|
|
if(nc_put_var(grp, var, data)) ERR;
|
|
if(g%1000 == 0) { /* only print every 1000th group name */
|
|
if (gettimeofday(&end_time, NULL)) ERR;
|
|
if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR;
|
|
sec = diff_time.tv_sec + 1.0e-6 * diff_time.tv_usec;
|
|
printf("%s\t%.3g sec\n", gname, sec);
|
|
}
|
|
}
|
|
nc_close(ncid);
|
|
|
|
/* create new file */
|
|
if (nc_create(FILE_NAME, NC_NETCDF4, &ncid)) ERR;
|
|
/* create N variables, printing time after every 1000.
|
|
* Put NC_MAX_VARS variables per group (even though netcdf4 non-classic
|
|
* format does not limit variable count), create the necessary number
|
|
* of groups to hold nitem variables. */
|
|
numvar = nitem;
|
|
v = 1;
|
|
numgrp = (numvar - 1) / NC_MAX_VARS + 1;
|
|
vleft = numvar - (NC_MAX_VARS * (numgrp - 1));
|
|
if (gettimeofday(&start_time, NULL))
|
|
ERR;
|
|
|
|
for(g = 1; g < numgrp + 1; g++) {
|
|
sprintf(gname, "group%d", g);
|
|
if (nc_def_grp(ncid, gname, &grp)) ERR;
|
|
nvars = g < numgrp ? NC_MAX_VARS : vleft; /* leftovers on last time through */
|
|
for(vn = 1; vn < nvars + 1; vn++) {
|
|
int var;
|
|
char vname[20];
|
|
sprintf(vname, "variable%d", v);
|
|
if(nc_def_var(grp, vname, NC_INT, 0, NULL, &var)) ERR;
|
|
if(nc_put_var(grp, var, data)) ERR;
|
|
if(v%1000 == 0) { /* only print every 1000th variable name */
|
|
if (gettimeofday(&end_time, NULL)) ERR;
|
|
if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR;
|
|
sec = diff_time.tv_sec + 1.0e-6 * diff_time.tv_usec;
|
|
printf("%s/%s\t%.3g sec\n", gname, vname, sec);
|
|
}
|
|
v++;
|
|
}
|
|
}
|
|
nc_close(ncid);
|
|
FINAL_RESULTS;
|
|
}
|