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93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* This is part of the netCDF package. Copyright 2005-2018 University
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Corporation for Atmospheric Research/Unidata See COPYRIGHT file for
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conditions of use.
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This is a benchmarking program that depends on some KNMI files from
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the Unidata ftp site. The files are opened and read, and
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performance is timed.
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Ed Hartnett
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*/
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#include <nc_tests.h>
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#include "err_macros.h"
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#include <time.h>
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#include <sys/time.h>
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#include <unistd.h>
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#define FILE_NAME_1 "MSGCPP_CWP_NC3.nc"
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#define FILE_NAME_2 "MSGCPP_CWP_NC4.nc"
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#define NDIMS3 3
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#define DATA_VAR_NAME "pr"
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#define NUM_CACHE_TRIES 1
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#define LON_DIMID 0
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#define LAT_DIMID 1
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#define BNDS_DIMID 2
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#define TIME_DIMID 3
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#define LON_LEN 256
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#define LAT_LEN 128
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#define BNDS_LEN 2
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#define TIME_LEN 1560
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#define NUM_TS 1
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/* Prototype from tst_utils.c. */
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int nc4_timeval_subtract(struct timeval *result, struct timeval *x,
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struct timeval *y);
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extern const char* nc_strerror(int ncerr);
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static int
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complain(int stat)
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{
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if(stat) {
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fprintf(stderr,"%s\n",nc_strerror(stat));
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fflush(stderr);
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}
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return stat;
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}
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static int
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read_file(char *filename)
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{
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#define CWP "cwp"
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#define XLEN 3712
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#define YLEN 3712
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int ncid, varid;
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struct timeval start_time, end_time, diff_time;
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short *data;
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int time_us;
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printf("**** reading file %s\n", filename);
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if (gettimeofday(&start_time, NULL)) ERR_RET;
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if(complain(nc_open(filename, NC_NOWRITE, &ncid))) ERR_RET;
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if (gettimeofday(&end_time, NULL)) ERR_RET;
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if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR_RET;
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time_us = (int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec;
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printf("File open time (us): %d\n", (int)time_us);
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if (!(data = malloc(sizeof(short) * XLEN * YLEN))) ERR;
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if (gettimeofday(&start_time, NULL)) ERR_RET;
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if (nc_inq_varid(ncid, CWP, &varid)) ERR;
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if (nc_get_var_short(ncid, varid, data)) ERR;
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if (gettimeofday(&end_time, NULL)) ERR_RET;
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if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR_RET;
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time_us = (int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec;
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printf("Data read time (us): %d\n", (int)time_us);
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free(data);
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if (nc_close(ncid))
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ERR_RET;
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return 0;
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}
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int
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main(int argc, char **argv)
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{
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printf("\n*** Testing netcdf-4 vs. netcdf-3 performance.\n");
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if (complain(read_file(FILE_NAME_1))) ERR;
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if (complain(read_file(FILE_NAME_2))) ERR;
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SUMMARIZE_ERR;
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FINAL_RESULTS;
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}
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