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248 lines
7.1 KiB
C
248 lines
7.1 KiB
C
/*
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Copyright 2009, UCAR/Unidata
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See COPYRIGHT file for copying and redistribution conditions.
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This program tests netcdf-4 performance with some AR-4 3D data.
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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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/* 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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/* From the data file we are using:
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netcdf pr_A1.20C3M_8.CCSM.atmm.1870-01_cat_1999-12 {
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dimensions:
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lon = 256 ;
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lat = 128 ;
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bnds = 2 ;
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time = UNLIMITED ; // (1560 currently)
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variables:
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double lon_bnds(lon, bnds) ;
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double lat_bnds(lat, bnds) ;
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double time_bnds(time, bnds) ;
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double time(time) ;
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time:calendar = "noleap" ;
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time:standard_name = "time" ;
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time:axis = "T" ;
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time:units = "days since 0000-1-1" ;
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time:bounds = "time_bnds" ;
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time:long_name = "time" ;
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double lat(lat) ;
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lat:axis = "Y" ;
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lat:standard_name = "latitude" ;
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lat:bounds = "lat_bnds" ;
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lat:long_name = "latitude" ;
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lat:units = "degrees_north" ;
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double lon(lon) ;
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lon:axis = "X" ;
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lon:standard_name = "longitude" ;
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lon:bounds = "lon_bnds" ;
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lon:long_name = "longitude" ;
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lon:units = "degrees_east" ;
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float pr(time, lat, lon) ;
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pr:comment = "Created using NCL code CCSM_atmm_2cf.ncl on\n",
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" machine mineral" ;
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pr:missing_value = 1.e+20f ;
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pr:_FillValue = 1.e+20f ;
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pr:cell_methods = "time: mean (interval: 1 month)" ;
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pr:history = "(PRECC+PRECL)*r[h2o]" ;
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pr:original_units = "m-1 s-1" ;
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pr:original_name = "PRECC, PRECL" ;
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pr:standard_name = "precipitation_flux" ;
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pr:units = "kg m-2 s-1" ;
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pr:long_name = "precipitation_flux" ;
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pr:cell_method = "time: mean" ;
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*/
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#define USAGE "\
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[-v] Verbose\n\
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[-h] Print output header\n\
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[-t] Do a time-series read\n\
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[-c CACHE_SIZE] Set the HDF5 chunk cache to this size before read\n\
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file Name of netCDF file\n"
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static void
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usage(void)
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{
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fprintf(stderr, "tst_ar4 -v -h -t -c CACHE_SIZE file\n%s", USAGE);
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}
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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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int
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main(int argc, char **argv)
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{
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extern int optind;
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extern int opterr;
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extern char *optarg;
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int c, header = 0, verbose = 0, timeseries = 0;
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int ncid, varid, storage;
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char name_in[NC_MAX_NAME + 1];
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size_t len;
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size_t cs[NDIMS3] = {0, 0, 0};
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int cache = MEGABYTE;
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int ndims, dimid[NDIMS3];
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float hor_data[LAT_LEN * LON_LEN];
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int read_1_us, avg_read_us;
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float ts_data[TIME_LEN];
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size_t start[NDIMS3], count[NDIMS3];
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int deflate, shuffle, deflate_level;
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struct timeval start_time, end_time, diff_time;
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while ((c = getopt(argc, argv, "vhtc:")) != EOF)
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switch(c)
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{
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case 'v':
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verbose++;
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break;
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case 'h':
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header++;
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break;
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case 't':
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timeseries++;
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break;
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case 'c':
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sscanf(optarg, "%d", &cache);
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break;
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case '?':
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usage();
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return 1;
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}
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argc -= optind;
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argv += optind;
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/* If no file arguments left, report and exit */
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if (argc < 1)
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{
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printf("no file specified\n");
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return 0;
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}
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/* Print the header if desired. */
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if (header)
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{
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printf("cs[0]\tcs[1]\tcs[2]\tcache(MB)\tdeflate\tshuffle");
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if (timeseries)
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printf("\t1st_read_ser(us)\tavg_read_ser(us)\n");
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else
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printf("\t1st_read_hor(us)\tavg_read_hor(us)\n");
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}
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#define PREEMPTION .75
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/* Also tried NELEMS of 2500009*/
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#define NELEMS 7919
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if (nc_set_chunk_cache(cache, NELEMS, PREEMPTION)) ERR;
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if (nc_open(argv[0], 0, &ncid)) ERR;
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/* Check to make sure that all the dimension information is
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* correct. */
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if (nc_inq_varid(ncid, DATA_VAR_NAME, &varid)) ERR;
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if (nc_inq_dim(ncid, LON_DIMID, name_in, &len)) ERR;
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if (strcmp(name_in, "lon") || len != LON_LEN) ERR;
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if (nc_inq_dim(ncid, LAT_DIMID, name_in, &len)) ERR;
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if (strcmp(name_in, "lat") || len != LAT_LEN) ERR;
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if (nc_inq_dim(ncid, BNDS_DIMID, name_in, &len)) ERR;
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if (strcmp(name_in, "bnds") || len != BNDS_LEN) ERR;
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if (nc_inq_dim(ncid, TIME_DIMID, name_in, &len)) ERR;
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if (strcmp(name_in, "time") || len != TIME_LEN) ERR;
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if (nc_inq_var(ncid, varid, NULL, NULL, &ndims, dimid, NULL)) ERR;
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if (ndims != NDIMS3 || dimid[0] != TIME_DIMID ||
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dimid[1] != LAT_DIMID || dimid[2] != LON_DIMID) ERR;
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/* Get info about the main data var. */
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if (nc_inq_var_chunking(ncid, varid, &storage, cs)) ERR;
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if (nc_inq_var_deflate(ncid, varid, &shuffle, &deflate,
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&deflate_level)) ERR;
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if (timeseries)
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{
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/* Read the var as a time series. */
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start[0] = 0;
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start[1] = 0;
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start[2] = 0;
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count[0] = TIME_LEN;
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count[1] = 1;
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count[2] = 1;
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/* Read the first timeseries. */
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if (gettimeofday(&start_time, NULL)) ERR;
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if (nc_get_vara_float(ncid, varid, start, count, ts_data)) ERR_RET;
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if (gettimeofday(&end_time, NULL)) ERR;
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if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR;
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read_1_us = (int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec;
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/* Read all the rest. */
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if (gettimeofday(&start_time, NULL)) ERR;
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for (start[1] = 0; start[1] < LAT_LEN; start[1]++)
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for (start[2] = 1; start[2] < LON_LEN; start[2]++)
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if (nc_get_vara_float(ncid, varid, start, count, ts_data)) ERR_RET;
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if (gettimeofday(&end_time, NULL)) ERR;
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if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR;
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avg_read_us = ((int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec + read_1_us) /
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(LAT_LEN * LON_LEN);
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}
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else
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{
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/* Read the data variable in horizontal slices. */
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start[0] = 0;
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start[1] = 0;
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start[2] = 0;
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count[0] = 1;
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count[1] = LAT_LEN;
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count[2] = LON_LEN;
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/* Read (and time) the first one. */
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if (gettimeofday(&start_time, NULL)) ERR;
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if (nc_get_vara_float(ncid, varid, start, count, hor_data)) ERR_RET;
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if (gettimeofday(&end_time, NULL)) ERR;
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if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR;
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read_1_us = (int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec;
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/* Read (and time) all the rest. */
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if (gettimeofday(&start_time, NULL)) ERR;
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for (start[0] = 1; start[0] < TIME_LEN; start[0]++)
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if (nc_get_vara_float(ncid, varid, start, count, hor_data)) ERR_RET;
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if (gettimeofday(&end_time, NULL)) ERR;
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if (nc4_timeval_subtract(&diff_time, &end_time, &start_time)) ERR;
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avg_read_us = ((int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec +
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read_1_us) / TIME_LEN;
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}
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/* Close file. */
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if (nc_close(ncid)) ERR;
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/* Print results. */
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printf("%d\t%d\t%d\t%.1f\t\t%d\t%d\t\t",
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(int)cs[0], (int)cs[1], (int)cs[2],
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(storage == NC_CHUNKED) ? (cache/(float)MEGABYTE) : 0,
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deflate, shuffle);
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if (timeseries)
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printf("%d\t\t%d\n", (int)read_1_us, (int)avg_read_us);
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else
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printf("%d\t\t%d\n", (int)read_1_us, (int)avg_read_us);
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FINAL_RESULTS;
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}
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