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339 lines
10 KiB
C
339 lines
10 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 benchmark test which times how long it takes to create
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some files.
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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 <unistd.h>
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#include <time.h>
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#include <sys/time.h> /* Extra high precision time info. */
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#define MAX_LEN 30
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#define TMP_FILE_NAME "tst_files2_tmp.out"
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#define FILE_NAME "tst_files2_5_0.nc" /* One of the files created by first test. */
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#define MILLION 1000000
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void *last_sbrk;
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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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/* This function uses the ps command to find the amount of memory in
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use by the process. From the ps man page:
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size SZ approximate amount of swap space that would be required if
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the process were to dirty all writable pages and then be
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swapped out. This number is very rough!
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*/
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int
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get_mem_used1(int *mem_used)
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{
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char cmd[NC_MAX_NAME + 1];
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char blob[MAX_LEN + 1] = "";
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FILE *fp;
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/* Run the ps command for this process, putting output (one number)
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* into file TMP_FILE_NAME. */
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snprintf(cmd, sizeof(cmd), "ps -o size= %d > %s", getpid(), TMP_FILE_NAME);
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system(cmd);
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/* Read the results and delete temp file. */
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if (!(fp = NCfopen(TMP_FILE_NAME, "r"))) ERR;
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fread(blob, MAX_LEN, 1, fp);
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sscanf(blob, "%d", mem_used);
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fclose(fp);
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unlink(TMP_FILE_NAME);
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return NC_NOERR;
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}
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void
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get_mem_used2(int *mem_used)
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{
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char buf[30];
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FILE *pf;
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snprintf(buf, 30, "/proc/%u/statm", (unsigned)getpid());
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pf = NCfopen(buf, "r");
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if (pf) {
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unsigned size; /* total program size */
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unsigned resident;/* resident set size */
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unsigned share;/* shared pages */
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unsigned text;/* text (code) */
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unsigned lib;/* library */
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unsigned data;/* data/stack */
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/*unsigned dt; dirty pages (unused in Linux 2.6)*/
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fscanf(pf, "%u %u %u %u %u %u", &size, &resident, &share,
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&text, &lib, &data);
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*mem_used = data;
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}
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else
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*mem_used = -1;
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fclose(pf);
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}
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void
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get_mem_used3(int *mem_used)
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{
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void *vp;
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vp = sbrk(0);
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*mem_used = ((char *)vp - (char *)last_sbrk)/1024;
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}
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/* Create a sample file, with num_vars 3D or 4D variables, with dim
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* lens of dim_len size. */
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#define MAX_DIMS 4
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int
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create_sample_file(char *file_name, int ndims, int *dim_len,
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int num_vars, int mode, int num_recs)
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{
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int ncid, dimids[MAX_DIMS], *varids;
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char varname[NC_MAX_NAME + 1];
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char dim_name[NC_MAX_NAME + 1];
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float *data_out;
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size_t start[MAX_DIMS], count[MAX_DIMS];
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int slab_nelems;
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int i, d;
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if (ndims != MAX_DIMS && ndims != MAX_DIMS - 1) ERR_RET;
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/* Create a file. */
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if (nc_create(file_name, NC_CLOBBER|mode, &ncid)) ERR_RET;
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/* Initialize sample data. Slab of data will be full extent of last
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* two dimensions. */
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slab_nelems = dim_len[ndims - 1] * dim_len[ndims - 2];
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if (!(data_out = malloc(slab_nelems * sizeof(float)))) ERR_RET;
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for (i = 0; i < slab_nelems; i++)
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data_out[i] = 42.42 + i;
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/* Create the dimensions. */
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for (d = 0; d < ndims; d++)
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{
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snprintf(dim_name, sizeof(dim_name), "dim_%d", d);
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if (nc_def_dim(ncid, dim_name, dim_len[d], &dimids[d])) ERR_RET;
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}
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/* Define num_vars variables. */
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if (!(varids = malloc(num_vars * sizeof(int)))) ERR_RET;
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for (i = 0; i < num_vars; i++)
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{
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snprintf(varname, sizeof(varname), "a_%d", i);
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if (nc_def_var(ncid, varname, NC_FLOAT, ndims, dimids,
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&varids[i])) ERR_RET;
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}
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/* Enddef required for classic files. */
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if (nc_enddef(ncid)) ERR;
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/* Set up start/count to write slabs of data. */
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for (d = 0; d < ndims; d++)
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{
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if (d < ndims - 2)
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count[d] = 1;
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else
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{
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start[d] = 0;
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count[d] = dim_len[d];
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}
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}
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/* Now write some data to the vars in slabs. */
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for (i = 0; i < num_vars; i++)
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{
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if (ndims == MAX_DIMS)
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{
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for (start[0] = 0; start[0] < (dim_len[0] ? dim_len[0] : num_recs); start[0]++)
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for (start[1] = 0; start[1] < dim_len[1]; start[1]++)
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if (nc_put_vara_float(ncid, varids[i], start, count,
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data_out)) ERR_RET;
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}
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else
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{
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for (start[0] = 0; start[0] < (dim_len[0] ? dim_len[0] : num_recs); start[0]++)
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if (nc_put_vara_float(ncid, varids[i], start, count,
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data_out)) ERR_RET;
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}
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}
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/* Free data and close file. */
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free(data_out);
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free(varids);
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if (nc_close(ncid)) ERR_RET;
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return NC_NOERR;
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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 file functions, some more.\n");
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last_sbrk = sbrk(0);
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printf("*** testing lots of open files...\n");
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{
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#define NUM_TRIES 6
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int *ncid_in;
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int mem_used, mem_used2;
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/* int mem_per_file; */
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int num_files[NUM_TRIES] = {1, 5, 10, 20, 35, 50};
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char file_name[NUM_TRIES][NC_MAX_NAME + 1];
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int num_vars[NUM_TRIES];
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size_t cache_size[NUM_TRIES];
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int mode[NUM_TRIES];
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char mode_name[NUM_TRIES][8];
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int ndims[NUM_TRIES];
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int dim_len[NUM_TRIES][MAX_DIMS];
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int dim_4d[MAX_DIMS] = {NC_UNLIMITED, 10, 100, 100};
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char dimstr[30];
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char chunkstr[30];
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int num_recs[NUM_TRIES] = {1, 1, 1, 1, 1, 1};
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struct timeval start_time, end_time, diff_time;
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struct timeval close_start_time, close_end_time, close_diff_time;
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int open_us, close_us, create_us;
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size_t chunksize[MAX_DIMS];
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int storage;
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int d, f, t;
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printf("dims\t\tchunks\t\tformat\tnum_files\tcache(kb)\tnum_vars\tmem(kb)\t"
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"open_time(us/file)\tclose_time(us/file)\tcreate_time(us/file)\n");
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for (t = 0; t < NUM_TRIES; t++)
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{
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strcpy(mode_name[t], "netcdf4");
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mode[t] = NC_NETCDF4;
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cache_size[t] = 16000000;
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num_vars[t] = 10;
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ndims[t] = 4;
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for (d = 0; d < ndims[t]; d++)
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dim_len[t][d] = dim_4d[d];
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/* Create sample files. */
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if (gettimeofday(&start_time, NULL)) ERR;
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for (f = 0; f < num_files[t]; f++)
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{
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/* Set up filename. */
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snprintf(file_name[t], sizeof(file_name[t]), "tst_files2_%d_%d.nc", t, f);
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if (create_sample_file(file_name[t], ndims[t], dim_len[t], num_vars[t],
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mode[t], num_recs[t])) ERR;
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/* How long did it take? */
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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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create_us = ((int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec) / num_files[t];
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}
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/* /\* Change the cache settings. *\/ */
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/* if (nc_set_chunk_cache(cache_size[t], 20000, .75)) ERR; */
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/* We need storage for an array of ncids. */
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if (!(ncid_in = malloc(num_files[t] * sizeof(int)))) ERR;
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/* How much memory is in use now? */
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if (get_mem_used1(&mem_used)) ERR;
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/* Open the first file to get chunksizes. */
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if (gettimeofday(&start_time, NULL)) ERR;
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if (nc_open(file_name[t], 0, &ncid_in[0])) ERR;
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if (nc_inq_var_chunking(ncid_in[0], 0, &storage, chunksize)) ERR;
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/* Now reopen this file a large number of times. */
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for (f = 1; f < num_files[t]; f++)
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if (nc_open(file_name[t], 0, &ncid_in[f])) ERR_RET;
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/* How long did it take per file? */
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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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open_us = ((int)diff_time.tv_sec * MILLION + (int)diff_time.tv_usec) / num_files[t];
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/* How much memory is in use by this process now? */
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if (get_mem_used1(&mem_used2)) ERR;
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/* Close all netcdf files. */
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if (gettimeofday(&close_start_time, NULL)) ERR;
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for (f = 0; f < num_files[t]; f++)
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if (nc_close(ncid_in[f])) ERR_RET;
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/* How long did it take to close all files? */
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if (gettimeofday(&close_end_time, NULL)) ERR;
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if (nc4_timeval_subtract(&close_diff_time, &close_end_time, &close_start_time)) ERR;
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close_us = ((int)close_diff_time.tv_sec * MILLION +
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(int)close_diff_time.tv_usec) / num_files[t];
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/* We're done with this. */
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free(ncid_in);
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/* How much memory was used for each open file? */
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/* mem_per_file = mem_used2/num_files[t]; */
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/* Prepare the dimensions string. */
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if (ndims[t] == MAX_DIMS)
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snprintf(dimstr, sizeof(dimstr), "%dx%dx%dx%d", dim_len[t][0], dim_len[t][1],
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dim_len[t][2], dim_len[t][3]);
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else
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snprintf(dimstr, sizeof(dimstr), "%dx%dx%d", dim_len[t][0], dim_len[t][1],
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dim_len[t][2]);
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/* Prepare the chunksize string. */
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if (storage == NC_CHUNKED)
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{
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if (ndims[t] == MAX_DIMS)
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snprintf(chunkstr, sizeof(chunkstr), "%dx%dx%dx%d", (int)chunksize[0], (int)chunksize[1],
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(int)chunksize[2], (int)chunksize[3]);
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else
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snprintf(chunkstr, sizeof(chunkstr), "%dx%dx%d", (int)chunksize[0], (int)chunksize[1],
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(int)chunksize[2]);
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}
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else
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strcpy(chunkstr, "contig ");
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/* Output results. */
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printf("%s\t%s\t%s\t%d\t\t%d\t\t%d\t\t%d\t\t%d\t\t%d\t\t%d\n",
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dimstr, chunkstr, mode_name[t], num_files[t], (int)(cache_size[t]/1024),
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num_vars[t], mem_used2, open_us, close_us, create_us);
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}
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}
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SUMMARIZE_ERR;
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printf("Test for memory consumption...\n");
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{
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#define NUM_TRIES_100 100
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int ncid, i;
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int mem_used, mem_used1, mem_used2;
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get_mem_used2(&mem_used);
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mem_used1 = mem_used;
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mem_used2 = mem_used;
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printf("start: memuse= %d\t%d\t%d \n",mem_used, mem_used1,
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mem_used2);
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printf("bef_open\taft_open\taft_close\tused_open\tused_closed\n");
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for (i=0; i < NUM_TRIES_100; i++)
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{
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/* Open the file. NC_NOWRITE tells netCDF we want read-only access
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* to the file.*/
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get_mem_used2(&mem_used);
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nc_set_chunk_cache(10,10,.5);
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if (nc_open(FILE_NAME, NC_NOWRITE, &ncid)) ERR;
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get_mem_used2(&mem_used1);
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/* Close the file, freeing all resources. ???? */
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if (nc_close(ncid)) ERR;
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get_mem_used2(&mem_used2);
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if (mem_used2 - mem_used)
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printf("try %d - %d\t\t%d\t\t%d\t\t%d\t\t%d \n", i,
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mem_used, mem_used1, mem_used2, mem_used1 - mem_used,
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mem_used2 - mem_used);
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}
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}
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SUMMARIZE_ERR;
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FINAL_RESULTS;
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}
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