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75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
#include "geostat.h"
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#include <math.h>
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#include <stdlib.h>
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#include <time.h>
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#include "log.h"
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#include "memory.h"
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/* GENERATION OF A GAUSSIAN WHITE NOISE VECTOR */
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/*input: */
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/* seed: seed */
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/* n: number of components in the vector */
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/*output: */
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/* realization: structure defining the realization*/
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void generate(long* seed, int n, struct realization_mod* realization, int cores) {
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double* used_ram_t0 = malloc(sizeof(double));
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getVirtualMemUsed(used_ram_t0);
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log_info("RESULT = in progress, n = %d", n);
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struct cpustat initial[cores];
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struct cpustat final[cores];
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for (int i = 0; i < cores; i++) {
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get_stats(&initial[i], i - 1);
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}
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clock_t t = clock();
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int i;
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long idum2 = 123456789, iy = 0;
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long* iv;
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int iset = 0;
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iv = (long*)malloc(NTAB * sizeof(long));
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/*negative seed*/
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if (*seed > 0.0)
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*seed = -(*seed);
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/*realization definition*/
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(*realization).n = n;
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(*realization).code = 0;
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(*realization).vector = (double*)malloc(n * sizeof(double));
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if ((*realization).vector == NULL) {
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log_error("RESULT = failed - No memory available in generate");
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exit;
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}
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/*Gaussian white noise generation*/
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for (i = 0; i < n; i++)
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(*realization).vector[i] = gasdev(seed, &idum2, &iy, iv);
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t = clock() - t;
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double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
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for (int i = 0; i < cores; i++) {
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get_stats(&final[i], i - 1);
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}
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for (int i = 0; i < cores; i++) {
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log_info("CPU %d: %lf%%\n", i, calculate_load(&initial[i], &final[i]));
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}
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double* used_ram_tf = malloc(sizeof(double));
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getVirtualMemUsed(used_ram_tf);
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free(iv);
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log_info("RESULT = success, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
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free(used_ram_t0);
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free(used_ram_tf);
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}
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