+/* A crash few tests for the maxmin library */
+
+/* Authors: Arnaud Legrand */
+
+/* This program is free software; you can redistribute it and/or modify it
+ under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "surf/maxmin.h"
+#include <sys/time.h>
+
+long date;
+
+/* Pour le bench */
+long us_time(void);
+long us_time(void)
+{
+ struct timeval start;
+ gettimeofday(&start, NULL);
+
+ return (start.tv_sec * 1000000 + start.tv_usec);
+}
+
+
+xbt_maxmin_float_t float_random(xbt_maxmin_float_t max);
+xbt_maxmin_float_t float_random(xbt_maxmin_float_t max)
+{
+ return ((max * rand()) / (RAND_MAX + 1.0));
+}
+
+int int_random(int max);
+int int_random(int max)
+{
+ return (int) (((max * 1.0) * rand()) / (RAND_MAX + 1.0));
+}
+
+void test(int nb_cnst, int nb_var, int nb_elem);
+void test(int nb_cnst, int nb_var, int nb_elem)
+{
+ lmm_system_t Sys = NULL;
+ lmm_constraint_t *cnst = calloc(nb_cnst, sizeof(lmm_constraint_t));
+ lmm_variable_t *var = calloc(nb_var, sizeof(lmm_variable_t));
+ int *used = calloc(nb_cnst, sizeof(int));
+ int i, j, k;
+
+ Sys = lmm_system_new();
+
+ for (i = 0; i < nb_cnst; i++) {
+ cnst[i] = lmm_constraint_new(Sys, NULL, float_random(10.0));
+ }
+
+ for (i = 0; i < nb_var; i++) {
+ var[i] = lmm_variable_new(Sys, NULL, 1.0, -1.0, nb_elem);
+ for (j = 0; j < nb_cnst; j++)
+ used[j] = 0;
+ for (j = 0; j < nb_elem; j++) {
+ k = int_random(nb_cnst);
+ if (used[k]) {
+ j--;
+ continue;
+ }
+ lmm_expand(Sys, cnst[k], var[i], float_random(1.0));
+ used[k] = 1;
+ }
+ }
+
+ date = us_time();
+ lmm_solve(Sys);
+ date = us_time() - date;
+
+ lmm_system_free(Sys);
+ free(cnst);
+ free(var);
+ free(used);
+}
+
+
+int main(int argc, char **argv)
+{
+ int nb_cnst = 2000;
+ int nb_var = 2000;
+ int nb_elem = 20;
+ date = us_time();
+ test(nb_cnst, nb_var, nb_elem);
+ printf("One shot execution time for a total of %d constraints, "
+ "%d variables with %d active constraint each : %ld microsecondes \n",
+ nb_cnst, nb_var, nb_elem, date);
+ return 0;
+}