ctdb/tests/src/rb_perftest.c

   1 /*
   2    simple rb vs dlist benchmark
   3
   4    Copyright (C) Ronnie Sahlberg 2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "lib/events/events.h"
  22 #include "lib/util/dlinklist.h"
  23 #include "system/filesys.h"
  24 #include "popt.h"
  25 #include "cmdline.h"
  26
  27 #include <sys/time.h>
  28 #include <time.h>
  29 #include "common/rb_tree.h"
  30
  31 static struct timeval tp1,tp2;
  32
  33 static void start_timer(void)
  34 {
  35         gettimeofday(&tp1,NULL);
  36 }
  37
  38 static double end_timer(void)
  39 {
  40         gettimeofday(&tp2,NULL);
  41         return (tp2.tv_sec + (tp2.tv_usec*1.0e-6)) -
  42                 (tp1.tv_sec + (tp1.tv_usec*1.0e-6));
  43 }
  44
  45
  46 static int num_records = 1000;
  47
  48
  49 struct list_node {
  50         struct list_node *prev, *next;
  51 };
  52
  53 /*
  54   main program
  55 */
  56 int main(int argc, const char *argv[])
  57 {
  58         struct poptOption popt_options[] = {
  59                 POPT_AUTOHELP
  60                 POPT_CTDB_CMDLINE
  61                 { "num-records", 'r', POPT_ARG_INT, &num_records, 0, "num_records", "integer" },
  62                 POPT_TABLEEND
  63         };
  64         int opt;
  65         const char **extra_argv;
  66         int extra_argc = 0;
  67         int ret;
  68         poptContext pc;
  69         struct event_context *ev;
  70         double elapsed;
  71         int i;
  72         trbt_tree_t *tree;
  73         struct list_node *list, *list_new, *list_head=NULL;
  74
  75         pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
  76
  77         while ((opt = poptGetNextOpt(pc)) != -1) {
  78                 switch (opt) {
  79                 default:
  80                         fprintf(stderr, "Invalid option %s: %s\n",
  81                                 poptBadOption(pc, 0), poptStrerror(opt));
  82                         exit(1);
  83                 }
  84         }
  85
  86         /* setup the remaining options for the main program to use */
  87         extra_argv = poptGetArgs(pc);
  88         if (extra_argv) {
  89                 extra_argv++;
  90                 while (extra_argv[extra_argc]) extra_argc++;
  91         }
  92
  93         ev = event_context_init(NULL);
  94
  95
  96         printf("testing tree insert for %d records\n", num_records);
  97         tree = trbt_create(NULL);
  98         start_timer();
  99         for (i=0;i<num_records;i++) {
 100                 trbt_insert32(tree, i, NULL);
 101         }
 102         elapsed=end_timer();
 103         printf("%f seconds\n",(float)elapsed);
 104
 105
 106         printf("testing dlist (worst case) add to tail for %d records\n", num_records);
 107         list_new=talloc(NULL, struct list_node);
 108         DLIST_ADD(list_head, list_new);
 109         start_timer();
 110         for (i=0;i<num_records;i++) {
 111                 for(list=list_head;list->next;list=list->next) {
 112                         /* the events code does a timeval_compare */
 113                         timeval_compare(&tp1, &tp2);
 114                 }
 115
 116                 list_new=talloc(NULL, struct list_node);
 117                 DLIST_ADD_AFTER(list_head, list_new, list);
 118         }
 119         elapsed=end_timer();
 120         printf("%f seconds\n",(float)elapsed);
 121
 122         return 0;
 123 }