tools/tests/libMicro/recurse.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms
   5  * of the Common Development and Distribution License
   6  * (the "License").  You may not use this file except
   7  * in compliance with the License.
   8  *
   9  * You can obtain a copy of the license at
  10  * src/OPENSOLARIS.LICENSE
  11  * or http://www.opensolaris.org/os/licensing.
  12  * See the License for the specific language governing
  13  * permissions and limitations under the License.
  14  *
  15  * When distributing Covered Code, include this CDDL
  16  * HEADER in each file and include the License file at
  17  * usr/src/OPENSOLARIS.LICENSE.  If applicable,
  18  * add the following below this CDDL HEADER, with the
  19  * fields enclosed by brackets "[]" replaced with your
  20  * own identifying information: Portions Copyright [yyyy]
  21  * [name of copyright owner]
  22  *
  23  * CDDL HEADER END
  24  */
  25
  26 /*
  27  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #include "libmicro.h"
  38
  39 #define DEFD            100
  40
  41 static int                      optd = DEFD;
  42
  43 int recurse2(int x, int y, char *s);
  44
  45 /*ARGSUSED*/
  46 int
  47 recurse1(int x, int y, char *s)
  48 {
  49         char                    str[32];
  50
  51         if (x < y) {
  52                 return (recurse2(x + 1, y, str));
  53         }
  54
  55         return (x);
  56 }
  57
  58 int
  59 benchmark_init()
  60 {
  61         lm_tsdsize = 0;
  62
  63         (void) sprintf(lm_optstr, "d:");
  64
  65         (void) sprintf(lm_usage,
  66             "       [-d depth-limit (default = %d)]\n"
  67             "notes: measures recursion performance\n",
  68             DEFD);
  69
  70         return (0);
  71 }
  72
  73 int
  74 benchmark_optswitch(int opt, char *optarg)
  75 {
  76         switch (opt) {
  77         case 'd':
  78                 optd = atoi(optarg);
  79                 break;
  80         default:
  81                 return (-1);
  82         }
  83         return (0);
  84 }
  85
  86 /*ARGSUSED*/
  87 int
  88 benchmark(void *tsd, result_t *res)
  89 {
  90         int                     i;
  91
  92         for (i = 0; i < lm_optB; i++) {
  93                 (void) recurse1(0, optd, NULL);
  94         }
  95         res->re_count = i;
  96
  97         return (0);
  98 }