benchtests/bench-strsep.c

   1 /* Measure strsep functions.
   2    Copyright (C) 2013-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #define TEST_MAIN
  20 #define TEST_NAME "strsep"
  21 #include "bench-string.h"
  22
  23 char *
  24 simple_strsep (char **s1, char *s2)
  25 {
  26   char *begin;
  27   char *s;
  28   size_t j = 0;
  29
  30   begin = *s1;
  31   s = begin;
  32   if (begin == NULL)
  33     return NULL;
  34   ssize_t s2len = strlen (s2);
  35   while (*s)
  36     {
  37       for (j = 0; j < s2len; j++)
  38         {
  39           if (*s == s2[j])
  40             {
  41               s[0] = '\0';
  42               *s1 = s + 1;
  43               return begin;
  44             }
  45         }
  46       s++;
  47     }
  48   *s1 = NULL;
  49   return begin;
  50 }
  51
  52 typedef char *(*proto_t) (const char **, const char *);
  53
  54 IMPL (simple_strsep, 0)
  55 IMPL (strsep, 1)
  56
  57 static void
  58 do_one_test (impl_t * impl, const char *s1, const char *s2)
  59 {
  60   size_t i, iters = INNER_LOOP_ITERS;
  61   timing_t start, stop, cur;
  62
  63   TIMING_NOW (start);
  64   for (i = 0; i < iters; ++i)
  65     {
  66       CALL (impl, &s1, s2);
  67     }
  68   TIMING_NOW (stop);
  69
  70   TIMING_DIFF (cur, start, stop);
  71
  72   TIMING_PRINT_MEAN ((double) cur, (double) iters);
  73 }
  74
  75 static void
  76 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int fail)
  77 {
  78   char *s2 = (char *) (buf2 + align2);
  79   static const char d[] = "1234567890abcdef";
  80 #define dl (sizeof (d) - 1)
  81   char *ss2 = s2;
  82   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
  83     {
  84       size_t t = l > dl ? dl : l;
  85       ss2 = mempcpy (ss2, d, t);
  86     }
  87   s2[len2] = '\0';
  88
  89   printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
  90           len1, len2, align1, align2, fail ? "fail" : "found");
  91
  92   FOR_EACH_IMPL (impl, 0)
  93   {
  94     char *s1 = (char *) (buf1 + align1);
  95     if (fail)
  96       {
  97         char *ss1 = s1;
  98         for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
  99           {
 100             size_t t = l > dl ? dl : l;
 101             memcpy (ss1, d, t);
 102             ++ss1[len2 > 7 ? 7 : len2 - 1];
 103             ss1 += t;
 104           }
 105       }
 106     else
 107       {
 108         memset (s1, '0', len1);
 109         memcpy (s1 + (len1 - len2) - 2, s2, len2);
 110         if ((len1 / len2) > 4)
 111           memcpy (s1 + (len1 - len2) - (3 * len2), s2, len2);
 112       }
 113     s1[len1] = '\0';
 114     do_one_test (impl, s1, s2);
 115   }
 116   putchar ('\n');
 117 }
 118
 119 static int
 120 test_main (void)
 121 {
 122   test_init ();
 123
 124   printf ("%23s", "");
 125   FOR_EACH_IMPL (impl, 0)
 126     printf ("\t%s", impl->name);
 127   putchar ('\n');
 128
 129   for (size_t klen = 2; klen < 32; ++klen)
 130     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 131       {
 132         do_test (0, 0, hlen, klen, 0);
 133         do_test (0, 0, hlen, klen, 1);
 134         do_test (0, 3, hlen, klen, 0);
 135         do_test (0, 3, hlen, klen, 1);
 136         do_test (0, 9, hlen, klen, 0);
 137         do_test (0, 9, hlen, klen, 1);
 138         do_test (0, 15, hlen, klen, 0);
 139         do_test (0, 15, hlen, klen, 1);
 140
 141         do_test (3, 0, hlen, klen, 0);
 142         do_test (3, 0, hlen, klen, 1);
 143         do_test (3, 3, hlen, klen, 0);
 144         do_test (3, 3, hlen, klen, 1);
 145         do_test (3, 9, hlen, klen, 0);
 146         do_test (3, 9, hlen, klen, 1);
 147         do_test (3, 15, hlen, klen, 0);
 148         do_test (3, 15, hlen, klen, 1);
 149
 150         do_test (9, 0, hlen, klen, 0);
 151         do_test (9, 0, hlen, klen, 1);
 152         do_test (9, 3, hlen, klen, 0);
 153         do_test (9, 3, hlen, klen, 1);
 154         do_test (9, 9, hlen, klen, 0);
 155         do_test (9, 9, hlen, klen, 1);
 156         do_test (9, 15, hlen, klen, 0);
 157         do_test (9, 15, hlen, klen, 1);
 158
 159         do_test (15, 0, hlen, klen, 0);
 160         do_test (15, 0, hlen, klen, 1);
 161         do_test (15, 3, hlen, klen, 0);
 162         do_test (15, 3, hlen, klen, 1);
 163         do_test (15, 9, hlen, klen, 0);
 164         do_test (15, 9, hlen, klen, 1);
 165         do_test (15, 15, hlen, klen, 0);
 166         do_test (15, 15, hlen, klen, 1);
 167       }
 168   do_test (0, 0, page_size - 1, 16, 0);
 169   do_test (0, 0, page_size - 1, 16, 1);
 170
 171   return ret;
 172 }
 173
 174 #include "../test-skeleton.c"