benchtests/bench-strtok.c

   1 /* Measure strtok 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 "strtok"
  21 #include "bench-string.h"
  22
  23 #define STRTOK strtok_string
  24 #include <string/strtok.c>
  25
  26
  27 typedef char *(*proto_t) (const char *, const char *);
  28
  29 IMPL (strtok_string, 0)
  30 IMPL (strtok, 1)
  31
  32 static void
  33 do_one_test (impl_t * impl, const char *s1, const char *s2)
  34 {
  35   size_t i, iters = INNER_LOOP_ITERS;
  36   timing_t start, stop, cur;
  37   TIMING_NOW (start);
  38   for (i = 0; i < iters; ++i)
  39     {
  40       CALL (impl, s1, s2);
  41       CALL (impl, NULL, s2);
  42       CALL (impl, NULL, s2);
  43     }
  44   TIMING_NOW (stop);
  45
  46   TIMING_DIFF (cur, start, stop);
  47
  48   TIMING_PRINT_MEAN ((double) cur, (double) iters);
  49
  50 }
  51
  52
  53 static void
  54 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int fail)
  55 {
  56   char *s2 = (char *) (buf2 + align2);
  57   static const char d[] = "1234567890abcdef";
  58 #define dl (sizeof (d) - 1)
  59   char *ss2 = s2;
  60   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
  61     {
  62       size_t t = l > dl ? dl : l;
  63       ss2 = mempcpy (ss2, d, t);
  64     }
  65   s2[len2] = '\0';
  66
  67   printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
  68           len1, len2, align1, align2, fail ? "fail" : "found");
  69
  70   FOR_EACH_IMPL (impl, 0)
  71   {
  72     char *s1 = (char *) (buf1 + align1);
  73     if (fail)
  74       {
  75         char *ss1 = s1;
  76         for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
  77           {
  78             size_t t = l > dl ? dl : l;
  79             memcpy (ss1, d, t);
  80             ++ss1[len2 > 7 ? 7 : len2 - 1];
  81             ss1 += t;
  82           }
  83       }
  84     else
  85       {
  86         memset (s1, '0', len1);
  87         memcpy (s1 + (len1 - len2) - 2, s2, len2);
  88         if ((len1 / len2) > 4)
  89           memcpy (s1 + (len1 - len2) - (3 * len2), s2, len2);
  90       }
  91     s1[len1] = '\0';
  92     do_one_test (impl, s1, s2);
  93   }
  94   putchar ('\n');
  95 }
  96
  97 static int
  98 test_main (void)
  99 {
 100   test_init ();
 101
 102   printf ("%23s", "");
 103   FOR_EACH_IMPL (impl, 0)
 104     printf ("\t%s", impl->name);
 105   putchar ('\n');
 106
 107   for (size_t klen = 2; klen < 32; ++klen)
 108     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 109       {
 110         do_test (0, 0, hlen, klen, 0);
 111         do_test (0, 0, hlen, klen, 1);
 112         do_test (0, 3, hlen, klen, 0);
 113         do_test (0, 3, hlen, klen, 1);
 114         do_test (0, 9, hlen, klen, 0);
 115         do_test (0, 9, hlen, klen, 1);
 116         do_test (0, 15, hlen, klen, 0);
 117         do_test (0, 15, hlen, klen, 1);
 118
 119         do_test (3, 0, hlen, klen, 0);
 120         do_test (3, 0, hlen, klen, 1);
 121         do_test (3, 3, hlen, klen, 0);
 122         do_test (3, 3, hlen, klen, 1);
 123         do_test (3, 9, hlen, klen, 0);
 124         do_test (3, 9, hlen, klen, 1);
 125         do_test (3, 15, hlen, klen, 0);
 126         do_test (3, 15, hlen, klen, 1);
 127
 128         do_test (9, 0, hlen, klen, 0);
 129         do_test (9, 0, hlen, klen, 1);
 130         do_test (9, 3, hlen, klen, 0);
 131         do_test (9, 3, hlen, klen, 1);
 132         do_test (9, 9, hlen, klen, 0);
 133         do_test (9, 9, hlen, klen, 1);
 134         do_test (9, 15, hlen, klen, 0);
 135         do_test (9, 15, hlen, klen, 1);
 136
 137         do_test (15, 0, hlen, klen, 0);
 138         do_test (15, 0, hlen, klen, 1);
 139         do_test (15, 3, hlen, klen, 0);
 140         do_test (15, 3, hlen, klen, 1);
 141         do_test (15, 9, hlen, klen, 0);
 142         do_test (15, 9, hlen, klen, 1);
 143         do_test (15, 15, hlen, klen, 0);
 144         do_test (15, 15, hlen, klen, 1);
 145       }
 146   do_test (0, 0, page_size - 1, 16, 0);
 147   do_test (0, 0, page_size - 1, 16, 1);
 148
 149   return ret;
 150 }
 151
 152 #include "../test-skeleton.c"