benchtests/bench-strtok.c

   1 /* Measure strtok functions.
   2    Copyright (C) 2013-2023 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #define TEST_MAIN
  20 #define TEST_NAME "strtok"
  21 #include "bench-string.h"
  22
  23 typedef char *(*proto_t) (const char *, const char *);
  24
  25 IMPL (strtok, 1)
  26
  27 static void
  28 do_one_test (impl_t * impl, const char *s1, const char *s2)
  29 {
  30   size_t i, iters = INNER_LOOP_ITERS_MEDIUM;
  31   timing_t start, stop, cur;
  32   TIMING_NOW (start);
  33   for (i = 0; i < iters; ++i)
  34     {
  35       CALL (impl, s1, s2);
  36       CALL (impl, NULL, s2);
  37       CALL (impl, NULL, s2);
  38     }
  39   TIMING_NOW (stop);
  40
  41   TIMING_DIFF (cur, start, stop);
  42
  43   TIMING_PRINT_MEAN ((double) cur, (double) iters);
  44 }
  45
  46
  47 static void
  48 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int fail)
  49 {
  50   char *s2 = (char *) (buf2 + align2);
  51   static const char d[] = "1234567890abcdef";
  52 #define dl (sizeof (d) - 1)
  53   char *ss2 = s2;
  54   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
  55     {
  56       size_t t = l > dl ? dl : l;
  57       ss2 = mempcpy (ss2, d, t);
  58     }
  59   s2[len2] = '\0';
  60
  61   printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
  62           len1, len2, align1, align2, fail ? "fail" : "found");
  63
  64   FOR_EACH_IMPL (impl, 0)
  65   {
  66     char *s1 = (char *) (buf1 + align1);
  67     if (fail)
  68       {
  69         char *ss1 = s1;
  70         for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
  71           {
  72             size_t t = l > dl ? dl : l;
  73             memcpy (ss1, d, t);
  74             ++ss1[len2 > 7 ? 7 : len2 - 1];
  75             ss1 += t;
  76           }
  77       }
  78     else
  79       {
  80         memset (s1, '0', len1);
  81         memcpy (s1 + (len1 - len2) - 2, s2, len2);
  82         if ((len1 / len2) > 4)
  83           memcpy (s1 + (len1 - len2) - (3 * len2), s2, len2);
  84       }
  85     s1[len1] = '\0';
  86     do_one_test (impl, s1, s2);
  87   }
  88   putchar ('\n');
  89 }
  90
  91 static int
  92 test_main (void)
  93 {
  94   test_init ();
  95
  96   printf ("%23s", "");
  97   FOR_EACH_IMPL (impl, 0)
  98     printf ("\t%s", impl->name);
  99   putchar ('\n');
 100
 101   for (size_t klen = 2; klen < 32; ++klen)
 102     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 103       {
 104         do_test (0, 0, hlen, klen, 0);
 105         do_test (0, 0, hlen, klen, 1);
 106         do_test (0, 3, hlen, klen, 0);
 107         do_test (0, 3, hlen, klen, 1);
 108         do_test (0, 9, hlen, klen, 0);
 109         do_test (0, 9, hlen, klen, 1);
 110         do_test (0, 15, hlen, klen, 0);
 111         do_test (0, 15, hlen, klen, 1);
 112
 113         do_test (3, 0, hlen, klen, 0);
 114         do_test (3, 0, hlen, klen, 1);
 115         do_test (3, 3, hlen, klen, 0);
 116         do_test (3, 3, hlen, klen, 1);
 117         do_test (3, 9, hlen, klen, 0);
 118         do_test (3, 9, hlen, klen, 1);
 119         do_test (3, 15, hlen, klen, 0);
 120         do_test (3, 15, hlen, klen, 1);
 121
 122         do_test (9, 0, hlen, klen, 0);
 123         do_test (9, 0, hlen, klen, 1);
 124         do_test (9, 3, hlen, klen, 0);
 125         do_test (9, 3, hlen, klen, 1);
 126         do_test (9, 9, hlen, klen, 0);
 127         do_test (9, 9, hlen, klen, 1);
 128         do_test (9, 15, hlen, klen, 0);
 129         do_test (9, 15, hlen, klen, 1);
 130
 131         do_test (15, 0, hlen, klen, 0);
 132         do_test (15, 0, hlen, klen, 1);
 133         do_test (15, 3, hlen, klen, 0);
 134         do_test (15, 3, hlen, klen, 1);
 135         do_test (15, 9, hlen, klen, 0);
 136         do_test (15, 9, hlen, klen, 1);
 137         do_test (15, 15, hlen, klen, 0);
 138         do_test (15, 15, hlen, klen, 1);
 139       }
 140   do_test (0, 0, page_size - 1, 16, 0);
 141   do_test (0, 0, page_size - 1, 16, 1);
 142
 143   return ret;
 144 }
 145
 146 #include <support/test-driver.c>