benchtests/bench-strspn.c

   1 /* Measure strspn functions.
   2    Copyright (C) 2013-2022 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 #ifndef WIDE
  21 # define TEST_NAME "strspn"
  22 #else
  23 # define TEST_NAME "wcsspn"
  24 #endif /* WIDE */
  25 #include "bench-string.h"
  26 #include "json-lib.h"
  27
  28 #define BIG_CHAR MAX_CHAR
  29
  30 #ifndef WIDE
  31 # define SIMPLE_STRSPN simple_strspn
  32 # define SMALL_CHAR 127
  33 #else
  34 # define SIMPLE_STRSPN simple_wcsspn
  35 # define SMALL_CHAR 1273
  36 #endif /* WIDE */
  37
  38 typedef size_t (*proto_t) (const CHAR *, const CHAR *);
  39 size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);
  40
  41 IMPL (SIMPLE_STRSPN, 0)
  42 IMPL (STRSPN, 1)
  43
  44 size_t
  45 SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)
  46 {
  47   const CHAR *r, *str = s;
  48   CHAR c;
  49
  50   while ((c = *s++) != '\0')
  51     {
  52       for (r = acc; *r != '\0'; ++r)
  53         if (*r == c)
  54           break;
  55       if (*r == '\0')
  56         return s - str - 1;
  57     }
  58   return s - str - 1;
  59 }
  60
  61 static void
  62 do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s,
  63              const CHAR *acc, size_t exp_res)
  64 {
  65   size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS;
  66   timing_t start, stop, cur;
  67
  68   if (res != exp_res)
  69     {
  70       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  71              (void *) res, (void *) exp_res);
  72       ret = 1;
  73       return;
  74     }
  75
  76   TIMING_NOW (start);
  77   for (i = 0; i < iters; ++i)
  78     {
  79       CALL (impl, s, acc);
  80     }
  81   TIMING_NOW (stop);
  82
  83   TIMING_DIFF (cur, start, stop);
  84
  85   json_element_double (json_ctx, (double)cur / (double)iters);
  86 }
  87
  88 static void
  89 do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t pos,
  90          size_t len)
  91 {
  92   size_t i;
  93   CHAR *acc, *s;
  94
  95   align1 &= 7;
  96   if ((align1 + pos + 10) * sizeof (CHAR) >= page_size || len > 240 || !len)
  97     return;
  98   if ((align2 + len) * sizeof (CHAR) >= page_size)
  99     return;
 100
 101   acc = (CHAR *) (buf2) + align2;
 102   s = (CHAR *) (buf1) + align1;
 103
 104   for (i = 0; i < len; ++i)
 105     {
 106       acc[i] = random () & BIG_CHAR;
 107       if (!acc[i])
 108         acc[i] = random () & BIG_CHAR;
 109       if (!acc[i])
 110         acc[i] = 1 + (random () & SMALL_CHAR);
 111     }
 112   acc[len] = '\0';
 113
 114   for (i = 0; i < pos; ++i)
 115     s[i] = acc[random () % len];
 116   s[pos] = random () & BIG_CHAR;
 117   if (STRCHR (acc, s[pos]))
 118     s[pos] = '\0';
 119   else
 120     {
 121       for (i = pos + 1; i < pos + 10; ++i)
 122         s[i] = random () & BIG_CHAR;
 123       s[i] = '\0';
 124     }
 125
 126   json_element_object_begin (json_ctx);
 127   json_attr_uint (json_ctx, "len", len);
 128   json_attr_uint (json_ctx, "pos", pos);
 129   json_attr_uint (json_ctx, "align1", align1);
 130   json_attr_uint (json_ctx, "align2", align2);
 131   json_array_begin (json_ctx, "timings");
 132
 133   FOR_EACH_IMPL (impl, 0)
 134     do_one_test (json_ctx, impl, s, acc, pos);
 135
 136   json_array_end (json_ctx);
 137   json_element_object_end (json_ctx);
 138 }
 139
 140 int
 141 test_main (void)
 142 {
 143   json_ctx_t json_ctx;
 144   size_t i;
 145
 146   test_init ();
 147
 148   json_init (&json_ctx, 0, stdout);
 149
 150   json_document_begin (&json_ctx);
 151   json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
 152
 153   json_attr_object_begin (&json_ctx, "functions");
 154   json_attr_object_begin (&json_ctx, TEST_NAME);
 155   json_attr_string (&json_ctx, "bench-variant", "");
 156
 157   json_array_begin (&json_ctx, "ifuncs");
 158   FOR_EACH_IMPL (impl, 0)
 159     json_element_string (&json_ctx, impl->name);
 160   json_array_end (&json_ctx);
 161
 162   json_array_begin (&json_ctx, "results");
 163
 164   for (i = 0; i < 32; ++i)
 165     {
 166       do_test (&json_ctx, 0, 0, 512, i);
 167       do_test (&json_ctx, i, 0, 512, i);
 168       do_test (&json_ctx, 0, i, 512, i);
 169       do_test (&json_ctx, i, i, 512, i);
 170     }
 171
 172   for (i = 1; i < 8; ++i)
 173     {
 174       do_test (&json_ctx, 0, 0, 16 << i, 4);
 175       do_test (&json_ctx, i, 0, 16 << i, 4);
 176       do_test (&json_ctx, 0, i, 16 << i, 4);
 177       do_test (&json_ctx, i, i, 16 << i, 4);
 178     }
 179
 180   for (i = 1; i < 8; ++i)
 181     {
 182       do_test (&json_ctx, i, 0, 64, 10);
 183       do_test (&json_ctx, i, i, 64, 10);
 184     }
 185
 186   for (i = 0; i < 64; ++i)
 187     {
 188       do_test (&json_ctx, 0, 0, i, 6);
 189       do_test (&json_ctx, 0, i, i, 6);
 190     }
 191
 192   json_array_end (&json_ctx);
 193   json_attr_object_end (&json_ctx);
 194   json_attr_object_end (&json_ctx);
 195   json_document_end (&json_ctx);
 196
 197   return ret;
 198 }
 199
 200 #include <support/test-driver.c>