benchtests/bench-strspn.c

   1 /* Measure strspn functions.
   2    Copyright (C) 2013-2024 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 SMALL_CHAR 127
  32 #else
  33 # define SMALL_CHAR 1273
  34 #endif /* WIDE */
  35
  36 typedef size_t (*proto_t) (const CHAR *, const CHAR *);
  37
  38 IMPL (STRSPN, 1)
  39
  40 static void
  41 do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s,
  42              const CHAR *acc, size_t exp_res)
  43 {
  44   size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS8 / CHARBYTES;
  45   timing_t start, stop, cur;
  46
  47   if (res != exp_res)
  48     {
  49       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  50              (void *) res, (void *) exp_res);
  51       ret = 1;
  52       return;
  53     }
  54
  55   TIMING_NOW (start);
  56   for (i = 0; i < iters; ++i)
  57     {
  58       CALL (impl, s, acc);
  59     }
  60   TIMING_NOW (stop);
  61
  62   TIMING_DIFF (cur, start, stop);
  63
  64   json_element_double (json_ctx, (double)cur / (double)iters);
  65 }
  66
  67 static void
  68 do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t pos,
  69          size_t len)
  70 {
  71   size_t i;
  72   CHAR *acc, *s;
  73
  74   align1 &= 7;
  75   if ((align1 + pos + 10) * sizeof (CHAR) >= page_size || len > 240 || !len)
  76     return;
  77   if ((align2 + len) * sizeof (CHAR) >= page_size)
  78     return;
  79
  80   acc = (CHAR *) (buf2) + align2;
  81   s = (CHAR *) (buf1) + align1;
  82
  83   for (i = 0; i < len; ++i)
  84     {
  85       acc[i] = random () & BIG_CHAR;
  86       if (!acc[i])
  87         acc[i] = random () & BIG_CHAR;
  88       if (!acc[i])
  89         acc[i] = 1 + (random () & SMALL_CHAR);
  90     }
  91   acc[len] = '\0';
  92
  93   for (i = 0; i < pos; ++i)
  94     s[i] = acc[random () % len];
  95   s[pos] = random () & BIG_CHAR;
  96   if (STRCHR (acc, s[pos]))
  97     s[pos] = '\0';
  98   else
  99     {
 100       for (i = pos + 1; i < pos + 10; ++i)
 101         s[i] = random () & BIG_CHAR;
 102       s[i] = '\0';
 103     }
 104
 105   json_element_object_begin (json_ctx);
 106   json_attr_uint (json_ctx, "len", len);
 107   json_attr_uint (json_ctx, "pos", pos);
 108   json_attr_uint (json_ctx, "align1", align1);
 109   json_attr_uint (json_ctx, "align2", align2);
 110   json_array_begin (json_ctx, "timings");
 111
 112   FOR_EACH_IMPL (impl, 0)
 113     do_one_test (json_ctx, impl, s, acc, pos);
 114
 115   json_array_end (json_ctx);
 116   json_element_object_end (json_ctx);
 117 }
 118
 119 int
 120 test_main (void)
 121 {
 122   json_ctx_t json_ctx;
 123   size_t i;
 124
 125   test_init ();
 126
 127   json_init (&json_ctx, 0, stdout);
 128
 129   json_document_begin (&json_ctx);
 130   json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
 131
 132   json_attr_object_begin (&json_ctx, "functions");
 133   json_attr_object_begin (&json_ctx, TEST_NAME);
 134   json_attr_string (&json_ctx, "bench-variant", "");
 135
 136   json_array_begin (&json_ctx, "ifuncs");
 137   FOR_EACH_IMPL (impl, 0)
 138     json_element_string (&json_ctx, impl->name);
 139   json_array_end (&json_ctx);
 140
 141   json_array_begin (&json_ctx, "results");
 142
 143   for (i = 0; i < 32; ++i)
 144     {
 145       do_test (&json_ctx, 0, 0, 512, i);
 146       do_test (&json_ctx, i, 0, 512, i);
 147       do_test (&json_ctx, 0, i, 512, i);
 148       do_test (&json_ctx, i, i, 512, i);
 149     }
 150
 151   for (i = 1; i < 8; ++i)
 152     {
 153       do_test (&json_ctx, 0, 0, 16 << i, 4);
 154       do_test (&json_ctx, i, 0, 16 << i, 4);
 155       do_test (&json_ctx, 0, i, 16 << i, 4);
 156       do_test (&json_ctx, i, i, 16 << i, 4);
 157     }
 158
 159   for (i = 1; i < 8; ++i)
 160     {
 161       do_test (&json_ctx, i, 0, 64, 10);
 162       do_test (&json_ctx, i, i, 64, 10);
 163     }
 164
 165   for (i = 0; i < 64; ++i)
 166     {
 167       do_test (&json_ctx, 0, 0, i, 6);
 168       do_test (&json_ctx, 0, i, i, 6);
 169     }
 170
 171   json_array_end (&json_ctx);
 172   json_attr_object_end (&json_ctx);
 173   json_attr_object_end (&json_ctx);
 174   json_document_end (&json_ctx);
 175
 176   return ret;
 177 }
 178
 179 #include <support/test-driver.c>