sysdeps/x86/tst-sysconf-cache-linesize.c

   1 /* Test system cache line sizes.
   2    Copyright (C) 2021-2023 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 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <array_length.h>
  23
  24 static struct
  25 {
  26   const char *name;
  27   int _SC_val;
  28 } sc_options[] =
  29   {
  30 #define N(name) { "_SC_"#name, _SC_##name }
  31     N (LEVEL1_ICACHE_LINESIZE),
  32     N (LEVEL1_DCACHE_LINESIZE),
  33     N (LEVEL2_CACHE_LINESIZE)
  34   };
  35
  36 static int
  37 do_test (void)
  38 {
  39   int result = EXIT_SUCCESS;
  40
  41   for (int i = 0; i < array_length (sc_options); ++i)
  42     {
  43       long int scret = sysconf (sc_options[i]._SC_val);
  44       if (scret < 0)
  45         {
  46           printf ("sysconf (%s) returned < 0 (%ld)\n",
  47                   sc_options[i].name, scret);
  48           result = EXIT_FAILURE;
  49         }
  50       else
  51         printf ("sysconf (%s): %ld\n", sc_options[i].name, scret);
  52     }
  53
  54   return result;
  55 }
  56
  57 #include <support/test-driver.c>