1  /* Check use of sysconf() for cache geometries.
       2     Copyright (C) 2017-2023 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  /* Test use of sysconf() to get cache sizes, cache set associativity
      20     and cache line sizes.  */
      21  
      22  #include <errno.h>
      23  #include <stdio.h>
      24  #include <stdlib.h>
      25  #include <unistd.h>
      26  
      27  #include <support/test-driver.h>
      28  
      29  #define call_str(f, name) f(name, #name)
      30  
      31  long
      32  do_sysconf (int name, const char * str)
      33  {
      34    int rc = 0;
      35    long val;
      36    errno = 0;
      37    val = sysconf (name);
      38    if (val == -1) {
      39      if (errno != EINVAL) {
      40        printf("error: sysconf(%s): unexpected errno(%d)\n", str, errno);
      41        exit (1);
      42      }
      43      printf ("info: sysconf(%s): unsupported\n", str);
      44      rc = 1;
      45    } else
      46      printf ("sysconf(%s) = 0x%lx (%ld)\n", str, val, val);
      47    return rc;
      48  }
      49  
      50  static int
      51  do_test (void)
      52  {
      53    int rc = 0;
      54  
      55    rc += call_str (do_sysconf, _SC_LEVEL1_ICACHE_SIZE);
      56    rc += call_str (do_sysconf, _SC_LEVEL1_ICACHE_ASSOC);
      57    rc += call_str (do_sysconf, _SC_LEVEL1_ICACHE_LINESIZE);
      58    rc += call_str (do_sysconf, _SC_LEVEL1_DCACHE_SIZE);
      59    rc += call_str (do_sysconf, _SC_LEVEL1_DCACHE_ASSOC);
      60    rc += call_str (do_sysconf, _SC_LEVEL1_DCACHE_LINESIZE);
      61    rc += call_str (do_sysconf, _SC_LEVEL2_CACHE_SIZE);
      62    rc += call_str (do_sysconf, _SC_LEVEL2_CACHE_ASSOC);
      63    rc += call_str (do_sysconf, _SC_LEVEL2_CACHE_LINESIZE);
      64    rc += call_str (do_sysconf, _SC_LEVEL3_CACHE_SIZE);
      65    rc += call_str (do_sysconf, _SC_LEVEL3_CACHE_ASSOC);
      66    rc += call_str (do_sysconf, _SC_LEVEL3_CACHE_LINESIZE);
      67  
      68    if (rc)
      69      return EXIT_UNSUPPORTED;
      70    return 0;
      71  }
      72  
      73  #include <support/test-driver.c>