tests/test-x86-cpuid.c

   1 /*
   2  *  Test code for x86 CPUID and Topology functions
   3  *
   4  *  Copyright (c) 2012 Red Hat Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include <glib.h>
  26
  27 #include "topology.h"
  28
  29 static void test_topo_bits(void)
  30 {
  31     /* simple tests for 1 thread per core, 1 core per socket */
  32     g_assert_cmpuint(apicid_smt_width(1, 1), ==, 0);
  33     g_assert_cmpuint(apicid_core_width(1, 1), ==, 0);
  34
  35     g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 0), ==, 0);
  36     g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 1), ==, 1);
  37     g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 2), ==, 2);
  38     g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 3), ==, 3);
  39
  40
  41     /* Test field width calculation for multiple values
  42      */
  43     g_assert_cmpuint(apicid_smt_width(1, 2), ==, 1);
  44     g_assert_cmpuint(apicid_smt_width(1, 3), ==, 2);
  45     g_assert_cmpuint(apicid_smt_width(1, 4), ==, 2);
  46
  47     g_assert_cmpuint(apicid_smt_width(1, 14), ==, 4);
  48     g_assert_cmpuint(apicid_smt_width(1, 15), ==, 4);
  49     g_assert_cmpuint(apicid_smt_width(1, 16), ==, 4);
  50     g_assert_cmpuint(apicid_smt_width(1, 17), ==, 5);
  51
  52
  53     g_assert_cmpuint(apicid_core_width(30, 2), ==, 5);
  54     g_assert_cmpuint(apicid_core_width(31, 2), ==, 5);
  55     g_assert_cmpuint(apicid_core_width(32, 2), ==, 5);
  56     g_assert_cmpuint(apicid_core_width(33, 2), ==, 6);
  57
  58
  59     /* build a weird topology and see if IDs are calculated correctly
  60      */
  61
  62     /* This will use 2 bits for thread ID and 3 bits for core ID
  63      */
  64     g_assert_cmpuint(apicid_smt_width(6, 3), ==, 2);
  65     g_assert_cmpuint(apicid_core_width(6, 3), ==, 3);
  66     g_assert_cmpuint(apicid_pkg_offset(6, 3), ==, 5);
  67
  68     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 0), ==, 0);
  69     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1), ==, 1);
  70     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2), ==, 2);
  71
  72     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 3 + 0), ==,
  73                      (1 << 2) | 0);
  74     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 3 + 1), ==,
  75                      (1 << 2) | 1);
  76     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 3 + 2), ==,
  77                      (1 << 2) | 2);
  78
  79     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2 * 3 + 0), ==,
  80                      (2 << 2) | 0);
  81     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2 * 3 + 1), ==,
  82                      (2 << 2) | 1);
  83     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2 * 3 + 2), ==,
  84                      (2 << 2) | 2);
  85
  86     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 5 * 3 + 0), ==,
  87                      (5 << 2) | 0);
  88     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 5 * 3 + 1), ==,
  89                      (5 << 2) | 1);
  90     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 5 * 3 + 2), ==,
  91                      (5 << 2) | 2);
  92
  93     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 6 * 3 + 0 * 3 + 0), ==,
  94                      (1 << 5));
  95     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 6 * 3 + 1 * 3 + 1), ==,
  96                      (1 << 5) | (1 << 2) | 1);
  97     g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 3 * 6 * 3 + 5 * 3 + 2), ==,
  98                      (3 << 5) | (5 << 2) | 2);
  99 }
 100
 101 int main(int argc, char **argv)
 102 {
 103     g_test_init(&argc, &argv, NULL);
 104
 105     g_test_add_func("/cpuid/topology/basic", test_topo_bits);
 106
 107     g_test_run();
 108
 109     return 0;
 110 }