1
2#define EIGEN_INTERNAL_DEBUG_CACHE_QUERY
3#include <iostream>
4#include "../Eigen/Core"
5
6using namespace Eigen;
7using namespace std;
8
9#define DUMP_CPUID(CODE) {\
10  int abcd[4]; \
11  abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0;\
12  EIGEN_CPUID(abcd, CODE, 0); \
13  std::cout << "The code " << CODE << " gives " \
14              << (int*)(abcd[0]) << " " << (int*)(abcd[1]) << " " \
15              << (int*)(abcd[2]) << " " << (int*)(abcd[3]) << " " << std::endl; \
16  }
17
18int main()
19{
20  cout << "Eigen's L1    = " << internal::queryL1CacheSize() << endl;
21  cout << "Eigen's L2/L3 = " << internal::queryTopLevelCacheSize() << endl;
22  int l1, l2, l3;
23  internal::queryCacheSizes(l1, l2, l3);
24  cout << "Eigen's L1, L2, L3       = " << l1 << " " << l2 << " " << l3 << endl;
25
26  #ifdef EIGEN_CPUID
27
28  int abcd[4];
29  int string[8];
30  char* string_char = (char*)(string);
31
32  // vendor ID
33  EIGEN_CPUID(abcd,0x0,0);
34  string[0] = abcd[1];
35  string[1] = abcd[3];
36  string[2] = abcd[2];
37  string[3] = 0;
38  cout << endl;
39  cout << "vendor id = " << string_char << endl;
40  cout << endl;
41  int max_funcs = abcd[0];
42
43  internal::queryCacheSizes_intel_codes(l1, l2, l3);
44  cout << "Eigen's intel codes L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
45  if(max_funcs>=4)
46  {
47    internal::queryCacheSizes_intel_direct(l1, l2, l3);
48    cout << "Eigen's intel direct L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
49  }
50  internal::queryCacheSizes_amd(l1, l2, l3);
51  cout << "Eigen's amd L1, L2, L3         = " << l1 << " " << l2 << " " << l3 << endl;
52  cout << endl;
53
54  // dump Intel direct method
55  if(max_funcs>=4)
56  {
57    l1 = l2 = l3 = 0;
58    int cache_id = 0;
59    int cache_type = 0;
60    do {
61      abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0;
62      EIGEN_CPUID(abcd,0x4,cache_id);
63      cache_type  = (abcd[0] & 0x0F) >> 0;
64      int cache_level = (abcd[0] & 0xE0) >> 5;  // A[7:5]
65      int ways        = (abcd[1] & 0xFFC00000) >> 22; // B[31:22]
66      int partitions  = (abcd[1] & 0x003FF000) >> 12; // B[21:12]
67      int line_size   = (abcd[1] & 0x00000FFF) >>  0; // B[11:0]
68      int sets        = (abcd[2]);                    // C[31:0]
69      int cache_size = (ways+1) * (partitions+1) * (line_size+1) * (sets+1);
70
71      cout << "cache[" << cache_id << "].type       = " << cache_type << "\n";
72      cout << "cache[" << cache_id << "].level      = " << cache_level << "\n";
73      cout << "cache[" << cache_id << "].ways       = " << ways << "\n";
74      cout << "cache[" << cache_id << "].partitions = " << partitions << "\n";
75      cout << "cache[" << cache_id << "].line_size  = " << line_size << "\n";
76      cout << "cache[" << cache_id << "].sets       = " << sets << "\n";
77      cout << "cache[" << cache_id << "].size       = " << cache_size << "\n";
78
79      cache_id++;
80    } while(cache_type>0 && cache_id<16);
81  }
82
83  // dump everything
84  std::cout << endl <<"Raw dump:" << endl;
85  for(int i=0; i<max_funcs; ++i)
86    DUMP_CPUID(i);
87
88  DUMP_CPUID(0x80000000);
89  DUMP_CPUID(0x80000001);
90  DUMP_CPUID(0x80000002);
91  DUMP_CPUID(0x80000003);
92  DUMP_CPUID(0x80000004);
93  DUMP_CPUID(0x80000005);
94  DUMP_CPUID(0x80000006);
95  DUMP_CPUID(0x80000007);
96  DUMP_CPUID(0x80000008);
97  #else
98  cout << "EIGEN_CPUID is not defined" << endl;
99  #endif
100  return 0;
101}
102