check_cache_queries.cpp
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1 
2 #define EIGEN_INTERNAL_DEBUG_CACHE_QUERY
3 #include <iostream>
4 #include "../Eigen/Core"
5 
6 using namespace Eigen;
7 using 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 
18 int main()
19 {
20  cout << "Eigen's L1 = " << internal::queryL1CacheSize() << endl;
21  cout << "Eigen's L2/L3 = " << internal::queryTopLevelCacheSize() << endl;
22  int 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 }
Eigen
Namespace containing all symbols from the Eigen library.
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l3
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l2
gtsam::Key l2
Definition: testLinearContainerFactor.cpp:24
x4
static string x4("x4")
x0
static Symbol x0('x', 0)
Eigen::internal::queryTopLevelCacheSize
int queryTopLevelCacheSize()
Definition: Memory.h:1152
DUMP_CPUID
#define DUMP_CPUID(CODE)
Definition: check_cache_queries.cpp:9
Eigen::internal::queryCacheSizes
void queryCacheSizes(int &l1, int &l2, int &l3)
Definition: Memory.h:1106
l1
gtsam::Key l1
Definition: testLinearContainerFactor.cpp:24
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Definition: BFloat16.h:88
main
int main()
Definition: check_cache_queries.cpp:18
Eigen::internal::queryL1CacheSize
int queryL1CacheSize()
Definition: Memory.h:1143
i
int i
Definition: BiCGSTAB_step_by_step.cpp:9


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autogenerated on Sun Dec 22 2024 04:11:14