ground/gcs/src/libs/eigen/bench/check_cache_queries.cpp

   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;
  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 }