check_cache_queries.cpp
Go to the documentation of this file.
00001 
00002 #define EIGEN_INTERNAL_DEBUG_CACHE_QUERY
00003 #include <iostream>
00004 #include "../Eigen/Core"
00005 
00006 using namespace Eigen;
00007 using namespace std;
00008 
00009 #define DUMP_CPUID(CODE) {\
00010   int abcd[4]; \
00011   abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0;\
00012   EIGEN_CPUID(abcd, CODE, 0); \
00013   std::cout << "The code " << CODE << " gives " \
00014               << (int*)(abcd[0]) << " " << (int*)(abcd[1]) << " " \
00015               << (int*)(abcd[2]) << " " << (int*)(abcd[3]) << " " << std::endl; \
00016   }
00017   
00018 int main()
00019 {
00020   cout << "Eigen's L1    = " << internal::queryL1CacheSize() << endl;
00021   cout << "Eigen's L2/L3 = " << internal::queryTopLevelCacheSize() << endl;
00022   int l1, l2, l3;
00023   internal::queryCacheSizes(l1, l2, l3);
00024   cout << "Eigen's L1, L2, L3       = " << l1 << " " << l2 << " " << l3 << endl;
00025   
00026   #ifdef EIGEN_CPUID
00027 
00028   int abcd[4];
00029   int string[8];
00030   char* string_char = (char*)(string);
00031 
00032   // vendor ID
00033   EIGEN_CPUID(abcd,0x0,0);
00034   string[0] = abcd[1];
00035   string[1] = abcd[3];
00036   string[2] = abcd[2];
00037   string[3] = 0;
00038   cout << endl;
00039   cout << "vendor id = " << string_char << endl;
00040   cout << endl;
00041   int max_funcs = abcd[0];
00042 
00043   internal::queryCacheSizes_intel_codes(l1, l2, l3);
00044   cout << "Eigen's intel codes L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
00045   if(max_funcs>=4)
00046   {
00047     internal::queryCacheSizes_intel_direct(l1, l2, l3);
00048     cout << "Eigen's intel direct L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
00049   }
00050   internal::queryCacheSizes_amd(l1, l2, l3);
00051   cout << "Eigen's amd L1, L2, L3         = " << l1 << " " << l2 << " " << l3 << endl;
00052   cout << endl;
00053   
00054   // dump Intel direct method
00055   if(max_funcs>=4)
00056   {
00057     l1 = l2 = l3 = 0;
00058     int cache_id = 0;
00059     int cache_type = 0;
00060     do {
00061       abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0;
00062       EIGEN_CPUID(abcd,0x4,cache_id);
00063       cache_type  = (abcd[0] & 0x0F) >> 0;
00064       int cache_level = (abcd[0] & 0xE0) >> 5;  // A[7:5]
00065       int ways        = (abcd[1] & 0xFFC00000) >> 22; // B[31:22]
00066       int partitions  = (abcd[1] & 0x003FF000) >> 12; // B[21:12]
00067       int line_size   = (abcd[1] & 0x00000FFF) >>  0; // B[11:0]
00068       int sets        = (abcd[2]);                    // C[31:0]
00069       int cache_size = (ways+1) * (partitions+1) * (line_size+1) * (sets+1);
00070       
00071       cout << "cache[" << cache_id << "].type       = " << cache_type << "\n";
00072       cout << "cache[" << cache_id << "].level      = " << cache_level << "\n";
00073       cout << "cache[" << cache_id << "].ways       = " << ways << "\n";
00074       cout << "cache[" << cache_id << "].partitions = " << partitions << "\n";
00075       cout << "cache[" << cache_id << "].line_size  = " << line_size << "\n";
00076       cout << "cache[" << cache_id << "].sets       = " << sets << "\n";
00077       cout << "cache[" << cache_id << "].size       = " << cache_size << "\n";
00078       
00079       cache_id++;
00080     } while(cache_type>0 && cache_id<16);
00081   }
00082   
00083   // dump everything
00084   std::cout << endl <<"Raw dump:" << endl;
00085   for(int i=0; i<max_funcs; ++i)
00086     DUMP_CPUID(i);
00087 
00088   DUMP_CPUID(0x80000000);
00089   DUMP_CPUID(0x80000001);
00090   DUMP_CPUID(0x80000002);
00091   DUMP_CPUID(0x80000003);
00092   DUMP_CPUID(0x80000004);
00093   DUMP_CPUID(0x80000005);
00094   DUMP_CPUID(0x80000006);
00095   DUMP_CPUID(0x80000007);
00096   DUMP_CPUID(0x80000008);
00097   #else
00098   cout << "EIGEN_CPUID is not defined" << endl;
00099   #endif
00100   return 0;
00101 }


libicr
Author(s): Robert Krug
autogenerated on Mon Jan 6 2014 11:32:31