98 lines
3.6 KiB
C++
98 lines
3.6 KiB
C++
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#define EIGEN_INTERNAL_DEBUG_CACHE_QUERY
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#include <iostream>
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#include "../Eigen/Core"
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using namespace Eigen;
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using namespace std;
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#define DUMP_CPUID(CODE) \
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{ \
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int abcd[4]; \
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abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0; \
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EIGEN_CPUID(abcd, CODE, 0); \
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std::cout << "The code " << CODE << " gives " << (int*)(abcd[0]) << " " << (int*)(abcd[1]) << " " \
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<< (int*)(abcd[2]) << " " << (int*)(abcd[3]) << " " << std::endl; \
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}
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int main() {
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cout << "Eigen's L1 = " << internal::queryL1CacheSize() << endl;
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cout << "Eigen's L2/L3 = " << internal::queryTopLevelCacheSize() << endl;
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int l1, l2, l3;
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internal::queryCacheSizes(l1, l2, l3);
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cout << "Eigen's L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
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#ifdef EIGEN_CPUID
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int abcd[4];
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int string[8];
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char* string_char = (char*)(string);
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// vendor ID
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EIGEN_CPUID(abcd, 0x0, 0);
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string[0] = abcd[1];
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string[1] = abcd[3];
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string[2] = abcd[2];
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string[3] = 0;
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cout << endl;
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cout << "vendor id = " << string_char << endl;
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cout << endl;
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int max_funcs = abcd[0];
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internal::queryCacheSizes_intel_codes(l1, l2, l3);
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cout << "Eigen's intel codes L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
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if (max_funcs >= 4) {
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internal::queryCacheSizes_intel_direct(l1, l2, l3);
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cout << "Eigen's intel direct L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
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}
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internal::queryCacheSizes_amd(l1, l2, l3);
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cout << "Eigen's amd L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
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cout << endl;
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// dump Intel direct method
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if (max_funcs >= 4) {
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l1 = l2 = l3 = 0;
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int cache_id = 0;
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int cache_type = 0;
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do {
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abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0;
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EIGEN_CPUID(abcd, 0x4, cache_id);
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cache_type = (abcd[0] & 0x0F) >> 0;
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int cache_level = (abcd[0] & 0xE0) >> 5; // A[7:5]
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int ways = (abcd[1] & 0xFFC00000) >> 22; // B[31:22]
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int partitions = (abcd[1] & 0x003FF000) >> 12; // B[21:12]
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int line_size = (abcd[1] & 0x00000FFF) >> 0; // B[11:0]
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int sets = (abcd[2]); // C[31:0]
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int cache_size = (ways + 1) * (partitions + 1) * (line_size + 1) * (sets + 1);
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cout << "cache[" << cache_id << "].type = " << cache_type << "\n";
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cout << "cache[" << cache_id << "].level = " << cache_level << "\n";
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cout << "cache[" << cache_id << "].ways = " << ways << "\n";
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cout << "cache[" << cache_id << "].partitions = " << partitions << "\n";
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cout << "cache[" << cache_id << "].line_size = " << line_size << "\n";
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cout << "cache[" << cache_id << "].sets = " << sets << "\n";
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cout << "cache[" << cache_id << "].size = " << cache_size << "\n";
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cache_id++;
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} while (cache_type > 0 && cache_id < 16);
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}
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// dump everything
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std::cout << endl << "Raw dump:" << endl;
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for (int i = 0; i < max_funcs; ++i) DUMP_CPUID(i);
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DUMP_CPUID(0x80000000);
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DUMP_CPUID(0x80000001);
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DUMP_CPUID(0x80000002);
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DUMP_CPUID(0x80000003);
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DUMP_CPUID(0x80000004);
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DUMP_CPUID(0x80000005);
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DUMP_CPUID(0x80000006);
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DUMP_CPUID(0x80000007);
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DUMP_CPUID(0x80000008);
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#else
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cout << "EIGEN_CPUID is not defined" << endl;
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#endif
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return 0;
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}
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