Squashed 'third_party/eigen/' content from commit 61d72f6
Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/bench/check_cache_queries.cpp b/bench/check_cache_queries.cpp
new file mode 100644
index 0000000..029d44c
--- /dev/null
+++ b/bench/check_cache_queries.cpp
@@ -0,0 +1,101 @@
+
+#define EIGEN_INTERNAL_DEBUG_CACHE_QUERY
+#include <iostream>
+#include "../Eigen/Core"
+
+using namespace Eigen;
+using namespace std;
+
+#define DUMP_CPUID(CODE) {\
+ int abcd[4]; \
+ abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0;\
+ EIGEN_CPUID(abcd, CODE, 0); \
+ std::cout << "The code " << CODE << " gives " \
+ << (int*)(abcd[0]) << " " << (int*)(abcd[1]) << " " \
+ << (int*)(abcd[2]) << " " << (int*)(abcd[3]) << " " << std::endl; \
+ }
+
+int main()
+{
+ cout << "Eigen's L1 = " << internal::queryL1CacheSize() << endl;
+ cout << "Eigen's L2/L3 = " << internal::queryTopLevelCacheSize() << endl;
+ int l1, l2, l3;
+ internal::queryCacheSizes(l1, l2, l3);
+ cout << "Eigen's L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
+
+ #ifdef EIGEN_CPUID
+
+ int abcd[4];
+ int string[8];
+ char* string_char = (char*)(string);
+
+ // vendor ID
+ EIGEN_CPUID(abcd,0x0,0);
+ string[0] = abcd[1];
+ string[1] = abcd[3];
+ string[2] = abcd[2];
+ string[3] = 0;
+ cout << endl;
+ cout << "vendor id = " << string_char << endl;
+ cout << endl;
+ int max_funcs = abcd[0];
+
+ internal::queryCacheSizes_intel_codes(l1, l2, l3);
+ cout << "Eigen's intel codes L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
+ if(max_funcs>=4)
+ {
+ internal::queryCacheSizes_intel_direct(l1, l2, l3);
+ cout << "Eigen's intel direct L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
+ }
+ internal::queryCacheSizes_amd(l1, l2, l3);
+ cout << "Eigen's amd L1, L2, L3 = " << l1 << " " << l2 << " " << l3 << endl;
+ cout << endl;
+
+ // dump Intel direct method
+ if(max_funcs>=4)
+ {
+ l1 = l2 = l3 = 0;
+ int cache_id = 0;
+ int cache_type = 0;
+ do {
+ abcd[0] = abcd[1] = abcd[2] = abcd[3] = 0;
+ EIGEN_CPUID(abcd,0x4,cache_id);
+ cache_type = (abcd[0] & 0x0F) >> 0;
+ int cache_level = (abcd[0] & 0xE0) >> 5; // A[7:5]
+ int ways = (abcd[1] & 0xFFC00000) >> 22; // B[31:22]
+ int partitions = (abcd[1] & 0x003FF000) >> 12; // B[21:12]
+ int line_size = (abcd[1] & 0x00000FFF) >> 0; // B[11:0]
+ int sets = (abcd[2]); // C[31:0]
+ int cache_size = (ways+1) * (partitions+1) * (line_size+1) * (sets+1);
+
+ cout << "cache[" << cache_id << "].type = " << cache_type << "\n";
+ cout << "cache[" << cache_id << "].level = " << cache_level << "\n";
+ cout << "cache[" << cache_id << "].ways = " << ways << "\n";
+ cout << "cache[" << cache_id << "].partitions = " << partitions << "\n";
+ cout << "cache[" << cache_id << "].line_size = " << line_size << "\n";
+ cout << "cache[" << cache_id << "].sets = " << sets << "\n";
+ cout << "cache[" << cache_id << "].size = " << cache_size << "\n";
+
+ cache_id++;
+ } while(cache_type>0 && cache_id<16);
+ }
+
+ // dump everything
+ std::cout << endl <<"Raw dump:" << endl;
+ for(int i=0; i<max_funcs; ++i)
+ DUMP_CPUID(i);
+
+ DUMP_CPUID(0x80000000);
+ DUMP_CPUID(0x80000001);
+ DUMP_CPUID(0x80000002);
+ DUMP_CPUID(0x80000003);
+ DUMP_CPUID(0x80000004);
+ DUMP_CPUID(0x80000005);
+ DUMP_CPUID(0x80000006);
+ DUMP_CPUID(0x80000007);
+ DUMP_CPUID(0x80000008);
+ #else
+ cout << "EIGEN_CPUID is not defined" << endl;
+ #endif
+ return 0;
+}