change format and add getter for data_cache_size

sample/test_util.cpp

@@ -104,6 +104,9 @@ void putCPUinfo()
 		Core i7-3930K        6           2D
 	*/
 	cpu.putFamily();
+	for (unsigned int i = 0; i < cpu.getDataCacheLevels(); i++) {
+		printf("cache level=%u data cache size=%u cores sharing data cache=%u\n", i, cpu.getDataCacheSize(i), cpu.getCoresSharingDataCache(i));
+	}
 }
 
 int main()