diff --git a/CMakeLists.txt b/CMakeLists.txt
index c2710f7..d768890 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -73,6 +73,7 @@ message(STATUS "Collected libs: ${B14LIBS}")
 enable_testing()
 add_subdirectory(tests)
 message(STATUS "Collected tests: ${B14TESTS}")
+
 foreach(TARGET_NAME ${B14TESTS})
   target_link_libraries(${TARGET_NAME} ${B14LIBS})
 endforeach()
diff --git a/include/test.hpp b/include/test.hpp
new file mode 100644
index 0000000..7667032
--- /dev/null
+++ b/include/test.hpp
@@ -0,0 +1,15 @@
+#ifndef _TEST_KERNELS_H_
+#define _TEST_KERNELS_H_
+
+#include <stdint.h>
+
+namespace base16384 {
+class test {
+ public:
+  // base16384_test_kernels_basic is a demo calculation that implements
+  // mod, bit, plus and mul calculations.
+  SYCL_EXTERNAL static uint8_t kernels_basic(uint8_t in);
+};
+}  // namespace base16384
+
+#endif
\ No newline at end of file
diff --git a/include/xeinfo.hpp b/include/xeinfo.hpp
index 11e8968..9beb080 100644
--- a/include/xeinfo.hpp
+++ b/include/xeinfo.hpp
@@ -1,6 +1,9 @@
 #ifndef _XEINFO_HPP_
 #define _XEINFO_HPP_
 
+#include <stdint.h>
+
+#include <iomanip>
 #include <iostream>
 #include <sstream>
 #include <string>
@@ -59,7 +62,7 @@ class xeinfo {
   const int num_subslices_per_slice;
   const int num_eus_per_subslice;
   const int num_threads_per_eu;
-  const int global_mem_size;
+  const uint64_t global_mem_size;
   const int local_mem_size;
   const int max_work_group_size;
   const std::vector<unsigned long long> sub_group_sizes;
@@ -84,8 +87,9 @@ class xeinfo {
     builder << "  每个 XeCore 的硬件线程数: " << num_thread_per_xecore << "\n";
     builder << "  每个向量引擎的硬件线程数: " << num_threads_per_eu << "\n";
     builder << "  硬件线程总数: " << total_hardware_threads << "\n";
-    builder << "  GPU 内存大小: " << global_mem_size << " 字节\n";
-    builder << "  每个工作组的共享本地内存: " << local_mem_size << " 字节\n";
+    builder << "  GPU 内存大小: " << global_mem_size << " B (" << std::fixed << std::setprecision(2)
+            << (double)global_mem_size / 1024 / 1024 / 1024 << " GB)\n";
+    builder << "  每个工作组的共享本地内存: " << local_mem_size << " B\n";
     builder << "  最大工作组大小: " << max_work_group_size << "\n";
     builder << "  支持的子组大小:";
     for (size_t i = 0; i < sub_group_sizes.size(); i++) builder << " " << sub_group_sizes[i];
diff --git a/libs/CMakeLists.txt b/libs/CMakeLists.txt
index 9cba6ed..057638a 100644
--- a/libs/CMakeLists.txt
+++ b/libs/CMakeLists.txt
@@ -5,12 +5,12 @@ set(LOCAL_B14LIBS "")
 foreach(CPP_FILE ${CPP_FILES})
   # name without .cpp
   get_filename_component(TARGET_NAME ${CPP_FILE} NAME_WE)
-  message(STATUS "Add lib: ${TARGET_NAME}")
+  message(STATUS "Add CPP lib: ${TARGET_NAME}")
   add_library(${TARGET_NAME} STATIC ${CPP_FILE})
 
   set_target_properties(${TARGET_NAME} PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS}")
   set_target_properties(${TARGET_NAME} PROPERTIES LINK_FLAGS "${LINK_FLAGS}")
-  
+
   list(APPEND LOCAL_B14LIBS ${TARGET_NAME})
 endforeach()
 
diff --git a/libs/test_kernels.cpp b/libs/test_kernels.cpp
new file mode 100644
index 0000000..94d9a73
--- /dev/null
+++ b/libs/test_kernels.cpp
@@ -0,0 +1,14 @@
+#include <stdint.h>
+
+#include <sycl/sycl.hpp>
+
+#include "test.hpp"
+
+SYCL_EXTERNAL uint8_t base16384::test::kernels_basic(uint8_t in) {
+  in *= in;
+  in %= 251;
+  in ^= in >> 2;
+  in += 17;
+  in *= 3;
+  return in ^ (in << 1);
+}
\ No newline at end of file
diff --git a/tests/basic.cpp b/tests/basic.cpp
index 64f272d..7b2a4ef 100644
--- a/tests/basic.cpp
+++ b/tests/basic.cpp
@@ -14,6 +14,7 @@
 #include <vector>
 
 #include "errors.hpp"
+#include "test.hpp"
 #include "xeinfo.hpp"
 
 constexpr int iter_count = 65536;
@@ -67,13 +68,7 @@ int main() {
   auto start_time = std::chrono::high_resolution_clock::now();
   for (int j = 0; j < iter_count; j++) {
     for (auto& byte : cpu_data) {
-      // 复杂计算：多步数学运算组合
-      uint8_t temp = byte;
-      temp = (temp * temp) % 251;  // 使用质数避免快速收敛
-      temp = temp ^ (temp >> 2);   // 位运算
-      temp = (temp + 17) % 256;    // 加法和模运算
-      temp = temp * 3 % 256;       // 乘法
-      byte = temp ^ (temp << 1);   // 最终位运算
+      byte = base16384::test::kernels_basic(byte);
     }
   }
   auto end_time = std::chrono::high_resolution_clock::now();
@@ -91,15 +86,8 @@ int main() {
   start_time = std::chrono::high_resolution_clock::now();
   auto errn = base16384::errors::try_failed([&]() {
     for (int j = 0; j < iter_count; j++) {
-      q.parallel_for(sycl::range<1>(N), [=](sycl::id<1> i) {
-        // 复杂计算：多步数学运算组合
-        uint8_t temp = data[i];
-        temp = (temp * temp) % 251;    // 使用质数避免快速收敛
-        temp = temp ^ (temp >> 2);     // 位运算
-        temp = (temp + 17) % 256;      // 加法和模运算
-        temp = temp * 3 % 256;         // 乘法
-        data[i] = temp ^ (temp << 1);  // 最终位运算
-      });
+      q.parallel_for(sycl::range<1>(N),
+                     [=](sycl::id<1> i) { data[i] = base16384::test::kernels_basic(data[i]); });
     }
     q.wait();
   });
@@ -120,13 +108,7 @@ int main() {
       q.parallel_for(sycl::nd_range<1>(N, work_group_size),
                      [=](sycl::nd_item<1> item) {  // sub-group size
                        const auto i = item.get_global_id(0);
-                       // 复杂计算：多步数学运算组合
-                       uint8_t temp = data[i];
-                       temp = (temp * temp) % 251;    // 使用质数避免快速收敛
-                       temp = temp ^ (temp >> 2);     // 位运算
-                       temp = (temp + 17) % 256;      // 加法和模运算
-                       temp = temp * 3 % 256;         // 乘法
-                       data[i] = temp ^ (temp << 1);  // 最终位运算
+                       data[i] = base16384::test::kernels_basic(data[i]);
                      });
     }
     q.wait();