diff --git a/modules/gpu/perf/main.cpp b/modules/gpu/perf/perf_main.cpp
similarity index 96%
rename from modules/gpu/perf/main.cpp
rename to modules/gpu/perf/perf_main.cpp
index 8af255b78..4a7dd7795 100644
--- a/modules/gpu/perf/main.cpp
+++ b/modules/gpu/perf/perf_main.cpp
@@ -1,137 +1,137 @@
-#include "perf_precomp.hpp"
-
-using namespace std;
-using namespace cv;
-using namespace cv::gpu;
-using namespace cvtest;
-using namespace testing;
-
-void printOsInfo()
-{
-#if defined _WIN32
-#   if defined _WIN64
-        cout << "OS: Windows x64 \n" << endl;
-#   else
-        cout << "OS: Windows x32 \n" << endl;
-#   endif
-#elif defined linux
-#   if defined _LP64
-        cout << "OS: Linux x64 \n" << endl;
-#   else
-        cout << "OS: Linux x32 \n" << endl;
-#   endif
-#elif defined __APPLE__
-#   if defined _LP64
-        cout << "OS: Apple x64 \n" << endl;
-#   else
-        cout << "OS: Apple x32 \n" << endl;
-#   endif
-#endif
-}
-
-void printCudaInfo()
-{
-#if !defined HAVE_CUDA || defined(CUDA_DISABLER)
-    cout << "OpenCV was built without CUDA support \n" << endl;
-#else
-    int driver;
-    cudaDriverGetVersion(&driver);
-
-    cout << "CUDA Driver  version: " << driver << '\n';
-    cout << "CUDA Runtime version: " << CUDART_VERSION << '\n';
-
-    cout << endl;
-
-    cout << "GPU module was compiled for the following GPU archs:" << endl;
-    cout << "    BIN: " << CUDA_ARCH_BIN << '\n';
-    cout << "    PTX: " << CUDA_ARCH_PTX << '\n';
-
-    cout << endl;
-
-    int deviceCount = getCudaEnabledDeviceCount();
-    cout << "CUDA device count: " << deviceCount << '\n';
-
-    cout << endl;
-
-    for (int i = 0; i < deviceCount; ++i)
-    {
-        DeviceInfo info(i);
-
-        cout << "Device [" << i << "] \n";
-        cout << "\t Name: " << info.name() << '\n';
-        cout << "\t Compute capability: " << info.majorVersion() << '.' << info.minorVersion()<< '\n';
-        cout << "\t Multi Processor Count: " << info.multiProcessorCount() << '\n';
-        cout << "\t Total memory: " << static_cast<int>(static_cast<int>(info.totalMemory() / 1024.0) / 1024.0) << " Mb \n";
-        cout << "\t Free  memory: " << static_cast<int>(static_cast<int>(info.freeMemory() / 1024.0) / 1024.0) << " Mb \n";
-        if (!info.isCompatible())
-            cout << "\t !!! This device is NOT compatible with current GPU module build \n";
-
-        cout << endl;
-    }
-#endif
-}
-
-int main(int argc, char** argv)
-{
-    const std::string keys =
-            "{ h help ? |   | Print help}"
-            "{ i info   |   | Print information about system and exit }"
-            "{ device   | 0 | Device on which tests will be executed }"
-            "{ cpu      |   | Run tests on cpu }"
-            ;
-
-    CommandLineParser cmd(argc, (const char**) argv, keys);
-
-    if (cmd.has("help"))
-    {
-        cmd.printMessage();
-        return 0;
-    }
-
-    printOsInfo();
-    printCudaInfo();
-
-
-    if (cmd.has("info"))
-    {
-        return 0;
-    }
-
-    int device = cmd.get<int>("device");
-    bool cpu   = cmd.has("cpu");
-#if !defined HAVE_CUDA || defined(CUDA_DISABLER)
-    cpu = true;
-#endif
-
-    if (cpu)
-    {
-        runOnGpu = false;
-
-        cout << "Run tests on CPU \n" << endl;
-    }
-    else
-    {
-        runOnGpu = true;
-
-        if (device < 0 || device >= getCudaEnabledDeviceCount())
-        {
-            cerr << "Incorrect device index - " << device << endl;
-            return -1;
-        }
-
-        DeviceInfo info(device);
-        if (!info.isCompatible())
-        {
-            cerr << "Device " << device << " [" << info.name() << "] is NOT compatible with current GPU module build" << endl;
-            return -1;
-        }
-
-        setDevice(device);
-
-        cout << "Run tests on device " << device << " [" << info.name() << "] \n" << endl;
-    }
-
-    InitGoogleTest(&argc, argv);
-    perf::TestBase::Init(argc, argv);
-    return RUN_ALL_TESTS();
-}
+#include "perf_precomp.hpp"
+
+using namespace std;
+using namespace cv;
+using namespace cv::gpu;
+using namespace cvtest;
+using namespace testing;
+
+void printOsInfo()
+{
+#if defined _WIN32
+#   if defined _WIN64
+        cout << "OS: Windows x64 \n" << endl;
+#   else
+        cout << "OS: Windows x32 \n" << endl;
+#   endif
+#elif defined linux
+#   if defined _LP64
+        cout << "OS: Linux x64 \n" << endl;
+#   else
+        cout << "OS: Linux x32 \n" << endl;
+#   endif
+#elif defined __APPLE__
+#   if defined _LP64
+        cout << "OS: Apple x64 \n" << endl;
+#   else
+        cout << "OS: Apple x32 \n" << endl;
+#   endif
+#endif
+}
+
+void printCudaInfo()
+{
+#if !defined HAVE_CUDA || defined(CUDA_DISABLER)
+    cout << "OpenCV was built without CUDA support \n" << endl;
+#else
+    int driver;
+    cudaDriverGetVersion(&driver);
+
+    cout << "CUDA Driver  version: " << driver << '\n';
+    cout << "CUDA Runtime version: " << CUDART_VERSION << '\n';
+
+    cout << endl;
+
+    cout << "GPU module was compiled for the following GPU archs:" << endl;
+    cout << "    BIN: " << CUDA_ARCH_BIN << '\n';
+    cout << "    PTX: " << CUDA_ARCH_PTX << '\n';
+
+    cout << endl;
+
+    int deviceCount = getCudaEnabledDeviceCount();
+    cout << "CUDA device count: " << deviceCount << '\n';
+
+    cout << endl;
+
+    for (int i = 0; i < deviceCount; ++i)
+    {
+        DeviceInfo info(i);
+
+        cout << "Device [" << i << "] \n";
+        cout << "\t Name: " << info.name() << '\n';
+        cout << "\t Compute capability: " << info.majorVersion() << '.' << info.minorVersion()<< '\n';
+        cout << "\t Multi Processor Count: " << info.multiProcessorCount() << '\n';
+        cout << "\t Total memory: " << static_cast<int>(static_cast<int>(info.totalMemory() / 1024.0) / 1024.0) << " Mb \n";
+        cout << "\t Free  memory: " << static_cast<int>(static_cast<int>(info.freeMemory() / 1024.0) / 1024.0) << " Mb \n";
+        if (!info.isCompatible())
+            cout << "\t !!! This device is NOT compatible with current GPU module build \n";
+
+        cout << endl;
+    }
+#endif
+}
+
+int main(int argc, char** argv)
+{
+    const std::string keys =
+            "{ h help ? |   | Print help}"
+            "{ i info   |   | Print information about system and exit }"
+            "{ device   | 0 | Device on which tests will be executed }"
+            "{ cpu      |   | Run tests on cpu }"
+            ;
+
+    CommandLineParser cmd(argc, (const char**) argv, keys);
+
+    if (cmd.has("help"))
+    {
+        cmd.printMessage();
+        return 0;
+    }
+
+    printOsInfo();
+    printCudaInfo();
+
+
+    if (cmd.has("info"))
+    {
+        return 0;
+    }
+
+    int device = cmd.get<int>("device");
+    bool cpu   = cmd.has("cpu");
+#if !defined HAVE_CUDA || defined(CUDA_DISABLER)
+    cpu = true;
+#endif
+
+    if (cpu)
+    {
+        runOnGpu = false;
+
+        cout << "Run tests on CPU \n" << endl;
+    }
+    else
+    {
+        runOnGpu = true;
+
+        if (device < 0 || device >= getCudaEnabledDeviceCount())
+        {
+            cerr << "Incorrect device index - " << device << endl;
+            return -1;
+        }
+
+        DeviceInfo info(device);
+        if (!info.isCompatible())
+        {
+            cerr << "Device " << device << " [" << info.name() << "] is NOT compatible with current GPU module build" << endl;
+            return -1;
+        }
+
+        setDevice(device);
+
+        cout << "Run tests on device " << device << " [" << info.name() << "] \n" << endl;
+    }
+
+    InitGoogleTest(&argc, argv);
+    perf::TestBase::Init(argc, argv);
+    return RUN_ALL_TESTS();
+}