added --cpu flag (run tests on CPU)

modules/gpu/perf/main.cpp

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

modules/gpu/perf/perf_utility.cpp

@@ -4,6 +4,8 @@ using namespace std;
 using namespace cv;
 using namespace cv::gpu;
 
+bool runOnGpu = true;
+
 void fillRandom(Mat& m, double a, double b)
 {
     RNG rng(123456789);

modules/gpu/perf/perf_utility.hpp

@@ -6,6 +6,8 @@
 #include "opencv2/imgproc/imgproc.hpp"
 #include "opencv2/ts/ts_perf.hpp"
 
+extern bool runOnGpu;
+
 void fillRandom(cv::Mat& m, double a = 0.0, double b = 255.0);
 cv::Mat readImage(const std::string& fileName, int flags = cv::IMREAD_COLOR);