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Print an error message to stderr when the initialization of the CUDA runtime fails. This helps debugging setup issues.

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This commit is contained in:
Benoit Steiner 2016-02-19 13:44:22 -08:00
parent 670db7988d
commit 46fc23f91c
1 changed files with 14 additions and 3 deletions
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13
unsupported/Eigen/CXX11/src/Tensor/TensorDeviceCuda.h
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@ -34,13 +34,24 @@ static void initializeDeviceProp() {
if (!m_devicePropInitialized) { if (!m_devicePropInitialized) {
int num_devices; int num_devices;
cudaError_t status = cudaGetDeviceCount(&num_devices); cudaError_t status = cudaGetDeviceCount(&num_devices);
EIGEN_UNUSED_VARIABLE(status) if (status != cudaSuccess) {
std::cerr << "Failed to get the number of CUDA devices: "
<< cudaGetErrorString(status)
<< std::endl;
assert(status == cudaSuccess); assert(status == cudaSuccess);
}
m_deviceProperties = new cudaDeviceProp[num_devices]; m_deviceProperties = new cudaDeviceProp[num_devices];
for (int i = 0; i < num_devices; ++i) { for (int i = 0; i < num_devices; ++i) {
status = cudaGetDeviceProperties(&m_deviceProperties[i], i); status = cudaGetDeviceProperties(&m_deviceProperties[i], i);
if (status != cudaSuccess) {
std::cerr << "Failed to initialize CUDA device #"
<< i
<< ": "
<< cudaGetErrorString(status)
<< std::endl;
assert(status == cudaSuccess); assert(status == cudaSuccess);
} }
}
m_devicePropInitialized = true; m_devicePropInitialized = true;
} }
} }