Cannot map CUDA interop buffers

Gaming and Visualization Technologies Visualization OptiX
1

I get the following error on launch:

Invalid context (Details: Function "_rtContextLaunch1D" caught exception: Cannot map CUDA interop buffers, [14614601])
  • using GTX 980 + GTX 670 (not used), Win7 64bit, Visual Studio 12 64bit, cuda 7,
  • when setting the vertex/index buffer names for the Sbvh builder. Without setting these, everything seems to work fine.
  • using this code:
void Optix::init(	int const idevice	, ::glm::vec3 const* const vertexbuffer	, int const numVertices	, ::glm::ivec3 const* const indexbuffer	, int const numIndices	, gl::Texture const& positions	)	{	try {	using detail::ptxpath;	using namespace ::gpu;	m_context = optix::Context::create();	this->idevice = idevice;	// set device	m_context->setDevices(&idevice, &idevice+1);	cutsizes = m_context->createBufferForCUDA(RT_BUFFER_INPUT, RT_FORMAT_INT);	m_context["cutsizes"]->setBuffer(cutsizes);	data = m_context->createBufferForCUDA(RT_BUFFER_INPUT_OUTPUT, RT_FORMAT_UNSIGNED_INT);	m_context["data"]->setBuffer(data); //initialized later	m_context->setRayTypeCount(1);	m_context->setEntryPointCount(1);	m_context->setRayGenerationProgram(0, m_context->createProgramFromPTXFile(detail::ptxpath("shadow_request"), "shadow_request"));	m_context->setExceptionProgram(0, m_context->createProgramFromPTXFile(detail::ptxpath("shadow_request"), "exception"));	m_context->setMissProgram(0, m_context->createProgramFromPTXFile(detail::ptxpath("shadow_request"), "miss"));	optix::Material opaque = m_context->createMaterial();	opaque->setAnyHitProgram(0, m_context->createProgramFromPTXFile(detail::ptxpath("shadow_request"), "any_hit"));	auto vb = m_context->createBufferForCUDA(RT_BUFFER_INPUT);	{	vb->setFormat(RT_FORMAT_FLOAT3);	auto const ptr = vertexbuffer;	MLIB_ERROR_ASSERT(ptr);	auto const p = reinterpret_cast<CUdeviceptr>(ptr);	vb->setDevicePointer(idevice, p);	vb->setSize(numVertices);	vb->validate();	}	auto index_buffer = m_context->createBufferForCUDA(RT_BUFFER_INPUT);	{	index_buffer->setFormat(RT_FORMAT_INT3);	auto const ptr = indexbuffer;	MLIB_ERROR_ASSERT(ptr);	auto const p = reinterpret_cast<CUdeviceptr>(ptr);	index_buffer->setDevicePointer(idevice, p);	index_buffer->setSize(numIndices);	index_buffer->validate();	}	//mesh	auto geo = m_context->createGeometry();	geo->setPrimitiveCount(numIndices);	geo["vb"]->setBuffer(vb);	geo["ib"]->setBuffer(index_buffer);	geo->setIntersectionProgram(	m_context->createProgramFromPTXFile(ptxpath("triangle_mesh_small"), "mesh_intersect")	);	geo->setBoundingBoxProgram(	m_context->createProgramFromPTXFile(ptxpath("triangle_mesh_small"), "mesh_bounds")	);	auto const beg = &opaque;	auto const end = &opaque + 1;	auto instance = m_context->createGeometryInstance(geo, beg, end);	instance->setMaterialCount(end - beg);	for (auto i = 0; i < end - beg; ++i)	{	instance->setMaterial(i, beg[i]);	}	auto geogroup = m_context->createGeometryGroup();	geogroup->setChildCount(1);	geogroup->setChild(0, instance);	auto accel = m_context->createAcceleration("Sbvh", "Bvh");	//auto accel = m_context->createAcceleration("NoAccel", "NoAccel"); // if enabled, fails, otherwise just works	accel->setProperty("vertex_buffer_name", "vb");	accel->setProperty("index_buffer_name", "ib");	geogroup->setAcceleration(accel);	accel->markDirty();	accel->validate();	m_context["shadow_casters"]->set(geogroup);	}	catch (optix::Exception& e)	{	MLIB_ERROR_SIGNAL(::mlib::error::Exception(e.getErrorString()));	}	}

Also, the exact same vertex/index buffers just work when using optix prime:

void init(	::cuda::Context const* const context	, int const numTriangles	, ::glm::ivec3 const* const indices	, int const numVertices	, ::glm::vec3 const* const vertices	)	{	try {	using namespace ::gpu;	using namespace optix::prime;	using namespace ::glm;	rtContext = optix::prime::Context::create(RTP_CONTEXT_TYPE_CUDA);	auto const device = unsigned(context->deviceId);	rtContext->setCudaDeviceNumbers(1, &device);	auto inds = rtContext->createBufferDesc(	RTP_BUFFER_FORMAT_INDICES_INT3	, RTP_BUFFER_TYPE_CUDA_LINEAR	, const_cast<ivec3*>(indices)	);	inds->setRange(0, numTriangles);	auto verts = rtContext->createBufferDesc(	RTP_BUFFER_FORMAT_VERTEX_FLOAT3	, RTP_BUFFER_TYPE_CUDA_LINEAR	, const_cast<vec3*>(vertices)	);	verts->setRange(0, numVertices);	model = rtContext->createModel();	model->setTriangles(inds, verts);	model->update(RTP_MODEL_HINT_NONE);	}	catch (optix::prime::Exception& e)	{	MLIB_ERROR_SIGNAL(::mlib::error::Exception(e.getErrorString()));	}	}

The buffers are pure CUDA buffers.

Any idea what might be going wrong here?

2

can you provide a Short, Self Contained, Compilable Example?