OpenCL CL_PROFILING_INFO_NOT_AVAILABLE

[kushpet]

I am using NVIDIA GeForce GTX 1660 SUPER and cuda_11.4.2_471_41_win10.exe and
trying to profile a program like this:

cl_int _err;
const cl_queue_properties _queue_properties = CL_QUEUE_PROFILING_ENABLE;
cl::CommandQueue _queue(FContext, FDevice, &_queue_properties, &_err);
cl::NDRange _offset(0);
cl::NDRange _global_size(1000);
cl::Event _event;
_err  = _queue.enqueueNDRangeKernel(FKernel,
                                    _offset,
                                    _global_size,
                                    cl::NullRange,
                                    nullptr,
                                    &_event);
_event.wait();
const auto _status = _event.getInfo<CL_EVENT_COMMAND_EXECUTION_STATUS>(&_err);
const auto _queued = _event.getProfilingInfo<CL_PROFILING_COMMAND_QUEUED>(&_err);

I get “_status” equal to 0x0 (CL_COMPLETE), but the last line results in _err==-7 - CL_PROFILING_INFO_NOT_AVAILABLE.

The result of getProfilingInfo call is a small number like 4 or 5 and stays the same for all subsequent calls.

What am I doing wrong?

[kushpet]

Thanks to everybody, I found a solution.

The problem was in this definition:

const cl_queue_properties _queue_properties = CL_QUEUE_PROFILING_ENABLE;

Whith this definition queue was created without any properties set. And without any errors reported.

It should have been done this way:

const cl_queue_properties _queue_properties[] = {CL_QUEUE_PROPERTIES, CL_QUEUE_PROFILING_ENABLE, 0};