Trying to run sample script on Raspberry Pi 3

[Bravo13]

SO, I'm trying to run example from page https://documen.tician.de/pyopencl/index.html on RPi 3 with VC4C. Mine clinfo shows I have video core. Also, simple C program works ok. But with python mine program stuck. If I'm running exactly as on example, it hangs on cl.enqueue_copy(queue, res_np, res_g) line. If I'm adding .wait() to knl(queue, a_np.shape, None, a_g, b_g, res_g) it hangs there. Need advice on what possible solution coudl be here or is it possible to look for anu debug data

[inducer]

Some things to try:

• set the environment variable PYOPENCL_NO_CACHE=1.
• Build PyOpenCL with tracing: In the source directory, do ./configure.py --cl-trace, rm -Rf build, pip install .. This will show you which CL call hangs.

[Bravo13]

Hey @inducer thanks for your fast reply. Result:

• adding PYOPENCL_NO_CACHE=1 did not change anything
• building with --cl-trace produce next logclGetPlatformIDs
  clGetPlatformIDs
  clGetPlatformInfo
  clGetPlatformInfo
  Choose platform:
  [0] <pyopencl.Platform 'OpenCL for the Raspberry Pi VideoCore IV GPU' at 0x129518c>
  Choice [0]:clGetDeviceIDs
  clGetDeviceIDs
  clCreateContext
  clGetContextInfo
  clGetContextInfo
  clGetContextInfo
  clGetContextInfo
  clGetDeviceInfo
  clGetPlatformInfo
  clGetPlatformInfo
  clCreateCommandQueue
  clCreateBuffer
  gpuserv: vc_gpuserv_init: starting initialisation
  clCreateBuffer
  clGetContextInfo
  clGetContextInfo
  clGetDeviceInfo
  clGetPlatformInfo
  clGetPlatformInfo
  clCreateProgramWithSource
  clBuildProgram
  clGetProgramInfo
  clGetProgramInfo
  clGetProgramBuildInfo
  clGetProgramBuildInfo
  clCreateBuffer
  clCreateKernel
  clGetKernelInfo
  clGetKernelInfo
  clGetKernelInfo
  clGetKernelInfo
  clGetKernelInfo
  clRetainContext
  clGetContextInfo
  clGetContextInfo
  clReleaseContext
  clGetDeviceInfo
  clGetDeviceInfo
  clGetDeviceInfo
  clGetPlatformInfo
  clGetPlatformInfo
  clGetKernelInfo
  clSetKernelArg
  clSetKernelArg
  clSetKernelArg
  clEnqueueNDRangeKernel
  clReleaseEvent
  clGetMemObjectInfo
  clEnqueueReadBuffer

[Bravo13]

Just found there is some additional debug from VC4CL with VC4CL_DEBUG=events,execution PYOPENCL_NO_CACHE=1 python test.py So, I attached new log(too big to put in message, I suppose). Have a feeling it's not a problem of PyOpenCl itself, but some conditions that makes vc4cl fail.
log.txt
test.py.txt

[Bravo13]

And after 5000000000 us log looks like this(see attachements)
log.txt