Error with FPGA flow, Running step: step_apply_folding_config [7/19]

[CNStanLee]

Hey, guys.
I am trying to build the demo ipcore for the Nexys-Video board. Artix-7 Series.
I followed the tutorial and run
./run-docker.sh build_custom ${FINN_ROOT}/tutorials/fpga_flow/
but it stoped at step 7, and the whole echo is like below:

Running step: step_apply_folding_config [7/19]
multiprocessing.pool.RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/home/lic9/prj/devfinn/finn/src/finn/transformation/fpgadataflow/compile_cppsim.py", line 64, in applyNodeLocal
    inst.compile_singlenode_code()
  File "/home/lic9/prj/devfinn/finn/src/finn/custom_op/fpgadataflow/hlscustomop.py", line 408, in compile_singlenode_code
    builder.append_includes("-I{}/include".format(os.environ["HLS_PATH"]))
  File "/usr/lib/python3.10/os.py", line 680, in __getitem__
    raise KeyError(key) from None
KeyError: 'HLS_PATH'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 48, in mapstar
    return list(map(*args))
  File "/home/lic9/prj/devfinn/finn/src/finn/transformation/fpgadataflow/compile_cppsim.py", line 73, in applyNodeLocal
    raise Exception("Custom op_type %s is currently not supported." % op_type)
Exception: Custom op_type LabelSelect_Batch is currently not supported.
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/lic9/prj/devfinn/finn/src/finn/builder/build_dataflow.py", line 158, in build_dataflow_cfg
    model = transform_step(model, cfg)
  File "/home/lic9/prj/devfinn/finn/src/finn/builder/build_dataflow_steps.py", line 434, in step_apply_folding_config
    model = model.transform(CompileCppSim())
  File "/home/lic9/prj/devfinn/finn/deps/qonnx/src/qonnx/core/modelwrapper.py", line 140, in transform
    (transformed_model, model_was_changed) = transformation.apply(transformed_model)
  File "/home/lic9/prj/devfinn/finn/deps/qonnx/src/qonnx/transformation/base.py", line 111, in apply
    new_nodes_and_bool = p.map(self.applyNodeLocal, old_nodes, chunksize=1)
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 367, in map
    return self._map_async(func, iterable, mapstar, chunksize).get()
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 774, in get
    raise self._value
Exception: Custom op_type LabelSelect_Batch is currently not supported.
> /usr/lib/python3.10/multiprocessing/pool.py(774)get()
-> raise self._value
(Pdb) --KeyboardInterrupt--

The env is as below:
Vivado:2023.2
finn:dev branch
board:Nexys Video

Thanks a lot!

[fpjentzsch]

Hi,

the KeyError: 'HLS_PATH' could mean that you did not set FINN_XILINX_PATH and FINN_XILINX_VERSION correctly or did not install Vitis/Vitis HLS next to Vivado.
FINN resolves the paths like this:

  VIVADO_PATH="$FINN_XILINX_PATH/Vivado/$FINN_XILINX_VERSION"
  VITIS_PATH="$FINN_XILINX_PATH/Vitis/$FINN_XILINX_VERSION"
  HLS_PATH="$FINN_XILINX_PATH/Vitis_HLS/$FINN_XILINX_VERSION"

[saionroy]

Is this issue resolved? I am using Vivado 2023.2 and getting the following error:

Building dataflow accelerator from /mnt/c/finn/notebooks/end2end_example/cybersecurity/cybsec-mlp-ready.onnx
Intermediate outputs will be generated in /tmp/finn_dev_saionroy
Final outputs will be generated in output_ipstitch_ooc_rtlsim
Build log is at output_ipstitch_ooc_rtlsim/build_dataflow.log
Running step: step_qonnx_to_finn [1/19]
Running step: step_tidy_up [2/19]
Running step: step_streamline [3/19]
Running step: step_convert_to_hw [4/19]
Running step: step_create_dataflow_partition [5/19]
Running step: step_specialize_layers [6/19]
Running step: step_target_fps_parallelization [7/19]
Running step: step_apply_folding_config [8/19]
Running step: step_minimize_bit_width [9/19]
Running step: step_generate_estimate_reports [10/19]
Running step: step_hw_codegen [11/19]
multiprocessing.pool.RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 48, in mapstar
    return list(map(*args))
  File "/mnt/c/finn/src/finn/transformation/fpgadataflow/hlssynth_ip.py", line 72, in applyNodeLocal
    inst.ipgen_singlenode_code()
  File "/mnt/c/finn/src/finn/custom_op/fpgadataflow/hlsbackend.py", line 181, in ipgen_singlenode_code
    builder.build(code_gen_dir)
  File "/mnt/c/finn/src/finn/util/hls.py", line 57, in build
    assert which("vitis_hls") is not None, "vitis_hls not found in PATH"
AssertionError: vitis_hls not found in PATH
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/mnt/c/finn/src/finn/builder/build_dataflow.py", line 158, in build_dataflow_cfg
    model = transform_step(model, cfg)
  File "/mnt/c/finn/src/finn/builder/build_dataflow_steps.py", line 523, in step_hw_ipgen
    model = model.transform(HLSSynthIP())
  File "/mnt/c/finn/deps/qonnx/src/qonnx/core/modelwrapper.py", line 140, in transform
    (transformed_model, model_was_changed) = transformation.apply(transformed_model)
  File "/mnt/c/finn/deps/qonnx/src/qonnx/transformation/base.py", line 111, in apply
    new_nodes_and_bool = p.map(self.applyNodeLocal, old_nodes, chunksize=1)
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 367, in map
    return self._map_async(func, iterable, mapstar, chunksize).get()
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 774, in get
    raise self._value
AssertionError: vitis_hls not found in PATH
Running step: step_hw_ipgen [12/19]
> /usr/lib/python3.10/multiprocessing/pool.py(774)get()
    772             return self._value
    773         else:
--> 774             raise self._value
    775 
    776     def _set(self, i, obj):

Want to make sure if this is a Vivado and Vitis version issue or a PATH assignment issue. I have set the FINN_XILINX_VERSION to 2023.2 and FINN_XILINX_PATH to "/mnt/c/Xilinx". Using WSL 2 with Ubuntu loaded in it.

[fpjentzsch]

You'll need to install Vivado/Vitis within WSL 2. You cannot use the Windows installation of the tools. Also, FINN is only tested on 2022.2 and 2024.2 at the moment.