[TensorFlow Lite label_image] Abort occurs with xnnpack_delegate option.

[NobuoTsukamoto]

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Issue Type

Bug

Source

source

Tensorflow Version

v2.9.1 (or master)

Custom Code

No

OS Platform and Distribution

Raspberry Pi OS (bullseye)

Mobile device

No response

Python version

No response

Bazel version

No response

GCC/Compiler version

gcc version 10.2.1 20210110 (Debian 10.2.1-6)

CUDA/cuDNN version

No response

GPU model and memory

No response

Current Behaviour?

Build tensorflow-lite and label_image from source (with CMake).
Execute with the `--xnnpack_delegate` option.

label_image \
  --tflite_model /tmp/mobilenet_v1_1.0_224.tflite \
  --labels /tmp/labels.txt \
  --image tensorflow/lite/examples/label_image/testdata/grace_hopper.bmp \
  --xnnpack_delegate 1
Type mismatch while accessing parameter.
Abort

### Standalone code to reproduce the issue

```shell
Clone repository.

git clone -b v2.9.1 https://github.com/tensorflow/tensorflow.git

Build tensorflow-lite and label_image

mkdir build && cd build
cmake ../tensorflow/tensorflow/lite/
cmake --build . -j$(nproc)
cmake --build . -j$(nproc) -t label_image

Download tflite model

wget https://storage.googleapis.com/download.tensorflow.org/models/mobilenet_v1_2018_02_22/mobilenet_v1_1.0_224.tgz
tar xf mobilenet_v1_1.0_224.tgz
wget  https://storage.googleapis.com/download.tensorflow.org/models/mobilenet_v1_1.0_224_frozen.tgz
tar xf mobilenet_v1_1.0_224_frozen.tgz
cp mobilenet_v1_1.0_224/labels.txt ./

Exec label_image (with use_xnnpack option)

./examples/label_image/label_image \
  --tflite_model ./mobilenet_v1_1.0_224.tflite \
  --labels ./labels.txt \
  --image ../tensorflow/tensorflow/lite/examples/label_image/testdata/grace_hopper.bmp

### Relevant log output

_No response_</details>

[NobuoTsukamoto]

Abort is caused by the following code in label_image.
https://github.com/tensorflow/tensorflow/blob/v2.9.1/tensorflow/lite/examples/label_image/label_image.cc#L129

The correct type of num_threads is int32_t, not bool.
https://github.com/tensorflow/tensorflow/blob/v2.9.1/tensorflow/lite/tools/delegates/default_execution_provider.cc#L30

This error occurs on Raspberry Pi OS 64bit (bullseye) and Fedora 36.
On Ubuntu 22.04, the process is completed without Abort. For unknown reasons, xnnpack delegate does not take effect. It may be one of the possibilities of #55476.

[mohantym]

Hi @NobuoTsukamoto ! Thanks for reporting this bug. This issue will be closed once PR #56369 is merged.

[google-ml-butler]

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