Convert Mask-RCNN in PyTorch to TensorRT (SplitToSequence)

AI & Data Science Deep Learning (Training & Inference) TensorRT
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1

Description

Hi, I tried to convert Mask-RCNN from PyTorch to TensorRT engine but I got an error.

Environment

TensorRT Version:
GPU Type: Quadro RTX 6000
Nvidia Driver Version: 460.27.04
CUDA Version: 10.1
CUDNN Version:
Operating System + Version: Ubuntu 18.04
Python Version (if applicable): 3.6.9
TensorFlow Version (if applicable):
PyTorch Version (if applicable): 1.6.0
Baremetal or Container (if container which image + tag): nvcr.io/nvidia/pytorch:20.12-py3

Relevant Files

https://drive.google.com/file/d/1IqY2-YXFg88rjsPc4oWvmEiRLbK5koJn/view?usp=sharing
onnx_model

Steps To Reproduce

  1. First, I implemented MaskRCNN from PyTorch library and converted it to ONNX format with attached script (in my environment).

  2. Then, when I was trying convert it to TensorRT in NVIDIA docker I met this error, so I run from terminal:

$ polygraphy surgeon sanitize model.onnx --fold-constants --output model_folded.onnx

  1. In the end, when I was trying convert folded model I got this error:

[I] [TRT] /workspace/TensorRT/parsers/onnx/ModelImporter.cpp:139: No importer registered for op: SplitToSequence. Attempting to import as plugin.
[I] [TRT] /workspace/TensorRT/parsers/onnx/builtin_op_importers.cpp:3716: Searching for plugin: SplitToSequence, plugin_version: 1, plugin_namespace:
[E] [TRT] INVALID_ARGUMENT: getPluginCreator could not find plugin SplitToSequence version 1
While parsing node number 339 [SplitToSequence]:
ERROR: /workspace/TensorRT/parsers/onnx/builtin_op_importers.cpp:3718 In function importFallbackPluginImporter:
[8] Assertion failed: creator && “Plugin not found, are the plugin name, version, and namespace correct?”

I used this command (in NVIDIA docker) to convert the model:

$ trtexec --onnx=model_folded.onnx --explicitBatch --fp16 --workspace=64 --minShapes=input:1x3x720x1280 --optShapes=input:1x3x720x1280 --maxShapes=input:1x3x720x1280 --buildOnly --saveEngine=mask.engine

Will this plugin be supported in the near future? Or did I something wrong while converting?
Thanks

2

Hi,
Request you to share the ONNX model and the script if not shared already so that we can assist you better.
Alongside you can try few things:

  1. validating your model with the below snippet

check_model.py

import sys
import onnx
filename = yourONNXmodel
model = onnx.load(filename)
onnx.checker.check_model(model).
2) Try running your model with trtexec command.
https://github.com/NVIDIA/TensorRT/tree/master/samples/opensource/trtexec
In case you are still facing issue, request you to share the trtexec “”–verbose"" log for further debugging
Thanks!

4

Thanks for your reply! I added onnx models - basic and folded. I also checked onnx models with onnx checker, but it didn’t give me any error. When I run trtexec command with -verbose I got following error:

[V] [TRT] /workspace/TensorRT/parsers/onnx/ModelImporter.cpp:107: Parsing node: SplitToSequence_1141 [SplitToSequence]
[V] [TRT] /workspace/TensorRT/parsers/onnx/ModelImporter.cpp:123: Searching for input: 2396
[V] [TRT] /workspace/TensorRT/parsers/onnx/ModelImporter.cpp:123: Searching for input: 2422
[V] [TRT] /workspace/TensorRT/parsers/onnx/ModelImporter.cpp:129: SplitToSequence_1141 [SplitToSequence] inputs: [2396 → (1, -1)], [2422 → (5)],
[I] [TRT] /workspace/TensorRT/parsers/onnx/ModelImporter.cpp:139: No importer registered for op: SplitToSequence. Attempting to import as plugin.
[I] [TRT] /workspace/TensorRT/parsers/onnx/builtin_op_importers.cpp:3716: Searching for plugin: SplitToSequence, plugin_version: 1, plugin_namespace:
[E] [TRT] INVALID_ARGUMENT: getPluginCreator could not find plugin SplitToSequence version 1
While parsing node number 339 [SplitToSequence → “2423”]:
— Begin node —
input: “2396”
input: “2422”
output: “2423”
name: “SplitToSequence_1141”
op_type: “SplitToSequence”
attribute {
name: “axis”
i: 1
type: INT
}

— End node —
ERROR: /workspace/TensorRT/parsers/onnx/builtin_op_importers.cpp:3718 In function importFallbackPluginImporter:
[8] Assertion failed: creator && “Plugin not found, are the plugin name, version, and namespace correct?”

5

Hi @aleksandra.osztynowicz1,

ONNX parser of TensorRT doesn’t support SplitToSequence operator yet. We recommend you to implement custom plugin for this.
For your reference,

you can check supported operators here onnx-tensorrt/operators.md at main · onnx/onnx-tensorrt · GitHub

Thank you.