[Relay][Frontend][Onnx] Loop Support #6700
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@masahi @mbrookhart @csullivan @soiferj Can you guys help review this PR? |
masahi
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Oct 20, 2020
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Thanks @jwfromm |
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Oct 29, 2020
* Onnx loop almost working, checkpointing for safety. * Very close to working. * Last piece is fixing scan initialization. * snapshotting for debug. * Fix Josh's issue * Use subgraph proto class. * Loop with scan. * Simple loop test now working. * Scan outputs now working. * Added second loop test. * Removed unneeded helper functions. * Remove bad merge artifact. * Cleaned up scan output creation. * Cleaned up some style mistakes. * Add pylint skip for unused-argument. * Remove onnx dependency. * Remove now obsolete checks for 0 shaped tensors. Co-authored-by: Jared Roesch <jroesch@octoml.ai>
trevor-m
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Dec 2, 2020
* Onnx loop almost working, checkpointing for safety. * Very close to working. * Last piece is fixing scan initialization. * snapshotting for debug. * Fix Josh's issue * Use subgraph proto class. * Loop with scan. * Simple loop test now working. * Scan outputs now working. * Added second loop test. * Removed unneeded helper functions. * Remove bad merge artifact. * Cleaned up scan output creation. * Cleaned up some style mistakes. * Add pylint skip for unused-argument. * Remove onnx dependency. * Remove now obsolete checks for 0 shaped tensors. Co-authored-by: Jared Roesch <jroesch@octoml.ai>
trevor-m
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Dec 4, 2020
* Onnx loop almost working, checkpointing for safety. * Very close to working. * Last piece is fixing scan initialization. * snapshotting for debug. * Fix Josh's issue * Use subgraph proto class. * Loop with scan. * Simple loop test now working. * Scan outputs now working. * Added second loop test. * Removed unneeded helper functions. * Remove bad merge artifact. * Cleaned up scan output creation. * Cleaned up some style mistakes. * Add pylint skip for unused-argument. * Remove onnx dependency. * Remove now obsolete checks for 0 shaped tensors. Co-authored-by: Jared Roesch <jroesch@octoml.ai>
trevor-m
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Dec 4, 2020
* Onnx loop almost working, checkpointing for safety. * Very close to working. * Last piece is fixing scan initialization. * snapshotting for debug. * Fix Josh's issue * Use subgraph proto class. * Loop with scan. * Simple loop test now working. * Scan outputs now working. * Added second loop test. * Removed unneeded helper functions. * Remove bad merge artifact. * Cleaned up scan output creation. * Cleaned up some style mistakes. * Add pylint skip for unused-argument. * Remove onnx dependency. * Remove now obsolete checks for 0 shaped tensors. Co-authored-by: Jared Roesch <jroesch@octoml.ai>
kevinLu1114
reviewed
Jun 6, 2021
| loop_var_names = [v.name_hint for v in loop_vars] | ||
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| num_scan_outputs = len(body.output) - (1 + num_deps) | ||
| # TODO (jwfromm) Test with strided slice once type unifier for this case is fixed. |
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Hi @jwfromm
Did you make this?
I got some error.
I'm not sure if it is because of this.
Can you help me please
The model is mobilenetv1-SSD like this:
https://github.com/onnx/models/blob/master/vision/object_detection_segmentation/ssd-mobilenetv1/model/ssd_mobilenet_v1_10.onnx
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This PR adds a converter for Loop operators in Onnx. Loops in onnx are represented as entire onnx graphs embedded within the op. To support this structure, there are few changes to the GraphProto class to allow access to the parent graph from a called subgraph using scope. It's worth noting that I encountered some issues with type unification when strided slices were part of the subgraph. For now, I've added a warning that indicates errors might occur in this case, but will add corresponding tests once the issue is resolved.