feat: Wrap dynamic size handling in a compilation flag by peri044 · Pull Request #1851 · pytorch/TensorRT

peri044 · 2023-04-21T19:57:53Z

Description

This PR does the following

The aten::size dynamic shape handling is now disabled by default. allow_shape_tensors=True will enable it.
Modifications to aten::size include preserving the static dimensions in the input, thereby not converting any known types eg: Int into ITensors

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Bug fix (non-breaking change which fixes an issue)
New feature (non-breaking change which adds functionality)
Breaking change (fix or feature that would cause existing functionality to not work as expected)
This change requires a documentation update

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My code follows the style guidelines of this project (You can use the linters)
I have performed a self-review of my own code
I have commented my code, particularly in hard-to-understand areas and hacks
I have made corresponding changes to the documentation
I have added tests to verify my fix or my feature
New and existing unit tests pass locally with my changes
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bowang007

LGTM

bowang007 · 2023-04-21T21:41:06Z

core/conversion/evaluators/prim.cpp

               const torch::jit::IValue* outputs = args.at(n->input()).IValue();
               auto outputVec = outputs->toList().vec();
+               LOG_DEBUG("==== OUTPUT VEC: " << outputVec);
+               TORCHTRT_THROW_ERROR("========= FORCED ERROR ");


These 2 lines need to be removed

bowang007 · 2023-04-21T21:41:42Z

core/conversion/evaluators/prim.cpp

               // Outputs is an IValue which has list of tensors which can be found in ctx->evaluated_value_map
               const torch::jit::IValue* outputs = args.at(n->input()).IValue();
               auto outputVec = outputs->toList().vec();
+               LOG_DEBUG("==== OUTPUT VEC: " << outputVec);


remove this line

…en::size Signed-off-by: Dheeraj Peri <peri.dheeraj@gmail.com> chore: Add allow-shape-tensors option to torchtrtc, preserve static dimensions in the aten::size layer Signed-off-by: Dheeraj Peri <peri.dheeraj@gmail.com> chore: Linter fixes Signed-off-by: Dheeraj Peri <peri.dheeraj@gmail.com> chore: remove debug throw error Signed-off-by: Dheeraj Peri <peri.dheeraj@gmail.com>

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narendasan · 2023-05-12T18:25:08Z

core/conversion/evaluators/aten.cpp

+                     if (ctx->settings.allow_shape_tensors) {
+                       return dynamic_size_layer(ctx, n, args);
+                     } else {
+                       LOG_WARNING("There may be undefined behavior using dynamic shape and aten::size ");


Is this undefined behavior due to using aten::size with dynamic shape without shape tensors or the other way around. Might need rewording

narendasan · 2023-05-12T18:27:47Z

core/conversion/evaluators/aten.cpp

                   auto tensor = tensor_var.ITensor();
                   if (ctx->input_is_dynamic) {
-                     return dynamic_size_layer(ctx, n, args);
+                     if (ctx->settings.allow_shape_tensors) {


We should be checking if input is dynamic, shape tensors are enabled and the input contains a placeholder dimension before using the shape tensor code path. Otherwise static aten size is sufficient and will cause less errors

narendasan · 2023-05-12T18:29:32Z

core/conversion/evaluators/aten.cpp

                 if (tensor_var.isITensor()) {
                   if (ctx->input_is_dynamic) {
-                     return dynamic_size_layer(ctx, n, args);
+                     if (ctx->settings.allow_shape_tensors) {


Same comments here from above about conditions and warnings

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feat: Wrap dynamic size handling in a compilation flag

peri044 requested a review from narendasan April 21, 2023 19:57

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peri044 force-pushed the exp_size branch from 69472db to c8f285f Compare April 21, 2023 20:03

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peri044 force-pushed the exp_size branch from c8f285f to 105c892 Compare April 21, 2023 23:05

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Christina-Young-NVIDIA added the release: v1.4 Tagged to be included in v1.4 label Apr 24, 2023

github-actions bot requested a review from bowang007 April 24, 2023 20:28

bowang007 approved these changes May 12, 2023

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bowang007 force-pushed the exp_size branch from 105c892 to 2e2e292 Compare May 12, 2023 00:15

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narendasan requested changes May 12, 2023

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chore: rewording warning message

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bowang007 merged commit fcb6890 into main May 15, 2023

bowang007 added a commit that referenced this pull request May 15, 2023

Merge pull request #1851 from pytorch/exp_size

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feat: Wrap dynamic size handling in a compilation flag

gs-olive mentioned this pull request May 16, 2023

🐛 [Bug] Compilation failure for SSD300 model with dynamic batch #1555

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peri044 commented Apr 21, 2023

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