fix: Allow full model compilation with collection inputs (input_signature)

README.md

@@ -73,6 +73,7 @@ import torch_tensorrt
 ...
 
 trt_ts_module = torch_tensorrt.compile(torch_script_module,
+    # If the inputs to the module are plain Tensors, specify them via the `inputs` argument:
     inputs = [example_tensor, # Provide example tensor for input shape or...
         torch_tensorrt.Input( # Specify input object with shape and dtype
             min_shape=[1, 3, 224, 224],
@@ -81,6 +82,12 @@ trt_ts_module = torch_tensorrt.compile(torch_script_module,
             # For static size shape=[1, 3, 224, 224]
             dtype=torch.half) # Datatype of input tensor. Allowed options torch.(float|half|int8|int32|bool)
     ],
+
+    # For inputs containing tuples or lists of tensors, use the `input_signature` argument:
+    # Below, we have an input consisting of a Tuple of two Tensors (Tuple[Tensor, Tensor])
+    # input_signature = ( (torch_tensorrt.Input(shape=[1, 3, 224, 224], dtype=torch.half),
+    #                      torch_tensorrt.Input(shape=[1, 3, 224, 224], dtype=torch.half)), ),
+
     enabled_precisions = {torch.half}, # Run with FP16
 )
 

core/compiler.cpp

@@ -352,8 +352,9 @@ torch::jit::Module CompileGraph(const torch::jit::Module& mod, CompileSpec cfg)
       // Determine if the block is convertible/has collection output, and based on the result,
       // whether full compilation can be expected
       auto isBlockConvertible = conversion::VerifyConverterSupportForBlock(g->block(), true);
+      auto inputIsCollection = conversion::InputIsCollection(g->block());
       auto outputIsCollection = conversion::OutputIsCollection(g->block());
-      auto requires_collection_handling = (isBlockConvertible && outputIsCollection);
+      auto requires_collection_handling = (isBlockConvertible && (inputIsCollection || outputIsCollection));
 
       // Determine whether user specifications necessitate partitioning
       auto isFallbackRequested = userRequestedFallback(cfg);

core/conversion/conversion.cpp

@@ -556,10 +556,20 @@ std::set<std::string> ConvertableOpsInBlock(const torch::jit::Block* b) {
   return convertable_ops;
 }
 
+bool InputIsCollection(const torch::jit::Block* b) {
+  for (auto in : b->inputs()) {
+    if (in->type()->kind() == torch::jit::TypeKind::TupleType || in->type()->kind() == torch::jit::TypeKind::ListType) {
+      return true;
+    }
+  }
+  return false;
+}
+
 bool OutputIsCollection(const torch::jit::Block* b) {
   for (auto out : b->outputs()) {
     if (out->type()->kind() == torch::jit::TypeKind::TupleType ||
-        out->type()->kind() == torch::jit::TypeKind::ListType) {
+        out->type()->kind() == torch::jit::TypeKind::ListType ||
+        out->type()->kind() == torch::jit::TypeKind::DictType) {
       return true;
     }
   }

core/conversion/conversion.h

@@ -26,6 +26,8 @@ std::string ConvertBlockToEngine(
 
 bool OpSupported(const torch::jit::Node* n);
 
+bool InputIsCollection(const torch::jit::Block* b);
+
 bool OutputIsCollection(const torch::jit::Block* b);
 
 bool VerifyConverterSupportForBlock(const torch::jit::Block* b, bool suppress_errors = false);

cpp/src/compile_spec.cpp

@@ -74,27 +74,6 @@ torchtrt::core::CompileSpec init_compile_spec(CompileSpec& external) {
     LOG_WARNING("Input signature parsing is an experimental feature, behavior and APIs may change");
     to_internal_input_signature(external.graph_inputs.input_signature, converted_input_signature);
     torchtrt::core::CompileSpec internal(converted_input_signature);
-
-    TORCHTRT_CHECK(
-        !external.require_full_compilation,
-        "Grouped inputs currently requires partial compilation to be enabled, \
-      this restriction will be relaxed in a future release");
-
-    LOG_DEBUG("Grouped inputs currently requires additional settings to enable the feature");
-    LOG_DEBUG(
-        "Adding the following ops to torch_executed_ops:" << std::endl
-                                                          << "  - aten::__getitem__" << std::endl
-                                                          << "  - prim::ListConstruct" << std::endl
-                                                          << "  - prim::ListUnpack" << std::endl
-                                                          << "  - prim::TupleIndex" << std::endl
-                                                          << "  - prim::TupleConstruct" << std::endl
-                                                          << "  - prim::TupleUnpack");
-    external.torch_executed_ops.push_back("aten::__getitem__");
-    external.torch_executed_ops.push_back("prim::ListConstruct");
-    external.torch_executed_ops.push_back("prim::ListUnpack");
-    external.torch_executed_ops.push_back("prim::TupleIndex");
-    external.torch_executed_ops.push_back("prim::TupleConstruct");
-    external.torch_executed_ops.push_back("prim::TupleUnpack");
     return internal;
   }
 }

docsrc/getting_started/getting_started_with_python_api.rst

@@ -14,8 +14,7 @@ If given a ``torch.nn.Module`` and the ``ir`` flag is set to either ``default``
 
 To compile your input ``torch.nn.Module`` with Torch-TensorRT, all you need to do is provide the module and inputs
 to Torch-TensorRT and you will be returned an optimized TorchScript module to run or add into another PyTorch module. Inputs
-is a list of ``torch_tensorrt.Input`` classes which define input's shape, datatype and memory format. You can also specify settings such as
-operating precision for the engine or target device. After compilation you can save the module just like any other module
+is a list of ``torch_tensorrt.Input`` classes which define input Tensors' shape, datatype and memory format. Alternatively, if your input is a more complex data type, such as a tuple or list of Tensors, you can use the ``input_signature`` argument to specify a collection-based input, such as ``(List[Tensor], Tuple[Tensor, Tensor])``. See the second sample below for an example. You can also specify settings such as operating precision for the engine or target device. After compilation you can save the module just like any other module
 to load in a deployment application. In order to load a TensorRT/TorchScript module, make sure you first import ``torch_tensorrt``.
 
 .. code-block:: python
@@ -44,6 +43,32 @@ to load in a deployment application. In order to load a TensorRT/TorchScript mod
     result = trt_ts_module(input_data)
     torch.jit.save(trt_ts_module, "trt_ts_module.ts")
 
+.. code-block:: python
+
+    # Sample using collection-based inputs via the input_signature argument
+    import torch_tensorrt
+
+    ...
+
+    model = MyModel().eval()
+
+    # input_signature expects a tuple of individual input arguments to the module
+    # The module below, for example, would have a docstring of the form:
+    # def forward(self, input0: List[torch.Tensor], input1: Tuple[torch.Tensor, torch.Tensor])
+    input_signature = (
+        [torch_tensorrt.Input(shape=[64, 64], dtype=torch.half), torch_tensorrt.Input(shape=[64, 64], dtype=torch.half)],
+        (torch_tensorrt.Input(shape=[64, 64], dtype=torch.half), torch_tensorrt.Input(shape=[64, 64], dtype=torch.half)),
+    )
+    enabled_precisions = {torch.float, torch.half}
+
+    trt_ts_module = torch_tensorrt.compile(
+        model, input_signature=input_signature, enabled_precisions=enabled_precisions
+    )
+
+    input_data = input_data.to("cuda").half()
+    result = trt_ts_module(input_data)
+    torch.jit.save(trt_ts_module, "trt_ts_module.ts")
+
 .. code-block:: python
 
     # Deployment application
@@ -55,4 +80,3 @@ to load in a deployment application. In order to load a TensorRT/TorchScript mod
     result = trt_ts_module(input_data)
 
 Torch-TensorRT Python API also provides ``torch_tensorrt.ts.compile`` which accepts a TorchScript module as input and ``torch_tensorrt.fx.compile`` which accepts a FX GraphModule as input.
-

py/torch_tensorrt/ts/_compile_spec.py

@@ -268,42 +268,7 @@ def _parse_compile_spec(compile_spec_: Dict[str, Any]) -> _ts_C.CompileSpec:
             "Input signature parsing is an experimental feature, behavior and APIs may change",
         )
         signature = _parse_input_signature(compile_spec["input_signature"])
-        info.input_signature = _C.InputSignature(signature)  # py_object
-
-        if not compile_spec["torch_fallback"]["enabled"]:
-            raise ValueError(
-                "Grouped inputs currently requires partial compilation to be enabled, this restriction will be relaxed in a future release"
-            )
-
-        log(
-            Level.Debug,
-            "Grouped inputs currently requires additional settings to enable the feature",
-        )
-        log(
-            Level.Debug,
-            """Adding the following ops to torch_executed_ops:
-    - aten::__getitem__
-    - prim::ListConstruct
-    - prim::ListUnpack
-    - prim::TupleIndex
-    - prim::TupleConstruct
-    - prim::TupleUnpack
-""",
-        )
-        compile_spec["torch_fallback"]["forced_fallback_ops"].append(
-            "aten::__getitem__"
-        )
-        compile_spec["torch_fallback"]["forced_fallback_ops"].append(
-            "prim::ListConstruct"
-        )
-        compile_spec["torch_fallback"]["forced_fallback_ops"].append("prim::ListUnpack")
-        compile_spec["torch_fallback"]["forced_fallback_ops"].append("prim::TupleIndex")
-        compile_spec["torch_fallback"]["forced_fallback_ops"].append(
-            "prim::TupleConstruct"
-        )
-        compile_spec["torch_fallback"]["forced_fallback_ops"].append(
-            "prim::TupleUnpack"
-        )
+        info.input_signature = _C.InputSignature(signature)
 
     else:
         raise KeyError(

tests/cpp/test_collections.cpp

@@ -404,3 +404,65 @@ TEST(CppAPITests, TestCollectionComplexModel) {
   ASSERT_TRUE(torch_tensorrt::tests::util::cosineSimEqual(
       out.toTuple()->elements()[1].toTensor(), trt_out.toTuple()->elements()[1].toTensor()));
 }
+
+TEST(CppAPITests, TestCollectionFullCompilationComplexModel) {
+  std::string path = "tests/modules/list_input_tuple_output_scripted.jit.pt";
+  torch::Tensor in0 = torch::randn({1, 3, 512, 512}, torch::kCUDA).to(torch::kHalf);
+  std::vector<at::Tensor> inputs;
+  inputs.push_back(in0);
+
+  torch::jit::Module mod;
+  try {
+    // Deserialize the ScriptModule from a file using torch::jit::load().
+    mod = torch::jit::load(path);
+  } catch (const c10::Error& e) {
+    std::cerr << "error loading the model\n";
+  }
+  mod.eval();
+  mod.to(torch::kCUDA);
+
+  std::vector<torch::jit::IValue> inputs_;
+
+  for (auto in : inputs) {
+    inputs_.push_back(torch::jit::IValue(in.clone()));
+  }
+
+  std::vector<torch::jit::IValue> complex_inputs;
+  auto input_list = c10::impl::GenericList(c10::TensorType::get());
+  input_list.push_back(inputs_[0]);
+  input_list.push_back(inputs_[0]);
+
+  torch::jit::IValue input_list_ivalue = torch::jit::IValue(input_list);
+
+  complex_inputs.push_back(input_list_ivalue);
+
+  auto out = mod.forward(complex_inputs);
+
+  auto input_shape = torch_tensorrt::Input(in0.sizes(), torch_tensorrt::DataType::kHalf);
+
+  auto input_shape_ivalue = torch::jit::IValue(std::move(c10::make_intrusive<torch_tensorrt::Input>(input_shape)));
+
+  c10::TypePtr elementType = input_shape_ivalue.type();
+  auto list = c10::impl::GenericList(elementType);
+  list.push_back(input_shape_ivalue);
+  list.push_back(input_shape_ivalue);
+
+  torch::jit::IValue complex_input_shape(list);
+  std::tuple<torch::jit::IValue> input_tuple2(complex_input_shape);
+  torch::jit::IValue complex_input_shape2(input_tuple2);
+
+  auto compile_settings = torch_tensorrt::ts::CompileSpec(complex_input_shape2);
+  compile_settings.min_block_size = 1;
+  compile_settings.require_full_compilation = true;
+
+  // // FP16 execution
+  compile_settings.enabled_precisions = {torch::kHalf};
+  // // Compile module
+  auto trt_mod = torch_tensorrt::torchscript::compile(mod, compile_settings);
+  auto trt_out = trt_mod.forward(complex_inputs);
+
+  ASSERT_TRUE(torch_tensorrt::tests::util::cosineSimEqual(
+      out.toTuple()->elements()[0].toTensor(), trt_out.toTuple()->elements()[0].toTensor()));
+  ASSERT_TRUE(torch_tensorrt::tests::util::cosineSimEqual(
+      out.toTuple()->elements()[1].toTensor(), trt_out.toTuple()->elements()[1].toTensor()));
+}

tests/py/api/test_collections.py

@@ -194,6 +194,34 @@ def test_compile(self):
                 msg=f"tuple_input_output_scripted TRT outputs don't match with the original model. Cosine sim score: {cos_sim} Threshold: {COSINE_THRESHOLD}",
             )
 
+    def test_compile_full_compilation(self):
+        self.input = torch.randn((1, 3, 224, 224)).to("cuda")
+        self.model = (
+            torch.jit.load(MODULE_DIR + "/tuple_input_output_scripted.jit.pt")
+            .eval()
+            .to("cuda")
+        )
+
+        compile_spec = {
+            "input_signature": (
+                (torchtrt.Input(self.input.shape), torchtrt.Input(self.input.shape)),
+            ),
+            "device": torchtrt.Device("gpu:0"),
+            "enabled_precisions": {torch.float},
+            "min_block_size": 1,
+            "require_full_compilation": True,
+        }
+
+        trt_mod = torchtrt.ts.compile(self.model, **compile_spec)
+        trt_out = trt_mod((self.input, self.input))
+        pyt_out = self.model((self.input, self.input))
+        for (t, p) in zip(trt_out, pyt_out):
+            cos_sim = cosine_similarity(t, p)
+            self.assertTrue(
+                cos_sim > COSINE_THRESHOLD,
+                msg=f"tuple_input_output_scripted TRT outputs don't match with the original model. Cosine sim score: {cos_sim} Threshold: {COSINE_THRESHOLD}",
+            )
+
 
 class TestListInputOutput(unittest.TestCase):
     def test_compile(self):
@@ -225,6 +253,36 @@ def test_compile(self):
                 msg=f"list_input_output_scripted TRT outputs don't match with the original model. Cosine sim score: {cos_sim} Threshold: {COSINE_THRESHOLD}",
             )
 
+    def test_compile_full_compilation(self):
+
+        self.input = torch.randn((1, 3, 224, 224)).to("cuda")
+        self.model = (
+            torch.jit.load(MODULE_DIR + "/list_input_output_scripted.jit.pt")
+            .eval()
+            .to("cuda")
+        )
+
+        compile_spec = {
+            "input_signature": (
+                [torchtrt.Input(self.input.shape), torchtrt.Input(self.input.shape)],
+            ),
+            "device": torchtrt.Device("gpu:0"),
+            "enabled_precisions": {torch.float},
+            "min_block_size": 1,
+            "require_full_compilation": True,
+        }
+
+        trt_mod = torchtrt.ts.compile(self.model, **compile_spec)
+        trt_out = trt_mod((self.input, self.input))
+        pyt_out = self.model((self.input, self.input))
+
+        for (t, p) in zip(trt_out, pyt_out):
+            cos_sim = cosine_similarity(t, p)
+            self.assertTrue(
+                cos_sim > COSINE_THRESHOLD,
+                msg=f"list_input_output_scripted TRT outputs don't match with the original model. Cosine sim score: {cos_sim} Threshold: {COSINE_THRESHOLD}",
+            )
+
 
 class TestListInputTupleOutput(unittest.TestCase):
     def test_compile(self):
@@ -255,6 +313,35 @@ def test_compile(self):
                 msg=f"list_input_tuple_output_scripted TRT outputs don't match with the original model. Cosine sim score: {cos_sim} Threshold: {COSINE_THRESHOLD}",
             )
 
+    def test_compile_full_compilation(self):
+
+        self.input = torch.randn((1, 3, 224, 224)).to("cuda")
+        self.model = (
+            torch.jit.load(MODULE_DIR + "/list_input_tuple_output_scripted.jit.pt")
+            .eval()
+            .to("cuda")
+        )
+
+        compile_spec = {
+            "input_signature": (
+                [torchtrt.Input(self.input.shape), torchtrt.Input(self.input.shape)],
+            ),
+            "device": torchtrt.Device("gpu:0"),
+            "enabled_precisions": {torch.float},
+            "min_block_size": 1,
+            "require_full_compilation": True,
+        }
+
+        trt_mod = torchtrt.ts.compile(self.model, **compile_spec)
+        trt_out = trt_mod((self.input, self.input))
+        pyt_out = self.model((self.input, self.input))
+        for (t, p) in zip(trt_out, pyt_out):
+            cos_sim = cosine_similarity(t, p)
+            self.assertTrue(
+                cos_sim > COSINE_THRESHOLD,
+                msg=f"list_input_tuple_output_scripted TRT outputs don't match with the original model. Cosine sim score: {cos_sim} Threshold: {COSINE_THRESHOLD}",
+            )
+
 
 if __name__ == "__main__":
     unittest.main()