chore: Address review comments and remove commented code

Signed-off-by: Dheeraj Peri <peri.dheeraj@gmail.com>

Author: peri044

core/compiler.cpp

@@ -372,15 +372,6 @@ std::string ConvertGraphToTRTEngine(const torch::jit::script::Module& mod, std::
   // Infer the type of an input from the weights of the calculation
   auto first_use_types = ir::get_block_first_calc_dtypes_opt(g->block());
 
-  // // GPU default WS size : 1 GB
-  // // Set WS = 256 Mb for Jetson nano/TX1 like platforms whose compute capability is 5.X.
-  // auto workspace_size = cfg.convert_info.engine_settings.workspace_size;
-  // auto device_spec = cfg.convert_info.engine_settings.device;
-  // auto cuda_device = runtime::CudaDevice(device_spec.gpu_id, device_spec.device_type);
-  // if (workspace_size == 0) {
-  //   cfg.convert_info.engine_settings.workspace_size = GetRecommendedWorkspaceSize(cuda_device);
-  // }
-
   MapInputsAndDetermineDTypes(cfg, g, static_params, first_use_types);
 
   auto engine = conversion::ConvertBlockToEngine(g->block(), cfg.convert_info, static_params);
@@ -391,14 +382,8 @@ std::string ConvertGraphToTRTEngine(const torch::jit::script::Module& mod, std::
 torch::jit::Module CompileGraph(const torch::jit::Module& mod, CompileSpec cfg) {
   torch::jit::Module new_mod(mod._ivalue()->name() + "_trt");
 
-  // // GPU default WS size : 1 GB
-  // // Set WS = 256 Mb for Jetson nano/TX1 like platforms whose compute capability is 5.X.
-  // auto workspace_size = cfg.convert_info.engine_settings.workspace_size;
   auto device_spec = cfg.convert_info.engine_settings.device;
   auto cuda_device = runtime::CudaDevice(device_spec.gpu_id, device_spec.device_type);
-  // if (workspace_size == 0) {
-  //   cfg.convert_info.engine_settings.workspace_size = GetRecommendedWorkspaceSize(cuda_device);
-  // }
 
   for (const torch::jit::Method& method : mod.get_methods()) {
     if (method.name().compare("forward") == 0) {

core/partitioning/partitioning.cpp

@@ -115,7 +115,7 @@ void find_all_fallback_nodes(
     // for every node that produces this fallback node's NonTensor input, they should fallback too
     for (auto input : cur_node->inputs()) {
       if (!isTensor(input) && input->node()->kind() != torch::jit::prim::Constant &&
-          global_fallback_nodes.insert({input->node(), 4}).second) {
+          global_fallback_nodes.insert({input->node(), FallbackNodeType::kNON_TENSOR}).second) {
         q.push(input->node());
       }
     }
@@ -124,7 +124,7 @@ void find_all_fallback_nodes(
       if (!isTensor(output)) {
         for (auto use : output->uses()) {
           auto node = use.user;
-          if (node->kind() != torch::jit::prim::Constant && global_fallback_nodes.insert({node, 4}).second) {
+          if (node->kind() != torch::jit::prim::Constant && global_fallback_nodes.insert({node, FallbackNodeType::kNON_TENSOR}).second) {
             q.push(node);
           }
         }
@@ -229,13 +229,13 @@ bool checkLoopEvaluatable(torch::jit::Node* n) {
 
 bool check_node_fallback(torch::jit::Node* n, const std::unordered_map<torch::jit::Node*, int>& fallback_nodes) {
   if (fallback_nodes.count(n)) {
-    if (fallback_nodes.at(n) == 0) {
+    if (fallback_nodes.at(n) == FallbackNodeType::kUNSUPPORTED) {
       LOG_GRAPH("Node not supported by conversion: " << util::node_info(n));
-    } else if (fallback_nodes.at(n) == 1) {
+    } else if (fallback_nodes.at(n) == FallbackNodeType::kOPERATOR_FALLBACK) {
       LOG_GRAPH("Node explicitly set to run in torch: " << util::node_info(n));
-    } else if (fallback_nodes.at(n) == 2) {
+    } else if (fallback_nodes.at(n) == FallbackNodeType::kMODULE_FALLBACK) {
       LOG_GRAPH("Node is within a module set to run in torch: " << util::node_info(n));
-    } else if (fallback_nodes.at(n) == 3) {
+    } else if (fallback_nodes.at(n) == FallbackNodeType::kMIN_BLOCK_FALLBACK) {
       LOG_GRAPH("Node fallback to Torch because of min_block_size" << util::node_info(n));
     } else {
       LOG_GRAPH(
@@ -273,18 +273,18 @@ void get_fallback_nodes(
 
     // If the op is not supported by the conversion phase it should run in PyTorch
     if (!conversion::OpSupported(n)) {
-      fallback_nodes.insert({n, 0});
+      fallback_nodes.insert({n, FallbackNodeType::kUNSUPPORTED});
     }
 
     // If the user specifies the op to run in Torch it should run in PyTorch
     if (forced_fallback_ops.find(n->kind().toQualString()) != forced_fallback_ops.end()) {
-      fallback_nodes.insert({n, 1});
+      fallback_nodes.insert({n, FallbackNodeType::kOPERATOR_FALLBACK});
     }
 
     // If the user specifies the module containing this op to run in torch it should run in PyTorch
     const auto to_compile_sym = c10::Symbol::attr("to_compile");
     if (n->hasAttribute(to_compile_sym) && n->i(to_compile_sym) == (int64_t) false) {
-      fallback_nodes.insert({n, 2});
+      fallback_nodes.insert({n, FallbackNodeType::kMODULE_FALLBACK});
     }
   }
   return;
@@ -329,7 +329,7 @@ void find_min_block_size_fallback_nodes(
   // keep fallback until all segments meet the min_block_size requirement
   while (!min_block_fallback_nodes.empty()) {
     for (const auto i : min_block_fallback_nodes) {
-      initial_fallback_nodes.insert({i, 3});
+      initial_fallback_nodes.insert({i, FallbackNodeType::kMIN_BLOCK_FALLBACK});
     }
     global_fallback_nodes.insert(initial_fallback_nodes.begin(), initial_fallback_nodes.end());
     // find the fallback nodes because of dependency with min_block_size caused fallback nodes

core/partitioning/partitioning.h

@@ -16,6 +16,20 @@ namespace partitioning {
 
 typedef std::vector<SegmentedBlock> PartitionedGraph;
 
+enum FallbackNodeType {
+  /// Node is not supported by TensorRT
+  kUNSUPPORTED,
+  /// Node is explicitly forced to fallback to Pytorch due to operator fallback
+  kOPERATOR_FALLBACK,
+  /// Node is explicitly forced to fallback to Pytorch due to module fallback
+  kMODULE_FALLBACK,
+  /// This node is in a TRT segment which does not satisfy min_block_size
+  /// and hence is forced to fallback.
+  kMIN_BLOCK_FALLBACK,
+  /// This node produces/consumes non-tensor inputs
+  kNON_TENSOR,
+};
+
 PartitionedGraph segment_graph(
     torch::jit::Block* block,
     const PartitionInfo& partition_info,