[JIT] Add Predictor for JITLayer (#47379)

* add predictor_engine

* add predictor_engine

* fix zero shape

* fix lodTensor

* fix unittest

* fix code style

* update CmakeList

paddle/fluid/inference/analysis/argument.h

@@ -150,6 +150,9 @@ struct Argument {
   DECL_ARGUMENT_FIELD(optim_cache_dir, OptimCacheDir, std::string);
   DECL_ARGUMENT_FIELD(enable_analysis_optim, EnableAnalysisOptim, bool);
 
+  // For JITLayer
+  DECL_ARGUMENT_FIELD(skip_load_params, SkipLoadParams, bool);
+
   // The overall graph to work on.
   DECL_ARGUMENT_UNIQUE_FIELD(main_graph, MainGraph, framework::ir::Graph);
   // The overall Scope to work on.

paddle/fluid/inference/analysis/passes/ir_graph_build_pass.cc

@@ -55,7 +55,8 @@ void IrGraphBuildPass::RunImpl(Argument *argument) {
         argument->model_params_path(),
         argument->scope_ptr(),
         place,
-        argument->model_from_memory_valid() && argument->model_from_memory());
+        argument->model_from_memory_valid() && argument->model_from_memory(),
+        argument->skip_load_params());
     argument->SetMainProgram(program.release());
   } else {
     PADDLE_THROW(platform::errors::PreconditionNotMet(
@@ -114,10 +115,11 @@ std::unique_ptr<framework::ProgramDesc> IrGraphBuildPass::LoadModel(
     const std::string &params_path,
     framework::Scope *scope,
     const platform::Place &place,
-    bool model_from_memory) {
+    bool model_from_memory,
+    bool skip_load_params) {
   framework::Executor exe(place);
   if (!model_from_memory) {
-    return Load(&exe, scope, program_path, params_path);
+    return Load(&exe, scope, program_path, params_path, !skip_load_params);
   } else {
     return LoadFromMemory(&exe, scope, program_path, params_path);
   }

paddle/fluid/inference/analysis/passes/ir_graph_build_pass.h

@@ -43,7 +43,8 @@ class IrGraphBuildPass : public AnalysisPass {
       const std::string &params_path,
       framework::Scope *scope,
       const platform::Place &place,
-      bool model_from_memory);
+      bool model_from_memory,
+      bool skip_load_params);
 
   std::string model_binary_str_;
 };

paddle/fluid/inference/api/analysis_config.cc

@@ -484,6 +484,10 @@ AnalysisConfig::AnalysisConfig(const AnalysisConfig &other) {
   CP_MEMBER(custom_device_type_);
   CP_MEMBER(custom_device_id_);
 
+  // JITLayer relate
+  CP_MEMBER(apply_optim_);
+  CP_MEMBER(skip_load_params_);
+
   if (use_gpu_) {
     PADDLE_ENFORCE_EQ(use_xpu_,
                       false,

paddle/fluid/inference/api/analysis_predictor.cc

@@ -168,20 +168,27 @@ bool PaddleTensorToLoDTensor(const PaddleTensor &pt,
     LOG(ERROR) << "unsupported feed type " << pt.dtype;
     return false;
   }
-
-  PADDLE_ENFORCE_NOT_NULL(
-      input_ptr,
-      paddle::platform::errors::Fatal(
-          "Cannot convert to LoDTensor because LoDTensor creation failed."));
-  PADDLE_ENFORCE_NOT_NULL(
-      pt.data.data(),
-      paddle::platform::errors::InvalidArgument(
-          "The data contained in the input PaddleTensor is illegal."));
+  // NOTE(Aurelius84): Some kernels support zero shape input
+  // without memory holder, we should skip enforce logic.
+  bool has_zero_dim = (phi::product(ddim) == 0);
+  if (has_zero_dim) {
+    VLOG(3) << "Found zero dim from input with ddim: " << ddim;
+    PADDLE_ENFORCE_NOT_NULL(
+        input_ptr,
+        paddle::platform::errors::Fatal(
+            "Cannot convert to LoDTensor because LoDTensor creation failed."));
+    PADDLE_ENFORCE_NOT_NULL(
+        pt.data.data(),
+        paddle::platform::errors::InvalidArgument(
+            "The data contained in the input PaddleTensor is illegal."));
+  }
 
   if (platform::is_cpu_place(place)) {
     // TODO(panyx0718): Init LoDTensor from existing memcpy to save a copy.
-    std::memcpy(
-        static_cast<void *>(input_ptr), pt.data.data(), pt.data.length());
+    if (input_ptr != nullptr) {
+      std::memcpy(
+          static_cast<void *>(input_ptr), pt.data.data(), pt.data.length());
+    }
   } else if (platform::is_ipu_place(place)) {
 #ifdef PADDLE_WITH_IPU
     std::memcpy(
@@ -529,6 +536,11 @@ bool AnalysisPredictor::PrepareProgram(
     // If the program is passed from external, no need to optimize it, this
     // logic is used in the clone scenario.
     inference_program_ = program;
+    if (config_.apply_optim_) {
+      VLOG(3)
+          << "apply_optim is enabled, will call OptimizeInferenceProgram().";
+      OptimizeInferenceProgram();
+    }
   }
 
   executor_->CreateVariables(*inference_program_, 0, false, sub_scope_);
@@ -1065,11 +1077,12 @@ void AnalysisPredictor::PrepareArgument() {
                       false,
                       platform::errors::PreconditionNotMet(
                           "Either model_dir or prog_file should be set."));
-    std::string dir = inference::analysis::GetDirRoot(config_.prog_file());
 
     argument_.SetModelProgramPath(config_.prog_file());
     argument_.SetModelParamsPath(config_.params_file());
   }
+  // For JITLayer
+  argument_.SetSkipLoadParams(config_.skip_load_params_);
 
   argument_.SetTensorRtPrecisionMode(config_.tensorrt_precision_mode_);
   argument_.SetTensorRtUseOSS(config_.trt_use_varseqlen_);

paddle/fluid/inference/api/paddle_analysis_config.h

@@ -965,6 +965,10 @@ struct PD_INFER_DECL AnalysisConfig {
   void Exp_SetBlackListOpsForMixedModel(
       const std::unordered_set<std::string>& black_list);
 
+  void SetApplyOptim(bool value) { apply_optim_ = value; }
+
+  void SetSkipLoadParams(bool value) { skip_load_params_ = value; }
+
  protected:
   // Update the config.
   void Update();
@@ -1167,6 +1171,13 @@ struct PD_INFER_DECL AnalysisConfig {
 
   // fleet exe related
   DistConfig dist_config_{};
+
+  // jit engine related
+  // NOTE(Aureliue84): In case of Predictor in JITLayer, program is from outer
+  // which means Predictor should apply optimization by calling
+  // PrepareProgram(). So we add this flag to control the process.
+  bool apply_optim_{false};
+  bool skip_load_params_{false};
 };
 
 }  // namespace paddle

paddle/fluid/inference/io.cc

@@ -160,11 +160,11 @@ std::unique_ptr<framework::ProgramDesc> Load(framework::Executor* executor,
   return main_program;
 }
 
-std::unique_ptr<framework::ProgramDesc> Load(
-    framework::Executor* executor,
-    framework::Scope* scope,
-    const std::string& prog_filename,
-    const std::string& param_filename) {
+std::unique_ptr<framework::ProgramDesc> Load(framework::Executor* executor,
+                                             framework::Scope* scope,
+                                             const std::string& prog_filename,
+                                             const std::string& param_filename,
+                                             bool load_params) {
   std::string program_desc_str;
   ReadBinaryFile(prog_filename, &program_desc_str);
 
@@ -175,13 +175,14 @@ std::unique_ptr<framework::ProgramDesc> Load(
       true,
       platform::errors::Unavailable("Model version %ld is not supported.",
                                     main_program->Version()));
-
-  LoadPersistables(executor,
-                   scope,
-                   *main_program,
-                   "",
-                   param_filename,
-                   false /* model_from_memory */);
+  if (load_params) {
+    LoadPersistables(executor,
+                     scope,
+                     *main_program,
+                     "",
+                     param_filename,
+                     false /* model_from_memory */);
+  }
   return main_program;
 }
 

paddle/fluid/inference/io.h

@@ -42,7 +42,8 @@ std::unique_ptr<framework::ProgramDesc> Load(framework::Executor* executor,
 std::unique_ptr<framework::ProgramDesc> Load(framework::Executor* executor,
                                              framework::Scope* scope,
                                              const std::string& prog_filename,
-                                             const std::string& param_filename);
+                                             const std::string& param_filename,
+                                             bool load_params = true);
 
 std::unique_ptr<framework::ProgramDesc> LoadFromMemory(
     framework::Executor* executor,

paddle/fluid/jit/CMakeLists.txt

@@ -35,7 +35,7 @@ cc_library(
   jit_function
   SRCS function.cc
   DEPS jit_function_utils jit_executor_engine jit_pe_engine
-       jit_interpreter_engine)
+       jit_interpreter_engine jit_predictor_engine)
 
 cc_library(
   jit_layer
@@ -48,6 +48,7 @@ cc_library(
        jit_executor_engine
        jit_pe_engine
        jit_interpreter_engine
+       jit_predictor_engine
        jit_function)
 
 if(WITH_TESTING AND NOT WIN32)

paddle/fluid/jit/engine/CMakeLists.txt

@@ -12,3 +12,8 @@ cc_library(
   jit_interpreter_engine
   SRCS interpreter_engine.cc
   DEPS standalone_executor)
+
+cc_library(
+  jit_predictor_engine
+  SRCS predictor_engine.cc
+  DEPS paddle_inference_api analysis_predictor)

paddle/fluid/jit/engine/predictor_engine.cc

+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "paddle/fluid/jit/engine/predictor_engine.h"
+
+#include "paddle/fluid/inference/api/analysis_predictor.h"
+#include "paddle/fluid/inference/api/paddle_api.h"
+#include "paddle/fluid/jit/function_utils.h"
+#include "paddle/fluid/platform/device_context.h"
+
+namespace paddle {
+namespace jit {
+
+static PaddleTensor DenseTensorToPaddleTensor(DenseTensor *t);
+static bool PaddleTensorToDenseTensor(const PaddleTensor &pt,
+                                      DenseTensor *t,
+                                      const platform::Place &place);
+
+PredictorEngine::PredictorEngine(const std::shared_ptr<FunctionInfo> &info,
+                                 const VariableMap &params_dict,
+                                 const phi::Place &place)
+    : info_(info), scope_(new framework::Scope()), place_(place) {
+  utils::ShareParamsIntoScope(info_->ParamNames(), params_dict, scope_.get());
+  VLOG(6) << framework::GenScopeTreeDebugInfo(scope_.get());
+
+  AnalysisConfig config;
+  config.SetProgFile(info->ProgramFilePath());
+  if (platform::is_gpu_place(place_)) {
+    config.EnableUseGpu(100, place_.GetDeviceId());
+  } else if (platform::is_cpu_place(place_)) {
+    config.DisableGpu();
+  }
+  config.SetSkipLoadParams(true);
+  config.SetApplyOptim(true);
+  config.SwitchIrOptim(true);
+
+  predictor_.reset(new AnalysisPredictor(config));
+
+  predictor_->Init(
+      scope_, std::make_shared<framework::ProgramDesc>(info_->ProgramDesc()));
+}
+
+std::vector<Tensor> PredictorEngine::operator()(
+    const std::vector<Tensor> &inputs) {
+  auto dense_tensors = utils::ToDenseTensors(inputs);
+  return utils::ToTensors(this->operator()(dense_tensors));
+}
+
+std::vector<DenseTensor> PredictorEngine::operator()(
+    const std::vector<DenseTensor> &inputs) {
+  for (auto t : inputs) {
+    VLOG(1) << "inputs is init: " << t.initialized();
+  }
+
+  std::vector<PaddleTensor> pt_inputs;
+  std::vector<PaddleTensor> pt_outputs;
+  for (auto &t : inputs) {
+    auto non_const_t = const_cast<DenseTensor *>(&t);
+    pt_inputs.emplace_back(DenseTensorToPaddleTensor(non_const_t));
+  }
+
+  predictor_->Run(pt_inputs, &pt_outputs);
+
+  std::vector<DenseTensor> outputs;
+  for (auto &pt : pt_outputs) {
+    DenseTensor t;
+    PaddleTensorToDenseTensor(pt, &t, place_);
+    outputs.emplace_back(t);
+  }
+
+  return outputs;
+}
+
+static PaddleTensor DenseTensorToPaddleTensor(DenseTensor *t) {
+  PaddleTensor pt;
+
+  if (framework::TransToProtoVarType(t->dtype()) ==
+      framework::proto::VarType::INT32) {
+    pt.data.Reset(t->data(), t->numel() * sizeof(int32_t));
+    pt.dtype = PaddleDType::INT32;
+  } else if (framework::TransToProtoVarType(t->dtype()) ==
+             framework::proto::VarType::INT64) {
+    pt.data.Reset(t->data(), t->numel() * sizeof(int64_t));
+    pt.dtype = PaddleDType::INT64;
+  } else if (framework::TransToProtoVarType(t->dtype()) ==
+             framework::proto::VarType::FP32) {
+    pt.data.Reset(t->data(), t->numel() * sizeof(float));
+    pt.dtype = PaddleDType::FLOAT32;
+  } else {
+    PADDLE_THROW(platform::errors::Unimplemented(
+        "Unsupported tensor date type. Now only supports INT64, FP32, INT32."));
+  }
+  pt.shape = phi::vectorize<int>(t->dims());
+  return pt;
+}
+
+static bool PaddleTensorToDenseTensor(const PaddleTensor &pt,
+                                      DenseTensor *t,
+                                      const platform::Place &place) {
+  framework::DDim ddim = phi::make_ddim(pt.shape);
+  void *input_ptr;
+  if (pt.dtype == PaddleDType::INT64) {
+    input_ptr = t->mutable_data<int64_t>(ddim, place);
+  } else if (pt.dtype == PaddleDType::FLOAT32) {
+    input_ptr = t->mutable_data<float>(ddim, place);
+  } else if (pt.dtype == PaddleDType::INT32) {
+    input_ptr = t->mutable_data<int32_t>(ddim, place);
+  } else if (pt.dtype == PaddleDType::FLOAT16) {
+    input_ptr = t->mutable_data<float16>(ddim, place);
+  } else {
+    LOG(ERROR) << "unsupported feed type " << pt.dtype;
+    return false;
+  }
+
+  PADDLE_ENFORCE_NOT_NULL(
+      input_ptr,
+      paddle::platform::errors::Fatal(
+          "Cannot convert to LoDTensor because LoDTensor creation failed."));
+  PADDLE_ENFORCE_NOT_NULL(
+      pt.data.data(),
+      paddle::platform::errors::InvalidArgument(
+          "The data contained in the input PaddleTensor is illegal."));
+
+  if (platform::is_cpu_place(place)) {
+    // TODO(panyx0718): Init LoDTensor from existing memcpy to save a copy.
+    std::memcpy(
+        static_cast<void *>(input_ptr), pt.data.data(), pt.data.length());
+  } else if (platform::is_ipu_place(place)) {
+#ifdef PADDLE_WITH_IPU
+    std::memcpy(
+        static_cast<void *>(input_ptr), pt.data.data(), pt.data.length());
+#else
+    PADDLE_THROW(paddle::platform::errors::Fatal(
+        "Not compile with WITH_IPU, should not reach here."));
+#endif
+  } else if (platform::is_gpu_place(place)) {
+    PADDLE_ENFORCE_EQ(platform::is_xpu_place(place),
+                      false,
+                      platform::errors::InvalidArgument(
+                          "Only one choice can be made between CPU and XPU."));
+#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto *dev_ctx = static_cast<const phi::GPUContext *>(pool.Get(place));
+    auto dst_gpu_place = place;
+    memory::Copy(dst_gpu_place,
+                 static_cast<void *>(input_ptr),
+                 platform::CPUPlace(),
+                 pt.data.data(),
+                 pt.data.length(),
+                 dev_ctx->stream());
+#else
+    PADDLE_THROW(paddle::platform::errors::Fatal(
+        "Not compile with CUDA, should not reach here."));
+#endif
+  } else if (platform::is_xpu_place(place)) {
+#ifdef PADDLE_WITH_XPU
+    auto dst_xpu_place = place;
+    memory::Copy(dst_xpu_place,
+                 static_cast<void *>(input_ptr),
+                 platform::CPUPlace(),
+                 pt.data.data(),
+                 pt.data.length());
+#else
+    PADDLE_THROW(paddle::platform::errors::Fatal(
+        "Not compile with XPU, should not reach here."));
+#endif
+  } else {
+    PADDLE_THROW(paddle::platform::errors::InvalidArgument(
+        "The analysis predictor supports CPU, GPU and XPU now."));
+  }
+  return true;
+}
+
+}  // namespace jit
+}  // namespace paddle

paddle/fluid/jit/engine/predictor_engine.h

+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "paddle/fluid/jit/engine/base_engine.h"
+#include "paddle/fluid/jit/function_schema.h"
+#include "paddle/fluid/jit/function_utils.h"
+
+namespace paddle {
+class AnalysisPredictor;
+
+namespace framework {
+class Scope;
+}
+
+namespace jit {
+
+class PredictorEngine : public BaseEngine {
+ public:
+  PredictorEngine(const std::shared_ptr<FunctionInfo> &info,
+                  const VariableMap &params_dict,
+                  const phi::Place &place);
+
+  ~PredictorEngine() noexcept {}
+
+  std::vector<Tensor> operator()(const std::vector<Tensor> &inputs);
+
+  std::vector<DenseTensor> operator()(const std::vector<DenseTensor> &inputs);
+
+ private:
+  std::shared_ptr<FunctionInfo> info_;
+  std::shared_ptr<framework::Scope> scope_;
+  phi::Place place_;
+  std::shared_ptr<AnalysisPredictor> predictor_;
+};
+
+}  // namespace jit
+}  // namespace paddle

paddle/fluid/jit/function_schema.cc

@@ -82,6 +82,14 @@ const std::vector<std::string> FunctionInfo::OutputArgNames() const {
   return schema_.OutputArgNames();
 }
 
+const std::string& FunctionInfo::ProgramFilePath() const {
+  return prog_file_path_;
+}
+
+void FunctionInfo::SetProgramFilePath(const std::string& path) {
+  prog_file_path_ = path;
+}
+
 void FunctionInfo::RemoveDescFeedFetch() {
   utils::RemoveFeedFetch(program_desc_.get());
 }

paddle/fluid/jit/function_schema.h

@@ -72,6 +72,10 @@ class FunctionInfo {
 
   const std::vector<std::string> OutputArgNames() const;
 
+  const std::string& ProgramFilePath() const;
+
+  void SetProgramFilePath(const std::string& path);
+
   void RemoveDescFeedFetch();
 
  private:
@@ -79,6 +83,7 @@ class FunctionInfo {
   std::vector<std::string> param_names_;
   std::shared_ptr<framework::ProgramDesc> program_desc_;
   FunctionSchema schema_;
+  std::string prog_file_path_;
 };
 
 }  // namespace jit

paddle/fluid/jit/serializer.cc

@@ -23,6 +23,7 @@
 #include "paddle/fluid/jit/engine/executor_engine.h"
 #include "paddle/fluid/jit/engine/interpreter_engine.h"
 #include "paddle/fluid/jit/engine/pe_engine.h"
+#include "paddle/fluid/jit/engine/predictor_engine.h"
 #include "paddle/fluid/jit/layer.h"
 #include "paddle/fluid/jit/property.h"
 #include "paddle/fluid/jit/serializer_utils.h"
@@ -54,6 +55,7 @@ Layer Deserializer::operator()(const std::string& path,
     param_names_set.insert(persist_var_names.begin(), persist_var_names.end());
     info_map[func_name] = std::make_shared<FunctionInfo>(
         func_name, persist_var_names, program_desc);
+    info_map[func_name]->SetProgramFilePath(it.second);
   }
 
   VariableMap params_dict;
@@ -70,22 +72,23 @@ Layer Deserializer::operator()(const std::string& path,
   for (auto it = info_map.begin(); it != info_map.end(); ++it) {
     const std::string& func_name = it->first;
     auto& info = it->second;
+    VLOG(3) << "Add function type: " << FLAGS_jit_engine_type
+            << " Function name: " << func_name;
     if (FLAGS_jit_engine_type == "Executor") {
-      VLOG(3) << "Add function type: ExecutorEngine. Function name: "
-              << func_name;
       layer.SetEngine(
           func_name,
           utils::MakeEngine<ExecutorEngine>(info, params_dict, place));
     } else if (FLAGS_jit_engine_type == "PE") {
-      VLOG(3) << "Add function type: PEEngine. Function name: " << func_name;
       layer.SetEngine(func_name,
                       utils::MakeEngine<PEEngine>(info, params_dict, place));
     } else if (FLAGS_jit_engine_type == "New") {
-      VLOG(3) << "Add function type: InterpreterEngine. Function name: "
-              << func_name;
       layer.SetEngine(
           func_name,
           utils::MakeEngine<InterpreterEngine>(info, params_dict, place));
+    } else if (FLAGS_jit_engine_type == "Predictor") {
+      layer.SetEngine(
+          info->FunctionName(),
+          utils::MakeEngine<PredictorEngine>(info, params_dict, place));
     } else {
       PD_THROW("Invalid JitLayer engine type.");
     }

paddle/fluid/operators/collective/CMakeLists.txt

@@ -17,6 +17,10 @@ foreach(src ${OPS})
                                                 ${COLLECTIVE_COMPILE_FLAGS})
 endforeach()
 
+if(WITH_GLOO)
+  set(COLLECTIVE_DEPS ${COLLECTIVE_DEPS} gloo_wrapper)
+endif()
+
 register_operators(
   EXCLUDES
   c_gen_bkcl_id_op
@@ -35,10 +39,6 @@ if(WITH_NCCL OR WITH_RCCL)
   op_library(gen_nccl_id_op DEPS ${COLLECTIVE_DEPS})
 endif()
 
-if(WITH_GLOO)
-  set(COLLECTIVE_DEPS ${COLLECTIVE_DEPS} gloo_wrapper)
-endif()
-
 if(WITH_XPU_BKCL)
   set(COLLECTIVE_DEPS ${COLLECTIVE_DEPS} collective_helper)
   op_library(c_gen_bkcl_id_op DEPS ${COLLECTIVE_DEPS})

paddle/fluid/operators/sequence_ops/CMakeLists.txt

@@ -4,3 +4,7 @@ if(WITH_UNITY_BUILD)
   include(unity_build_rule.cmake)
 endif()
 register_operators()
+
+if(WITH_UNITY_BUILD)
+  target_link_libraries(paddle_operators_sequence_ops_unity sequence_pooling)
+endif()

paddle/fluid/platform/flags.cc

@@ -1010,13 +1010,14 @@ PADDLE_DEFINE_EXPORTED_bool(
  * Name: FLAGS_jit_engine_type
  * Since Version: 2.3.0
  * Value Range: string, {Executor, PE},
- * default=PE
+ * default=Predictor
  * Example:
  * Note:
  * FLAGS_jit_engine_type == Executor, using ExecutorEngine by default
  * FLAGS_jit_engine_type == PE, using PEEngine by default
  * FLAGS_jit_engine_type == New, using InterpreterEngine by default
+ * FLAGS_jit_engine_type == Predictor, using inference Predictor by default
  */
 PADDLE_DEFINE_EXPORTED_string(jit_engine_type,
-                              "PE",
+                              "Predictor",
                               "Choose default funciton type in JitLayer.");