tensor_cache_support.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
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 */
#ifndef TVM_RUNTIME_VM_TENSOR_CACHE_SUPPORT_H_
#define TVM_RUNTIME_VM_TENSOR_CACHE_SUPPORT_H_
 
#include <tvm/ffi/container/array.h>
#include <tvm/ffi/function.h>
#include <tvm/runtime/tensor.h>
 
#include <string>
#include <unordered_map>
#include <vector>
 
namespace tvm {
namespace runtime {
namespace vm {
 
struct TensorCacheMetadata {
  struct FileRecord {
    struct ParamRecord {
      TVM_RUNTIME_DLL ffi::Tensor Load(Device device, const std::string* raw_data,
                                       ffi::Optional<ffi::Tensor>* staging_buffer = nullptr) const;
 
      std::string name;
      ffi::Shape shape;
      DLDataType dtype;
      std::string format;
      int64_t nbytes;
      int64_t byte_offset;
    };
 
    TVM_RUNTIME_DLL ffi::Array<ffi::Tensor> Load(
        Device device,                   //
        const std::string& path_prefix,  //
        std::string* raw_data_buffer,    //
        ffi::Optional<ffi::Tensor>* staging_buffer = nullptr) const;
 
    std::string data_path;
    std::string format;
    int64_t nbytes;
    std::vector<ParamRecord> records;
  };
  std::vector<FileRecord> records;
  std::string path;
 
  TVM_RUNTIME_DLL static TensorCacheMetadata Load(const std::string& path);
  TVM_RUNTIME_DLL static TensorCacheMetadata LoadFromStr(const std::string& json_str,
                                                         const std::string& path);
};
 
}  // namespace vm
}  // namespace runtime
}  // namespace tvm
 
#endif  // TVM_RUNTIME_VM_TENSOR_CACHE_SUPPORT_H_