global_info.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
 * under the License.
 */
 
#ifndef TVM_RELAX_DISTRIBUTED_GLOBAL_INFO_H_
#define TVM_RELAX_DISTRIBUTED_GLOBAL_INFO_H_
 
#include <tvm/ir/expr.h>
#include <tvm/ir/module.h>
namespace tvm {
namespace relax {
namespace distributed {
/*
 * \brief Device mesh express a view of topology of devices, represented by an n-d matrix of
 * device ids
 */
class DeviceMeshNode : public GlobalInfoNode {
 public:
  ShapeTuple shape;
 
  Array<Integer> device_ids;
 
  Optional<Range> device_range;
 
  void VisitAttrs(tvm::AttrVisitor* v) {
    v->Visit("shape", &shape);
    v->Visit("device_ids", &device_ids);
    v->Visit("device_range", &device_range);
  }
  static constexpr const char* _type_key = "relax.distributed.DeviceMesh";
 
  bool SEqualReduce(const DeviceMeshNode* other, SEqualReducer equal) const {
    if (shape.size() != other->shape.size()) {
      return false;
    }
    for (int i = 0; i < static_cast<int>(shape.size()); i++) {
      if (!equal(shape[i], other->shape[i])) {
        return false;
      }
    }
    return equal(device_ids, other->device_ids);
  }
 
  void SHashReduce(SHashReducer hash_reduce) const {
    hash_reduce(device_ids);
    for (int i = 0; i < static_cast<int>(shape.size()); i++) {
      hash_reduce(shape[i]);
    }
  }
 
  TVM_DECLARE_FINAL_OBJECT_INFO(DeviceMeshNode, GlobalInfoNode);
};
 
class DeviceMesh : public GlobalInfo {
 public:
  TVM_DLL DeviceMesh(ShapeTuple shape, Array<Integer> device_ids);
  TVM_DLL DeviceMesh(ShapeTuple shape, Range device_range);
  TVM_DEFINE_OBJECT_REF_METHODS(DeviceMesh, GlobalInfo, DeviceMeshNode);
};
 
}  // namespace distributed
}  // namespace relax
}  // namespace tvm
 
#endif  // TVM_RELAX_DISTRIBUTED_GLOBAL_INFO_H_