syntax = "proto3";

package tensorflow;
// option cc_enable_arenas = true;

// BusAdjacency identifies the ability of a device to participate in
// maximally efficient DMA operations within the local context of a
// process.
//
// This is currently ignored.
enum BusAdjacency {
  BUS_0 = 0;
  BUS_1 = 1;
  BUS_ANY = 2;
  BUS_NUM_ADJACENCIES = 3;
};

message DeviceAttributes {
  string name = 1;

  // String representation of device_type.
  string device_type = 2;

  // Memory capacity of device in bytes.
  int64 memory_limit = 4;

  BusAdjacency bus_adjacency = 5;

  // A device is assigned a global unique number each time it is
  // initialized. "incarnation" should never be 0.
  fixed64 incarnation = 6;

  // String representation of the physical device that this device maps to.
  string physical_device_desc = 7;
}