message: Ask for the aggressive exchange scheduling algorithm
diff: @@ -228,6 +228,9 @@ StatusOr<std::unique_ptr<Executable>> PoplarCompiler::Compile(
  bool use_ipu_model = (getenv("TF_POPLAR_COMPILE_IPU_MODEL") != NULL);
  poplar::DeviceInfo dev_info;
  + dev_info.IPUExchangeType =
  + poplar::DeviceInfo::ExchangeType::AGGRESSIVE_MULTICAST;
  +
  poplar::DeviceOptions dev_opts;
  dev_opts.convertFloat16 = true;
  