Hyper parameters specifics for long sequence generation.

def attention_lm_moe_base_long_seq():
  """Hyper parameters specifics for long sequence generation."""
  hparams = attention_lm_moe_base()

  hparams.max_length = 0  # max_length == batch_size
  hparams.eval_drop_long_sequences = True
  hparams.min_length_bucket = 256  # Avoid cyclic problems for big batches
  hparams.use_sepconv = True

  return hparams