code: def aligned_8k_grouped():
    
    hparams = aligned_grouped()
    hparams.batch_size = 8192
    # hparams.attention_image_summary = False
    hparams.num_groups = 16
    hparams.multiplicative_overhead = 1.1
    return hparams
docs: version for languagemodel_wiki_scramble8k50.
  
    languagemodel_wiki_scramble1k50, 1gpu, 7k steps: log(ppl)_eval = 2.92
    3.3 steps/sec on P100
    8gpu (8x batch), 7k steps: log(ppl)_eval = 2.15
  
    Returns:
      a hparams object