message: [tf.data] Replace port::MaxParallelism() with port::NumSchedulableCPUs() to reflect the available hardware CPUs.
diff: @@ -725,7 +725,7 @@ void ParallelMapDatasetOp::MakeDataset(OpKernelContext* ctx, DatasetBase* input,
  if (num_parallel_calls == model::kAutotune) {
  if (GetExperiments().contains("max_parallelism")) {
  - num_parallel_calls = port::MaxParallelism();
  + num_parallel_calls = port::NumSchedulableCPUs();
  } else {
  metrics::RecordTFDataAutotune(kDatasetType);
  }
  