'Call _init_runtime under different CUDA_VISIBLE_DEVICES, you\'ll
have workers that run on multiGPUs'

def _init_runtime(self):

    if (self.idx != 0):
        from tensorpack.models.common import disable_layer_logging
        disable_layer_logging()
    self.predictor = OfflinePredictor(self.config)
    if (self.idx == 0):
        with self.predictor.graph.as_default():
            describe_trainable_vars()
