t.compute_time is printing the difference between iteration_time and data_time.
I’m using the logger from the NVIDIA script that I mentioned above with DLLogger 1 as the logging backend. The logging code that I excluded in my initial post is:
        if logger is not None:
            logger.log_metric("t.loss", to_python_float(loss), batch_size)
            logger.log_metric("t.data_speed", calc_speed(batch_size, data_time))
            logger.log_metric("t.compute_speed", calc_speed(batch_size, iteration_time - data_time))
            logger.log_metric("t.iteration_speed", calc_speed(batch_size, iteration_time))
            logger.log_metric("t.data_time", data_time)
            logger.log_metric("t.compute_time", iteration_time - data_time)
            logger.log_metric("t.iteration_time", iteration_time)

The print logs are actually much larger but above I only showed the relevant part for conciseness.