def estimate_flops(self, batch_seqlens, delta_time):
        """
        Estimate the FLOPS based on the number of valid tokens in the current batch and the time taken.

        Args:
            batch_seqlens (List[int]): A list where each element represents the number of valid tokens in the current batch.
            delta_time (float): The time taken to process the batch, in seconds.

        Returns:
            estimated_flops (float): The estimated FLOPS based on the input tokens and time.
            promised_flops (float): The expected FLOPS of the current device.
        """
        tokens_sum = sum(batch_seqlens)
        func = self.estimate_func.get(self.config.model_type, self._estimate_unknown_flops)
        estimated_flops = func(tokens_sum, batch_seqlens, delta_time)
        promised_flops = get_device_flops()
        return estimated_flops, promised_flops

        Estimate the FLOPS based on the number of valid tokens in the current batch and the time taken.

        Args:
            batch_seqlens (List[int]): A list where each element represents the number of valid tokens in the current batch.
            delta_time (float): The time taken to process the batch, in seconds.

        Returns:
            estimated_flops (float): The estimated FLOPS based on the input tokens and time.
            promised_flops (float): The expected FLOPS of the current device.
        
verl/utils/flops_counter.py