UTSL. :)

vlib_buffer_enqueue_to_thread (vlib_main_t * vm, u32 frame_queue_index,
...
      to_next_thread[0] = buffer_indices[0];
      to_next_thread++;
      n_left_to_next_thread--;

i.e., it does not copy the buffers.

Thanks,
Chris.

> On Sep 10, 2019, at 3:24 AM, wei_sky2...@163.com wrote:
> 
> Thank you for your response。
>  I still have another question,does this mechanism involve copying?We need to 
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