Hi,
As far as I understand, DPDK vhost-user implementation requires data copy for either RX or TX (rte_vhost_dequeue_burst() and rte_vhost_enqueue_burst()). It means that two data copies are needed to transfer a packet from one VM to another. Why is not it possible to eliminate one of the copies (e.g., rte_vhost_enqueue_burst() might set up a reference at vring descriptor to mbuf's data rather than copying the data)? -- Best regards, Nikita Kalyazin, n.kalyazin at samsung.com CE OS Group Samsung R&D Institute Russia Tel: +7 (495) 797-25-00 #3816 Tel: +7 (495) 797-25-03 Office #1501, 12-1, Dvintsev str., Moscow, 127018, Russia
