Hi, ben Thanks for your hint, i used vlib_buffer_clone() to copy packet， but the performance is drop i found that vlib_buffer_clone is use vlib_buffer_alloc()，is there other way to improve performance？
by the way，i also used rte_mbuf_from_vlib_buffer() to use dpdk‘s rte_mbuf to use dpdk buf refcnt， but this way need to copy vpp's buffer to dpdk buffer， can vpp use dpdk's rte_mbuf directly? best wanghe Benoit Ganne (bganne) via lists.fd.io <bganne=cisco....@lists.fd.io> 于2022年8月1日周一 15:08写道： > You probably want to use vlib_buffer_clone() instead. > > Best > ben > > > -----Original Message----- > > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of NUAA?? > > Sent: Monday, August 1, 2022 4:53 > > To: vpp-dev@lists.fd.io > > Subject: [vpp-dev] Copy packet forwarding performance issues > > > > Hi，vpp experts > > I have a task that send one packet to three NIC > > my method is that use "vlib_buffer_alloc" function to copy three buffer， > > but this method is poor performance，about that if vpp is 10G bps， once > > copy will reduce 1.5G bps > > > > is vpp has like dpdk buffer use refcnt count to avoid copy buffer？ can > > you give me some suggestions to send packet with high performence？ > > > > Best wish > > wanghe > > > > > > > > >
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