Hi Chengqiang, Thanks for your reply.
On Wed, Aug 14, 2019 at 11:52 PM Yao, Chengqiang <chengqiang....@intel.com> wrote: > > Hi William, > > You do not need to copy the packets out of memif. Once you finish > processing all these packets, call memif_refill_queue() function to free > these buffers. Let's say if you receive 32 packets in memif_rx_burst > function, after processing, call memif_refill_queue with count=32 to free. > But if I calling memif_refill_queue() with count=32, then where does libmemif get the 32 free buffer to refill on rx? And if my code is not copying packet buffer from dev->rx_bufs, how does libmemif know that I'm done with these 32 packet buffer and libmemif can re-cycle them back to rx? Regards, William > > Best Regards, > Chengqiang Yao > > > > -----Original Message----- > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of William Tu > Sent: 2019年8月15日 2:07 > To: vpp-dev@lists.fd.io > Subject: [vpp-dev] Question about libmemif API > > Hi, > > I'm working on using libmemif in OVS. > https://patchwork.ozlabs.org/patch/1140858/ > > While using the API, one question I have is, when I call > err = memif_rx_burst(dev->handle, qid, dev->rx_bufs, NETDEV_MAX_BURST, > &recv); > > There are 'recv' number of packets are at dev->rx_bufs, do I have to copy the > packet buffer immediately to my master side? For example, I received 32 > packets from memif_rx_burst, and I might process these packets in different > order. Once done, is there an API to free each specific packet buffer back to > memif buffer pool? > > Now the memif_refill_queue() can only specify number of buffers to refill, > not which buffer. > > Thanks > William > -=-=-=-=-=-=-=-=-=-=-=- > Links: You receive all messages sent to this group. > > View/Reply Online (#13743): https://lists.fd.io/g/vpp-dev/message/13743 > Mute This Topic: https://lists.fd.io/mt/32866729/675822 > Group Owner: vpp-dev+ow...@lists.fd.io > Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [u9012...@gmail.com] > -=-=-=-=-=-=-=-=-=-=-=-
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