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.
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
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