On 2018年03月01日 20:56, Zhang, Qi Z wrote:
BTW, performance test shows our PMD can reach 94%~98% of the
orignal benchmark when share memory is enabled.
Hi:
Looks like zero copy is not used in this series. Any plan to support that?
Zero copy is enabled in patch 5, if a mempool passed check_mempool,
it will be registered to af_xdp socket.
so there will be no memcpy between mbuf and af_xdp.
Aha, I see. So the zerocopy was limited to some specific use case. And if I
understand it correctly, zc mode could not be used for VM.
I think except the limitation for mempool layout, zerocopy is transparent to
DPDK application, only difference is performance.
Sorry, I may not get your point, if you could explain more about the VM usage.
Regards
Qi
No problem, so the question is:
Can zerocopy be used when using testpmd to foward packets between
vhost-user and AF_XDP socket?
Thanks
