> On 6 Dec 2019, at 07:16, Prashant Upadhyaya <praupadhy...@gmail.com> wrote: > > Hi, > > I use VPP with DPDK driver for I/O with NIC. > For high speed switching of packets to and from kernel, I use DPDK KNI > (kernel module and user space API's provided by DPDK) > This works well because the vlib buffer is backed by the DPDK mbuf > (KNI uses DPDK mbuf's) > > Now, if I choose to use a native driver of VPP for I/O with NIC, is > there a native equivalent in VPP to replace KNI as well ? The native > equivalent should not lose out on performance as compared to KNI so I > believe the tap interface can be ruled out here. > > If I keep using DPDK KNI and VPP native non-dpdk driver, then I fear I > would have to do a data copy between the vlib buffer and an mbuf in > addition to doing all the DPDK pool maintenance etc. The copies would > be destructive for performance surely. > > So I believe, the question is -- in presence of native drivers in VPP, > what is the high speed equivalent of DPDK KNI.
You can use dpdk and native drivers on the same time. How KNI performance compares to tap with vhost-net backend? -- Damjan
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