Thanks for bringing up the discussion > -----Original Message----- > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Thomas > Monjalon via Lists.Fd.Io > Sent: Monday, December 2, 2019 4:35 PM > To: vpp-dev@lists.fd.io > Cc: vpp-dev@lists.fd.io > Subject: [vpp-dev] efficient use of DPDK > > Hi all, > > VPP has a buffer called vlib_buffer_t, while DPDK has rte_mbuf. > Are there some benchmarks about the cost of converting, from one format to > the other one, during Rx/Tx operations? > > I'm sure there would be some benefits of switching VPP to natively use the > DPDK mbuf allocated in mempools. > What would be the drawbacks? > > Last time I asked this question, the answer was about compatibility with > other driver backends, especially ODP. What happened? I think, the ODP4VPP project was closed sometime back. I do not know of anyone working on this project anymore.
> DPDK drivers are still the only external drivers used by VPP? > > When using DPDK, more than 40 networking drivers are available: > https://core.dpdk.org/supported/ > After 4 years of Open Source VPP, there are less than 10 native drivers: > - virtual drivers: virtio, vmxnet3, af_packet, netmap, memif > - hardware drivers: ixge, avf, pp2 > And if looking at ixge driver, we can read: > " > This driver is not intended for production use and it is unsupported. > It is provided for educational use only. > Please use supported DPDK driver instead. > " > > So why not improving DPDK integration in VPP to make it faster? > > DPDK mbuf has dynamic fields now; it can help to register metadata on > demand. > And it is still possible to statically reserve some extra space for > application- > specific metadata in each packet. > > Other improvements, like meson packaging usable with pkg-config, were > done during last years and may deserve to be considered. >
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