I know DPDK is in userspace. But i know there is also some talkings about AF_XDP , in which xdp program is running in kernel and then w zero copy can be fwd to dpdk app via the PMD AF_XDP
בתאריך יום ב׳, 8 באפר׳ 2019, 21:31, מאת Stephen Hemminger < [email protected]>: > On Mon, 8 Apr 2019 21:16:53 +0300 > Avi Cohen <[email protected]> wrote: > > > Stephen > > I did not understand. Is this eBPF dpdk feature can run in the kernel or > > userspace ? > > Regards avi > > > > בתאריך יום ב׳, 8 באפר׳ 2019, 18:09, מאת Stephen Hemminger < > > [email protected]>: > > > > > On Mon, 8 Apr 2019 17:25:55 +0300 > > > Avi Cohen <[email protected]> wrote: > > > > > > > Hi All, > > > > can someone refer to the flow of a packet that is processed in eBPF > > > > program in the kernel . and then forwarded to DPDK-app in user space. > > > > this was integrated into DPDK 18.05 but not documented. ( > > > > https://doc.dpdk.org/guides-18.05/prog_guide/bpf_lib.html) > > > > what is the PMD type for this flow ? new socket ? what is the > penalty ? > > > > i thought to do some traffic filtering there. > > > > pros/cons ? > > > > Best Regards > > > > Avi > > > > > > > > > Unlike Linux which has a predetermined set of steps in processing > packets. > > > DPDK is a raw toolkit where the processing is composed totally by the > > > network application. > > > > > > Therefore DPDK has a raw eBPF library, it is up to the application to > > > install it where > > > it wants in the packet processing. One example is done via rx and tx > > > callbacks > > > as shown in the rte_bpf_ethdev.h. > > > > > DPDK is all in userspace. The eBPF library is just another facility > like LPM lookup, hash library and ACL. >
