Thanks Toke and Dave for the response with explanation and knowledge which explains that its work in progress !! Thanks ! On Sat, Jan 7, 2023 at 10:49 AM Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote: > > Dave Taht <dave.taht@xxxxxxxxx> writes: > > > On Sat, Jan 7, 2023 at 10:08 AM team lnx <teamlnxi8@xxxxxxxxx> wrote: > >> > >> sure, during xdp redirect i found that sometimes the number of packets > >> arrived are too many for an interface > > > > That is often the case. > > > >> to handle in which case. Hence thought to experiment with tx pause to > >> make room for successive packets and then unpause ! > > > > "pauses" are really not how the internet works, there needs to be end > > to end signalling to "slow down", either via packet loss, or marking. > > RFC970 is a good read here. > > Actually it is, kinda, at this level: Pausing the TX interface (when the > HWQ is full) is how the regular network stack creates backpressure > against the qdisc, which is what allows fq_codel and friends to > function. This is missing entirely from the XDP redirect path, which is > what we're trying to fix... > > -Toke >
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