On Fri, Aug 28, 2020 at 11:03:59AM +0200, Morten Brørup wrote: > > From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Bruce Richardson > > <snip> > > > > Right. For now then, it seems like just documenting a minimum burst > > size is > > reasonable. > > I agree. It is so far from the spirit of DPDK to call rte_eth_rx_burst() with > a small nb_pkts that the driver developers didn't even consider it. The API > documentation needs fixing, not the drivers. > > It doesn't take care of your example 4 packet latency sensitive application, > though. Which BTW also doesn’t work today on drivers with vector support. So > it might not be a real world scenario anyway. :-) > AFAIK, 8 is the smallest burst guaranteed to work everywhere, but I think just about everything bar the AVX2 i40e code path also supports 4 as a burst size. Therefore adjusting to 4 as min-burst might well be reasonable.
/Bruce
