> From: Paul Barker <paul.barker.ct@xxxxxxxxxxxxxx> > > AFAIU, TX is processed without any budget. This wont result in rx work > > starvation if TX traffic is more ? > > Quoting the docs in Documentation/networking/napi.rst: > > The method takes a ``budget`` argument - drivers can process > completions for any number of Tx packets but should only process up > to ``budget`` number of Rx packets. > > skb Tx processing should happen regardless of the ``budget`` > > I take that to mean that the RX work budget running out should not stop > processing of TX packets. > > Other drivers with a combined TX/RX poll function follow the same pattern of > processing TX packets regardless of RX budget exhaustion, for example see > ixgbe_poll() which processes TX packets first (in > drivers/net/ethernet/intel/ixgbe/ixgbe_main.c). ACK. Thanks for pointing out. I had seen some drivers, TX NAPI routines exist to bring fairness to rx and tx. Just wondering, if there is a lot of tx traffic, would RX budget alone can do fairness among NAPI Routines.
