Hi Zoltan, > -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Zoltan Kiss > Sent: Friday, July 24, 2015 4:00 PM > To: Richardson, Bruce; dev at dpdk.org > Subject: [dpdk-dev] ixgbe vPMD RX functions and buffer number minimum > requirement > > Hi, > > I was thinking how to handle the situation when you call > rte_eth_rx_burst with less than RTE_IXGBE_VPMD_RX_BURST buffers. In > ODP-DPDK unfortunately we can't force this requirement onto the calling > application. > One idea I had to check in ixgbe_recv_pkts_vec() if nb_pkts < > RTE_IXGBE_VPMD_RX_BURST, and call ixgbe_recv_pkts_bulk_alloc in that > case. Accordingly, in ixgbe_recv_scattered_pkts_vec() we could call > ixgbe_recv_scattered_pkts() in this case. A branch predictor can easily > eliminate the performance penalty of this, and applications can use > whatever burst size feasible for them. > The obvious problem could be whether you can mix the receive functions > this way. I have a feeling it wouldn't fly, but I wanted to ask first > before spending time investigate this option further.
No, it is not possible to mix different RX functions, they setup/use ixgbe_rx_queue fields in a different manner. Konstantin > > Regards, > > Zoltan
