On Thu, Jan 08, 2015 at 01:40:54PM +0530, Prashant Upadhyaya wrote: > Hi, > > I am migrating from DPDK1.7 to DPDK1.8. > My application works fine with DPDK1.7. > I am using 10 Gb Intel 82599 NIC. > I have jumbo frames enabled, with max_rx_pkt_len = 10232 > My mbuf dataroom size is 2048+headroom > So naturally the ixgbe_recv_scattered_pkts driver function is triggered for > receiving. > This works with DPDK1.7 and my app receives packets. > However, it does not work with DPDK1.8 somehow.I don't receive any packets. > > So, I increased the mbuf data room size in my application to a higher value > so that the function ixgbe_recv_scattered_pkts is not enabled (I believe > ixgbe_recv_pkts will be used in this case), and now my application starts > getting packets with DPDK1.8 and the entire application usecase works fine > (ofcourse my application had to adapt to the mbuf structure changes which I > have done) > > I am kind of coming to the conclusion that ixgbe_recv_scattered_pkts has > something broken in DPDK1.8 as compared to the earlier versions by the > above empirical evidence. > > Has anybody else faced a similar issue ? > > Regards > -Prashant
This is worrying to hear. In 1.8, there is now the receive_scattered_pkts_vec function which manages changed mbufs. This was tested - both in development and in validation - before release, but since it's new code, it's entirely possible we missed something. Can you perhaps try disabling the vector driver in 1.8, and see if receiving scattered packets/chained mbufs works? Regards, /Bruce
