Any pointers to what the issue could be? thanks

On Fri, Mar 25, 2016 at 4:13 PM, Clarylin L [off-list ref] wrote:

Hello,

I am trying to use multi-segment mbuf to receive large packet. I enabled
jumbo_frame and enable_scatter for the port and was expecting mbuf chaining
would be used to receive packets larger than the mbuf size (which was set
to 2048).

When sending 3000-byte (without fragmentation) packet from another
non-dpdk host, I didn't see packet was received by the ixgbe PMD driver.

After a quick debugging session I found that the following statement in ixgbe_recv_scattered_pkts
(ixgbe_rxtx.c) is
always true and break the loop in case of large packet, while it's not the
case for small packet (smaller than mbuf size):

if (! staterr & rte_cpu_to_le32(IXGBE_RXDADV_STAT_DD))
    break;

Is enabling jumbo_frame and enable_scatter good enough to get started the
mbuf chaining?

Appreciate any input! Thanks.