[dpdk-dev] DPDK delaying individual packets infinitely

Thomas Monjalon thomas.monjalon at 6wind.com
Thu Jan 2 14:59:38 CET 2014

Hello Dmitry,

06/12/2013 14:22, Dmitry Vyal :
> The application consists of two threads, first one sends the packets
> from one port and second receives them on another. These are 2 ports of
> four-ports 1Gb NIC. It's detected as Intel Corporation 82576 Gigabit
> Network Connection (rev 01). Ports are connected with a patch cord.
> So looks like DPDK is buffering first 21 packets and doesn't flush the
> buffer in the first run even if I wait for several seconds after last
> packet is sent. In second run we see it forwards packets one by one
> after first burst of size 21.
> I tried on DPDK-1.3.1 and DPDK-1.5.1 observing similar results. Is it
> expected behavior?

Have you made any progress on this bug ?
Is it an igb-specific issue ? Can you reproduce it with ixgbe ?

Thank you to keep us informed

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