[dpdk-dev] Random packet drops with ip_pipeline on R730.

["husainee" <husainee.plumber@nevisnetworks.com>]

Hi

I am using a DELL730 with Dual socket. Processor in each socket is
Intel(R) Xeon(R) CPU E5-2603 v3 @ 1.60GHz- 6Cores.
The CPU layout has socket 0 with 0,2,4,6,8,10 cores and socket 1 with
1,3,5,7,9,11 cores.
The NIC card is i350.

The Cores 2-11 are isolated using isolcpus kernel parameter. We are
running the ip_peipeline application with only Master, RX and TX threads
(Flow and Route have been removed from cfg file). The threads are run as
follows

- Master on CPU core 2
- RX on CPU core 4
- TX on CPU core 6

64 byte packets are sent from ixia at different speeds, but we are
seeing random packet drops.  Same excercise is done on core 3,5,7 and
results are same.

We tried the l2fwd app and it works fine with no packet drops.

Hugepages per 1024 x 2M per socket.


Can anyone suggest what could be the reason for these random packet drops.

regards
husainee