[dpdk-dev] L2FWD Sample Application stops receiving packets after sometime

Jain, Neeraj 3. (NSN - IN/Bangalore) neeraj.3.jain at nsn.com
Thu Mar 20 12:29:45 CET 2014

Found the Problem. Few packet buffers were not being freed which lead to slow leak of mbufs. 


-----Original Message-----
From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of ext Jain, Neeraj 3. (NSN - IN/Bangalore)
Sent: Thursday, March 20, 2014 2:42 PM
To: dev at dpdk.org
Subject: [dpdk-dev] L2FWD Sample Application stops receiving packets after sometime

I am currently running few trials with DPDK sample application for one of my project requirements. Below are the system details under which the sample application (L2 Forward) is being run.

Platform: Linux 2.6.32-358.17.1.el6.x86_64
VMWare: ESXI 5.1
Driver: vmxnet3-usermap

L2 FWD program is being run with a load of ~100K packets per second on RX queue. The sample application successfully forwards the packets to other end for some time. However, after around 1 hour run, I see that rte_eth_rx_burst returns 0 packets received, though the load generator continuously sends packet to the L2 FWD program.
The statistics reported by the sample application also shows the "Packets received:" value stops incrementing.
I also used "rte_eth_stats_get" api to check if any packets are being received on the interface. This api shows the packets are being received at the interface, however rte_eth_rx_burst does not pick these packets.

Can you please help me as to why this behavior is seen. Also, please let me know if you need further details. Thanks


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