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From: "VERDOUX, Sylvain" <s.verdoux@evs.com>
To: "users@dpdk.org" <users@dpdk.org>
Thread-Topic: How to debug I40E PMD RX/TX frees
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Date: Mon, 17 Oct 2016 14:45:59 +0000
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Subject: [dpdk-users] How to debug I40E PMD RX/TX frees
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Hello,

I am currently trying a small igmp sample test using dpdk I40E PMD (NIC is =
X710). The code is quite simple and uses 2 lcores to handle a recv loop on =
RX0 and a send loop on TX0. When the recv loop detects a query, it notifies=
 the send loop to emit a report. I use at startup a fdir filter to move the=
 mcast flow to another queue to not be polluted with this flow in my recv l=
oop. For a while it works fine but after some time, the recv loop just stop=
 retrieving queries, and I have difficulties debugging the problem. It seem=
s like a mbuf free problem but even if I have activated I40E debug and mbuf=
 debug in my dpdk config file then recompile it, I can't see any alarming m=
essage. For now I think that I free received mbufs properly and sent mbufs =
should be released by the tx_burst function, so I don't really understand t=
he issue. So I'm asking if tools are available to debug deeply the problem =
?

Thanks,
Best Regards

Sylvain