From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Subject: Re: phantom old packets received in new mbuf
Date: Wed, 16 Jul 2014 14:04:01 +0200
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To: Helmut Sim <simhelmut-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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Hi,

2014-07-16 13:56, Helmut Sim:
> then i see that from time to time i get a packet that was already received
> earlier instead of receiving the expected packet.
> the output is:
> PKT 12201
> PKT 12202
> PKT 12203
> PKT 12204
> PKT 12205
> PKT 12206
> PKT 12202
> PKT 12208
> 
> total received pkts is identical to the total delivered pkts, but part of
> the pkts are being received twice...

It's an interesting issue. Could you list drivers and NICs you have tested?
Are you using a virtualized environment?

I think the best tools you can use are logs and gdb.
But maybe someone will have an idea of the cause when you'll describe impacted 
PMDs and environment.

-- 
Thomas