[Ntop-misc] Using DNA devices, pfring_send() sometimes fails to a ring that's also receiving

Fri, 14 Oct 2011 12:03:26 -0700 

I'm using ixgbe ports via DNA with pf_ring 5.1.0. My code uses
pfring_recv() to receive packets from one ring, then uses pfring_send()
to transmit them via another ring. The code works fine *unless* the
other ring is *also* receiving packets at the same time on another
thread. In that case, pfring_send() fails a few times out of a hundred.
Is there some ring locking requirement that I'm missing?
-don
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