Hi, I'm using pf_ring 6.6.0 (no ZC) on CentOS 7, on 10G interfaces (ixgbe drivers). As far as I understand the relation between poll-watermark and poll-duration, packets will be queued untill one of comes first: or passing the poll-watermark packets threshold, or a poll-duration milliseconds has passed. I set poll-watermark to the maximum (4096) (using pfring_set_poll_watermark()) and set poll-duration to the minimum (1) (using pfring_set_poll_duration()). I've sent 400 packets to the socket. I see that they are received by the NIC, but they didn't pass to userland. Only when passing 500 packets, a chunk of them passed to userland. I don't quite understand the behavior: since poll-duration is 1 (millisecond I assume), I've expected all the packets to pass to userland immediately, even though poll-watermark is much higher.
Can anyone shed some light on the above? Thanks, Amir
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