Date: Thu, 28 Apr 2016 11:13:45 -0700 From: bazzoola <bazzoola@gmail.com> To: freebsd-net@freebsd.org Subject: netmap overrun counters Message-ID: <cd306a81-3a4b-6386-a059-73d455d3c931@gmail.com>
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Hi! Two questions: (1) Is there a way to know when netmap rx rings overrun? Most NIC drivers provide MPC (missed packet count) and sysctl for rx_overrun. I would like to know if my application is not reading as fast, i.e., no frames are being dropped. (2) What is the benefit of NETMAP_DO_RX_POLL? I do see the buffers being updated when I set this flag but 'tail' is not advancing unless I read. Bazz
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