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Date: Mon, 19 Jul 2010 11:24:38 -0400
Message-ID: <AANLkTilbicgjvelddGTxnrXh6R2j8Am_3Vho6sgrXQ35@mail.gmail.com>
From: Ryan Stone <rysto32@gmail.com>
To: beezarliu <beezarliu@yahoo.com.cn>
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Cc: freebsd-net <freebsd-net@freebsd.org>, Jack Vogel <jfvogel@gmail.com>
Subject: Re: igb statistics error
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If you look at the datasheet you will see that the statistics do not
measure the same thing(why would Intel implement two hardware counters
that measure the same thing?).  The Good Packets Received Count
measures the number of valid packets that passed one of the receive
filters.  In other words, it measures the number of valid packets that
were addressed to that interface.  The Total Packets Received
statistic measures the total number of valid packets received,
including packets that do not pass any filters.  In other words, it
measures the number of (valid?) packets received by the interface,
whether or not they were addressed to it.