Date: Mon, 19 Jul 2010 11:24:38 -0400 From: Ryan Stone <rysto32@gmail.com> To: beezarliu <beezarliu@yahoo.com.cn> Cc: freebsd-net <freebsd-net@freebsd.org>, Jack Vogel <jfvogel@gmail.com> Subject: Re: igb statistics error Message-ID: <AANLkTilbicgjvelddGTxnrXh6R2j8Am_3Vho6sgrXQ35@mail.gmail.com> In-Reply-To: <201007191659457506137@yahoo.com.cn> References: <201007191659457506137@yahoo.com.cn>
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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.
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