Date: Fri, 4 Sep 2009 16:11:00 +0200 From: Adrian Penisoara <ady@freebsd.ady.ro> To: alexpalias-bsdnet@yahoo.com Cc: freebsd-net@freebsd.org Subject: Re: em driver input errors Message-ID: <78cb3d3f0909040711i5702c4c7l4dbb89bb1fef259a@mail.gmail.com> In-Reply-To: <11420.28890.qm@web56404.mail.re3.yahoo.com> References: <11420.28890.qm@web56404.mail.re3.yahoo.com>
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Hi, On Sat, Aug 1, 2009 at 3:05 PM, <alexpalias-bsdnet@yahoo.com> wrote: > Good day > > I'm running a FreeBSD 7.2 router and I am seeing a lot of input errors on= one of the em interfaces (em0), coupled with (at approximately the same ti= mes) much fewer errors on em1 and em2.=A0 Monitoring is done with SNMP from= another machine, and the CPU load as reported via SNMP is mostly below 30%= , with a couple of spikes up to 35%. First question that comes to mind is: have you tried device polling ? Looking up the thorough decscription you made it appears not to. Please check the polling(4) manual page and Luigi's page [1] for detailed information. Basically it switches the device driver from interrupt mode to polling mode, allowing to specify the user/system CPU usage fraction. [1] http://info.iet.unipi.it/~luigi/polling/ Regards, Adrian Penisoara EnterpriseBSD
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