Date: Mon, 8 Mar 2004 10:17:32 -0500 From: Don Bowman <don@sandvine.com> To: 'Karl Pielorz' <kpielorz@tdx.co.uk>, freebsd-isp@freebsd.org Subject: RE: FreeBSD polling mode - count 'lost' packets? Message-ID: <FE045D4D9F7AED4CBFF1B3B813C85337045D8422@mail.sandvine.com>
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From: Karl Pielorz [mailto:kpielorz@tdx.co.uk] > Hi All, > > We've been running a number of FreeBSD boxes with high packet > throughputs > using polling mode. > > This seems to work great (gets rid of 90k odd interrupts a second). > > Is there any easy way of finding out how many packets are > being 'dropped' > in this system? (We use em Intel Pro 1000TX cards) - as > obviously, there is > a finite limit to the number of packets the system can push - > is there any > mechanism, or flag, or anything that will warn you if by the time the > drivers get to poll the card, it's overflowed/lost packets? > > Thanks, netstat -i will tell you these things, look for ifInErrors, ifOutErrors. sysctl kern.polling will indicate if you can't poll fast enough.
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