Date: Wed, 23 Feb 2011 12:25:39 -0300 From: Patrick Tracanelli <eksffa@freebsdbrasil.com.br> To: ipfw@freebsd.org Subject: Excessive "intr" CPU usage caused by Dummynet Message-ID: <8B6C1E5B-F1EA-46DC-816B-27F204449C32@freebsdbrasil.com.br>
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Hello Gentlemen, What may cause dummynet to exaust CPU cycles on kernel "intr" requests? I am facing a situation where "top -S" shows something like that: 12 root 13 -60 - 0K 104K WAIT 0 744:58 82.50% intr And when I get into >95% intr cpu usage, packets on dummynet raise their = latency a lot, slowing down everything (pipe or queue). Queue sizes are ajusted according to pipe bandwidth, using a sort of = rule where queue in bytes is equal to pipe width divided by 8 or by 10. Thank you. -- Patrick Tracanelli FreeBSD Brasil LTDA. Tel.: (31) 3516-0800 316601@sip.freebsdbrasil.com.br http://www.freebsdbrasil.com.br "Long live Hanin Elias, Kim Deal!"
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