Date: Thu, 5 Jun 2003 11:18:08 -0400 From: Damian Gerow <damian@sentex.net> To: net@freebsd.org Subject: Re: polling in 5.1-RC1 causes 100% CPU usage Message-ID: <20030605151808.GJ727@sentex.net> In-Reply-To: <DdTOkC.A.39N.Hom3-@coal.sentex.ca> References: <DdTOkC.A.39N.Hom3-@coal.sentex.ca>
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Thus spake Damian Gerow (damian@sentex.net) [04/06/03 17:52]: > I just upgraded a home firewall from 4.8-STABLE to 5.1-RC1. In the process > of updating, I also brought in a new motherboard, CPU, and memory. However, > all the NICs in the box are the same. > > The problem is that with polling turned on, CPU usage sits at 100%. As soon > as I turn /off/ polling, it drops. This is very easily reproducible: > > # sysctl -w kern.polling.enable=1 > > Then do a 'systat -vm', and watch as the interrupt load jumps from about > 0.5% to 18-19%. Hmmmm.. Perhaps I could have included more details? The system /was/ a P100S, and is now a Via C3. The three network cards are one rl and two fxp.
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