Date: Wed, 4 Jun 2003 17:52:01 -0400 From: Damian Gerow <damian@sentex.net> To: net@freebsd.org Subject: polling in 5.1-RC1 causes 100% CPU usage Message-ID: <20030604215201.GH727@sentex.net>
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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%.
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