Date: Sat, 18 Feb 2006 15:04:27 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Wolfgang Zenker <wolfgang@saturn.lyxys.ka.sub.org> Cc: freebsd-stable@freebsd.org Subject: Re: high interrupt load under 6.0? Message-ID: <20060218210427.GG52817@dan.emsphone.com> In-Reply-To: <200602182011.k1IKBB7a079573@saturn.lyxys.ka.sub.org> References: <1140292322.11473.10.camel@honker.internal.dcrosstech.com> <200602182011.k1IKBB7a079573@saturn.lyxys.ka.sub.org>
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In the last episode (Feb 18), Wolfgang Zenker said: > > I have a 486DX50 firewall that has been serving me well for a > > number of years. I recently upgraded it fro 5.4 to 6.0 and > > performance plumeted rather drastically (about 40%). I would like > > to fix it. What I have noticed is that even when sitting idle the > > system spends ~20% of its time in interrupt. Below I have included > > dmesg, kernel config, and vmstat -i information. > > [..] > > interrupt total rate > > irq0: clk 203894894 1000 > > a clock rate of 1000 Hz is probably to high for a 486 class cpu. You > should add "options HZ=100" to your kernel config to get back to the > 100 Hz that where default before 6.0 Or add kern.hz="100" to your /boot/loader.conf if you don't want to rebuild your kernel. -- Dan Nelson dnelson@allantgroup.com
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