Re: device pooling and high interrupts
From: Mike Silbersack (silby_at_silby.com)
Date: 04/24/04
- Previous message: Dmitry Morozovsky: "Re: device pooling and high interrupts"
- In reply to: GiZmen: "device pooling and high interrupts"
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Date: Sat, 24 Apr 2004 13:14:26 -0500 (CDT) To: GiZmen <gizmen@blurp.one.pl>
On Sat, 24 Apr 2004, GiZmen wrote:
> Hello,
>
> I am runnign freebsd 5.2.1 on 386 arch with two rl lan cards. My mainboard
> is on VIA KT 266A with AMD athlon 1.1.
> I read man polling and i have HZ=1000. My problem is that when i set up
> sysctl variable kern.polling.enable=1 my interrupts greatly increase.
> When my system is idle and indicate 0-1% interrupts with out polling.
> and when i turn on polling interrupts goes up to about 20% on idle system.
> Is it normal ? I never before use polling and i dont know that i have
> something bad in my system ?
>
> Can somebody explain me this ?
>
> thx
> --
> Best Regards:
> GiZmen
Ruslan can probably jump in and give you a better explanation than I can,
but I'll try to provide a quick answer. In short, the rl cards + driver
are not well suited to polling and will not work well with it enabled.
Support for polling on rl may in fact be removed as a result of this.
Mike "Silby" Silbersack
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- Previous message: Dmitry Morozovsky: "Re: device pooling and high interrupts"
- In reply to: GiZmen: "device pooling and high interrupts"
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