device pooling and high interrupts

[GiZmen]

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

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