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Date:      Wed, 05 Dec 2007 02:11:52 +0100
From:      Philipp Wuensche <cryx-freebsd@h3q.com>
To:        Bill Moran <wmoran@collaborativefusion.com>
Cc:        "freebsd-performance@freebsd.org" <freebsd-performance@freebsd.org>
Subject:   Re: tuning for high connection rates
Message-ID:  <4755FAD8.5030805@h3q.com>
In-Reply-To: <20071204195131.56cb1307.wmoran@collaborativefusion.com>
References:  <4755ED57.6030603@h3q.com> <20071204195131.56cb1307.wmoran@collaborativefusion.com>

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Bill Moran wrote:
> 
> Enable polling on the interface and see if that helps.  See man polling.

We tried polling already and it didn't help at all.

As I understand it, and correct me if I'm wrong, polling helps against
high interrupt rates but for that intel gigabit cards have interrupt
moderation. We don't have a problem with interrupts (20% CPU) at the
moment but with system (100% CPU) as you can see in the system
monitoring graphs. Interrupts sometimes peak at, but usually are under,
the 2k interrupts/sec limit.

greetings,
cryx




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