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Date:      Tue, 1 Jul 2008 14:27:15 +0200 (CEST)
From:      Ingo Flaschberger <if@xip.at>
To:        Paul <paul@gtcomm.net>
Cc:        freebsd-net@freebsd.org
Subject:   Re: Freebsd IP Forwarding performance (question, and some info) [7-stable, current, em, smp]
Message-ID:  <alpine.LFD.1.10.0807011426180.24529@filebunker.xip.at>
In-Reply-To: <4869A099.5070206@gtcomm.net>
References:  <4867420D.7090406@gtcomm.net> <200806301944.m5UJifJD081781@lava.sentex.ca> <20080701004346.GA3898@stlux503.dsto.defence.gov.au> <alpine.LFD.1.10.0807010257570.19444@filebunker.xip.at> <20080701010716.GF3898@stlux503.dsto.defence.gov.au>  <alpine.LFD.1.10.0807010308320.19444@filebunker.xip.at> <486986D9.3000607@monkeybrains.net> <48699960.9070100@gtcomm.net> <ea7b9c170806302005n2a66f592h2127f87a0ba2c6d2@mail.gmail.com> <4869A099.5070206@gtcomm.net>

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Dear Paul,

> I have been unable to even come close to livelocking the machine with the em 
> driver interrupt moderation.
> So that to me throws polling out the window.  I tried 8000hz with polling 
> modified to allow 10000 burst and it makes no difference

higher hz-values gives you better latenca but less overall speed.
2000hz should be enough.

Kind regards,
 	Ingo Flaschberger




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