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Date:      Wed, 4 Mar 2009 13:18:22 -0800
From:      Freddie Cash <fjwcash@gmail.com>
To:        freebsd-ipfw@freebsd.org
Subject:   Re: ipfw (dummynet) adds delay, but not configured to do so
Message-ID:  <200903041318.23083.fjwcash@gmail.com>
In-Reply-To: <20090304211409.GA29824@onelab2.iet.unipi.it>
References:  <49AED3B1.1060209@net.t-labs.tu-berlin.de> <49AEED31.8060801@net.t-labs.tu-berlin.de> <20090304211409.GA29824@onelab2.iet.unipi.it>

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On March 4, 2009 1:14 pm Luigi Rizzo wrote:
> On Wed, Mar 04, 2009 at 10:05:53PM +0100, Sebastian Mellmann wrote:
> > > On Wed, Mar 04, 2009 at 08:17:05PM +0100, Sebastian Mellmann wrote:
> > > the delay that a packet experiences corresponds to len/bandwidth,
> > > often rounded up to the next clock tick (1ms is the default).
> > > You get one delay inbound, one delay outbound, so that's 2ms.
> >
> > Is there any chance to change this clock tick to a lower value?
> > I think it's the 'HZ=' option in the kernel config isn't it?
>
> yes. i believe there is a tunable (so you don't need to rebuild
> the kernel) but i do not remember exactly which one.

kern.hz in /boot/loader.conf

-- 
Freddie
fjwcash@gmail.com



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