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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