Date: Thu, 26 Feb 2004 22:36:25 -0800 (PST) From: Aloha Guy <alohaguy123@yahoo.com> To: Chris Dillon <cdillon@wolves.k12.mo.us> Cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD box as router adding latency Message-ID: <20040227063625.54127.qmail@web41312.mail.yahoo.com> In-Reply-To: <20040226155909.E29441@duey.wolves.k12.mo.us>
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Chris Dillon <cdillon@wolves.k12.mo.us> wrote: On Thu, 26 Feb 2004, Aloha Guy wrote:
> > What do you have HZ set to (see sysctl kern.clockrate)? I think I
> > remember your original message showing you using pipes and queues
> > and the HZ setting can affect those. Also see if your latency
> > improves if you remove all pipe and queue rules (other ipfw rules
> > are OK).
>
>
> Here is the HZ setting:
>
> kern.clockrate: { hz = 100, tick = 10000, profhz = 1024, stathz = 128 }
>
> I'm not sure how to remove the pipe since I don't think the pipe
> works until the queue is defined. When I removed the queues that
> are configured for the pipe, the latency is back to normal though.
Like I said, remove both pipes and queues to test. However, pipes
_can_ be used without queues, but that is irrelevant here. Try
setting HZ to 1000 in your kernel config, recompile, reboot, and test
again. You should see something between a slight improvement to a
ten-fold improvement.
Already tried that and it did improve things a little. I tried setting the HZ to 1000 and it didn't make much of a difference. Is there a larger number that actually works well?
Thanks,
John
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