Re: Tuning Ggiabit
From: Simon L. Nielsen (simon_at_nitro.dk)
Date: 06/28/03
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Date: Sat, 28 Jun 2003 13:43:46 +0200 To: Craig Reyenga <craig@craig.afraid.org>
On 2003.06.28 03:35:43 -0700, Craig Reyenga wrote:
> (This message may show up three times, I apologise if so.)
>
> Hi,
>
> I've been trying to get my gigabit link to run as fast as possible, but I
> have run out of ideas. I've documented (though not very well) what I have
> done thus far:
>
> http://craig.afraid.org/a/b?page=computer/gigabit
>
> If there is any more I can do besides what I have already done, I would love
> to hear it. Please avoid suggestions that require spending money.
>
> Thanks in advance,
When using the em driver under FreeBSD, it can be useful to try to
addjust some tuneables in sys/dev/em/if_em.h. Specifically EM_RDTR and
EM_TADV.
With the hardware in the FreeBSD box I don't think you should expect it
to go that fast, since the bus/CPU will be the bottleneck.
I would suggest looking at vmstat and similar tools. It can be very
useful to find what the bottleneck really is.
-- Simon L. Nielsen
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