Date: Thu, 27 Apr 2006 09:06:47 +0200 From: Ferdinand Goldmann <ferdinand.goldmann@jku.at> To: freebsd-net@freebsd.org Subject: Re: Packet loss with traffic shaper and routing Message-ID: <44506D87.1020808@jku.at> In-Reply-To: <59615.200.230.201.250.1146083577.squirrel@www.widemail.com.br> References: <49594.200.230.201.250.1146063341.squirrel@www.widemail.com.br> <444F8E89.2050905@wildcard.net.uk> <56286.200.230.201.250.1146067775.squirrel@www.widemail.com.br> <1146073590.1089.80.camel@sky.mediasat.ro> <59615.200.230.201.250.1146083577.squirrel@www.widemail.com.br>
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tpeixoto@widesoft.com.br wrote:
> Hello.
>
> I did that and compiled the kernel.
> Then I restarted the system and enabled sysctl kern.polling.enable=1
>
> It seems that it has no effect in the system. Maybe bge driver doesn't
> like polling?
At least from a quick glance in the polling(4) manpage I cannot see that bge
is among the supported devices.
If you want to use polling, I suppose that you need to enable it via ifconfig,
too:
polling
If the driver has user-configurable polling(4) support, select
the polling mode on the interface.
> At this moment, I'm getting more than 50% interrupts and 20% packets lost.
> I also disabled HT in BIOS and the interrupts are now passing 80% mark.
> Don't know what else to do. Aren't these cards supposed to work at
> 100Mbits or 1Gbit? They are failing with 12Mbits traffic on a 100Mbits
> LAN. Something is wrong and I am having a hard time trying to identify the
> problem.
>
> Thanks for the hints, anything else would be greatly appreciated.
Several wild guesses from my own experiences here:
- SMP + networking in 5.x does not work too well, using em(4) I experienced
VERY poor performance (only ~5MB/s over a Gbit link)
- Try upgrading to 6.x (as others have already suggested). I experienced all
kind of weird problems with 5.x, and although there is no proof that the
problems were actually related to 5.x, 6.x seems to work better.
- What's the value of nmbclusters? Have you checked netstat -m? Do you see
memory requests for network memory denied?
- 50% interrupts on such a fast machine is quite high. I currently experience
about 30% interrupt load using two em(4) cards, shaping for about ~2000
clients on a 3.8GHz Xeon.
Kind regards
--
>> Ferdinand Goldmann //// | |
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>> Tel. : +43/732/2468/9398 Fax. : +43/732/2468/9397 C ^ | |
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