[Soekris] openbsd36/net4501 interrupt problems?

Bernd Walter ticso at cicely12.cicely.de
Wed Jan 26 12:41:37 UTC 2005

On Tue, Jan 25, 2005 at 10:05:13AM +0100, Poul-Henning Kamp wrote:
> In message <41F5F7CA.40901 at bik-gmbh.de>, Florian Hars writes:
> >Aaron Richton wrote:
> >> This sounds curiously like
> >> http://lists.freebsd.org/pipermail/freebsd-current/2003-September/009815.html
> >> Hopefully there's similar work out there for OpenBSD, in your case?
> >
> >I tried the modifications from FreeBSD-Current on OpenBSD 3.6 on my NET4801, 
> >with limited success. The maximum data rate through the soekris did in fact 
> >increase from about 20Mbit/s to almost 23Mbit/s, but it still spends all the 
> >time in interrupt processing so that the watchdog timer reboots the box during 
> >large file transfers.
> I am working on this issue in FreeBSD, but we are somewhat limited by the cpu
> power we have availabel.

I usually set net.inet.ip.maxfragpackets=0 in FreeBSD.
Otherwise a high rate ping with fragmented packets is enough to stop
the box from doing real work.

B.Walter                   BWCT                http://www.bwct.de
bernd at bwct.de                                  info at bwct.de

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