Date: Sun, 31 Aug 1997 12:09:24 -0700 (PDT) From: mef@cs.washington.edu To: Shimon@i-connect.net Cc: FreeBSD-SMP@FreeBSD.ORG Subject: Re: Open Issues on P6DNH Message-ID: <199708311909.MAA12729@tweetie-bird.cs.washington.edu> In-Reply-To: <XFMail.970815225550.Shimon@i-Connect.Net> (message from Simon Shapiro on Fri, 15 Aug 1997 22:55:50 -0700 (PDT))
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Simon,
What the deal with the P6DNH motherboard from Supermicro? A while
back you posted a set of problems to the smp mailing list. Are these
now resolved? Is the P6DNH MB a good one to buy if one wants to play
around with i2o?
Thanks,
Marc
Date: Fri, 15 Aug 1997 22:55:50 -0700 (PDT)
Organization: Atlas Telecom
From: Simon Shapiro <Shimon@i-connect.net>
Hi Steve,
Sorry for the long delay. Had to design and code a new filesystem type,
fight a bunch of political battles, and get a misely raise after a
wonderful review (``words are cheaper than cash'', was my comment).
Hope you are doing well.
* Although it compiles, the SoundBlaster driver is less than functional;
cat foo.au > /dev/audio just hangs there. Works fine under UP on the
same platform.
* The fxp driver seems to not get interrupts at all. Everything times out
eventually and works like a very slow polled system. This happens IN
FRONT of the i960 bridge. The fpa (fddi) driver, the DPT driver all work
fine.
* If you put COM4 on irq 7 it is there, on irq 9 it is not found. A
conflict with the sb? The sb is mapped at 220. com4 is 2e8.
* Something strange. Booted SMP, started X11, xperfmon++ insisted that
libXaw was not there if ``shimon'' tried to tun it. Was there if root
ran it. Permissions? Nope. I re-ompiled and re-installed it. Now root
could see the executable (in /usr/X11R6/bin) but not ``shimon''.
Rebooted and both are fine. Never seen this one before.
* Interrupt latency is still not so hot. The typical DPT driver in UP
serves an interrupt in 3-55us. in SMP it takes 11-1000039us.
* I am getting an enormous number of spurious interrupts. In UP the
typical count is 0 aborted (due to errors) and 1 for spurious (int
routine was called but hardware said ``not me''. In SMP, the numbrs are
0 and 62090. The 1 spurious is explainable ( a bug in transitioning
from polled mode to interrupt mode during boot.
If there is anything I can do to help, let me know. I have sendero-ppp now
run smp. I have another machine I will setup tomorrow (new Brass) which
will be the same hardware.
Simon
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