To: None <macbsd-general@NetBSD.ORG>
From: John E. Clark <firstname.lastname@example.org>
Date: 10/27/1994 20:03:07
Today I attempted to a variety of truely simple things.
Namely, copy in all of the source distribution.
I was prevented from happily completing this task by
In several cases the DB ps and callout commands had
the following (abreviated since I didn't have a way
to record all of the text output).
1 1 _roundrobin
2 1 _pffasttimeout
20 18 _pfslowtimeout
49 29 _schedcpu
40 0 _if_slowtimeout
d0 -- _acct_process
The rest of the registers looked like 'unintersting' stuff.
At the moment can't judge what is useful or not.
I don't know if the fact that I'm using a Mac II, which is
'slow' is part of the reason I see this crash so fequently
An alternate idea is that I have a noisy SCSI cable and I'm
either getting a SCSI parity error and the driver isn't doing
the right thing, or is doing a retry, but doesn't do the
right thing on the biodone bit.
Alternatively, the slowness could affect how fast I can get
to an interupt, say the ADB interupt, or while doing SCSI
stuff the ADB stuff affects the situation.
However, in most of the failures I was not 'using' ADB, all
that was happening was that the screen was 'scrolling'.
I did see the failure when I had no screen output, so I'm
not at all convinced that it is something dealing with
ADB/Screen operations, unless it's like vertical blank level.