RE: [Xen-devel] wget and Zope crashes on post-2.0.6 -testing

[Osma Suominen <osma.suominen@xxxxxxxxxxxx>]

On Thu, 2 Jun 2005, Ian Pratt wrote:

> I can't reproduce this wget crash, even running seti@home in the
> background as you suggest.
> I'm running this in dom0 on an SMP Xeon box.
>
> Are you running NTP on your system? If so, what does "echo peers | ntpq"
> show? What happens if you disable it?
>
> Is there anything odd about the system? Is the CPU clock speed correctly
> identified?
Unfortunately the machine is not completely in my control. It is owned by 
another company and I only have access to dom1 and dom2, not dom0 (no 
other domains on the machine). But I will try to reproduce this on another 
machine. It might be a lot easier if there was a 2.0.6 demo CD, though...
It was easy to cause this crash with the 2.0.5 demo CD. I succeeded on all 
3 machines (most of them old) I tried it on. The recipe was in a previous 
post to the list. But maybe Xen has changed so much that it's not relevant 
anymore.
Anyway, the machine I'm now observing is a Pentium IV server with 
HyperThreading. ntpd is running in dom0. As far as I can tell the clock 
speed (3.0GHz) is correctly reported. There are two identical machines, 
and the problem occurs on both (and in both dom1 and dom2), so broken 
hardware is likely not to blame.
AFAICT there is nothing odd with these machines; in fact the company 
owning them seems to make a good business out of renting out Xen domains 
to customers like me. However, since others aren't complaining loudly, the 
problem could be something related to the specific workload I'm putting on 
the machines.
> You could try the unstable tree -- it would certainly be interesting to
> know if there was a difference. The issue must be really quite specific
> to your machine or setup (e.g. the crystal is completely knackered) as
> otherwise lots of people would be complaining.
As I said the specific machine is not entirely in my control but I have 
the feeling I might be able to reproduce this on a spare machine, since it 
was so easy with 2.0.5. In that case I will try unstable as well.
Anyway, thanks for your input. I will look at whether NTP is involved and 
do some further investigation.
-Osma

--
*** Osma Suominen / MB Concert Ky *** osma.suominen@xxxxxxxxxxxx ***

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