Re: [opensuse]  [OT] unstable system - still trying to identify the culprit. (update) On Tuesday 04 March 2008 06:41:28 am Per Jessen wrote:
> I'm starting a new thread as new results have significantly changed the
> situation.
>
> > You will undoubtedly remember the discussion about the stability
> > problems on my new workstation from a couple of weeks ago.  I'll
> > quickly sum up -
> >
> > 1. Gigabyte motherboard, quite new model.
> > 2. AMD Phenom quad-core CPU. 2.2GHz
> > 3. 4Gb memory
> > 4. Software RAID1 on SATA disks.
> > 5. ATI Radeon X1650.
> > 6. 850W powersupply.
> >
> > When I subject the system to stress testing (mprime), it will
> > automatically reboot after a fairly short time.
>
> I asked on the mersenne prime mailing list (where a lot of people use
> mprime) if anyone had anything to add.  George Woltman (mprime author)
> suggested running the "small FFT test" which would not use a lot of
> memory.  He obviously had a memory problem in mind.
>
> Well, VERY interesting results.  The machine has now been running for
> almost an hour with 4 mprime instances/threads.  It's already passed
> the first few selftests.
> When I started it, CPU temperature rose almost immediately to 63-64C,
> then seemed to settle at 66C for a while.  It hit 67C, but has now
> settled back down to 60C.
>
> So where does that leave me?  Is it a memory or memory controller
> problem that memtest86+ fails to spot?
>
>
> /Per Jessen, ZÃ¼rich

Now you have conflicting indicators on ram issues. It could still be either a 
software or a hardware issue. In this thread there have been suggestions 
about installing windoze and running mprime in windoze. It seems that the 
time has come to swallow hard, take a deep breath and temporarily submit to 
the unmentionable. It is possible that mem86 is right and you are the first 
to encounter an important os weakness on memory access or a hardware erron in 
multi-cpu chips... if so, the relevant gurus will require input... 
good luck,
d.



