[TriLUG] Sun Ultra 5 freezes under load

[Jack Hill]

On Wed, 7 Dec 2011, Ron Kelley wrote:

> Check to see if the CPU fan is running and/or the machine is overheating.    It could also signal a power-supply "on its way out".

The CPU workload has been compiling large software packages (the kernel, 
gcc). I don't think this machine has a variable speed CPU fan, but I'll 
check on that.  I'm tempted to think it isn't a hardware problem since 
when I do the same jobs when booted from a live cd I experience no 
problems.

> What type of CPU workload are you doing?  Anything I/O intensive as well?

The only I/O intensive thing that it's done is a rebuild of a raid-1 
array.

Jack

>
> -----------------------------
> Ron Kelley
> rkelleyrtp at gmail.com
>
>
>
> On Dec 7, 2011, at 1:06 PM, Jack Hill wrote:
>
>> Hi all,
>>
>> This might be a long shot, but I'm not sure if the problem is specific to the exotic hardware.
>>
>> When the machine is under CPU load it will freeze (sending a break over the serial console won't even bring up the openboot prompt) after about an hour. The problem seems to be specific to the installation (i.e. not a hardware problem) because I don't see this when it's booted with the livecd. Also, it seems to be specific to CPU usage and not disk usage. I'm not seeing anything interesting in the logs (probably because it crashes before it can write anything).
>>
>> Suggestions on what is going on/what I might do to figure out what's going on?
>>
>> Jack
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