[mythtv-users] mythbackend crashes every 6-7 hours

[Greg Oliver]

On Sun, Oct 31, 2010 at 6:57 AM, Rob Verduijn <rob.verduijn at gmail.com> wrote:
> Hello,
>
> Hunting for very obscure ram memmory flaws sounds like a ghost chase to me.
> So I'll classify that one under gut feelings and assumptions and
> therefore won't waste time on it.
> (Even if I had any spare ram, which I don't)
>
> But the valgrind suggestion sounds like a more reasoning aproach to me.
> Do you have a link to a howto, because I'm not really familiar with valgrind.
> I will get on it as soon as I figure out what valgrind is and how to use it.

Here's a quick start.  You need to have the mythtv debug symbols
packages installed prior though.

http://valgrind.org/docs/manual/quick-start.html#quick-start.prepare

There were quite a few results returned with google "mythtv + valgrind" as well.

-Greg

> Rob Verduijn
>
> 2010/10/31 Paul Harrison <mythtv at sky.com>:
>> On 31/10/10 08:35, Rob Verduijn wrote:
>>> Hi there,
>>>
>>> I've spend some time awake when the folks we're sleeping.
>>> Ran the memory stress test and guess what.......ZERO!!! ERRORS
>>> Over one hour wasted.
>>>
>>> The physical ram is OK.
>>>
>>> I will perform no more hardware related tests that are based on
>>> assumptions or gut feelings.
>>>
>>> Sorry about that I get cranky when I do not get enough sleep.
>>>
>>> I'm not running trunk builds.
>>> I'm running packages from the packman repository.
>>> http://ftp.gwdg.de/pub/linux/misc/packman/suse/11.3
>>>
>>> Rob Verduijn
>>>
>>>
>>>
>>
>> Running a memory stress test for only one hour is unlikely to find the
>> fault, I've run stress tests for 24 hours with no errors but stress the
>> memory using a real world application like a large compile and it
>> randomly fails every time. Often the only way to be sure is to swap out
>> the memory sticks one by one until you find the faulty one.
>>
>> If you are sure your hardware is not faulty and the problem is due to a
>> leak then the best way to get it fixed is to run the backend under
>> valgrid under the same conditions that causes the problem and post the logs.
>>
>> Paul H.
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