[LLVMdev] Debugging on unavailable hardware

[Serge Pavlov]

Hi Renato,

Thank you very much for the directions, I am going to recommit my fix.

What are hardware used in buildbots? Are these common boards like
PandaBoard or some thing special? What is RAM installed?

Thanks,
--Serge

2014-12-11 2:36 GMT+06:00 Renato Golin <renato.golin at linaro.org>:

> On 10 December 2014 at 19:06, Serge Pavlov <sepavloff at gmail.com> wrote:
> > In revision 223114 I committed a fix to clang project. It caused fail on
> > clang-native-arm-cortex-a9:
> >
> http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/23599.
> > According to logs it was a problem with memory allocated by malloc.
> > Reverting the fix in 223120 made the bot green. The changed code does
> > nothing with heap, none of other bots failed, so it looks like a platform
> > specific problem.
>
> Hi Serge,
>
> We're seeing this behaviour, too, and on unrelated commits. We're
> working to make that bot more stable.
>
> That same commit passed on another ARM bot:
>
> http://lab.llvm.org:8011/builders/clang-cmake-armv7-a15/builds/2123
>
> which means that it probably had nothing to do with your commit, but
> the bot's instability. I suggest that, for the time being, if you see
> a failure in one ARM bot, check the others to make sure the problem
> can be reproduced across the board.
>
> If all fail, revert your patch and we'll try to debug. If only one
> fail but not the other, wait until the next build finishes. If the
> build is still broken the same way, revert. If not, ignore.
>
>
> > Could somebody advice how I can investigate the problem? I don't have
> > appropriate hardware and  running tests in emulated environment does not
> > shows any problem, all tests pass.
>
> If the problem persists and you need to debug the problem, let me know
> and I could give you temporary access to an ARM board, or even run
> that for you.
>
> Alternatively, there is a new cloud service that I'm testing
> (https://cloud.online.net/) that provides remote *real* ARM boards for
> testing. They have a 15 minute trial that you could run some examples
> and retrieve the logs.
>
> cheers,
> --renato
>
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