llvm dev - Mar 2015 - [LLVMdev] Cortex-A9 bot unstable in Clang

Hi Galina, folks,

Does anyone have an idea why the A9 bots are unstable on Clang? They
all seem to be the same problem:

1. <eof> parser at end of file
Segmentation fault

http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/26073/steps/check-all/logs/Clang%3A%3Adead-stores.c

http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/26068/steps/check-all/logs/Clang%3A%3ACFDateGC.m

http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/26068/steps/check-all/logs/Clang%3A%3Ainline.cpp

This happens on more than one buildslave, so I don't think it's a
board related problem, but some instability either on the system
(libraries, tools?) or specific to A9. This behaviour seems to be
pretty consistent over the last several few months to be coincidence.

cheers,
--renato

Renato Golin <renato.golin at linaro.org> writes:
> Does anyone have an idea why the A9 bots are unstable on Clang? They
> all seem to be the same problem:
>
> 1. <eof> parser at end of file
> Segmentation fault
Could it be something as simple as running out of memory (or some other
resource) and getting killed by the host OS? That kind of thing tends to
look something like this.
>
http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/26073/steps/check-all/logs/Clang%3A%3Adead-stores.c
>
>
http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/26068/steps/check-all/logs/Clang%3A%3ACFDateGC.m
>
>
http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/26068/steps/check-all/logs/Clang%3A%3Ainline.cpp
>
> This happens on more than one buildslave, so I don't think it's a
> board related problem, but some instability either on the system
> (libraries, tools?) or specific to A9. This behaviour seems to be
> pretty consistent over the last several few months to be coincidence.
>
> cheers,
> --renato

On 12 March 2015 at 02:47, Justin Bogner <mail at justinbogner.com>
wrote:
> Could it be something as simple as running out of memory (or some other
> resource) and getting killed by the host OS? That kind of thing tends to
> look something like this.
Hi Justin,

Yes, that could be it. Panda boards have 1GB of RAM, and Clang objects
are getting big.

Galina, do you have some kind of swap on that board? I know swapping
on USB is not great, but at least it stops the bot from dying every
few builds.

cheers,
--renato