[LLVMdev] Assuring ARM code quality in LLVM

[Galina Kistanova]

Correction; Should be:

> The issue with cross compilation is that tests do support well the cross scenario.

Tests DO NOT support well the cross

Thanks

Galina




On Mon, Apr 11, 2011 at 1:24 PM, Galina Kistanova <gkistanova at gmail.com> wrote:
> Hi Renato,
>
>>I was recently investigating the build bot infrastructure and noticed
>>that the arm-linux target is failing for quite a long time. I believe
>>that it means ARM code is not executed all that often in LLVM tests,
>>is that correct?
>
>>We were wondering what kind of support we could give to make sure ARM
>>code is correct and don't regress, specially before releases (I know
>>it's a bit late for 2.9).
>
>>We have thought about some routes:
>> - Install some build slaves on our side, so you can test them (linux,
>>bare-metal), if it's possible to cross-compile on build slaves.
>
> It is possible.
> We host several build slaves which cross compile. The issue with cross
> compilation is that tests do support well the cross scenario. We are
> working on this but it moves slower then we wish it would be.
>
>
>>>From what you've listed, we only have v5T and one cortex A8. We could
>>provide more A8/A9s, M3s (mBed) boards and also models of all
>>variations possible.
>
>>Does it make any difference running them here at ARM or locally on
>>OSUOSL? We could easily help them get more boards, too...
>
> Llvm lab seems is the right place to put them, so people could get an
> access to boards for debugging.
>
> As a general note, my observations shows that slow builds gets less
> attention from the community then fast ones.
> This could be an issue with small boards.
> I have been tried native builds on a beagleboard, it took about 4
> hours to build without the tests which is a bit too slow.
> We will need to find a way to make ARM builds faster.
>
> Thanks
>
> Galina
>
>
>
>
> On Fri, Apr 8, 2011 at 5:46 AM, Renato Golin <renato.golin at arm.com> wrote:
>> On 8 April 2011 11:21, Xerxes Rånby <xerxes at zafena.se> wrote:
>>> Hope this will help fix the regressions
>>
>> Hi Xerxes,
>>
>> I see you're the owner of that board, thanks for the detailed
>> description of the tests.
>>
>> By what you say, I think that the board itself is serving its purpose,
>> and 2.9 only got that regression because it wasn't fixed it in time.
>>
>> My intention was to know what can we (ARM) can do to help LLVM repeat
>> your success on all tests (clang, llvm, llvm-gcc, dragonegg), at least
>> before each release. How can we make ARM a first-class target, in
>> which a regression such as the one you found is a blocker to release.
>>
>>
>> Duncan,
>>
>> I'm not sure me connecting to those boards will help much, since I
>> know very little of the build-bot infrastructure. However, I'd be
>> happy to help setting them up to run the tests we need (with some help
>> in the beginning).
>>
>> >From what you've listed, we only have v5T and one cortex A8. We could
>> provide more A8/A9s, M3s (mBed) boards and also models of all
>> variations possible.
>>
>> Does it make any difference running them here at ARM or locally on
>> OSUOSL? We could easily help them get more boards, too...
>>
>>
>> On a different topic,
>>
>> >From what I understood, this tests run completely on the target
>> (compilation of LLVM, unit tests, etc). So, for bare-metal tests that
>> wouldn't work. We'd need to have a staging server that would compile
>> to all platforms and run the tests (maybe just a subset) in the
>> hardware via USB (mBeds) or JTAG on most other boards, or even better,
>> on models directly.
>>
>> Do you think this is doable with the build bot infrastructure?
>>
>> cheers,
>> --renato
>>
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>