[zorg] r300573 - Remove the ppc64le-clang-lnt buildbot because it continues to be flaky making it hard to listen to/use buildbots effectively due to the noise.

[Matthias Braun via llvm-commits]

Note that part of the problem here is fixing the underlying problem, the other part is finding ways to avoid mail notification to everyone else once the problem is known.

Usually I would say that you should file a PR against powerpc and/or tsan and mark the tests as "UNSUPPORTED: powerpc" in lit. The last part however doesn't seem to work given that these are written as googletests/unittests. Maybe someone on the tsan/powerpc side wants to edit CMakeLists instead to skip these or all tsan tests on powerpc? (+CC tsan unittest authors)

- Matthias

> On Apr 25, 2017, at 2:10 PM, Bill Seurer via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> On 04/19/2017 09:23 AM, David Blaikie wrote:
>> On Wed, Apr 19, 2017 at 6:24 AM Bill Seurer <seurer at linux.vnet.ibm.com
>> <mailto:seurer at linux.vnet.ibm.com>> wrote:
>> 
>>    I had previously spent a good chunk of time tracing
>>    back to the source of other thread-related problems and can adapt the
>>    scripts I used then to investigate whatever you were seeing.  I suspect
>>    this might be the same problem as I don't think the previous issues
>>    were ever fixed.
>> 
>> 
>> Likely was never fixed, by the sounds of it.
> 
> I ran 10,000 test iterations on the (then current) revision and found the following tests were problematic:
> 
> 
> FAIL: ThreadSanitizer-powerpc64le :: ignore_lib1.cc
> 
> This one fails with some regularity, 48 times in 10,000 runs.
> 
> 
> FAIL: ThreadSanitizer-powerpc64le :: ignore_lib5.cc
> 
> Failed 15 times in 10,000 runs.
> 
> 
> FAIL: AddressSanitizer-powerpc64le-linux :: TestCases/Posix/current_allocated_bytes.cc
> 
> Failed 4 times in 10,000 runs
> 
> 
> TestCases/Posix/current_allocated_bytes.cc
> 
> Failed once in 10,000 runs.
> 
> 
> I looked back at my notes and the previous problem revision for threads was r279664.  I don't know if that is the case for these.
> -- 
> 
> -Bill Seurer
> 
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