[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.

[Bill Seurer via llvm-commits]

On 04/25/2017 04:27 PM, David Blaikie wrote:
>
>
> On Tue, Apr 25, 2017 at 2:11 PM Bill Seurer <seurer at linux.vnet.ibm.com
> <mailto:seurer at linux.vnet.ibm.com>> 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>
>     > <mailto: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
>
>
> Thanks!
>
>
>     and found
>     the following tests were problematic:
>
>
>
>     FAIL: ThreadSanitizer-powerpc64le :: ignore_lib1.cc
>
>
> I believe this is the one that failed the particular run that I disabled
> it on.
>
>
>     This one fails with some regularity, 48 times in 10,000 runs.
>
>
> I'm surprised it's that low - discussions on IRC seemed to indicate
> (with far less data/rigor, to be totally fair) more in the ballpark of
> 1/10, but it's good to know it's... somewhat reproducible.

It's kinda random.  There were streaks during the run were it failed 
several times in a row and then not for a thousand runs.

-- 

-Bill Seurer