<div dir="ltr">The failure just happened to me again: <a href="http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1635/steps/ninja%20check%201/logs/FAIL%3A%20Clang%20Tools%3A%3Amerge.test">http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1635/steps/ninja%20check%201/logs/FAIL%3A%20Clang%20Tools%3A%3Amerge.test</a><div><br></div><div>:(</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Jul 2, 2016 at 12:16 PM, Sean Silva <span dir="ltr"><<a href="mailto:chisophugis@gmail.com" target="_blank">chisophugis@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span class="">On Sat, Jul 2, 2016 at 8:29 AM, Benjamin Kramer <span dir="ltr"><<a href="mailto:benny.kra@gmail.com" target="_blank">benny.kra@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Since the test case relies on the ThreadPool class this is probably<br>
related to <a href="https://llvm.org/bugs/show_bug.cgi?id=25829" rel="noreferrer" target="_blank">https://llvm.org/bugs/show_bug.cgi?id=25829</a>. We could<br>
disable that test on ppc but it would be much nicer if we could figure<br>
out why the ThreadPool doesn't work reliably on PPC. I couldn't get<br>
this to reproduce on a ppc64 machine :(<br></blockquote><div><br></div></span><div>Ouch! Thanks for digging in though.</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>-- Sean Silva</div></font></span><div><div class="h5"><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div><br>
On Wed, Jun 29, 2016 at 11:03 PM, Bill Seurer <<a href="mailto:seurer@linux.vnet.ibm.com" target="_blank">seurer@linux.vnet.ibm.com</a>> wrote:<br>
> I looked at this a bit a while back when you first asked but I didn't see<br>
> anything obviously wrong.<br>
><br>
> Benjamin, at least one of the referenced failures was on BE powerpc64. I<br>
> don't remember if that one<br>
> (<a href="http://lab.llvm.org:8011/builders/clang-ppc64be-linux-lnt/builds/4883" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/clang-ppc64be-linux-lnt/builds/4883</a>)<br>
> failed on stage 1 or 2 and the results pages are no longer available.<br>
><br>
> BTW, I tried testing the same revision many times on the same machine and<br>
> other BE and LE powerpc machines and never saw this.<br>
><br>
> On 06/28/16 21:42, Sean Silva wrote:<br>
>><br>
>> This just failed again:<br>
>><br>
>> <a href="http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1579" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1579</a><br>
>><br>
>> Bill, could you take a look at this? This is like the 3rd time I've been<br>
>> incorrectly pinged by this buildbot due to this issue.<br>
>><br>
>> -- Sean Silva<br>
>><br>
>> On Mon, Jun 13, 2016 at 8:07 PM, Sean Silva <<a href="mailto:chisophugis@gmail.com" target="_blank">chisophugis@gmail.com</a><br>
>> <mailto:<a href="mailto:chisophugis@gmail.com" target="_blank">chisophugis@gmail.com</a>>> wrote:<br>
>><br>
>> Thanks for taking a look. The flaky ASan test failure in the OP was<br>
>> stage1 so it sounds like there may be multiple problems :(<br>
>><br>
>><br>
>> -- Sean Silva<br>
>><br>
>> On Sun, Jun 12, 2016 at 7:32 AM, Benjamin Kramer<br>
>> <<a href="mailto:benny.kra@gmail.com" target="_blank">benny.kra@gmail.com</a> <mailto:<a href="mailto:benny.kra@gmail.com" target="_blank">benny.kra@gmail.com</a>>> wrote:<br>
>><br>
>> I threw all the sanitizers I had access to on this test and didn't<br>
>> find anything. The merging uses threads so I can't rule out<br>
>> nondeterminism. It's strange that it only happens on ppc64le and<br>
>> only<br>
>> on stage 2, so an actual miscompile wouldn't surprise me either.<br>
>><br>
>> On Sun, Jun 12, 2016 at 4:26 PM, Sean Silva<br>
>> <<a href="mailto:chisophugis@gmail.com" target="_blank">chisophugis@gmail.com</a> <mailto:<a href="mailto:chisophugis@gmail.com" target="_blank">chisophugis@gmail.com</a>>> wrote:<br>
>> > Also, `Clang Tools :: include-fixer/merge.test` seems to be a<br>
>> bit flaky:<br>
>> ><br>
>> ><br>
>><br>
>> <a href="http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1304" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1304</a><br>
>> ><br>
>><br>
>> <a href="http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1315" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage/builds/1315</a><br>
>> ><br>
>> > Ben, it looks like you're the one that added that test. Is<br>
>> there any chance<br>
>> > it could be a nondeterminism or something in the code?<br>
>> ><br>
>> > -- Sean Silva<br>
>> ><br>
>> > On Sun, Jun 12, 2016 at 1:41 AM, Sean Silva<br>
>> <<a href="mailto:chisophugis@gmail.com" target="_blank">chisophugis@gmail.com</a> <mailto:<a href="mailto:chisophugis@gmail.com" target="_blank">chisophugis@gmail.com</a>>> wrote:<br>
>> >><br>
>> >> Hi Bill, just a heads up but this bot seems to have<br>
>> spuriously failed on a<br>
>> >> build that only pulled in my commit r272505 which is<br>
>> unrelated.<br>
>> >><br>
>> >><br>
>><br>
>> <a href="http://lab.llvm.org:8011/builders/clang-ppc64be-linux-lnt/builds/4883" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/clang-ppc64be-linux-lnt/builds/4883</a><br>
>> >><br>
>> >> -- Sean Silva<br>
>> ><br>
>> ><br>
>><br>
>><br>
>><br>
><br>
><br>
> --<br>
><br>
> -Bill Seurer<br>
><br>
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