[Lldb-commits] Buildbot numbers for week of 11/22/2015 - 11/28/2015

Tobias Grosser via lldb-commits lldb-commits at lists.llvm.org
Mon Nov 30 23:02:02 PST 2015

On 12/01/2015 02:05 AM, David Blaikie wrote:
> On Mon, Nov 30, 2015 at 5:00 PM, Galina Kistanova <gkistanova at gmail.com
> <mailto:gkistanova at gmail.com>> wrote:
>     Hi David,
>     Thank you for the useful suggestions, I will work on these.
>     >I guess the entries with no entry in the failed column have zero failures?
>     Yes.
>           perf-x86_64-penryn-O3-polly-before-vectorizer
>     |         31 |         31 |
>           perf-x86_64-penryn-O3-polly-before-vectorizer-detect-only
>     |         31 |         27 | 05:28:12
>     These /\ two builders failed most of the time, but they also only
>     ran a handful of times. I guess they're triggering off polly changes
>     only? I wonder if they should trigger off LLVM changes too, but I'm
>     not sure.
>     They build on llvm changes also, but they both build for quite a
>     long time. I think it's the reason why they do not build more.
> Ah, OK - so the other suggestions might help demonstrate/understand that
> behavior better.

These buildbots run performance tests, meaning they run the LNT test 
suite 10 times per run to get stable results. They are triggered on any 
LLVM/clang/Polly test but do not run more often just because we do not
have more hardware to run them more often. The relevant buildslave is 
constantly building something.

> Tobias - any idea why these builders are /quite/ so slow & whether they
> could be improved? With large blame lists that come from a small number
> of slaves on a slow builder task it makes them hard to action. Are they
> useful to you?

These bots do _not_ send out any emails, exactly for this reason. But 
yes, they are very useful to quickly get an idea of our current 
compile-time/run-time performance.

Thanks for you taking care of the buildbot noise. If my bots cause any 
issue for you, please let me know. Ensuring low noise is very important.


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