[cfe-dev] [LLVMdev] LLVM IRC channel flooded?

Yaron Keren yaron.keren at gmail.com
Tue May 19 11:10:52 PDT 2015

+1 for hiding flaky bots. I routinely see some bot randomally failing after
a non-related commit.
sanitizer-x86_64-linux may be the worst one. This wastes time and hides
real problems.

2015-05-19 20:40 GMT+03:00 James Y Knight <jyknight at google.com>:

> Yes, I also find the amount of bot spam in #llvm is basically intolerable.
> It makes it difficult to see actual people talking. At first, I just put
> all the bots on /ignore. Now I have an xchat script to move the botspam to
> another tab (tabify-004.pl). I'd recommend that the bots should just be
> moved to #llvm-bots and fix the problem for everyone. Those who are
> committing changes can join that channel, too, and others don't care.
> While we're on this subject, I also find the official buildbot page (
> lab.llvm.org:8011) almost unusable, since so many columns are either
> always red, or else are so flaky that they basically randomly alternate
> between passing and failing. So, at a glance, it's impossible to tell
> whether the current state of the tree is good. (I certainly haven't
> memorized which ones are "supposed" to be red, and which are not. Maybe
> others have). Having flaky and always-failing builds show up on the
> buildbot pages, and notifying IRC, really has negative utility, since it
> not only is not providing useful information, but is serving to obscure the
> actual important failures, and causing people to spend time investigating
> non-problems.
> Someone gave me the hint to use the http://bb.pgr.jp/ buildbot page
> instead, which was a great recommendation -- that page shows problems much
> more clearly. But it's unfortunate that there *needs* to be a separate
> "sane builders only" buildmaster.
> E.g. (and not to pick on this particular bot, this is just one example of
> many):
> http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/27655 --
> passed, while the previous failed. But, it's not caused by the commit, it's
> just arbitrary.
> Or, yesterday, on #llvm: "Anyone want to give me a clue as to why this bot
> failed?
> http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/18017" --
> answer: because it's randomly broken. Wasted the questioner's time trying
> to investigate the failure.
> If all the flaky or always-broken builder configurations got hidden from
> the main pages of buildbot, and stopped sending emails/IRC notifications to
> anyone but their "owner", that would be a substantial improvement.
> On Tue, May 19, 2015 at 10:15 AM, Renato Golin <renato.golin at linaro.org>
> wrote:
>> Folks,
>> I know it's a reasonably valuable thing to have the buildbot IRC bot
>> publishing results, but the channel is kind of flooded with the
>> messages, and the more bots we put up, the worse it will be.
>> I think we still need the NOC warnings, but not over IRC. The Buildbot
>> NOC page is horrible and useless, since it doesn't know the difference
>> between "it's red and I know it" from "it's broken".
>> For that reason, I have built my own NOC page:
>> http://people.linaro.org/~renato.golin/llvm/arm-bots/
>> But that machine is too slow to cope with all bots. We may need a
>> project to build such a system on a larger scale.
>> However, for now, I think not printing the green results in IRC would
>> go a long way of cleaning the channel up.
>> Any thoughts?
>> cheers,
>> --renato
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