epoll

[AlexDaniel]

Module epoll cannot be installed (AlwaysFail), perhaps it has some failing tests.

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Output:

===> Searching for: epoll
===> Found: epoll:ver<0.2> [via Zef::Repository::Ecosystems<cpan>]
===> Fetching [OK]: epoll:ver<0.2> to /home/alex/Blin/data/zef-data/tmp/1549582494.2026.7922/epoll-0.2.tar.gz
===> Extraction [OK]: epoll to /home/alex/Blin/data/zef-data/store/epoll-0.2.tar.gz
===> Testing: epoll:ver<0.2>
t/00-meta.t ...... ok
# Failed test 'No events'
# at t/01-simple.t line 36
# expected: ''
#      got: 'epoll-event<140219946315344>'
# Looks like you failed 1 test of 6
t/01-simple.t .... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/6 subtests 
t/02-multiple.t .. ok

Test Summary Report
-------------------
t/01-simple.t  (Wstat: 256 Tests: 6 Failed: 1)
  Failed test:  6
  Non-zero exit status: 1
Files=3, Tests=17,  9 wallclock secs ( 0.04 usr  0.00 sys +  7.07 cusr  0.36 csys =  7.47 CPU)
Result: FAIL
===> Testing [FAIL]: epoll:ver<0.2>
Failed to get passing tests, but continuing with --force-test
===> Installing: epoll:ver<0.2>
===> Install [OK] for epoll:ver<0.2>

Ping @CurtTilmes

[JJ]

Maybe it's a Flapper? Again, works for me...

[AlexDaniel]

Yeah, it is. I reported it here but it is ignored: https://github.com/CurtTilmes/perl6-epoll/issues/2#issuecomment-461911699

[CurtTilmes]

Never mind. The previous report was for a different test. I'll mark even the simple test as extended so it won't get run during install. It isn't a problem with the module, just the test -- it is trying to set up multiple threads to communicate within a single process. It works fine monitoring external processes -- just need a more complicated test scheme.

[CurtTilmes]

This is a different issue from the old one (https://github.com/CurtTilmes/perl6-epoll/issues/2 t/02-multiple.t is flapping). That test was more complicated, and could occasionally fail. After the last report I marked that test as extended, and indeed it didn't fail this time. The previous report was not ignored.

This report is that even the 01-simple.t is failing? I've never seen that fail before in any runs. It starts up a single process, sends a single string, sees the event, does a slurp(:close) to make sure there are no more events coming on the process, then verifies that there are no events reported. If it is reporting the process as readable after the slurp(:close) something is really wrong, not just a bad test. It is difficult for me to debug because it always does the right thing on my host and on travis. I'll have to get more details on the system, os, rakudo, etc. to try to replicate.

[AlexDaniel]

@CurtTilmes it's a 24 core google compute instance running with 100% CPU utilization.