Inscrutable CI jobs (avocado & Travis s390 check-tcg)

[Stefan Hajnoczi]

QEMU's avocado and Travis s390x check-tcg CI jobs fail often and I don't
know why. I think it's due to timeouts but maybe there is something
buried in the logs that I missed.

I waste time skimming through logs when merging qemu.git pull requests
and electricity is wasted on tests that don't produce useful pass/fail
output.

Here are two recent examples:
https://gitlab.com/qemu-project/qemu/-/jobs/3070754718
https://app.travis-ci.com/gitlab/qemu-project/qemu/jobs/583629583

If there are real test failures then the test output needs to be
improved so people can identify failures.

If the tests are timing out then they need to be split up and/or reduced
in duration. BTW, if it's a timeout, why are we using an internal
timeout instead of letting CI mark the job as timed out?

Any other ideas for improving these CI jobs?

Thanks,
Stefan

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