Re: [PATCH 03/10] tests/avocado/intel_iommu.py: increase timeout

[Cleber Rosa <crosa@redhat.com>]

Alex Bennée <alex.bennee@linaro.org> writes:

> Cleber Rosa <crosa@redhat.com> writes:
>
>> Based on many runs, the average run time for these 4 tests is around
>> 250 seconds, with 320 seconds being the ceiling.  In any way, the
>> default 120 seconds timeout is inappropriate in my experience.
>
> I would rather see these tests updated to fix:
>
>  - Don't use such an old Fedora 31 image

I remember proposing a bump in Fedora version used by default in
avocado_qemu.LinuxTest (which would propagate to tests such as
boot_linux.py and others), but that was not well accepted.  I can
definitely work on such a version bump again.

>  - Avoid updating image packages (when will RH stop serving them?)

IIUC the only reason for updating the packages is to test the network
from the guest, and could/should be done another way.

Eric, could you confirm this?

>  - The "test" is a fairly basic check of dmesg/sysfs output

Maybe the network is also an implicit check here.  Let's see what Eric
has to say.

>
> I think building a buildroot image with the tools pre-installed (with
> perhaps more testing) would be a better use of our limited test time.
>
> FWIW the runtime on my machine is:
>
> ➜  env QEMU_TEST_FLAKY_TESTS=1 ./pyvenv/bin/avocado run ./tests/avocado/intel_iommu.py
> JOB ID     : 5c582ccf274f3aee279c2208f969a7af8ceb9943
> JOB LOG    : /home/alex/avocado/job-results/job-2023-12-11T16.53-5c582cc/job.log
>  (1/4) ./tests/avocado/intel_iommu.py:IntelIOMMU.test_intel_iommu: PASS (44.21 s)
>  (2/4) ./tests/avocado/intel_iommu.py:IntelIOMMU.test_intel_iommu_strict: PASS (78.60 s)
>  (3/4) ./tests/avocado/intel_iommu.py:IntelIOMMU.test_intel_iommu_strict_cm: PASS (65.57 s)
>  (4/4) ./tests/avocado/intel_iommu.py:IntelIOMMU.test_intel_iommu_pt: PASS (66.63 s)
> RESULTS    : PASS 4 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0
> JOB TIME   : 255.43 s
>

Yes, I've also seen similar runtimes in other environments... so it
looks like it depends a lot on the "dnf -y install numactl-devel".  If
that can be removed, the tests would have much more predictable runtimes.