[JIRA] (OVIRT-919) Fwd: CI slaves extremely slow - overloaded slaves?

[Barak Korren (oVirt JIRA)]

Barak Korren created OVIRT-919:
----------------------------------

             Summary: Fwd: CI slaves extremely slow - overloaded slaves?
                 Key: OVIRT-919
                 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-919
             Project: oVirt - virtualization made easy
          Issue Type: By-EMAIL
            Reporter: Barak Korren
            Assignee: infra


More discussion and tracking needed, moving to Jira (please put any
further discussion there)

---------- Forwarded message ----------
From: Nir Soffer <nsoffer at redhat.com>
Date: 7 December 2016 at 21:33
Subject: CI slaves extremely slow - overloaded slaves?
To: infra <infra at ovirt.org>, Eyal Edri <eedri at redhat.com>, Dan
Kenigsberg <danken at redhat.com>


Hi all,

In the last weeks we see more and more test failures due to timeouts in the CI.

For example:

17:19:49 ======================================================================
17:19:49 FAIL: test_scale (storage_filesd_test.GetAllVolumesTests)
17:19:49 ----------------------------------------------------------------------
17:19:49 Traceback (most recent call last):
17:19:49   File
"/home/jenkins/workspace/vdsm_master_check-patch-fc24-x86_64/vdsm/tests/storage_filesd_test.py",
line 165, in test_scale
17:19:49     self.assertTrue(elapsed < 1.0, "Elapsed time: %f seconds"
% elapsed)
17:19:49 AssertionError: Elapsed time: 1.105877 seconds
17:19:49 -------------------- >> begin captured stdout << ---------------------
17:19:49 1.105877 seconds

This test runs in 0.048 seconds on my laptop:

$ ./run_tests_local.sh storage_filesd_test.py -s
nose.config: INFO: Ignoring files matching ['^\\.', '^_', '^setup\\.py$']
storage_filesd_test.GetAllVolumesTests
    test_no_templates                                           OK
    test_no_volumes                                             OK
    test_scale                                                  0.047932 seconds
OK
    test_with_template                                          OK

----------------------------------------------------------------------
Ran 4 tests in 0.189s

It seems that we are overloading the CI slaves. We should not use nested kvm
for the CI, such vms are much slower then regular vms, and we probably run
too many vms per cpu.

We can disable such tests in the CI, but we do want to know when there is
a regression in this code. Before it was fixed, the same test took 9 seconds
on my laptop. We need fast machines in the CI for this.

Nir
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-- 
Barak Korren
bkorren at redhat.com
RHCE, RHCi, RHV-DevOps Team
https://ifireball.wordpress.com/



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