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

[eyal edri [Administrator] (oVirt JIRA)]

     [ https://ovirt-jira.atlassian.net/browse/OVIRT-919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

eyal edri [Administrator] reassigned OVIRT-919:
-----------------------------------------------

     Assignee: Evgheni Dereveanchin  (was: infra)
    Epic Link: OVIRT-403

> 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
>          Components: Jenkins
>            Reporter: Barak Korren
>            Assignee: Evgheni Dereveanchin
>              Labels: hypervisors, performance, slaves, standard-ci
>
> 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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