Re: [PATCH 6/9] gitlab-ci: Split gprof-gcov job

["Alex Bennée" <alex.bennee@linaro.org>]

Thomas Huth <thuth@redhat.com> writes:

> On 25/05/2021 12.21, Philippe Mathieu-Daudé wrote:
>> On 5/25/21 10:25 AM, Philippe Mathieu-Daudé wrote:
>>> This job is hitting the 70min limit, so split it in 2 tasks.
>>>
>>> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
>>> ---
>>>   .gitlab-ci.d/buildtest.yml | 17 ++++++++++++++---
>>>   1 file changed, 14 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/.gitlab-ci.d/buildtest.yml b/.gitlab-ci.d/buildtest.yml
>>> index f903fdea3f4..894732e203d 100644
>>> --- a/.gitlab-ci.d/buildtest.yml
>>> +++ b/.gitlab-ci.d/buildtest.yml
>>> @@ -564,16 +564,27 @@ check-deprecated:
>>>     allow_failure: true
>>>     # gprof/gcov are GCC features
>>> -gprof-gcov:
>>> +build-gprof-gcov:
>>>     extends: .native_build_job_template
>>>     needs:
>>>       job: amd64-ubuntu2004-container
>>>     variables:
>>>       IMAGE: ubuntu2004
>>>       CONFIGURE_ARGS: --enable-gprof --enable-gcov
>>> -    MAKE_CHECK_ARGS: check
>>>       TARGETS: aarch64-softmmu ppc64-softmmu s390x-softmmu x86_64-softmmu
>>> -  timeout: 70m
>>> +  artifacts:
>>> +    expire_in: 1 days
>>> +    paths:
>>> +      - build
>> FYI this job takes 28min:
>> https://gitlab.com/philmd/qemu/-/jobs/1290778672
>> 
>>> +
>>> +check-gprof-gcov:
>>> +  extends: .native_test_job_template
>>> +  needs:
>>> +    - job: build-gprof-gcov
>>> +      artifacts: true
>>> +  variables:
>>> +    IMAGE: ubuntu2004
>>> +    MAKE_CHECK_ARGS: check
>>>     after_script:
>>>       - ${CI_PROJECT_DIR}/scripts/ci/coverage-summary.sh
>> and this one 23min:
>> https://gitlab.com/philmd/qemu/-/jobs/1290778751
>
> So why are they taking less than 70 minutes when split in two parts,
> but are exceeding  the 70 minutes when done in one job?
> That does not make sense...

The time just seems to be highly variable. Normally I see succeeding
runs take ~40 minutes. I suspect there is some aspect of the profiling
code that interacts poorly under load leading to much longer runtimes.

-- 
Alex Bennée