Re: s390 private runner CI job timing out

[Christian Borntraeger <borntraeger@linux.ibm.com>]

Am 06.04.23 um 14:39 schrieb Peter Maydell:
> On Thu, 6 Apr 2023 at 13:30, Thomas Huth <thuth@redhat.com> wrote:
>> The thing is: it shouldn't take that long to build QEMU and run the tests
>> here, theoretically. Some days ago, the job was finishing in 39 minutes:
>>
>>    https://gitlab.com/qemu-project/qemu/-/jobs/3973481571
>>
>> The recent run took 74 minutes:
>>
>>    https://gitlab.com/qemu-project/qemu/-/jobs/4066136770
>>
>> That's almost a factor of two! So there is definitely something strange
>> going on.
> 
> So that 39 minute run was about 22 minutes compile, 17 minutes test.
> The 74 minute run was 45 minutes compile, 30 minutes test.
> The number of compile steps in meson was pretty much the same
> (10379 vs 10384) in each case. So the most plausible conclusion
> seems like "the VM mysteriously got slower by nearly a factor of 2",
> given that the slowdown seems to affect the compile and test
> stages about equally.
> 
> The VM has been up for 44 days, so we can rule out "rebooted into
> a new kernel with some kind of perf bug".

I will ask around if we can get a higher share of the system.