Re: s390 private runner CI job timing out

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

Am 06.04.23 um 14:05 schrieb Peter Maydell:
> On Thu, 6 Apr 2023 at 12:17, Christian Borntraeger
> <borntraeger@linux.ibm.com> wrote:
>>
>> Am 06.04.23 um 12:44 schrieb Peter Maydell:
>>> On Thu, 6 Apr 2023 at 11:40, Christian Borntraeger
>>> <borntraeger@linux.ibm.com> wrote:
>>>> Am 06.04.23 um 11:21 schrieb Peter Maydell:
>>>>> Christian, does our S390X machine get a guaranteed amount of CPU,
>>>>> or does it depend on what else is running on the hardware?
>>>>
>>>> I think its a shared system with shared CPUs. Can you check the steal
>>>> time in top or proc? If this is far too high we could ask to give you
>>>> more weight for that VM.
>>>
>>> It's idle at the moment and steal time seems to be low (0.0 .. 0.3);
>>> I'll try to remember to check next time it's running a job.
>>>
>>
>> Do you have /proc/stat ?
> 
> Yes; hopefully it means more to you than it does to me :-)
> 
> linux1@qemu01:~$ cat /proc/stat
> cpu  60904459 604975 15052194 1435958176 17128179 351949 758578 22218760 0 0
> cpu0 15022535 146734 3786909 358774818 4283172 98313 237156 5894809 0 0
> cpu1 15306890 151164 3746024 358968957 4378864 85629 172492 5434255 0 0
> cpu2 15307709 157180 3762691 359141276 4138714 85736 176367 5474594 0 0
> cpu3 15267324 149895 3756569 359073124 4327428 82269 172562 5415101 0 0

This is
user,nice,system,idle,iowait,irq,softirq,steal,guest,guest_nice
So overall there is some (20-30% since the last reboot) steal going on.
Not sure if this is the real problem since it is only Ubuntu 20.04.
Does a higher timeout make the problem go away?