[yocto] Can Yocto build to set up process running priority in service?

[JH]

I just found a blog:
http://bristot.me/setting-real-time-priorities-to-services-using-systemd/

Set following CPUSchedulingPriority, systemd does support priority
setting, right? Or that just bogus.

[Service]
ExecStart=/usr/sbin/mcelog --ignorenodev --daemon --foreground
CPUSchedulingPolicy=fifo
CPUSchedulingPriority=20

Thank you.

- jh

On 8/23/19, ChenQi <Qi.Chen at windriver.com> wrote:
> On 08/23/2019 10:58 AM, JH wrote:
>> Thanks ChenQi, can the process priority be set in ExecStart= of the
>> xxx.service file?
>>
>> Thank you.
>>
>> Kind regards,
>>
>> - jh
>
> I didn't try it out. But I think the answer is likely to be 'No'.
>
> systemd does not like the old 'nice'. So there's no mechanism integrated
> in systemd.
> You can use more modern way of CPUWeight, which makes use cgroup
> mechanism. Check systemd.recource-control(5) for more info.
>
> Best Regards,
> Chen Qi
>
>> On 8/23/19, ChenQi <Qi.Chen at windriver.com> wrote:
>>> On 08/23/2019 05:32 AM, JH wrote:
>>>> I have two processes launched from a service unit, how can the Yocto
>>>> customer distro to set up high_priority_process?
>>>>
>>>> ExecStartPre=low_priority_priority
>>>> ExecStart=high_priroty_process
>>>>
>>>> Thank you.
>>>>
>>>> Kind regards,
>>>>
>>>> - jh
>>>>
>>>> On 8/22/19, JH <jupiter.hce at gmail.com> wrote:
>>>>> Hi,
>>>>>
>>>>> How to set up process running priority for services in Yocto build
>>>>> using renice or some method?
>>>>>
>>>>> Thank you.
>>>>>
>>>>> Kind regards,
>>>>>
>>>>> - jupiter
>>>>>
>>> Not sure about your exact needs. But as far as I know, nice value is
>>> inherited. You can just set it for the shell that starts a yocto build.
>>> If you are using some scripts, the same logic holds.
>>>
>>> Best Regards,
>>>
>>> Chen Qi
>>>
>>>
>
>