[Freeswitch-users] FS priority

[Bote Man]

Thanks for that. I was under the impression that systemd was throwing
FreeSWITCH into the generic scheduling group and starving it of resources
as a result, but when I manually ran ./freeswitch as root it still showed
the same values.

Running FS manually with -np yielded pri=20 nice=0 and System Monitor
reports priority "normal"

Running FS manually with -rp yielded pri=-2 nice=-10 and System Monitor
reports priority "very high", same results as when FS was started without
any priority switch on the command line.

BUT! When I start FS with systemd it maintains priority=-2 but nice all the
way down to 19 which is why System Monitor reports "very low". This happens
even with the -rp switch specified in the unit file.

I don't know how scheduling priority and nice level interact on Debian, but
it looks like I have a new research project for this weekend, assuming this
is truly something to be concerned about. Or is it?

Thanks for the tips. I will report my findings to the list if I discover
anything substantive.

Bote





On Fri, Sep 4, 2015 at 2:02 PM, Shaun Stokes <
shaun.stokes at itec-support.co.uk> wrote:

> Hi Bote,
>
> I believe priority works in a similar way to metric (i.e. lower comes
> first), so -20 (most favorable scheduling) to +19 (least favorable
> scheduling).
>
> -rp                    -- enable high(realtime) priority settings
> -lp                    -- enable low priority settings
> -np                    -- enable normal priority settings (system default)
>
> Source: https://wiki.freeswitch.org/wiki/Command_line
>
> Hope this helps.
>
> Thanks,
> Shaun
> ------------------------------
> *From:* freeswitch-users-bounces at lists.freeswitch.org [
> freeswitch-users-bounces at lists.freeswitch.org] on behalf of Bote Man [
> bote_radio at botecomm.com]
> *Sent:* 04 September 2015 15:54
> *To:* FreeSWITCH Users Help
> *Subject:* [Freeswitch-users] FS priority
>
> I’m trying to set the priority on a new FreeSWITCH installation built from
> master on Debian 8 running on bare metal. It is currently running at “very
> low” priority according to Resource Monitor in the GUI and ‘top’ reports FS
> is running at priority = -2 (that’s negative two) and nice = 19
>
>
>
> So with the way FreeSWITCH is now launched by systemd is it considered a
> service or a user application that is simply run in the background?
>
>
>
> This affects how systemd treats its control groups and priority and how I
> will go about troubleshooting this.
>
>
> Thanks.
>
>
>
> Bote
>
>
>
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