[LAU] Ubuntustudio and frequency scaling

[Mac]

Well, I suppose that's impetus to stop procrastinating and upgrade to 18.04.

Ah, the fun and games. ;)

On Thu, Jun 7, 2018 at 11:57 AM, Len Ovens <len at ovenwerks.net> wrote:

> On Thu, 7 Jun 2018, Mac wrote:
>
> So, I was running a old version of Ardour on ubuntustudio 16.04.
>>
>
> Which is old... use 18.04
>
>>
>> I updated to Ardour 5.1.2.
>>
>> When the Ardour install file (.run) ran it warned me that I should turn
>> off
>> frequency scaling.
>>
>> After some googling it appears UBS doesn't ship with any of the typical
>> tools one
>> would use to adjust the cpu frequency.
>>
>> Most of the search results talk about installing gnome applets and other
>> stuff.
>>
>> Seem to me a distro that is targeted at such cpu intense usage would have
>> facilities to manage this.
>>
>> So, before I go off on an apt spree, I figured I ask if I'm missing
>> something.
>>
>
> No you are not missing something :) The ubuntustudio-controls in 18.04
> does include cpu governor setting, 16.04 does not. The same application for
> 18.10 does a lot more and also allows Boost to be shut off.
>
> Some things to be aware of:
>         - I don't know about debian in general, but Ubuntu sets Ondemand
>                 or Powersave at boot... about 60 seconds after everything
>                 else. This means that cpufrequtils sets performance at
>                 boot and then ondemand sets it back 60 sec later.
>                 Ondemand in /etc/rc*.d needs to be disabled
>         - cpu governing does not seem to affect audio with buffer size
>                 greater than 64.
>         - at low latency Boost also affects audio and should be truned
>                 off. It seems to be the change in cpu speed that causes
>                 trouble as I have run a cpu fixed at 800mhz with no
>                 trouble as compared to 1.6 Ghz on the same machine
>                 with Ondemand and xruns.
>
>
> --
> Len Ovens
> www.ovenwerks.net
>
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> Linux-audio-user at lists.linuxaudio.org
> https://lists.linuxaudio.org/listinfo/linux-audio-user
>
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