Re: [LAU] limits.conf nice rtprio

On Aug 17, 2017 12:08, Jaromír Mikeš <mira.mikes@gmail.com> wrote:
>
>
>
> 2017-08-17 22:10 GMT+02:00 Ralf Mardorf <ralf.mardorf@alice-dsl.net>:
>>
>> On Thu, 17 Aug 2017 15:48:18 -0400, Paul Davis wrote:
>> >On Thu, Aug 17, 2017 at 3:21 PM, Fons Adriaensen wrote:
>> >> On Thu, Aug 17, 2017 at 01:59:29PM -0400, Paul Davis wrote:
>> >>
>> >> > parameters which were never really meant to be exposed to users
>> >>
>> >> then the at least the defaults should be OK. They usually are not.
>> >>
>> >I've never adjusted any of the parameters that are now on that tab in
>> >more than a decade.
>> >
>> >There has never been a pull request or a bug report suggesting new
>> >defaults.
>>
>> Why should somebody suggest new defaults? The values could be
>> adjusted, if required and QjackCtl provided most jack parameters, if not
>> all in a single tab, before it was split into two tabs. Much
>> likely LTS release distros still provide the old version of QjackCtl,
>> let alone that jack's defaults provided by package maintainers could
>> vary, I've seen configurations with --clients=foo
>> --ports-per-application=bar.
>
>
> The reason I started this topic is that I bought new USB sound card Focusrite 2i2.
> But I am not happy with latency 15-20ms is not fine for simple task I am using it.
> Just running japa to check RTA.
> Periods/Buffer 3, deadline scheduler, scaling_governor performance
>
> Just trying figure out if I can make somewhat better.
>
> mira

And to think all I did to get my cheap USB sound card to work at 5-10ms latency was install a low-latency kernel (from KXStudio) and change buffer and period settings on QJackCtl's non-Advanced settings tab.

That's on two different systems: one Intel i7, the other an AMD Phenom 2. No tweaking deadline scheduler or scaling governor (for the Intel, Phenom 2 has no such capability).

But I'm using Debian Testing + KXStudio, not ArchLinux or Ubuntu.

David W. Jones
gnome@hawaii.rr.com
authenticity, honesty, community
http://dancingtreefrog.com
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Received on Fri Aug 18 04:15:02 2017