Enabling realtime scheduling and memory locking?

[Misha Ramendik]

Hello,

This is probably a FAQ, but I could not find the information anywhere. How
do I enable realtime scheduling and memory locking in modern Fedora? I have
v 28 now, maybe will have v29 soon.

On my main work laptop, I can't exactly remove the system and install
Fedora JAM :) so I need to do this on stock Fedora. I understand that
setuid on jackd and fluidsynth would probably make things better but is
this the best solution?

I also need to have this on a live-USB for another laptop, but that is a
rather tricky case. A pretty humble machine (AMD A6, 4Gb RAM laptop) is to
be used as a "sound box" with MIDI instruments. I don't think a heavy
KDE-based distribution is the ideal live image for it. If I could respin
Fedora JAM into something based on IceWM, or at least LXDE, that would be
great.

And finally, for future reference, I would appreciate knowing how to do the
same (enable realtime scheduling and memory locking) on CentOS. I am asking
this in case I doinstall Linux on that AMD A6 laptop permanently. My wife
uses this laptop, so I'd want something less frequently updating than
Fedora, so it will be CentOS (or, if I can't get CentOS to run on the
hardware, OpenSUSE).

-- 

Mikhail "Misha" Ramendik

SENIOR TECHNICAL WRITER

Red Hat Ireland
<https://www.redhat.com/>[e-mail]     M: [phone]
<https://red.ht/sig>

[Misha Ramendik]

Okay, I'm sorry. I was confused because adding the user to the jackuser
group did not appear to do anything, even after a newgrp command.

However, after a reboot, jackd started to use realtime scheduling and all
is well.

On Sun, Jan 27, 2019 at 12:26 AM Misha Ramendik <mramendi(a)redhat.com&gt; wrote:

>  Hello,
>
>  This is probably a FAQ, but I could not find the information anywhere. How
>  do I enable realtime scheduling and memory locking in modern Fedora? I have
>  v 28 now, maybe will have v29 soon.
>
>  On my main work laptop, I can't exactly remove the system and install
>  Fedora JAM :) so I need to do this on stock Fedora. I understand that
>  setuid on jackd and fluidsynth would probably make things better but is
>  this the best solution?
>
>  I also need to have this on a live-USB for another laptop, but that is a
>  rather tricky case. A pretty humble machine (AMD A6, 4Gb RAM laptop) is to
>  be used as a "sound box" with MIDI instruments. I don't think a heavy
>  KDE-based distribution is the ideal live image for it. If I could respin
>  Fedora JAM into something based on IceWM, or at least LXDE, that would be
>  great.
>
>  And finally, for future reference, I would appreciate knowing how to do
>  the same (enable realtime scheduling and memory locking) on CentOS. I am
>  asking this in case I doinstall Linux on that AMD A6 laptop permanently. My
>  wife uses this laptop, so I'd want something less frequently updating than
>  Fedora, so it will be CentOS (or, if I can't get CentOS to run on the
>  hardware, OpenSUSE).
>
>  --
>
>  Mikhail "Misha" Ramendik
>
>  SENIOR TECHNICAL WRITER
>
>  Red Hat Ireland
>  <https://www.redhat.com/>[e-mail]     M: [phone]
>  <https://red.ht/sig>
>  

-- 

Mikhail "Misha" Ramendik

SENIOR TECHNICAL WRITER

Red Hat Ireland
<https://www.redhat.com/>[e-mail]     M: [phone]
<https://red.ht/sig>