13 Jan
2018
13 Jan
'18
4:21 p.m.
Try renaming it to audio.conf and relogin.
On Sat, 13 Jan 2018 14:58:28 +0000
Benny Alexandar <ben.alex(a)outlook.com> wrote:
Hi Len,
I'm using jackdmp 1.9.12. I checked the
file /etc/security/limits.d/audio.conf, and is named as
audio.conf.disabled. How to enable this ?
When I run my jack client standalone program, I could see the prints
as follows,
------------------
jackdmp 1.9.12
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
Cannot lock down 82280346 byte memory area (Cannot allocate memory)
creating alsa driver ...
hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit configuring for
48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods ALSA:
final selected sample format for capture: 32bit integer little-endian
ALSA: use 2 periods for capture ALSA: final selected sample format
for playback: 32bit integer little-endian ALSA: use 2 periods for
playback Cannot use real-time scheduling (RR/10)(1: Operation not
permitted) AcquireSelfRealTime error
Cannot lock down 82280346 byte memory area (Cannot allocate memory)
JACK server started
Cannot use real-time scheduling (RR/5)(1: Operation not permitted)
JackClient::AcquireSelfRealTime error
-----------------------------------
-ben
________________________________
From: Len Ovens <len(a)ovenwerks.net>
Sent: Friday, January 12, 2018 10:27 PM
To: Benny Alexandar
Cc: linux-audio-dev(a)lists.linuxaudio.org
Subject: Re: [LAD] Jackd & Real Time Kernel
On Fri, 12 Jan 2018, Benny Alexandar wrote:
--
Joakim
I just compiled simple_client.c and things starts
to work.
My doubt is do I need to install linux real-time kerel update for
JACK.
It depends... personally, I use the lowlatency kernel with no problems
using an ice1712 based PCI card audio interface. Your situation may
differ.
How do I know if jack is running real time, is it
by checking for
xruns ?
Jack runs in real time mode by default. If you are running jackd2
(version 1.9*) then check ~/.log/jack/jackdbus.log
for the line:
Thu Dec 28 10:38:26 2017: JACK server starting in realtime mode with
priority 10
Otherwise the same line will appear in jackd terminal output when
started.
Do note that part of the jackd instalation process sometimes gets
missed by some installers. There should be a file
/etc/security/limits.d/audio.conf If this is missing or named as
disabled, you may not be able to get jackd to start in realtime mode.
The two lines of importance in that file are:
@audio - rtprio 95
@audio - memlock unlimited
Depending on your distro the group may be other than audio.
Whatever that group is, your user needs to be a part of it. Most
audio distributions get this right already (even ubuntustudio), but
non-audio distros generally need this to be fixed. After adding
yourself to the audio (or whatever) group you will need to logout and
back in before that will have any effect.
--
Len Ovens
www.ovenwerks.net<http://www.ovenwerks.net>