20 Aug
2012
20 Aug
'12
11:55 p.m.
how do I install the preempt kernel in ubuntu12.04 and make it the default kernel?
Your help with this question would be most welcome.
Kind regards trahern.
21 Aug
21 Aug
12:12 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
how do I install the preempt kernel in ubuntu12.04 and
make it the default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
--
Brett W. McCoy -- http://www.brettwmccoy.com
------------------------------------------------------------------------
"In the rhythm of music a secret is hidden; If I were to divulge it,
it would overturn the world."
-- Jelaleddin Rumi
12:24 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, 2012-08-20 at 18:12 -0400, Brett McCoy wrote:
On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
+1 for US, but don't expect hat "threadirqs" is set up.
how do I install the preempt kernel in
ubuntu12.04 and make it the default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
12:56 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, Aug 20, 2012 at 6:23 PM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
On Mon, 2012-08-20 at 18:12 -0400, Brett McCoy wrote:
I've never needed to do anything with "threadirqs" on Ubuntu Studio,
but maybe it's not necessary for the hardware I am using.
--
Brett W. McCoy -- http://www.brettwmccoy.com
------------------------------------------------------------------------
"In the rhythm of music a secret is hidden; If I were to divulge it,
it would overturn the world."
-- Jelaleddin Rumi
On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
+1 for US, but don't expect hat "threadirqs" is set up. how do I install the preempt kernel in
ubuntu12.04 and make it the default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
1:52 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, August 20, 2012 3:56 pm, Brett McCoy wrote:
On Mon, Aug 20, 2012 at 6:23 PM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
I think it is the rtirq script that may need setup. It seems to be ok as
is for an internal audio interface, but changing things does seem to help
for firewire or USB interfaces. This is especially true in a case where an
internal audio interface is not being used, but can't be disabled in bios.
--
Len Ovens
www.OvenWerks.net
On Mon, 2012-08-20 at 18:12 -0400, Brett McCoy
wrote:
I've never needed to do anything with "threadirqs" on Ubuntu Studio,
but maybe it's not necessary for the hardware I am using. On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
+1 for US, but don't expect hat "threadirqs" is set up. how do I install the preempt kernel in
ubuntu12.04 and make it the
default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
7:55 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, 2012-08-20 at 16:52 -0700, Len Ovens wrote:
On Mon, August 20, 2012 3:56 pm, Brett McCoy wrote:
Yes, taking care about the status of rtirq is a good thing.
On Mon, Aug 20, 2012 at 6:23 PM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
I think it is the rtirq script that may need setup. It seems to be ok as
is for an internal audio interface, but changing things does seem to help
for firewire or USB interfaces. This is especially true in a case where an
internal audio interface is not being used, but can't be disabled in bios. On Mon, 2012-08-20 at 18:12 -0400, Brett McCoy
wrote:
I've never needed to do anything with "threadirqs" on Ubuntu Studio,
but maybe it's not necessary for the hardware I am using. On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
> how do I install the preempt kernel in ubuntu12.04 and make it the
default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
+1 for US, but don't expect hat "threadirqs" is set up.
1 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, Aug 20, 2012 at 6:23 PM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
On Mon, 2012-08-20 at 18:12 -0400, Brett McCoy wrote:
According to this, setting up "threadirqs" is not necessary for Ubuntu
Studio 12.04:
https://help.ubuntu.com/community/FireWire#Set_IRQ_Priorities
--
Brett W. McCoy -- http://www.brettwmccoy.com
------------------------------------------------------------------------
"In the rhythm of music a secret is hidden; If I were to divulge it,
it would overturn the world."
-- Jelaleddin Rumi
On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
+1 for US, but don't expect hat "threadirqs" is set up. how do I install the preempt kernel in
ubuntu12.04 and make it the default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
7:53 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, 2012-08-20 at 18:59 -0400, Brett McCoy wrote:
On Mon, Aug 20, 2012 at 6:23 PM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
Apologize, yes not for a realtime kernel ;). IIRC for the default kernel
threadirqs was missing.
On Mon, 2012-08-20 at 18:12 -0400, Brett McCoy
wrote:
According to this, setting up "threadirqs" is not necessary for Ubuntu
Studio 12.04:
https://help.ubuntu.com/community/FireWire#Set_IRQ_Priorities On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
+1 for US, but don't expect hat "threadirqs" is set up. how do I install the preempt kernel in
ubuntu12.04 and make it the default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
4:14 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Tue, 21 Aug 2012 00:23:27 +0200, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
On Mon, 2012-08-20 at 18:12 -0400, Brett McCoy wrote:
threadirqs is builtin into the linux-lowlatency kernel. On any Ubuntu
derivative, you'd only need to install linux-lowlatency, rtirq-init(if you
need it) and set up realtime privilege.
To make linux-lowlatency default, I'd just not install linux-generic at
all.
On Mon, Aug 20, 2012 at 5:55 PM, trahern culver
<sound.warrior20(a)gmail.com> wrote:
+1 for US, but don't expect hat "threadirqs" is set up.
how do I install the preempt kernel in
ubuntu12.04 and make it the
default kernel?
Are you sure you need the realtime kernel? If you want to install
Ubuntu and are going to do audio work, I recommend you install Ubuntu
Studio, as it has everything setup out of the box for audio work,
including jack with realtime scheduling (for which you do NOT need the
realtime kernel).
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
4:33 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, Aug 20, 2012 at 10:14 PM, Kaj Ailomaa <zequence(a)mousike.me> wrote:
threadirqs is builtin into the linux-lowlatency
kernel. On any Ubuntu
derivative, you'd only need to install linux-lowlatency, rtirq-init(if you
need it) and set up realtime privilege.
To make linux-lowlatency default, I'd just not install linux-generic at all.
I'm pretty sure Ubuntu Studio uses a low latency kernel by default and
plain old vanilla Ubuntu does not.
--
Brett W. McCoy -- http://www.brettwmccoy.com
------------------------------------------------------------------------
"In the rhythm of music a secret is hidden; If I were to divulge it,
it would overturn the world."
-- Jelaleddin Rumi
12:19 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Mon, 2012-08-20 at 22:55 +0100, trahern culver wrote:
how do I install the preempt kernel in ubuntu12.04 and
make it the default kernel?
IMO that's not an issue, simply install it and then chose what you need
from what GRUB2 does display before startup. The only issuer is, that
you need to add "threadirqs" to what ever the entry
at /boot/grub/blabal.configbla, while using GRUB2, is. I prefer GRUB
legacy.
IMO Ubuntu Studio is easier to go, than Arch Linux is, but it doesn't
prevent to struggle with some issues regarding to using audio only
issues. Aaaarg, my English is terrible broken.
Use Ubuntu Studio or use Arch Linux, IMO any other distro at the moment
is unusable for serious audio work !!! e.g. AV Linux comes with compiz
as WM ... nothing is impossible...!!! (some might even like Poettering
trash), any other of those distros I tested, for my needs is carp.
I experienced that using Ubuntun Studio is less work, but using Arch (at
the moment) is able to fit "absolutely" to your needs ... something that
will be obsolete soon, since upstream rules Arch today, as it rules as
far as I know all other distros.
9:28 a.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On 08/20/12 23:55, trahern culver wrote:
how do I install the preempt kernel in ubuntu12.04 and
make it the default kernel?
Your help with this question would be most welcome.
Kind regards trahern.
If you're in for some adventure:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration#build_your_…
I've tested some of the packaged alternatives that are available (Ubuntu
Studio low-latency, Abogani real-time) but with my set-up (I use a
FireWire device) I get the best performance with kernels I built myself.
Best,
Jeremy
8:36 p.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On 08/20/2012 09:28 PM, Jeremy Jongepier wrote:
On 08/20/12 23:55, trahern culver wrote:
Debian Sid has an RT kernel available, too.
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
http://clanjones.org/david/
http://dancing-treefrog.deviantart.com/
how do I install the preempt kernel in
ubuntu12.04 and make it the
default kernel?
Your help with this question would be most welcome.
Kind regards trahern.
If you're in for some adventure:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration#build_your_…
I've tested some of the packaged alternatives that are available (Ubuntu
Studio low-latency, Abogani real-time) but with my set-up (I use a
FireWire device) I get the best performance with kernels I built myself.
8:57 p.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On 08/21/2012 08:36 PM, david wrote:
Debian Sid has an RT kernel available, too.
Checked the config.
CONFIG_HZ_250=y
Or doesn't that matter because
CONFIG_NO_HZ=y
??
I've never used a tickless kernel, does it perform better or is there no
real difference?
Best,
Jeremy
10:54 p.m.
New subject: how to install the real time preempt kernel in ubuntu12.04 and make it the defult?
On Tue, 2012-08-21 at 20:57 +0200, Jeremy Jongepier wrote:
On 08/21/2012 08:36 PM, david wrote:
Good question. I always set up CONFIG_HZ_1000=y, but I also use HPET.
There's a difference regarding to jitter between Hz 1000 and HPET when
using hardware MIDI. I'm unsure if there's a difference between tickless
yes and no. Some people claim that tickless = yes could cause issues.
Most of my kernels where compiled with tickless = yes and I don't think
that issues I got were related to this. I suspect that tickless did
improve MIDI jitter too, but I don't compare same kernels with tickless
yes/no. Dunno! However, IIRC tickless is only used when we use hrtimer
(HPET)???
Regards,
Ralf
Debian Sid has an RT kernel available, too.
Checked the config.
CONFIG_HZ_250=y
Or doesn't that matter because
CONFIG_NO_HZ=y
??
I've never used a tickless kernel, does it perform better or is there no
real difference?
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14 comments
7 participants
participants (7)
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Brett McCoy -
david -
Jeremy Jongepier -
Kaj Ailomaa -
Len Ovens -
Ralf Mardorf -
trahern culver