2.6.12-rc2-JadeX1 [[EBUILD ADDED]]

Tiger683 · patch-2.6.12-rc2-jadeX1.gz

JadeX Sources based on Realtime Preemption work by Ingo Molnar
Included patches put together and made to peacefully coexist by Tiger683
See the credits section for further contributors.
REISER4 is officially working with PREEMPT_RT enabled!!!!! Yehaw! *
_don't_forget_to_switch_off_4K_STACKS_when_using_it !!!!!!!!!
On request, i might create a patch with only RTP against a R4 patched kernel...
* See notes on architectures tested.
<=========================================================================>
Legal:
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

<==========================================================================>
Ok, now to the point:
this patchset is an attempt to bring the RTP to the Desktop environment
by providing it in a fairly stable form along with a few other patches enhancing
the features of the kernel and/or increasing the interactivity.
<==========================================================================>

slarti` · Retired Dev Joined: 20 Sep 2003 Posts: 376 Location: UK

Why?

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cokey · Advocate Joined: 23 Apr 2004 Posts: 3355

explain what is PREEMPT_RT is please
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Tiger683 · Posted: Thu Apr 07, 2005 6:01 pm Post subject:

slarti' : It has __at_least__ scientific value, and for me it has improved the desktop-interactivity A LOT.
no matter what ppl say, i experienced what is more than just audiophiles' need....about the release name... im a fan of ciaranm, as a dev, no matter what i think of his view on certain things..

cokehabit: Try it.... if i begin to explain a flamewar breaks out.... sorry____
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ewan.paton · Posted: Fri Apr 08, 2005 4:13 am Post subject:

what is it you need to do to enable realtime preemption, i read up on it a while back but never bothered trying anything, does it just work or do progs have to have conditions applied to them.

also is this about realtime cpu or disk access, i rember hearing about a patch that alowed disk access renicing which sounded cool but if this alows disk access premption it would be very useful.
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predatorfreak · Posted: Fri Apr 08, 2005 4:48 am Post subject:

rhill · Posted: Fri Apr 08, 2005 5:04 am Post subject:

oh dear god.
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predatorfreak · Posted: Fri Apr 08, 2005 5:22 am Post subject:

ewan.paton · Posted: Fri Apr 08, 2005 5:27 am Post subject:

predatorfreak · Posted: Fri Apr 08, 2005 5:38 am Post subject:

Jake · Veteran Joined: 31 Jul 2003 Posts: 1132

predatorfreak · Posted: Fri Apr 08, 2005 5:40 am Post subject:

Tiger683 · Posted: Fri Apr 08, 2005 5:54 am Post subject:

Heya,

this is more a conceptual release where i was trying to keep everything working,
and the work on getting r4 stable with this was enough for this one....

Realtime Preemption is about reducing the latency.... if a task times out, runs out of timeslice or
another task with higher prio and/or harder nice value comes up in a runqueue, the other one has
to get lost immediately..... It's reached through change of locking mechanisms in the Kernel,
and that fundamentally, more and more semaphores get replaced by mutex etc.

hmm, i wonder if i should tke a look at this dynamic tick patch now.....

cheers,

T
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Chaosite · Posted: Fri Apr 08, 2005 6:12 am Post subject:

Tiger683 · Posted: Fri Apr 08, 2005 6:18 am Post subject:

Ummm, ok, thats what everybody say, it may be true, but i have major interactivity improvement overall....

so if my desktop reacts faster AND my audio profits, it looks perfectly fine for me...

cheers

T

PS: No, i dont want a discussion about the sense of RTP here....if anyone does, go to OTW and start a poll like "Is RTP worth trying"
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Tiger683 · Posted: Fri Apr 08, 2005 7:38 am Post subject:

Ok, im currently testing the

darklegion · Guru Joined: 14 Nov 2004 Posts: 468

Okay the performance seems otherwise good,especially as far as preventing audio skipping is concerned but I got some pretty serious errors when I tried recompiling the kernel modules for vmware,which caused any apps launched after it to not startup at all.All apps already loaded continued to work smoothly(I'm still running right now) .Here's the first part of the message,from dmesg:

Tiger683 · Posted: Fri Apr 08, 2005 9:32 am Post subject:

darklegion:

Can you give me a link to the kernel modules?

I might take a look at it and if i get it to work, ill make a patch with it that applies to the kernel and makes it selectable in Kconfig....
Or are these not GPL? if not i might just make a patch for these.
Anyway, ill get back home in about 3-4 hours, so if you have a link give it, if not email them to
Tiger683 <AT> gmx <DOT> net

EDIT: Thx, ill look at it
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hyp0r · Tux's lil' helper Joined: 11 Oct 2003 Posts: 139

Tiger683 · Posted: Fri Apr 08, 2005 2:39 pm Post subject:

hyp0r · Tux's lil' helper Joined: 11 Oct 2003 Posts: 139

It's not the negative side of it. I can only ask the same as slarti did:

Tiger683 · Posted: Fri Apr 08, 2005 10:07 pm Post subject:

Ok, at first you might expect me to say something like "stop flaming my thread", but its not me and i respect your doubts
about the sense of it.
To be honest, the _primary_ reason for this was both not doing the same as (loosely said) many other patchsets already include AND
following what i experienced in my desktop environment, so better interactivity of applications (i don't play games, but non-skipping audio
and immediate response of applications are also a plus i think

).

ewan.paton · Posted: Sat Apr 09, 2005 12:56 am Post subject:

i get a kernel panic when i compile in cpufreq suport, without it it boots fine this is an amd64 in 32bit mode, i didnt try modules as i had stuff i needed the pc to do but will try later
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hyp0r · Tux's lil' helper Joined: 11 Oct 2003 Posts: 139

Yes, I have a bugreport. The bugreport is about your documentation, which should be sane.

Zinic · n00b Joined: 19 Dec 2004 Posts: 9 Location: Texas

Just like to thank Tiger for the nice work and all. Booted up fine and really does seem faster IMO.
Hope to see more of this patchset!
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