I have. They have moved away from an rt kernel (rt patch) to a full PREEMPT kernel (vanilla kernel no patches) as their default though they still have the full rt patch available in the repos studio ships with the other by default
On 10:21, Sun, Apr 5, 2015 Be <be.0@xxxxxxx> wrote:
Has anyone looked into what Ubuntu Studio is doing with the lowlatency
kernel? Would it be feasible to include a similarly configured kernel in
Fedora?
On 11/13/2014 10:59 AM, Brian Monroe wrote:
> I think so too, thanks for chiming in.
>
> I'm still waiting to get into the packagers group, but I have a koji
> account and theoretically could compile an rt kernel. I think the
> standard naming schema in other distros is kernel-rt. It should be
> only adding a few lines to the spec file to enable the rt kernel, but
> when you look at how many kernel update there are for Fedora every
> week, I'm not sure as to how up to date we'll be able to keep up due
> to the work load. We're already are down on developers, and people
> like Brandon are keeping us afloat.
>
> Are we going to be ok as a project to be behind a week or two in
> Kernel releases? Personally I'm for more stable kernels when it comes
> to music production vs. having the latest and greatest, but I also
> think that should be a clearly indicated as a feature
>
> That being said, I feel strongly as though others should take this
> task on, if not me, then someone else or better yet, a few of us.
>
>
> I'm looking into the Ubuntu Studio and turns out they dropped the RT
> kernel as default. They're using a "lowlatency" kernel instead of a rt
> kernel (though they do still supply an rt kernel but not by default).
> I do know that users are able to get 1.5 ms latency with zero xruns so
> I'm guessing they're doing something other than real-time scheduling,
> I just don't know what. Thoughts?
>
> On Wed Nov 12 2014 at 10:40:44 AM Be Ing <be.0@xxxxxxx
> <mailto:be.0@xxxxxxx>> wrote:
>
> Hello Fedora musicians, I've been lurking this list for a little
> bit and this is my first time chiming in on something.
>
> I think it is important to pursue an official realtime kernel for
> Fedora. I think a distribution focused on audio without a realtime
> kernel would have a serious bug, that IMO, would be worth delaying
> publication for.
>
> >So I had a beer with hansomepirate(jdulaney), who is, or was on
> the kernel
> sig, last night and we got to talking about a RT kernel.
> >
> >Last time we talked to the kernel folks about an rt kernel, they
> weren't
> impressed with the "need" for Fedora, but that was before the Spin was
> officially out.
> >
> >Now might be a good time to raise this issue again? I dug through my
> archives and found this thread. Now that we have an actual spin
> that's out,
> we can actually redo some of the testing to have more realistic tests.
> (multitrack with effects)
> >
> >I feel like right now, it's one of the few benefits that the
> ubuntu studio
> folks have (or at least claim to have) over us. The other is some
> semi-proprietary software that on... you know what, never mind
> it's getting
> off topic.
> >
> >Anyways, does the list think this is worth pursuing?
> >
> >>On Wed Feb 22 2012 at 9:10:29 PM Brian Monroe <briancmonroe at
> gmail.com
> <http://gmail.com>[https://admin.fedoraproject.org/mailman/listinfo/music]>
> wrote:
> >>
> >> Ok, I redid all the tests, while the system was only running my
> DE and the
> >> test, and then again when I put it under duress by running a
> script that
> >> looped "du -h /" and "ls -Ral /usr/" over and over. I ran the
> script twice
> >> to get my proc up a bit to emulate running some intese delays
> and reverbs
> >> or other effects.
> >>
> >> Ironically the kernels typically did better when the scripts
> were running.
> >> Personally I think there's a clear advantage with CCRMA's
> kernel or even
> >> just a preempt kernel in the max lat areas. Those max numbers
> jumped up
> >> close to where they were near the beggining of the test if
> anyone was
> >> wondering.
> >>
> >> Here's the file with both sets of tests and the uname -a info
> as requested
> >> by Fernando.
> >> -Brian
> >>
> >>> On Wed, Feb 22, 2012 at 6:54 AM, Brian Monroe <briancmonroe at
> gmail.com
> <http://gmail.com>[https://admin.fedoraproject.org/mailman/listinfo/music]
> >>> wrote:
> >>> I'll be sure to include that on the next batch. I used the
> kernel you
> >>> after installing the CCRMA repo when you use yum install
> kernel-rt, which
> >>> happens to be 3.0.17-1.rt33.1.fc16.ccrma.x86_64.rt. I'll go
> back and
> >>> include the other info to the old results when I do the load
> testing
> >>> tonight or tomorrow.
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