[PD] Which Linux distribution are you using?
Raphael Raccuia
rafael.raccuia at blindekinder.com
Mon Nov 15 23:06:15 CET 2010
Le 15. 11. 10 22:21, Pierre Massat a écrit :
> Hi,
> I have installed Ubuntu 10.04 LTS, plus some ubuntu studio stuff (the
> audio packages and the plugins). I also tried the rt-kernel. It didn't
> work.
> But i am amazed, blown away, baffled, etc. Because the generic kernel
> does have some crazy rt capabilities indeed. I guess the ubuntu studio
> packages must have created the audio group and jack must have written
> the proper things in the limit file, but still, it works surprisingly
> well. Jack can run in rt with a latency as low 4 ms without any xruns,
> although it crashes.It works just fine at 5.33 ms. Even pd itself work
> with an extremely low latency (I'd say below 7 ms), I'm assuming
> that's because it was configured to run in rt during the install.
> I don't even know if i need JACK anymore.
jack don't add latency, and it's a powerfull sound server... you can
connect pd to the outputs of your sound device and/or other sound/midi
softwares, then you can save a patchbay to recover your patch... it's
one of the most interesting stuffs on linux.
> Does any of you know how i can measure the actual latency in Pd?
have a look on jdelay: a simple jack command-line latency-meter. when
you start it, a new client appears in jack: connect it between pd out
and in, connect in and out in a pd patch, you'll get a time in frame:
frame/frequency = t in sec (ex 480 / 48000 = 0.010 = 10 ms). You can
connect it between sound device in and out and plug a jack between out
and in, you'll get the real round latency...
you will have to compile it, README explains all...
> I couldn't tell by ear which config was faster, Pd alone or Pd plus JACK.
maybe I'm wrong, but I thing only jack can provide rt...
cheers,
r
> Looks like it time to say goodbye to rt-kernels...
>
> This makes me happy.
>
> Cheers!
>
> Pierre
>
> 2010/11/15 András Murányi <muranyia at gmail.com <mailto:muranyia at gmail.com>>
>
> So, running the aforementioned RT kernel, managed to patch the
> latest nvidia driver following these general instructions:
> http://ubuntuforums.org/showpost.php?p=9233282&postcount=5
> <http://ubuntuforums.org/showpost.php?p=9233282&postcount=5>
> I'm already happy because it's quite some time that i haven't had
> the RT kernel!
>
> As i don't use GEM i cannot tell about it, but Pd got faster.
> Almost as fast as the 32-bit Pd was (on 64-bit Ubuntu - Hardy that
> time). It means i can almost use my MIDI sequencer patch without
> the GUI dropping out. Promising! Now i can dig into the patch for
> optimisation possibilities, and at the same time, keep on bugging
> the community for speeding up the GUI :o)
>
> Do you guys think i shall try it with a current 32-bit Pd to see
> if the 64-bit version is really slower...?
>
> (on a side note to RT kernel experiences: the CPU got hotter
> indeed, looks like i'll have to tweak the cooling fans again...)
>
> Andras
>
>
> On Mon, Nov 15, 2010 at 9:27 AM, cyrille henry <ch at chnry.net
> <mailto:ch at chnry.net>> wrote:
>
> hello,
> 195.36.24 is the nvidia driver version i'm using. mainly
> because it's the version shiped with ubuntu 10.04.
> i don't know what 260 would offer better, but i think it's not
> impressive.
> most of nvidia upgrade is adding support for new card.
> anyway, if you don't use graphics for any important stuff,
> then you probably don't care.
>
> i'll be interested to know your impression if you try this
> kernel for pd/Gem.
>
> Cyrille
>
> Le 14/11/2010 18:02, András Murányi a écrit :
>
> i'm using Ubuntu Lucid with standard kernel (64-bit), and
> performance in
> Pd hasn't really impressed me lately... and WHOA i've just
> found a PPA
> with RT kernel
> (https://launchpad.net/~abogani/+archive/ppa/
> <https://launchpad.net/%7Eabogani/+archive/ppa/>), which i'm
> very interested in - it's just that it comes with older
> Nvidia drivers
> 195.36.24 while the latest drivers from Nvidia are
> 260.19.21. Now does
> anyone know if i'll loose anything important with this
> older (but
> appropriately patched for RT) graphics driver? (btw i
> don't use graphics
> for anything important...)
>
> Andras
>
> On Sun, Nov 14, 2010 at 3:25 PM, cyrille henry
> <ch at chnry.net <mailto:ch at chnry.net>
> <mailto:ch at chnry.net <mailto:ch at chnry.net>>> wrote:
>
> hello,
>
> you say that you need a RT kernel : did you benchmarck the
> difference between a RT kernel and a standard kernel?
>
> anyway, i'm using ubuntu 10.04 with no optimisation.
> compiling pd/Gem is very fast and easy, so i don't wait
> the official
> package...
>
> cyrille
>
> Le 14/11/2010 13:48, Pierre Massat a écrit :
>
> Hi all!
>
> I have realized lately that Fedora/PlanetCCRMA may
> not be the
> best linux
> rt distro out there in terms of updates for Pd. So
> I wanted to
> conduct a
> survey among pd-list members to know who is using
> what. It seems
> like
> Ubuntu Studio is the distro that's most frequently
> updated. Too bed
> because the last time i tried to install it on my
> laptop it
> didn't work...
> Any advice would be appreciated.
> I need a rt kernel, of course...
>
> Pierre
>
>
>
>
>
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> --
> Muranyi Andras
>
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